New upstream version 1.0upstream/1.0

47 files changed, 3947 insertions, 0 deletions

diff --git a/.reuse/dep5 b/.reuse/dep5
new file mode 100644
index 0000000..63a2cb1
--- /dev/null
+++ b/.reuse/dep5
@@ -0,0 +1,9 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: Hydrilla
+Upstream-Contact: Wojtek Kosior <koszko@koszko.org>
+Source: https://hydrillabugs.koszko.org/projects/hydrilla
+
+Files: debian/*
+Copyright: 2021,2022 Wojtek Kosior <koszko@koszko.org>
+License: CC0-1.0
+Comment: debian packaging (files only present in debian-debian branch)
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/LICENSES/0BSD.txt b/LICENSES/0BSD.txt
new file mode 100644
index 0000000..0b8ae76
--- /dev/null
+++ b/LICENSES/0BSD.txt
@@ -0,0 +1,5 @@
+Copyright (C) YEAR by AUTHOR EMAIL
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/LICENSES/AGPL-3.0-or-later.txt b/LICENSES/AGPL-3.0-or-later.txt
new file mode 100644
index 0000000..0c97efd
--- /dev/null
+++ b/LICENSES/AGPL-3.0-or-later.txt
@@ -0,0 +1,235 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+                            Preamble
+
+The GNU Affero General Public License is a free, copyleft license for software and other kinds of works, specifically designed to ensure cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed to take away your freedom to share and change the works.  By contrast, our General Public Licenses are intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users.
+
+When we speak of free software, we are referring to freedom, not price.  Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License which gives you legal permission to copy, distribute and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that improvements made in alternate versions of the program, if they receive widespread use, become available for other developers to incorporate.  Many developers of free software are heartened and encouraged by the resulting cooperation.  However, in the case of software used on network servers, this result may fail to come about. The GNU General Public License permits making a modified version and letting the public access it on a server without ever releasing its source code to the public.
+
+The GNU Affero General Public License is designed specifically to ensure that, in such cases, the modified source code becomes available to the community.  It requires the operator of a network server to provide the source code of the modified version running there to the users of that server.  Therefore, public use of a modified version, on a publicly accessible server, gives the public access to the source code of the modified version.
+
+An older license, called the Affero General Public License and published by Affero, was designed to accomplish similar goals.  This is a different license, not a version of the Affero GPL, but Affero has released a new version of the Affero GPL which permits relicensing under this license.
+
+The precise terms and conditions for copying, distribution and modification follow.
+
+                       TERMS AND CONDITIONS
+
+0. Definitions.
+
+"This License" refers to version 3 of the GNU Affero General Public License.
+
+"Copyright" also means copyright-like laws that apply to other kinds of works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this License.  Each licensee is addressed as "you".  "Licensees" and "recipients" may be individuals or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other than the making of an exact copy.  The resulting work is called a "modified version" of the earlier work or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based on the Program.
+
+To "propagate" a work means to do anything with it that, without permission, would make you directly or secondarily liable for infringement under applicable copyright law, except executing it on a computer or modifying a private copy.  Propagation includes copying, distribution (with or without modification), making available to the public, and in some countries other activities as well.
+
+To "convey" a work means any kind of propagation that enables other parties to make or receive copies.  Mere interaction with a user through a computer network, with no transfer of a copy, is not conveying.
+
+An interactive user interface displays "Appropriate Legal Notices" to the extent that it includes a convenient and prominently visible feature that (1) displays an appropriate copyright notice, and (2) tells the user that there is no warranty for the work (except to the extent that warranties are provided), that licensees may convey the work under this License, and how to view a copy of this License.  If the interface presents a list of user commands or options, such as a menu, a prominent item in the list meets this criterion.
+
+1. Source Code.
+The "source code" for a work means the preferred form of the work for making modifications to it.  "Object code" means any non-source form of a work.
+
+A "Standard Interface" means an interface that either is an official standard defined by a recognized standards body, or, in the case of interfaces specified for a particular programming language, one that is widely used among developers working in that language.
+
+The "System Libraries" of an executable work include anything, other than the work as a whole, that (a) is included in the normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to the public in source code form.  A "Major Component", in this context, means a major essential component (kernel, window system, and so on) of the specific operating system (if any) on which the executable work runs, or a compiler used to produce the work, or an object code interpreter used to run it.
+
+The "Corresponding Source" for a work in object code form means all the source code needed to generate, install, and (for an executable work) run the object code and to modify the work, including scripts to control those activities.  However, it does not include the work's System Libraries, or general-purpose tools or generally available free programs which are used unmodified in performing those activities but which are not part of the work.  For example, Corresponding Source includes interface definition files associated with source files for the work, and the source code for shared libraries and dynamically linked subprograms that the work is specifically designed to require, such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users can regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same work.
+
+2. Basic Permissions.
+All rights granted under this License are granted for the term of copyright on the Program, and are irrevocable provided the stated conditions are met.  This License explicitly affirms your unlimited permission to run the unmodified Program.  The output from running a covered work is covered by this License only if the output, given its content, constitutes a covered work.  This License acknowledges your rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey, without conditions so long as your license otherwise remains in force.  You may convey covered works to others for the sole purpose of having them make modifications exclusively for you, or provide you with facilities for running those works, provided that you comply with the terms of this License in conveying all material for which you do not control copyright.  Those thus making or running the covered works for you must do so exclusively on your behalf, under your direction and control, on terms that prohibit them from making any copies of your copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the conditions stated below.  Sublicensing is not allowed; section 10 makes it unnecessary.
+
+3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+No covered work shall be deemed part of an effective technological measure under any applicable law fulfilling obligations under article 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar laws prohibiting or restricting circumvention of such measures.
+
+When you convey a covered work, you waive any legal power to forbid circumvention of technological measures to the extent such circumvention is effected by exercising rights under this License with respect to the covered work, and you disclaim any intention to limit operation or modification of the work as a means of enforcing, against the work's users, your or third parties' legal rights to forbid circumvention of technological measures.
+
+4. Conveying Verbatim Copies.
+You may convey verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice; keep intact all notices stating that this License and any non-permissive terms added in accord with section 7 apply to the code; keep intact all notices of the absence of any warranty; and give all recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey, and you may offer support or warranty protection for a fee.
+
+5. Conveying Modified Source Versions.
+You may convey a work based on the Program, or the modifications to produce it from the Program, in the form of source code under the terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is released under this License and any conditions added under section 7.  This requirement modifies the requirement in section 4 to "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this License to anyone who comes into possession of a copy.  This License will therefore apply, along with any applicable section 7 additional terms, to the whole of the work, and all its parts, regardless of how they are packaged.  This License gives no permission to license the work in any other way, but it does not invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display Appropriate Legal Notices; however, if the Program has interactive interfaces that do not display Appropriate Legal Notices, your work need not make them do so.
+
+A compilation of a covered work with other separate and independent works, which are not by their nature extensions of the covered work, and which are not combined with it such as to form a larger program, in or on a volume of a storage or distribution medium, is called an "aggregate" if the compilation and its resulting copyright are not used to limit the access or legal rights of the compilation's users beyond what the individual works permit.  Inclusion of a covered work in an aggregate does not cause this License to apply to the other parts of the aggregate.
+
+6. Conveying Non-Source Forms.
+You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the machine-readable Corresponding Source under the terms of this License, in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by the Corresponding Source fixed on a durable physical medium customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product (including a physical distribution medium), accompanied by a written offer, valid for at least three years and valid for as long as you offer spare parts or customer support for that product model, to give anyone who possesses the object code either (1) a copy of the Corresponding Source for all the software in the product that is covered by this License, on a durable physical medium customarily used for software interchange, for a price no more than your reasonable cost of physically performing this conveying of source, or (2) access to copy the Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the written offer to provide the Corresponding Source.  This alternative is allowed only occasionally and noncommercially, and only if you received the object code with such an offer, in accord with subsection 6b.
+
+    d) Convey the object code by offering access from a designated place (gratis or for a charge), and offer equivalent access to the Corresponding Source in the same way through the same place at no further charge.  You need not require recipients to copy the Corresponding Source along with the object code.  If the place to copy the object code is a network server, the Corresponding Source may be on a different server (operated by you or a third party) that supports equivalent copying facilities, provided you maintain clear directions next to the object code saying where to find the Corresponding Source.  Regardless of what server hosts the Corresponding Source, you remain obligated to ensure that it is available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided you inform other peers where the object code and Corresponding Source of the work are being offered to the general public at no charge under subsection 6d.
+
+A separable portion of the object code, whose source code is excluded from the Corresponding Source as a System Library, need not be included in conveying the object code work.
+
+A "User Product" is either (1) a "consumer product", which means any tangible personal property which is normally used for personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling.  In determining whether a product is a consumer product, doubtful cases shall be resolved in favor of coverage.  For a particular product received by a particular user, "normally used" refers to a typical or common use of that class of product, regardless of the status of the particular user or of the way in which the particular user actually uses, or expects or is expected to use, the product.  A product is a consumer product regardless of whether the product has substantial commercial, industrial or non-consumer uses, unless such uses represent the only significant mode of use of the product.
+
+"Installation Information" for a User Product means any methods, procedures, authorization keys, or other information required to install and execute modified versions of a covered work in that User Product from a modified version of its Corresponding Source.  The information must suffice to ensure that the continued functioning of the modified object code is in no case prevented or interfered with solely because modification has been made.
+
+If you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the conveying occurs as part of a transaction in which the right of possession and use of the User Product is transferred to the recipient in perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source conveyed under this section must be accompanied by the Installation Information.  But this requirement does not apply if neither you nor any third party retains the ability to install modified object code on the User Product (for example, the work has been installed in ROM).
+
+The requirement to provide Installation Information does not include a requirement to continue to provide support service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product in which it has been modified or installed.  Access to a network may be denied when the modification itself materially and adversely affects the operation of the network or violates the rules and protocols for communication across the network.
+
+Corresponding Source conveyed, and Installation Information provided, in accord with this section must be in a format that is publicly documented (and with an implementation available to the public in source code form), and must require no special password or key for unpacking, reading or copying.
+
+7. Additional Terms.
+"Additional permissions" are terms that supplement the terms of this License by making exceptions from one or more of its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were included in this License, to the extent that they are valid under applicable law.  If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it.  (Additional permissions may be written to require their own removal in certain cases when you modify the work.)  You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be marked in reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions directly impose on those licensors and authors.
+
+All other non-permissive additional terms are considered "further restrictions" within the meaning of section 10.  If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term.  If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way.
+
+8. Termination.
+
+You may not propagate or modify a covered work except as expressly provided under this License.  Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11).
+
+However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice.
+
+Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License.  If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10.
+
+9. Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run a copy of the Program.  Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance.  However, nothing other than this License grants you permission to propagate or modify any covered work.  These actions infringe copyright if you do not accept this License.  Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so.
+
+10. Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License.  You are not responsible for enforcing compliance by third parties with this License.
+
+An "entity transaction" is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations.  If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License.  For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it.
+
+11. Patents.
+
+A "contributor" is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based.  The work thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version.  For purposes of this definition, "control" includes the right to grant patent sublicenses in a manner consistent with the requirements of this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free patent license under the contributor's essential patent claims, to make, use, sell, offer for sale, import and otherwise run, modify and propagate the contents of its contributor version.
+
+In the following three paragraphs, a "patent license" is any express agreement or commitment, however denominated, not to enforce a patent (such as an express permission to practice a patent or covenant not to sue for patent infringement).  To "grant" such a patent license to a party means to make such an agreement or commitment not to enforce a patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it.
+
+A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License.  You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law.
+
+12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License.  If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program.
+
+13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network (if your version supports such interaction) an opportunity to receive the Corresponding Source of your version by providing access to the Corresponding Source from a network server at no charge, through some standard or customary means of facilitating copying of software.  This Corresponding Source shall include the Corresponding Source for any work covered by version 3 of the GNU General Public License that is incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU General Public License into a single combined work, and to convey the resulting work.  The terms of this License will continue to apply to the part which is the covered work, but the work with which it is combined will remain governed by version 3 of the GNU General Public License.
+
+14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions of the GNU Affero General Public License from time to time.  Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program specifies that a certain numbered version of the GNU Affero General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation.  If the Program does not specify a version number of the GNU Affero General Public License, you may choose any version ever published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions of the GNU Affero General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program.
+
+Later license versions may give you additional or different permissions.  However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version.
+
+15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program.  It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found.
+
+     <one line to give the program's name and a brief idea of what it does.>
+     Copyright (C) <year>  <name of author>
+
+     This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer network, you should also make sure that it provides a way for users to get its source.  For example, if your program is a web application, its interface could display a "Source" link that leads users to an archive of the code.  There are many ways you could offer source, and different solutions will be better for different programs; see section 13 for the specific requirements.
+
+You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU AGPL, see <http://www.gnu.org/licenses/>.
diff --git a/LICENSES/CC-BY-SA-4.0.txt b/LICENSES/CC-BY-SA-4.0.txt
new file mode 100644
index 0000000..835a683
--- /dev/null
+++ b/LICENSES/CC-BY-SA-4.0.txt
@@ -0,0 +1,170 @@
+Creative Commons Attribution-ShareAlike 4.0 International
+
+ Creative Commons Corporation (“Creative Commons”) is not a law firm and does not provide legal services or legal advice. Distribution of Creative Commons public licenses does not create a lawyer-client or other relationship. Creative Commons makes its licenses and related information available on an “as-is” basis. Creative Commons gives no warranties regarding its licenses, any material licensed under their terms and conditions, or any related information. Creative Commons disclaims all liability for damages resulting from their use to the fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and conditions that creators and other rights holders may use to share original works of authorship and other material subject to copyright and certain other rights specified in the public license below. The following considerations are for informational purposes only, are not exhaustive, and do not form part of our licenses.
+
+Considerations for licensors: Our public licenses are intended for use by those authorized to give the public permission to use material in ways otherwise restricted by copyright and certain other rights. Our licenses are irrevocable. Licensors should read and understand the terms and conditions of the license they choose before applying it. Licensors should also secure all rights necessary before applying our licenses so that the public can reuse the material as expected. Licensors should clearly mark any material not subject to the license. This includes other CC-licensed material, or material used under an exception or limitation to copyright. More considerations for licensors.
+
+Considerations for the public: By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor’s permission is not necessary for any reason–for example, because of any applicable exception or limitation to copyright–then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described.
+
+Although not required by our licenses, you are encouraged to respect those requests where reasonable. More considerations for the public.
+
+Creative Commons Attribution-ShareAlike 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-ShareAlike 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.
+
+Section 1 – Definitions.
+
+     a.	Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.
+
+     b.	Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.
+
+     c.	BY-SA Compatible License means a license listed at creativecommons.org/compatiblelicenses, approved by Creative Commons as essentially the equivalent of this Public License.
+
+     d.	Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.
+
+     e.	Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.
+
+     f.	Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.
+
+     g.	License Elements means the license attributes listed in the name of a Creative Commons Public License. The License Elements of this Public License are Attribution and ShareAlike.
+
+     h.	Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License.
+
+     i.	Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.
+
+     j.	Licensor means the individual(s) or entity(ies) granting rights under this Public License.
+
+     k.	Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.
+
+     l.	Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.
+
+     m.	You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning.
+
+Section 2 – Scope.
+
+     a.	License grant.
+
+          1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:
+
+               A. reproduce and Share the Licensed Material, in whole or in part; and
+
+               B. produce, reproduce, and Share Adapted Material.
+
+          2. Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.
+
+          3. Term. The term of this Public License is specified in Section 6(a).
+
+          4. Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a)(4) never produces Adapted Material.
+
+          5. Downstream recipients.
+
+               A. Offer from the Licensor – Licensed Material. Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.
+
+               B. Additional offer from the Licensor – Adapted Material. Every recipient of Adapted Material from You automatically receives an offer from the Licensor to exercise the Licensed Rights in the Adapted Material under the conditions of the Adapter’s License You apply.
+
+               C. No downstream restrictions. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.
+
+          6. No endorsement. Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).
+
+     b.	Other rights.
+
+          1. Moral rights, such as the right of integrity, are not licensed under this Public License, nor are publicity, privacy, and/or other similar personality rights; however, to the extent possible, the Licensor waives and/or agrees not to assert any such rights held by the Licensor to the limited extent necessary to allow You to exercise the Licensed Rights, but not otherwise.
+
+          2. Patent and trademark rights are not licensed under this Public License.
+
+          3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties.
+
+Section 3 – License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the following conditions.
+
+     a.	Attribution.
+
+          1. If You Share the Licensed Material (including in modified form), You must:
+
+               A. retain the following if it is supplied by the Licensor with the Licensed Material:
+
+                    i.	identification of the creator(s) of the Licensed Material and any others designated to receive attribution, in any reasonable manner requested by the Licensor (including by pseudonym if designated);
+
+                    ii.	a copyright notice;
+
+                    iii. a notice that refers to this Public License;
+
+                    iv.	a notice that refers to the disclaimer of warranties;
+
+                    v.	a URI or hyperlink to the Licensed Material to the extent reasonably practicable;
+
+               B. indicate if You modified the Licensed Material and retain an indication of any previous modifications; and
+
+               C. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.
+
+          2. You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.
+
+          3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.
+
+     b.	ShareAlike.In addition to the conditions in Section 3(a), if You Share Adapted Material You produce, the following conditions also apply.
+
+          1. The Adapter’s License You apply must be a Creative Commons license with the same License Elements, this version or later, or a BY-SA Compatible License.
+
+          2. You must include the text of, or the URI or hyperlink to, the Adapter's License You apply. You may satisfy this condition in any reasonable manner based on the medium, means, and context in which You Share Adapted Material.
+
+          3. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, Adapted Material that restrict exercise of the rights granted under the Adapter's License You apply.
+
+Section 4 – Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:
+
+     a.	for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database;
+
+     b.	if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material, including for purposes of Section 3(b); and
+
+     c.	You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.
+For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.
+
+Section 5 – Disclaimer of Warranties and Limitation of Liability.
+
+     a.	Unless otherwise separately undertaken by the Licensor, to the extent possible, the Licensor offers the Licensed Material as-is and as-available, and makes no representations or warranties of any kind concerning the Licensed Material, whether express, implied, statutory, or other. This includes, without limitation, warranties of title, merchantability, fitness for a particular purpose, non-infringement, absence of latent or other defects, accuracy, or the presence or absence of errors, whether or not known or discoverable. Where disclaimers of warranties are not allowed in full or in part, this disclaimer may not apply to You.
+
+     b.	To the extent possible, in no event will the Licensor be liable to You on any legal theory (including, without limitation, negligence) or otherwise for any direct, special, indirect, incidental, consequential, punitive, exemplary, or other losses, costs, expenses, or damages arising out of this Public License or use of the Licensed Material, even if the Licensor has been advised of the possibility of such losses, costs, expenses, or damages. Where a limitation of liability is not allowed in full or in part, this limitation may not apply to You.
+
+     c.	The disclaimer of warranties and limitation of liability provided above shall be interpreted in a manner that, to the extent possible, most closely approximates an absolute disclaimer and waiver of all liability.
+
+Section 6 – Term and Termination.
+
+     a.	This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.
+
+     b.	Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:
+
+          1. automatically as of the date the violation is cured, provided it is cured within 30 days of Your discovery of the violation; or
+
+          2. upon express reinstatement by the Licensor.
+
+     c.	For the avoidance of doubt, this Section 6(b) does not affect any right the Licensor may have to seek remedies for Your violations of this Public License.
+
+     d.	For the avoidance of doubt, the Licensor may also offer the Licensed Material under separate terms or conditions or stop distributing the Licensed Material at any time; however, doing so will not terminate this Public License.
+
+     e.	Sections 1, 5, 6, 7, and 8 survive termination of this Public License.
+
+Section 7 – Other Terms and Conditions.
+
+     a.	The Licensor shall not be bound by any additional or different terms or conditions communicated by You unless expressly agreed.
+
+     b.	Any arrangements, understandings, or agreements regarding the Licensed Material not stated herein are separate from and independent of the terms and conditions of this Public License.
+
+Section 8 – Interpretation.
+
+     a.	For the avoidance of doubt, this Public License does not, and shall not be interpreted to, reduce, limit, restrict, or impose conditions on any use of the Licensed Material that could lawfully be made without permission under this Public License.
+
+     b.	To the extent possible, if any provision of this Public License is deemed unenforceable, it shall be automatically reformed to the minimum extent necessary to make it enforceable. If the provision cannot be reformed, it shall be severed from this Public License without affecting the enforceability of the remaining terms and conditions.
+
+     c.	No term or condition of this Public License will be waived and no failure to comply consented to unless expressly agreed to by the Licensor.
+
+     d.	Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.
+
+Creative Commons is not a party to its public licenses. Notwithstanding, Creative Commons may elect to apply one of its public licenses to material it publishes and in those instances will be considered the “Licensor.” Except for the limited purpose of indicating that material is shared under a Creative Commons public license or as otherwise permitted by the Creative Commons policies published at creativecommons.org/policies, Creative Commons does not authorize the use of the trademark “Creative Commons” or any other trademark or logo of Creative Commons without its prior written consent including, without limitation, in connection with any unauthorized modifications to any of its public licenses or any other arrangements, understandings, or agreements concerning use of licensed material. For the avoidance of doubt, this paragraph does not form part of the public licenses.
+
+Creative Commons may be contacted at creativecommons.org.
diff --git a/LICENSES/CC0-1.0.txt b/LICENSES/CC0-1.0.txt
new file mode 100644
index 0000000..0e259d4
--- /dev/null
+++ b/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
+    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
+    INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
+    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
+    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
+    HEREUNDER.
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator
+and subsequent owner(s) (each and all, an "owner") of an original work of
+authorship and/or a database (each, a "Work").
+
+Certain owners wish to permanently relinquish those rights to a Work for
+the purpose of contributing to a commons of creative, cultural and
+scientific works ("Commons") that the public can reliably and without fear
+of later claims of infringement build upon, modify, incorporate in other
+works, reuse and redistribute as freely as possible in any form whatsoever
+and for any purposes, including without limitation commercial purposes.
+These owners may contribute to the Commons to promote the ideal of a free
+culture and the further production of creative, cultural and scientific
+works, or to gain reputation or greater distribution for their Work in
+part through the use and efforts of others.
+
+For these and/or other purposes and motivations, and without any
+expectation of additional consideration or compensation, the person
+associating CC0 with a Work (the "Affirmer"), to the extent that he or she
+is an owner of Copyright and Related Rights in the Work, voluntarily
+elects to apply CC0 to the Work and publicly distribute the Work under its
+terms, with knowledge of his or her Copyright and Related Rights in the
+Work and the meaning and intended legal effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be
+protected by copyright and related or neighboring rights ("Copyright and
+Related Rights"). Copyright and Related Rights include, but are not
+limited to, the following:
+
+  i. the right to reproduce, adapt, distribute, perform, display,
+     communicate, and translate a Work;
+ ii. moral rights retained by the original author(s) and/or performer(s);
+iii. publicity and privacy rights pertaining to a person's image or
+     likeness depicted in a Work;
+ iv. rights protecting against unfair competition in regards to a Work,
+     subject to the limitations in paragraph 4(a), below;
+  v. rights protecting the extraction, dissemination, use and reuse of data
+     in a Work;
+ vi. database rights (such as those arising under Directive 96/9/EC of the
+     European Parliament and of the Council of 11 March 1996 on the legal
+     protection of databases, and under any national implementation
+     thereof, including any amended or successor version of such
+     directive); and
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
+     implementations thereof.
+
+2. Waiver. To the greatest extent permitted by, but not in contravention
+of, applicable law, Affirmer hereby overtly, fully, permanently,
+irrevocably and unconditionally waives, abandons, and surrenders all of
+Affirmer's Copyright and Related Rights and associated claims and causes
+of action, whether now known or unknown (including existing as well as
+future claims and causes of action), in the Work (i) in all territories
+worldwide, (ii) for the maximum duration provided by applicable law or
+treaty (including future time extensions), (iii) in any current or future
+medium and for any number of copies, and (iv) for any purpose whatsoever,
+including without limitation commercial, advertising or promotional
+purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each
+member of the public at large and to the detriment of Affirmer's heirs and
+successors, fully intending that such Waiver shall not be subject to
+revocation, rescission, cancellation, termination, or any other legal or
+equitable action to disrupt the quiet enjoyment of the Work by the public
+as contemplated by Affirmer's express Statement of Purpose.
+
+3. Public License Fallback. Should any part of the Waiver for any reason
+be judged legally invalid or ineffective under applicable law, then the
+Waiver shall be preserved to the maximum extent permitted taking into
+account Affirmer's express Statement of Purpose. In addition, to the
+extent the Waiver is so judged Affirmer hereby grants to each affected
+person a royalty-free, non transferable, non sublicensable, non exclusive,
+irrevocable and unconditional license to exercise Affirmer's Copyright and
+Related Rights in the Work (i) in all territories worldwide, (ii) for the
+maximum duration provided by applicable law or treaty (including future
+time extensions), (iii) in any current or future medium and for any number
+of copies, and (iv) for any purpose whatsoever, including without
+limitation commercial, advertising or promotional purposes (the
+"License"). The License shall be deemed effective as of the date CC0 was
+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
+Rights in the Work or (ii) assert any associated claims and causes of
+action with respect to the Work, in either case contrary to Affirmer's
+express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
+    surrendered, licensed or otherwise affected by this document.
+ b. Affirmer offers the Work as-is and makes no representations or
+    warranties of any kind concerning the Work, express, implied,
+    statutory or otherwise, including without limitation warranties of
+    title, merchantability, fitness for a particular purpose, non
+    infringement, or the absence of latent or other defects, accuracy, or
+    the present or absence of errors, whether or not discoverable, all to
+    the greatest extent permissible under applicable law.
+ c. Affirmer disclaims responsibility for clearing rights of other persons
+    that may apply to the Work or any use thereof, including without
+    limitation any person's Copyright and Related Rights in the Work.
+    Further, Affirmer disclaims responsibility for obtaining any necessary
+    consents, permissions or other rights required for any use of the
+    Work.
+ d. Affirmer understands and acknowledges that Creative Commons is not a
+    party to this document and has no duty or obligation with respect to
+    this CC0 or use of the Work.
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..558e461
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+include src/hydrilla/server/locales/*/LC_MESSAGES/hydrilla-messages.po
+include tests/source-package-example/*
+include tests/source-package-example/LICENSES/*
+include tests/source-package-example/.reuse/*
+global-exclude .git .gitignore .gitmodules
diff --git a/PKG-INFO b/PKG-INFO
new file mode 100644
index 0000000..dc23bac
--- /dev/null
+++ b/PKG-INFO
@@ -0,0 +1,138 @@
+Metadata-Version: 2.1
+Name: hydrilla
+Version: 1.0
+Summary: Hydrilla repository server
+Home-page: https://git.koszko.org/pydrilla
+Author: Wojtek Kosior
+Author-email: koszko@koszko.org
+License: AGPL-3.0-or-later
+Project-URL: Bug Tracker, https://hydrillabugs.koszko.org/projects/hydrilla
+Description: # Hydrilla (Python implementation)
+        
+        This is the repository of Python incarnation of [Hydrilla](https://hydrillabugs.koszko.org/projects/hydrilla/wiki), a repository software to serve [Haketilo](https://hydrillabugs.koszko.org/projects/haketilo/wiki) packages.
+        
+        The information below is meant to help hack on the codebase. If you're instead looking for some noob-friendly documentation, see the [user manual](https://hydrillabugs.koszko.org/projects/hydrilla/wiki/User_manual).
+        
+        ## Dependencies
+        
+        ### Runtime
+        
+        * Python3 (>= 3.7)
+        * [hydrilla.builder](https://git.koszko.org/hydrilla-builder/)
+        * flask
+        * click
+        * jsonschema (>= 3.0)
+        
+        ### Build
+        
+        * setuptools
+        * wheel
+        * setuptools_scm
+        * babel
+        
+        ### Test
+        
+        * pytest
+        * reuse
+        
+        ## Building
+        
+        We're using setuptools. You can build a wheel under `dist/` with
+        ``` shell
+        python3 -m build
+        ```
+        Optionally, add a `--no-isolation` option to the second command to have it use system packages where possible instead of downloading all dependencies from PyPI.
+        
+        The generated .whl file can then be used to install Hydrilla either globally or in the current Python virtualenv:
+        ```shell
+        python3 -m pip install dist/put_the_name_of_generated_file_here.whl
+        ```
+        
+        ### PyPI considerations
+        
+        Commands like `python3 -m build` and `python3 -m pip` but also `virtualenv` will by default download the dependencies from PyPI repository[^pypi]. Although this is what many people want, it carries along a freedom issue. PyPI is not committed to only hosting libre software packages[^pypi_freeware] and, like any platform allowing upload of code by the public, has lower package standards than repositories of many operating system distributions. For this reason you are encouraged to use the dependencies as provided by your distribution.
+        
+        To perform the build and installation without PyPI, first install all dependencies system-wide. For example, in Debian-based distributions (including Trisquel):
+        ``` shell
+        sudo apt install python3-flask python3-flask python3-jsonschema \
+             python3-setuptools python3-setuptools-scm python3-babel python3-wheel
+        ```
+        
+        Then, block programs you're about to spawn from accessing https://pypi.org. If running on a GNU/Linux system you can utilize Linux user namespaces:
+        ``` shell
+        unshare -Urn
+        ```
+        
+        The above will put you in a network-isolated shell. If you're using a virtualenv, activate it **after** the `unshare` command.
+        
+        Now, in unpacked source directories of **both** `hydrilla-builder` and `hydrilla`, run the build and installation commands:
+        ``` shell
+        python3 -m build --no-isolation
+        python3 -m pip install dist/hydrilla*.whl # or use the full file name
+        ```
+        
+        [^pypi]: [https://pypi.org/](https://pypi.org/)
+        [^pypi_freeware]: [https://pypi.org/search/?c=License+%3A%3A+Freeware](https://pypi.org/search/?c=License+%3A%3A+Freeware)
+        
+        ## Testing
+        
+        For tests to pass you need compiled message catalogs to be present. If you've performed the build at least once, they're already there. Otherwise, you need to run `./setup.py compile_catalog`. Then you can run the actual tests:
+        ``` shell
+        python3 -m pytest
+        ```
+        
+        ## Running
+        
+        ### Hydrilla command
+        
+        Hydrilla includes a `hydrilla` shell command that can be used to quickly and easily spawn a local instance, e.g.:
+        ```
+        hydrilla -m /path/to/where/package/files/to/serve/are/stored -p 10112
+        ```
+        This will cause the resources from provided path to be served at [http://127.0.0.1:10112/](http://127.0.0.1:10112/).
+        
+        The actual packages to serve are made using [Hydrilla builder](https://git.koszko.org/hydrilla-builder/).
+        
+        For more information about available options, pass the `--help` flag to `hydrilla` command:
+        ``` shell
+        hydrilla --help
+        ```
+        
+        If you navigate your POSIX shell to Hydrilla sources directory, you can also consult the included manpage (`man` tool required):
+        ``` shell
+        man ./doc/man/man1/hydrilla.1
+        ```
+        
+        Last but not least, you might find it useful to consult the default, internal configuration file of Hydrilla that resides under `src/hydrilla/server/config.json` in the sources repository.
+        
+        ### WSGI
+        
+        If you want to test a more production-suitable deployment option, consult sample Apache2 config files and a WSGI script supplied in `doc/examples` directory.
+        
+        ## Copying
+        
+        Hydrilla is Copyright (C) 2021-2022 Wojtek Kosior and contributors, entirely available under the GNU Affero General Public License version 3 or later. Some files might also give you broader permissions, see comments inside them.
+        
+        *I, Wojtek Kosior, thereby promise not to sue for violation of this project's license. Although I request that you do not make use this code in a proprietary program, I am not going to enforce this in court.*
+        
+        ## Contributing
+        
+        Please visit our Redmine instance at https://hydrillabugs.koszko.org.
+        
+        You can also write an email to koszko@koszko.org.
+        
+Keywords: hydrilla,haketilo
+Platform: UNKNOWN
+Classifier: Development Status :: 4 - Beta
+Classifier: Intended Audience :: Developers
+Classifier: Environment :: Web Environment
+Classifier: Environment :: Console
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI
+Classifier: License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+Classifier: Natural Language :: English
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 3 :: Only
+Requires-Python: >=3.7
+Description-Content-Type: text/markdown
+Provides-Extra: setup
+Provides-Extra: test
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6c0978d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,113 @@
+# Hydrilla (Python implementation)
+
+This is the repository of Python incarnation of [Hydrilla](https://hydrillabugs.koszko.org/projects/hydrilla/wiki), a repository software to serve [Haketilo](https://hydrillabugs.koszko.org/projects/haketilo/wiki) packages.
+
+The information below is meant to help hack on the codebase. If you're instead looking for some noob-friendly documentation, see the [user manual](https://hydrillabugs.koszko.org/projects/hydrilla/wiki/User_manual).
+
+## Dependencies
+
+### Runtime
+
+* Python3 (>= 3.7)
+* [hydrilla.builder](https://git.koszko.org/hydrilla-builder/)
+* flask
+* click
+* jsonschema (>= 3.0)
+
+### Build
+
+* setuptools
+* wheel
+* setuptools_scm
+* babel
+
+### Test
+
+* pytest
+* reuse
+
+## Building
+
+We're using setuptools. You can build a wheel under `dist/` with
+``` shell
+python3 -m build
+```
+Optionally, add a `--no-isolation` option to the second command to have it use system packages where possible instead of downloading all dependencies from PyPI.
+
+The generated .whl file can then be used to install Hydrilla either globally or in the current Python virtualenv:
+```shell
+python3 -m pip install dist/put_the_name_of_generated_file_here.whl
+```
+
+### PyPI considerations
+
+Commands like `python3 -m build` and `python3 -m pip` but also `virtualenv` will by default download the dependencies from PyPI repository[^pypi]. Although this is what many people want, it carries along a freedom issue. PyPI is not committed to only hosting libre software packages[^pypi_freeware] and, like any platform allowing upload of code by the public, has lower package standards than repositories of many operating system distributions. For this reason you are encouraged to use the dependencies as provided by your distribution.
+
+To perform the build and installation without PyPI, first install all dependencies system-wide. For example, in Debian-based distributions (including Trisquel):
+``` shell
+sudo apt install python3-flask python3-flask python3-jsonschema \
+     python3-setuptools python3-setuptools-scm python3-babel python3-wheel
+```
+
+Then, block programs you're about to spawn from accessing https://pypi.org. If running on a GNU/Linux system you can utilize Linux user namespaces:
+``` shell
+unshare -Urn
+```
+
+The above will put you in a network-isolated shell. If you're using a virtualenv, activate it **after** the `unshare` command.
+
+Now, in unpacked source directories of **both** `hydrilla-builder` and `hydrilla`, run the build and installation commands:
+``` shell
+python3 -m build --no-isolation
+python3 -m pip install dist/hydrilla*.whl # or use the full file name
+```
+
+[^pypi]: [https://pypi.org/](https://pypi.org/)
+[^pypi_freeware]: [https://pypi.org/search/?c=License+%3A%3A+Freeware](https://pypi.org/search/?c=License+%3A%3A+Freeware)
+
+## Testing
+
+For tests to pass you need compiled message catalogs to be present. If you've performed the build at least once, they're already there. Otherwise, you need to run `./setup.py compile_catalog`. Then you can run the actual tests:
+``` shell
+python3 -m pytest
+```
+
+## Running
+
+### Hydrilla command
+
+Hydrilla includes a `hydrilla` shell command that can be used to quickly and easily spawn a local instance, e.g.:
+```
+hydrilla -m /path/to/where/package/files/to/serve/are/stored -p 10112
+```
+This will cause the resources from provided path to be served at [http://127.0.0.1:10112/](http://127.0.0.1:10112/).
+
+The actual packages to serve are made using [Hydrilla builder](https://git.koszko.org/hydrilla-builder/).
+
+For more information about available options, pass the `--help` flag to `hydrilla` command:
+``` shell
+hydrilla --help
+```
+
+If you navigate your POSIX shell to Hydrilla sources directory, you can also consult the included manpage (`man` tool required):
+``` shell
+man ./doc/man/man1/hydrilla.1
+```
+
+Last but not least, you might find it useful to consult the default, internal configuration file of Hydrilla that resides under `src/hydrilla/server/config.json` in the sources repository.
+
+### WSGI
+
+If you want to test a more production-suitable deployment option, consult sample Apache2 config files and a WSGI script supplied in `doc/examples` directory.
+
+## Copying
+
+Hydrilla is Copyright (C) 2021-2022 Wojtek Kosior and contributors, entirely available under the GNU Affero General Public License version 3 or later. Some files might also give you broader permissions, see comments inside them.
+
+*I, Wojtek Kosior, thereby promise not to sue for violation of this project's license. Although I request that you do not make use this code in a proprietary program, I am not going to enforce this in court.*
+
+## Contributing
+
+Please visit our Redmine instance at https://hydrillabugs.koszko.org.
+
+You can also write an email to koszko@koszko.org.
diff --git a/README.md.license b/README.md.license
new file mode 100644
index 0000000..baf2b81
--- /dev/null
+++ b/README.md.license
@@ -0,0 +1,5 @@
+SPDX-License-Identifier: CC0-1.0
+
+Copyright (C) 2022 Wojtek Kosior
+
+Available under the terms of Creative Commons Zero v1.0 Universal.
diff --git a/babel.cfg b/babel.cfg
new file mode 100644
index 0000000..b7c2ea3
--- /dev/null
+++ b/babel.cfg
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+[python: **.py]
+[jinja2: **.html]
diff --git a/doc/examples/hydrilla.example.com.conf b/doc/examples/hydrilla.example.com.conf
new file mode 100644
index 0000000..c1450f1
--- /dev/null
+++ b/doc/examples/hydrilla.example.com.conf
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Sample Apache2 configuration file for Hydrilla server (over unencrypted HTTP).
+#
+# Copyright (C) 2022 Wojtek Kosior
+
+
+# Please adapt this file according to your needs can place it file under
+# Apache2's available site configs directory which will be
+# /etc/apache2/sites-available/ or similar. Then, enable it using the following
+# command:
+#    a2ensite hydrilla.example.com
+# You also need to install and enable the wsgi module for Apache if you haven't
+# already (e.g. with libapache2-mod-wsgi-py3 Debian package).
+# The new configuration will only take effect after you restart/reload Apache2
+# daemon.
+
+# Keep in mind that due to some external limitations Haketilo will not connect
+# to HTTP Hydrilla servers running elsewhere than localhost. To get a working
+# public Hydrilla server you should obtain a TLS certificate and use the
+# attached hydrilla.example.com.tls.conf file instead of this one.
+
+# This configuration file assumes Hydrilla is installed under Python's default
+# load path and that the attached hydrilla.wsgi sample script has been saved as
+# /var/lib/hydrilla/wsgi/hydrilla.wsgi
+
+<VirtualHost *:80>
+  ServerName hydrilla.example.com
+  ServerAdmin admin@example.com
+
+  DocumentRoot /var/lib/hydrilla/malcontent
+
+  <Directory /var/lib/hydrilla/malcontent >
+    <IfVersion < 2.4>
+      Order allow,deny
+      Allow from all
+    </IfVersion>
+    <IfVersion >= 2.4>
+      Require all granted
+    </IfVersion>
+  </Directory>
+
+  <Directory ~ "^/var/lib/hydrilla/malcontent/(resource|mapping)/" >
+    ForceType application/json
+  </Directory>
+
+  # Make Apache2 automatically pick up the new version of the wsgi script when
+  # it gets written. This line will fail if you don't have mod_wsgi installed
+  # and enabled.
+  WSGIScriptReloading On
+
+  # The default configuration of mod_wsgi on most *nix systems is to run wsgi
+  # scripts in so-called embedded mode. The following 2 lines instruct Apache to
+  # instead run our wsgi script in a daemon process which makes it more flexible
+  # and reliable. Here we also set environment variables that are needed to tell
+  # Python that the system supports UTF-8 encoding.
+  # Feel free to modify the arguments to WSGIDaemonProcess according to your
+  # needs:
+  # https://modwsgi.readthedocs.io/en/develop/user-guides/quick-configuration-guide.html#delegation-to-daemon-process
+  WSGIDaemonProcess hydrilla.example.com lang='C.UTF-8' locale='C.UTF-8'
+  WSGIProcessGroup hydrilla.example.com
+
+  <Directory /var/lib/hydrilla/wsgi >
+    <IfVersion < 2.4>
+      Order allow,deny
+      Allow from all
+    </IfVersion>
+    <IfVersion >= 2.4>
+      Require all granted
+    </IfVersion>
+  </Directory>
+
+  WSGIScriptAliasMatch "^/((resource|mapping)/[^/]+[.]json|query)$" "/var/lib/hydrilla/wsgi/hydrilla.wsgi/$1"
+
+  ErrorLog ${APACHE_LOG_DIR}/error.log
+  CustomLog ${APACHE_LOG_DIR}/access.log combined
+</VirtualHost>
diff --git a/doc/examples/hydrilla.example.com.tls.conf b/doc/examples/hydrilla.example.com.tls.conf
new file mode 100644
index 0000000..357ecb3
--- /dev/null
+++ b/doc/examples/hydrilla.example.com.tls.conf
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Sample Apache2 configuration file for Hydrilla server (over HTTPS).
+#
+# Copyright (C) 2022 Wojtek Kosior
+
+
+# Please adapt this file according to your needs can place it file under
+# Apache2's available site configs directory which will be
+# /etc/apache2/sites-available/ or similar. Then, enable it using the following
+# command:
+#    a2ensite hydrilla.example.com.tls
+# You also need to install and enable the wsgi module for Apache if you haven't
+# already (e.g. with libapache2-mod-wsgi-py3 Debian package).
+# The new configuration will only take effect after you restart/reload Apache2
+# daemon.
+
+# The following configuration enables TLS encryption. If you want to run a local
+# Hydrilla server utilizing plain HTTP, use the attached
+# hydrilla.example.com.conf file instead of this one or run a standalone
+# development server using the hydrilla command.
+
+# This configuration file assumes Hydrilla is installed under Python's default
+# load path and that the attached hydrilla.wsgi sample script has been saved as
+# /var/lib/hydrilla/wsgi/hydrilla.wsgi
+
+<VirtualHost *:80>
+  ServerName hydrilla.example.com
+
+  Redirect permanent / https://hydrilla.example.com/
+
+  ErrorLog ${APACHE_LOG_DIR}/error.log
+  CustomLog ${APACHE_LOG_DIR}/access.log combined
+</VirtualHost>
+
+<IfModule mod_ssl.c>
+  <VirtualHost _default_:443>
+    ServerName hydrilla.example.com
+    ServerAdmin admin@example.com
+
+    DocumentRoot /var/lib/hydrilla/malcontent
+
+    <Directory /var/lib/hydrilla/malcontent >
+      <IfVersion < 2.4>
+        Order allow,deny
+        Allow from all
+      </IfVersion>
+      <IfVersion >= 2.4>
+        Require all granted
+      </IfVersion>
+    </Directory>
+
+    <Directory ~ "^/var/lib/hydrilla/malcontent/(resource|mapping)/" >
+      ForceType application/json
+    </Directory>
+
+    # Make Apache2 automatically pick up the new version of the wsgi script when
+    # it gets written. This line will fail if you don't have mod_wsgi installed
+    # and enabled.
+    WSGIScriptReloading On
+
+    # The default configuration of mod_wsgi on most *nix systems is to run wsgi
+    # scripts in so-called embedded mode. The following 2 lines instruct Apache
+    # to instead run our wsgi script in a daemon process which makes it more
+    # flexible and reliable. Here we also set environment variables that are
+    # needed to tell Python that the system supports UTF-8 encoding.
+    # Feel free to modify the arguments to WSGIDaemonProcess according to your
+    # needs:
+    # https://modwsgi.readthedocs.io/en/develop/user-guides/quick-configuration-guide.html#delegation-to-daemon-process
+    WSGIDaemonProcess hydrilla.example.com lang='C.UTF-8' locale='C.UTF-8'
+    WSGIProcessGroup hydrilla.example.com
+
+    <Directory /var/lib/hydrilla/wsgi >
+      <IfVersion < 2.4>
+        Order allow,deny
+        Allow from all
+      </IfVersion>
+      <IfVersion >= 2.4>
+        Require all granted
+      </IfVersion>
+    </Directory>
+
+    WSGIScriptAliasMatch "^/((resource|mapping)/[^/]+[.]json|query)$" "/var/lib/hydrilla/wsgi/hydrilla.wsgi/$1"
+
+    ErrorLog ${APACHE_LOG_DIR}/error.log
+    CustomLog ${APACHE_LOG_DIR}/access.log combined
+
+    # Change the paths to point to your actual certificate files.
+    SSLEngine on
+    SSLCertificateFile          /etc/letsencrypt/live/example.com/cert.pem
+    SSLCertificateKeyFile       /etc/letsencrypt/live/example.com/privkey.pem
+    SSLCertificateChainFile     /etc/letsencrypt/live/example.com/chain.pem
+  </VirtualHost>
+</IfModule>
diff --git a/doc/examples/hydrilla.wsgi b/doc/examples/hydrilla.wsgi
new file mode 100644
index 0000000..70dd895
--- /dev/null
+++ b/doc/examples/hydrilla.wsgi
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+# SPDX-License-Identifier: CC0-1.0
+
+# Sample WSGI script for Hydrilla server.
+#
+# Copyright (C) 2022 Wojtek Kosior
+
+# Uncomment the lines below if you want to use a virtualenv installation of
+# Hydrilla.
+
+#from pathlib import Path
+#path = Path('/path/to/virtualenv/bin/activate_this.py')
+#exec(path.read_text(), {'__file__': str(path)})
+
+from hydrilla.server import start_wsgi
+
+# The following line will initialize Hydrilla with the default, internal
+# configuration while also attempting to load /etc/hydrilla/config.json if it's
+# present.
+application = start_wsgi(standalone_mode=False)
+
+# Comment the above and uncomment this to use a different config file.
+
+#from hydrilla.server import config
+#application = start_wsgi(standalone_mode=False,
+#                         obj=config.load(['/path/to/config.json']))
diff --git a/doc/man/man1/hydrilla.1 b/doc/man/man1/hydrilla.1
new file mode 100644
index 0000000..c71428c
--- /dev/null
+++ b/doc/man/man1/hydrilla.1
@@ -0,0 +1,137 @@
+.\" SPDX-License-Identifier: CC0-1.0
+.\"
+.\" Man page for Hydrilla server.
+.\"
+.\" Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+.\"
+.\" Available under the terms of Creative Commons Zero v1.0 Universal.
+
+.TH HYDRILLA 1 2022-04-22 "Hydrilla 1.0" "Hydrilla Manual"
+
+.SH NAME
+hydrilla \- Serve packages for the Haketilo browser extension
+
+.SH SYNOPSIS
+.B "hydrilla \-\-help"
+.br
+.B "hydrilla [\-m \fIDIRECTORY\/\fP] [\-h\ \fIURL\/\fP]"
+.B "[\-p\ \fIPORT\/\fP] [\-l \fILANGUAGE\/\fP]"
+.br
+.B "         [\-c \fICONFIG\/\fP]"
+.br
+(See the OPTIONS section for alternate option syntax with long option
+names.)
+
+.SH DESCRIPTION
+.I hydrilla
+is a command to start the Hydrilla repository software that serves Haketilo
+packages over HTTP.
+
+The primary method of running Hydrilla server is through a WSGI script.
+.I hydrilla
+command should only be used in local or development deployments.
+
+.SH OPTIONS
+.TP
+.B \-\^\-help
+Output a usage message and exit.
+
+.TP
+.BI \-m " DIRECTORY" "\fR,\fP \-\^\-malcontent\-dir=" DIRECTORY
+Look inside
+.I DIRECTORY
+for package files to serve. Use of the word \*(lqmalcontent\*(rq is a
+pun on widespread use of word
+.UR https://www.gnu.org/philosophy/words-to-avoid.en.html#Content
+\*(lqcontent\*(rq
+.UE
+with regard to works published online.
+
+This option, if present, overrides the property \*(lqmalcontent_dir\*(rq from Hydrilla config file. If the value is not specified on the command line nor in the config file, it defaults to \%\*(lq/var/lib/hydrilla/malcontent\*(rq.
+
+.TP
+.BI \-h " URL" "\fR,\fP \-\^\-hydrilla\-project\-url=" URL
+Use
+.I URL
+when placing a link to Hydrilla website in served HTML pages.
+
+This option, if present, overrides the property \*(lqhydrilla_project_url\*(rq from Hydrilla config file. If the value is not specified on the command line nor in the config file, it defaults to \%\*(lqhttps://hydrillabugs.koszko.org/projects/hydrilla/wiki\*(rq.
+
+.TP
+.BI \-p " PORT" "\fR,\fP \-\^\-port=" PORT
+Run the Hydrilla HTTP server on port
+.IR PORT .
+If
+.I PORT
+is 0, let
+.I hydrilla
+choose a random free port on the machine.
+
+This option, if present, overrides the property \*(lqport\*(rq from Hydrilla config file. If the value is not specified on the command line nor in the config file, it defaults to 10112.
+
+.TP
+.BI  \-l " LANGUAGE" "\fR,\fP \-\^\-language=" LANGUAGE
+Generate all user messages (including those on served HTML pages) using
+locale
+.IR LANGUAGE .
+
+.I LANGUAGE
+should be one of the locales supported by
+.IR hydrilla ,
+e.g. \*(lqen_US\*(rq.
+Otherwise,
+.I hydrilla
+will silently fall back to the en_US locale.
+
+This option, if present, overrides the property \*(lqlanguage\*(rq from Hydrilla config file. If the value is not specified on the command line nor in the config file, it defaults to \*(lqen_US\*(rq.
+
+.TP
+.BI \-c " CONFIG" "\fR,\fP \-\^\-config=" CONFIG
+Process the file at
+.I CONFIG
+as Hydrilla config file.
+.I CONFIG
+must exist in the filesystem and be readable to
+.IR hydrilla .
+
+If this option is not given,
+.I hydrilla
+loads its own, internal config file that in turn tries to load
+\%/etc/hydrilla/config.json.
+
+.TP
+.B \-\^\-version
+Show version information for this instance of
+.I hydrilla
+on the standard output and exit successfully.
+
+.SH "EXIT STATUS"
+The exit status is 0 if the server was started successfully and terminated
+manually by the user (i.e. through delivery of a SIGINT signal) or if the
+.B \-\^\-help
+option was passed. It is a number different from 0 if the server failed to
+start.
+Possible causes include
+.\"
+invalid command line arguments,
+.\"
+broken packages inside the provided
+.I DIRECTORY
+(may instead generate a warning message depending on the \*(lqwerror\*(rq
+config file option),
+.\"
+insufficient privileges to use the specified
+.I PORT
+and
+.\"
+invalid or unreadable config file.
+
+.SH "SEE ALSO"
+.SS "Manual Pages"
+.BR hydrilla-builder (1).
+
+.SS "Full Documentation"
+.UR https://hydrillabugs.koszko.org/projects/hydrilla/wiki
+Online documentation
+.UE
+is available on Hydrilla issue tracker.
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..623201c
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = ["setuptools>=44", "wheel", "setuptools_scm>=5.0", "babel"]
+
+[tool.setuptools_scm]
+write_to = "src/hydrilla/server/_version.py"
+
+[tool.pytest.ini_options]
+minversion = "6.0"
+addopts = "-ra -q"
+testpaths = [
+    "tests"
+]
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..b4ea538
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Disable deprecation warnings from third-party libraries
+#
+# Copyright (C) 2021 Wojtek Kosior
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+[pytest]
+filterwarnings =
+    ignore::DeprecationWarning:werkzeug.*:
+    ignore::DeprecationWarning:jinja2.*:
+
+markers =
+    mod_before_build: define a callback to use to modify test packages before their build
+    mod_after_build: define a callback to use to modify test packages after their build
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..db1428f
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,81 @@
+[metadata]
+name = hydrilla
+author = Wojtek Kosior
+author_email = koszko@koszko.org
+description = Hydrilla repository server
+long_description = file: README.md
+long_description_content_type = text/markdown
+url = https://git.koszko.org/pydrilla
+project_urls = 
+	Bug Tracker = https://hydrillabugs.koszko.org/projects/hydrilla
+keywords = hydrilla, haketilo
+license = AGPL-3.0-or-later
+classifiers = 
+	Development Status :: 4 - Beta
+	Intended Audience :: Developers
+	Environment :: Web Environment
+	Environment :: Console
+	Topic :: Internet :: WWW/HTTP :: WSGI
+	License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+	Natural Language :: English
+	Operating System :: OS Independent
+	Programming Language :: Python :: 3 :: Only
+
+[options]
+zip_safe = False
+package_dir = 
+	= src
+packages = find:
+include_package_data = True
+python_requires = >= 3.7
+install_requires = 
+	hydrilla.builder==1.0
+	flask
+	jsonschema>=3.0
+
+[options.package_data]
+hydrilla.server = locales/*/LC_MESSAGES/hydrilla-messages.mo
+
+[options.extras_require]
+test = pytest
+setup = setuptools_scm
+
+[options.packages.find]
+where = src
+exclude = 
+	test
+
+[options.entry_points]
+console_scripts = 
+	hydrilla = hydrilla.server:start
+
+[extract_messages]
+mapping_file = babel.cfg
+keywords = _ f_
+add_comments = TRANSLATORS:
+width = 80
+input_dirs = src/hydrilla
+output_file = src/hydrilla/server/locales/hydrilla-messages.pot
+msgid_bugs_address = koszko@koszko.org
+sort_by_file = True
+copyright_holder = Wojtek Kosior <koszko@koszko.org>
+
+[init_catalog]
+input_file = src/hydrilla/server/locales/hydrilla-messages.pot
+output_dir = src/hydrilla/server/locales/
+domain = hydrilla-messages
+
+[update_catalog]
+input_file = src/hydrilla/server/locales/hydrilla-messages.pot
+output_dir = src/hydrilla/server/locales/
+domain = hydrilla-messages
+
+[compile_catalog]
+directory = src/hydrilla/server/locales
+use_fuzzy = True
+domain = hydrilla-messages
+
+[egg_info]
+tag_build = 
+tag_date = 0
+
diff --git a/setup.py b/setup.py
new file mode 100755
index 0000000..345febc
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+import setuptools
+
+from setuptools.command.build_py import build_py
+
+class CustomBuildCommand(build_py):
+    '''
+    The build command but runs babel before build.
+    '''
+    def run(self, *args, **kwargs):
+        self.run_command('compile_catalog')
+        super().run(*args, **kwargs)
+
+setuptools.setup(cmdclass={'build_py': CustomBuildCommand})
diff --git a/src/hydrilla.egg-info/PKG-INFO b/src/hydrilla.egg-info/PKG-INFO
new file mode 100644
index 0000000..dc23bac
--- /dev/null
+++ b/src/hydrilla.egg-info/PKG-INFO
@@ -0,0 +1,138 @@
+Metadata-Version: 2.1
+Name: hydrilla
+Version: 1.0
+Summary: Hydrilla repository server
+Home-page: https://git.koszko.org/pydrilla
+Author: Wojtek Kosior
+Author-email: koszko@koszko.org
+License: AGPL-3.0-or-later
+Project-URL: Bug Tracker, https://hydrillabugs.koszko.org/projects/hydrilla
+Description: # Hydrilla (Python implementation)
+        
+        This is the repository of Python incarnation of [Hydrilla](https://hydrillabugs.koszko.org/projects/hydrilla/wiki), a repository software to serve [Haketilo](https://hydrillabugs.koszko.org/projects/haketilo/wiki) packages.
+        
+        The information below is meant to help hack on the codebase. If you're instead looking for some noob-friendly documentation, see the [user manual](https://hydrillabugs.koszko.org/projects/hydrilla/wiki/User_manual).
+        
+        ## Dependencies
+        
+        ### Runtime
+        
+        * Python3 (>= 3.7)
+        * [hydrilla.builder](https://git.koszko.org/hydrilla-builder/)
+        * flask
+        * click
+        * jsonschema (>= 3.0)
+        
+        ### Build
+        
+        * setuptools
+        * wheel
+        * setuptools_scm
+        * babel
+        
+        ### Test
+        
+        * pytest
+        * reuse
+        
+        ## Building
+        
+        We're using setuptools. You can build a wheel under `dist/` with
+        ``` shell
+        python3 -m build
+        ```
+        Optionally, add a `--no-isolation` option to the second command to have it use system packages where possible instead of downloading all dependencies from PyPI.
+        
+        The generated .whl file can then be used to install Hydrilla either globally or in the current Python virtualenv:
+        ```shell
+        python3 -m pip install dist/put_the_name_of_generated_file_here.whl
+        ```
+        
+        ### PyPI considerations
+        
+        Commands like `python3 -m build` and `python3 -m pip` but also `virtualenv` will by default download the dependencies from PyPI repository[^pypi]. Although this is what many people want, it carries along a freedom issue. PyPI is not committed to only hosting libre software packages[^pypi_freeware] and, like any platform allowing upload of code by the public, has lower package standards than repositories of many operating system distributions. For this reason you are encouraged to use the dependencies as provided by your distribution.
+        
+        To perform the build and installation without PyPI, first install all dependencies system-wide. For example, in Debian-based distributions (including Trisquel):
+        ``` shell
+        sudo apt install python3-flask python3-flask python3-jsonschema \
+             python3-setuptools python3-setuptools-scm python3-babel python3-wheel
+        ```
+        
+        Then, block programs you're about to spawn from accessing https://pypi.org. If running on a GNU/Linux system you can utilize Linux user namespaces:
+        ``` shell
+        unshare -Urn
+        ```
+        
+        The above will put you in a network-isolated shell. If you're using a virtualenv, activate it **after** the `unshare` command.
+        
+        Now, in unpacked source directories of **both** `hydrilla-builder` and `hydrilla`, run the build and installation commands:
+        ``` shell
+        python3 -m build --no-isolation
+        python3 -m pip install dist/hydrilla*.whl # or use the full file name
+        ```
+        
+        [^pypi]: [https://pypi.org/](https://pypi.org/)
+        [^pypi_freeware]: [https://pypi.org/search/?c=License+%3A%3A+Freeware](https://pypi.org/search/?c=License+%3A%3A+Freeware)
+        
+        ## Testing
+        
+        For tests to pass you need compiled message catalogs to be present. If you've performed the build at least once, they're already there. Otherwise, you need to run `./setup.py compile_catalog`. Then you can run the actual tests:
+        ``` shell
+        python3 -m pytest
+        ```
+        
+        ## Running
+        
+        ### Hydrilla command
+        
+        Hydrilla includes a `hydrilla` shell command that can be used to quickly and easily spawn a local instance, e.g.:
+        ```
+        hydrilla -m /path/to/where/package/files/to/serve/are/stored -p 10112
+        ```
+        This will cause the resources from provided path to be served at [http://127.0.0.1:10112/](http://127.0.0.1:10112/).
+        
+        The actual packages to serve are made using [Hydrilla builder](https://git.koszko.org/hydrilla-builder/).
+        
+        For more information about available options, pass the `--help` flag to `hydrilla` command:
+        ``` shell
+        hydrilla --help
+        ```
+        
+        If you navigate your POSIX shell to Hydrilla sources directory, you can also consult the included manpage (`man` tool required):
+        ``` shell
+        man ./doc/man/man1/hydrilla.1
+        ```
+        
+        Last but not least, you might find it useful to consult the default, internal configuration file of Hydrilla that resides under `src/hydrilla/server/config.json` in the sources repository.
+        
+        ### WSGI
+        
+        If you want to test a more production-suitable deployment option, consult sample Apache2 config files and a WSGI script supplied in `doc/examples` directory.
+        
+        ## Copying
+        
+        Hydrilla is Copyright (C) 2021-2022 Wojtek Kosior and contributors, entirely available under the GNU Affero General Public License version 3 or later. Some files might also give you broader permissions, see comments inside them.
+        
+        *I, Wojtek Kosior, thereby promise not to sue for violation of this project's license. Although I request that you do not make use this code in a proprietary program, I am not going to enforce this in court.*
+        
+        ## Contributing
+        
+        Please visit our Redmine instance at https://hydrillabugs.koszko.org.
+        
+        You can also write an email to koszko@koszko.org.
+        
+Keywords: hydrilla,haketilo
+Platform: UNKNOWN
+Classifier: Development Status :: 4 - Beta
+Classifier: Intended Audience :: Developers
+Classifier: Environment :: Web Environment
+Classifier: Environment :: Console
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI
+Classifier: License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+Classifier: Natural Language :: English
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 3 :: Only
+Requires-Python: >=3.7
+Description-Content-Type: text/markdown
+Provides-Extra: setup
+Provides-Extra: test
diff --git a/src/hydrilla.egg-info/SOURCES.txt b/src/hydrilla.egg-info/SOURCES.txt
new file mode 100644
index 0000000..461f1fc
--- /dev/null
+++ b/src/hydrilla.egg-info/SOURCES.txt
@@ -0,0 +1,46 @@
+COPYING
+MANIFEST.in
+README.md
+README.md.license
+babel.cfg
+pyproject.toml
+pytest.ini
+setup.cfg
+setup.py
+.reuse/dep5
+LICENSES/0BSD.txt
+LICENSES/AGPL-3.0-or-later.txt
+LICENSES/CC-BY-SA-4.0.txt
+LICENSES/CC0-1.0.txt
+doc/examples/hydrilla.example.com.conf
+doc/examples/hydrilla.example.com.tls.conf
+doc/examples/hydrilla.wsgi
+doc/man/man1/hydrilla.1
+src/hydrilla/__init__.py
+src/hydrilla.egg-info/PKG-INFO
+src/hydrilla.egg-info/SOURCES.txt
+src/hydrilla.egg-info/dependency_links.txt
+src/hydrilla.egg-info/entry_points.txt
+src/hydrilla.egg-info/not-zip-safe
+src/hydrilla.egg-info/requires.txt
+src/hydrilla.egg-info/top_level.txt
+src/hydrilla/server/__init__.py
+src/hydrilla/server/__main__.py
+src/hydrilla/server/_version.py
+src/hydrilla/server/config.json
+src/hydrilla/server/config.py
+src/hydrilla/server/serve.py
+src/hydrilla/server/locales/en_US/LC_MESSAGES/hydrilla-messages.po
+src/hydrilla/server/templates/base.html
+src/hydrilla/server/templates/index.html
+tests/__init__.py
+tests/config.json
+tests/test_server.py
+tests/source-package-example/README.txt
+tests/source-package-example/README.txt.license
+tests/source-package-example/bye.js
+tests/source-package-example/hello.js
+tests/source-package-example/index.json
+tests/source-package-example/message.js
+tests/source-package-example/.reuse/dep5
+tests/source-package-example/LICENSES/CC0-1.0.txt
\ No newline at end of file
diff --git a/src/hydrilla.egg-info/dependency_links.txt b/src/hydrilla.egg-info/dependency_links.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/hydrilla.egg-info/dependency_links.txt
@@ -0,0 +1 @@
+
diff --git a/src/hydrilla.egg-info/entry_points.txt b/src/hydrilla.egg-info/entry_points.txt
new file mode 100644
index 0000000..88610fe
--- /dev/null
+++ b/src/hydrilla.egg-info/entry_points.txt
@@ -0,0 +1,3 @@
+[console_scripts]
+hydrilla = hydrilla.server:start
+
diff --git a/src/hydrilla.egg-info/not-zip-safe b/src/hydrilla.egg-info/not-zip-safe
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/hydrilla.egg-info/not-zip-safe
@@ -0,0 +1 @@
+
diff --git a/src/hydrilla.egg-info/requires.txt b/src/hydrilla.egg-info/requires.txt
new file mode 100644
index 0000000..026f10d
--- /dev/null
+++ b/src/hydrilla.egg-info/requires.txt
@@ -0,0 +1,9 @@
+flask
+hydrilla.builder==1.0
+jsonschema>=3.0
+
+[setup]
+setuptools_scm
+
+[test]
+pytest
diff --git a/src/hydrilla.egg-info/top_level.txt b/src/hydrilla.egg-info/top_level.txt
new file mode 100644
index 0000000..85c40e2
--- /dev/null
+++ b/src/hydrilla.egg-info/top_level.txt
@@ -0,0 +1 @@
+hydrilla
diff --git a/src/hydrilla/__init__.py b/src/hydrilla/__init__.py
new file mode 100644
index 0000000..6aeb276
--- /dev/null
+++ b/src/hydrilla/__init__.py
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: 0BSD
+
+# Copyright (C) 2013-2020, PyPA
+
+# https://packaging.python.org/en/latest/guides/packaging-namespace-packages/#pkgutil-style-namespace-packages
+
+__path__ = __import__('pkgutil').extend_path(__path__, __name__)
diff --git a/src/hydrilla/server/__init__.py b/src/hydrilla/server/__init__.py
new file mode 100644
index 0000000..7bd71ea
--- /dev/null
+++ b/src/hydrilla/server/__init__.py
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+from . import config
+from .serve import start, start_wsgi
diff --git a/src/hydrilla/server/__main__.py b/src/hydrilla/server/__main__.py
new file mode 100644
index 0000000..037b388
--- /dev/null
+++ b/src/hydrilla/server/__main__.py
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+
+from . import serve
+
+serve.start()
diff --git a/src/hydrilla/server/_version.py b/src/hydrilla/server/_version.py
new file mode 100644
index 0000000..d953eef
--- /dev/null
+++ b/src/hydrilla/server/_version.py
@@ -0,0 +1,5 @@
+# coding: utf-8
+# file generated by setuptools_scm
+# don't change, don't track in version control
+version = '1.0'
+version_tuple = (1, 0)
diff --git a/src/hydrilla/server/config.json b/src/hydrilla/server/config.json
new file mode 100644
index 0000000..bde341c
--- /dev/null
+++ b/src/hydrilla/server/config.json
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Default Hydrilla config file.
+//
+// Copyright (C) 2021, 2022 Wojtek Kosior
+//
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+{
+    // Relative path to directory from which Hydrilla will load packages
+    // metadata and serve files.
+    // Deliberately avoiding word "content", see:
+    // http://www.gnu.org/philosophy/words-to-avoid.en.html#Content
+    "malcontent_dir": "/var/lib/hydrilla/malcontent",
+
+    // Hydrilla will display this link to users as a place where they can
+    // obtain sources for its software. This config option is meant to ease
+    // compliance with the AGPL.
+    "hydrilla_project_url": "https://hydrillabugs.koszko.org/projects/hydrilla/wiki",
+
+    // Tell Hydrilla to look for additional configuration in those files, in
+    // this order. Raise an error if the file does not exist.
+    //"use_configs": ["/etc/hydrilla/config.json"],
+
+    // Same as above but don't raise an error if the file does not exist.
+    "try_configs": ["/etc/hydrilla/config.json"],
+
+    // What port to listen on (if not being run through WSGI).
+    "port": 10112,
+
+    // What localization to use for console messages and served HTML files.
+    "language": "en_US",
+
+    // Whether to exit upon emitting a warning.
+    "werror": false
+}
diff --git a/src/hydrilla/server/config.py b/src/hydrilla/server/config.py
new file mode 100644
index 0000000..1edd070
--- /dev/null
+++ b/src/hydrilla/server/config.py
@@ -0,0 +1,117 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Loading Hydrilla server configuration file.
+#
+# This file is part of Hydrilla
+#
+# Copyright (C) 2022 Wojtek Kosior
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+#
+# I, Wojtek Kosior, thereby promise not to sue for violation of this
+# file's license. Although I request that you do not make use this code
+# in a proprietary program, I am not going to enforce this in court.
+
+# Enable using with Python 3.7.
+from __future__ import annotations
+
+import json
+
+from pathlib import Path
+
+import jsonschema
+
+from .. import util
+
+config_schema = {
+    '$schema': 'http://json-schema.org/draft-07/schema#',
+    'type': 'object',
+    'properties': {
+        'malcontent_dir': {
+            'type': 'string'
+        },
+        'malcontent_dir': {
+            'type': 'string'
+        },
+        'hydrilla_project_url': {
+            'type': 'string'
+        },
+        'try_configs': {
+            'type': 'array',
+            'items': {
+                'type': 'string'
+            }
+        },
+        'use_configs': {
+            'type': 'array',
+            'items': {
+                'type': 'string'
+            }
+        },
+        'port': {
+            'type': 'integer',
+            'minimum': 0,
+            'maximum': 65535
+        },
+        'werror': {
+            'type': 'boolean'
+        }
+    }
+}
+
+here = Path(__file__).resolve().parent
+
+def load(config_paths: list[Path]=[here / 'config.json'],
+         can_fail: list[bool]=[]) -> dict:
+    config = {}
+
+    bools_missing = max(0, len(config_paths) - len(can_fail))
+    config_paths = [*config_paths]
+    can_fail = [*can_fail[:len(config_paths)], *([False] * bools_missing)]
+
+    while config_paths:
+        path = config_paths.pop()
+        fail_ok = can_fail.pop()
+
+        try:
+            json_text = path.read_text()
+        except Exception as e:
+            if fail_ok:
+                continue
+            raise e from None
+
+        new_config = json.loads(util.strip_json_comments(json_text))
+        jsonschema.validate(new_config, config_schema)
+
+        config.update(new_config)
+
+        if 'malcontent_dir' in config:
+            malcontent_dir = Path(config['malcontent_dir'])
+            if not malcontent_dir.is_absolute():
+                malcontent_dir = path.parent / malcontent_dir
+
+        config['malcontent_dir'] = str(malcontent_dir.resolve())
+
+        for key, failure_ok in [('try_configs', True), ('use_configs', False)]:
+            paths = new_config.get(key, [])
+            paths.reverse()
+            config_paths.extend(paths)
+            can_fail.extend([failure_ok] * len(paths))
+
+    for key in ('try_configs', 'use_configs'):
+        if key in config:
+            config.pop(key)
+
+    return config
diff --git a/src/hydrilla/server/locales/en_US/LC_MESSAGES/hydrilla-messages.po b/src/hydrilla/server/locales/en_US/LC_MESSAGES/hydrilla-messages.po
new file mode 100644
index 0000000..7ea930a
--- /dev/null
+++ b/src/hydrilla/server/locales/en_US/LC_MESSAGES/hydrilla-messages.po
@@ -0,0 +1,147 @@
+# SPDX-License-Identifier: CC0-1.0
+#
+# English (United States) translations for hydrilla.
+# Copyright (C) 2021, 2022 Wojtek Kosior <koszko@koszko.org>
+# Available under the terms of Creative Commons Zero v1.0 Universal.
+msgid ""
+msgstr ""
+"Project-Id-Version: hydrilla.builder 0.1\n"
+"Report-Msgid-Bugs-To: koszko@koszko.org\n"
+"POT-Creation-Date: 2022-04-22 17:09+0200\n"
+"PO-Revision-Date: 2022-02-12 00:00+0000\n"
+"Last-Translator: Wojtek Kosior <koszko@koszko.org>\n"
+"Language: en_US\n"
+"Language-Team: en_US <koszko@koszko.org>\n"
+"Plural-Forms: nplurals=2; plural=(n != 1)\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=utf-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Babel 2.8.0\n"
+
+#: src/hydrilla/server/serve.py:122
+#, python-brace-format
+msgid "uuid_mismatch_{identifier}"
+msgstr "Two different uuids were specified for item '{identifier}'."
+
+#: src/hydrilla/server/serve.py:129
+#, python-brace-format
+msgid "version_clash_{identifier}_{version}"
+msgstr "Version '{version}' specified more than once for item '{identifier}'."
+
+#: src/hydrilla/server/serve.py:245 src/hydrilla/server/serve.py:257
+msgid "invalid_URL_{}"
+msgstr "Invalid URL/pattern: '{}'."
+
+#: src/hydrilla/server/serve.py:249
+msgid "disallowed_protocol_{}"
+msgstr "Disallowed protocol: '{}'."
+
+#: src/hydrilla/server/serve.py:302
+msgid "malcontent_dir_path_not_dir_{}"
+msgstr "Provided 'malcontent_dir' path does not name a directory: {}"
+
+#: src/hydrilla/server/serve.py:321
+msgid "couldnt_load_item_from_{}"
+msgstr "Couldn't load item from {}."
+
+#: src/hydrilla/server/serve.py:347
+msgid "item_{item}_in_file_{file}"
+msgstr "Item {item} incorrectly present under {file}."
+
+#: src/hydrilla/server/serve.py:353
+msgid "item_version_{ver}_in_file_{file}"
+msgstr "Item version {ver} incorrectly present under {file}."
+
+#: src/hydrilla/server/serve.py:376
+msgid "no_dep_{resource}_{ver}_{dep}"
+msgstr "Unknown dependency '{dep}' of resource '{resource}', version '{ver}'."
+
+#: src/hydrilla/server/serve.py:387
+msgid "no_payload_{mapping}_{ver}_{payload}"
+msgstr "Unknown payload '{payload}' of mapping '{mapping}', version '{ver}'."
+
+#: src/hydrilla/server/serve.py:413
+msgid "couldnt_register_{mapping}_{ver}_{pattern}"
+msgstr ""
+"Couldn't register mapping '{mapping}', version '{ver}' (pattern "
+"'{pattern}')."
+
+#: src/hydrilla/server/serve.py:566 src/hydrilla/server/serve.py:588
+#: src/hydrilla/server/serve.py:626
+#, python-format
+msgid "%(prog)s_%(version)s_license"
+msgstr ""
+"%(prog)s %(version)s\n"
+"Copyright (C) 2021,2022 Wojtek Kosior and contributors.\n"
+"License GPLv3+: GNU AGPL version 3 or later "
+"<https://gnu.org/licenses/gpl.html>\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law."
+
+#: src/hydrilla/server/serve.py:577
+msgid "directory_to_serve_from_overrides_config"
+msgstr ""
+"Directory to serve files from. Overrides value from the config file (if "
+"any)."
+
+#: src/hydrilla/server/serve.py:579
+msgid "project_url_to_display_overrides_config"
+msgstr ""
+"Project url to display on generated HTML pages. Overrides value from the "
+"config file (if any)."
+
+#: src/hydrilla/server/serve.py:581
+msgid "tcp_port_to_listen_on_overrides_config"
+msgstr ""
+"TCP port number to listen on (0-65535). Overrides value from the config "
+"file (if any)."
+
+#: src/hydrilla/server/serve.py:584
+msgid "path_to_config_file_explain_default"
+msgstr ""
+"Path to Hydrilla server configuration file (optional, by default Hydrilla"
+" loads its own config file, which in turn tries to load "
+"/etc/hydrilla/config.json)."
+
+#: src/hydrilla/server/serve.py:586
+msgid "language_to_use_overrides_config"
+msgstr ""
+"Language to use (also affects served HTML files). Overrides value from "
+"the config file (if any)."
+
+#: src/hydrilla/server/serve.py:589 src/hydrilla/server/serve.py:627
+msgid "version_printing"
+msgstr "Print version information and exit."
+
+#: src/hydrilla/server/serve.py:617
+msgid "config_option_{}_not_supplied"
+msgstr "Missing configuration option '{}'."
+
+#: src/hydrilla/server/serve.py:621
+msgid "serve_hydrilla_packages_explain_wsgi_considerations"
+msgstr ""
+"Serve Hydrilla packages.\n"
+"\n"
+"This command is meant to be a quick way to run a local or development "
+"Hydrilla instance. For better performance, consider deployment using "
+"WSGI."
+
+#: src/hydrilla/server/serve.py:632
+msgid "serve_hydrilla_packages_wsgi_help"
+msgstr ""
+"Serve Hydrilla packages.\n"
+"\n"
+"This program is a WSGI script that runs Hydrilla repository behind an "
+"HTTP server like Apache2 or Nginx. You can configure Hydrilla through the"
+" /etc/hydrilla/config.json file."
+
+#. 'hydrilla' as a title
+#: src/hydrilla/server/templates/base.html:99
+#: src/hydrilla/server/templates/base.html:105
+msgid "hydrilla"
+msgstr "Hydrilla"
+
+#: src/hydrilla/server/templates/index.html:29
+msgid "hydrilla_welcome"
+msgstr "Welcome to Hydrilla!"
+
diff --git a/src/hydrilla/server/serve.py b/src/hydrilla/server/serve.py
new file mode 100644
index 0000000..a6a1204
--- /dev/null
+++ b/src/hydrilla/server/serve.py
@@ -0,0 +1,642 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Main repository logic.
+#
+# This file is part of Hydrilla
+#
+# Copyright (C) 2021, 2022 Wojtek Kosior
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+#
+# I, Wojtek Kosior, thereby promise not to sue for violation of this
+# file's license. Although I request that you do not make use this code
+# in a proprietary program, I am not going to enforce this in court.
+
+# Enable using with Python 3.7.
+from __future__ import annotations
+
+import re
+import os
+import pathlib
+import json
+import logging
+
+from pathlib import Path
+from hashlib import sha256
+from abc import ABC, abstractmethod
+from typing import Optional, Union, Iterable
+
+import click
+import flask
+
+from werkzeug import Response
+
+from .. import util
+from . import config
+from . import _version
+
+here = Path(__file__).resolve().parent
+
+generated_by = {
+    'name': 'hydrilla.server',
+    'version': _version.version
+}
+
+class ItemInfo(ABC):
+    """Shortened data of a resource/mapping."""
+    def __init__(self, item_obj: dict):
+        """Initialize ItemInfo using item definition read from JSON."""
+        self.version    = util.normalize_version(item_obj['version'])
+        self.identifier = item_obj['identifier']
+        self.uuid       = item_obj.get('uuid')
+        self.long_name  = item_obj['long_name']
+
+    def path(self) -> str:
+        """
+        Get a relative path to this item's JSON definition with respect to
+        directory containing items of this type.
+        """
+        return f'{self.identifier}/{util.version_string(self.version)}'
+
+class ResourceInfo(ItemInfo):
+    """Shortened data of a resource."""
+    def __init__(self, resource_obj: dict):
+        """Initialize ResourceInfo using resource definition read from JSON."""
+        super().__init__(resource_obj)
+
+        dependencies = resource_obj.get('dependencies', [])
+        self.dependencies = [res_ref['identifier'] for res_ref in dependencies]
+
+class MappingInfo(ItemInfo):
+    """Shortened data of a mapping."""
+    def __init__(self, mapping_obj: dict):
+        """Initialize MappingInfo using mapping definition read from JSON."""
+        super().__init__(mapping_obj)
+
+        self.payloads = {}
+        for pattern, res_ref in mapping_obj.get('payloads', {}).items():
+            self.payloads[pattern] = res_ref['identifier']
+
+    def as_query_result(self) -> str:
+        """
+        Produce a json.dump()-able object describing this mapping as one of a
+        collection of query results.
+        """
+        return {
+            'version':    self.version,
+            'identifier': self.identifier,
+            'long_name':  self.long_name
+        }
+
+class VersionedItemInfo:
+    """Stores data of multiple versions of given resource/mapping."""
+    def __init__(self):
+        self.uuid = None
+        self.identifier = None
+        self.by_version = {}
+        self.known_versions = []
+
+    def register(self, item_info: ItemInfo) -> None:
+        """
+        Make item info queryable by version. Perform sanity checks for uuid.
+        """
+        if self.identifier is None:
+            self.identifier = item_info.identifier
+
+        if self.uuid is None:
+            self.uuid = item_info.uuid
+
+        if self.uuid is not None and self.uuid != item_info.uuid:
+            raise ValueError(f_('uuid_mismatch_{identifier}')
+                             .format(identifier=self.identifier))
+
+        ver = item_info.version
+        ver_str = util.version_string(ver)
+
+        if ver_str in self.by_version:
+            raise ValueError(f_('version_clash_{identifier}_{version}')
+                             .format(identifier=self.identifier,
+                                     version=ver_str))
+
+        self.by_version[ver_str] = item_info
+        self.known_versions.append(ver)
+
+    def get_by_ver(self, ver: Optional[list[int]]=None) -> Optional[ItemInfo]:
+        """
+        Find and return info of the newest version of item.
+
+        If ver is specified, instead find and return info of that version of the
+        item (or None if absent).
+        """
+        ver = util.version_string(ver or self.known_versions[-1])
+
+        return self.by_version.get(ver)
+
+    def get_all(self) -> list[ItemInfo]:
+        """
+        Return a list of item info for all its versions, from oldest ot newest.
+        """
+        return [self.by_version[util.version_string(ver)]
+                for ver in self.known_versions]
+
+class PatternTreeNode:
+    """
+    "Pattern Tree" is how we refer to the data structure used for querying
+    Haketilo patterns. Those look like 'https://*.example.com/ab/***'. The goal
+    is to make it possible for given URL to quickly retrieve all known patterns
+    that match it.
+    """
+    def __init__(self):
+        self.wildcard_matches = [None, None, None]
+        self.literal_match    = None
+        self.children         = {}
+
+    def search(self, segments):
+        """
+        Yields all matches of this segments sequence against the tree that
+        starts at this node. Results are produces in order from greatest to
+        lowest pattern specificity.
+        """
+        nodes = [self]
+
+        for segment in segments:
+            next_node = nodes[-1].children.get(segment)
+            if next_node is None:
+                break
+
+            nodes.append(next_node)
+
+        nsegments = len(segments)
+        cond_literal = lambda: len(nodes)     == nsegments
+        cond_wildcard = [
+            lambda: len(nodes) + 1 == nsegments and segments[-1] != '*',
+            lambda: len(nodes) + 1 <  nsegments,
+            lambda: len(nodes) + 1 != nsegments or  segments[-1] != '***'
+        ]
+
+        while nodes:
+            node = nodes.pop()
+
+            for item, condition in [(node.literal_match, cond_literal),
+                                    *zip(node.wildcard_matches, cond_wildcard)]:
+                if item is not None and condition():
+                    yield item
+
+    def add(self, segments, item_instantiator):
+        """
+        Make item queryable through (this branch of) the Pattern Tree. If there
+        was not yet any item associated with the tree path designated by
+        segments, create a new one using item_instantiator() function. Return
+        all items matching this path (both the ones that existed and the ones
+        just created).
+        """
+        node = self
+        segment = None
+
+        for segment in segments:
+            wildcards = node.wildcard_matches
+
+            child = node.children.get(segment) or PatternTreeNode()
+            node.children[segment] = child
+            node = child
+
+        if node.literal_match is None:
+            node.literal_match = item_instantiator()
+
+        if segment not in ('*', '**', '***'):
+            return [node.literal_match]
+
+        if wildcards[len(segment) - 1] is None:
+            wildcards[len(segment) - 1] = item_instantiator()
+
+        return [node.literal_match, wildcards[len(segment) - 1]]
+
+proto_regex  = re.compile(r'^(?P<proto>\w+)://(?P<rest>.*)$')
+user_re      = r'[^/?#@]+@' # r'(?P<user>[^/?#@]+)@' # discarded for now
+query_re     = r'\??[^#]*'  # r'\??(?P<query>[^#]*)' # discarded for now
+domain_re    = r'(?P<domain>[^/?#]+)'
+path_re      = r'(?P<path>[^?#]*)'
+http_regex   = re.compile(f'{domain_re}{path_re}{query_re}.*')
+ftp_regex    = re.compile(f'(?:{user_re})?{domain_re}{path_re}.*')
+
+class UrlError(ValueError):
+    """Used to report a URL or URL pattern that is invalid or unsupported."""
+    pass
+
+class DeconstructedUrl:
+    """Represents a deconstructed URL or URL pattern"""
+    def __init__(self, url):
+        self.url = url
+
+        match = proto_regex.match(url)
+        if not match:
+            raise UrlError(f_('invalid_URL_{}').format(url))
+
+        self.proto = match.group('proto')
+        if self.proto not in ('http', 'https', 'ftp'):
+            raise UrlError(f_('disallowed_protocol_{}').format(proto))
+
+        if self.proto == 'ftp':
+            match = ftp_regex.match(match.group('rest'))
+        elif self.proto in ('http', 'https'):
+            match = http_regex.match(match.group('rest'))
+
+        if not match:
+            raise UrlError(f_('invalid_URL_{}').format(url))
+
+        self.domain = match.group('domain').split('.')
+        self.domain.reverse()
+        self.path = [*filter(None, match.group('path').split('/'))]
+
+class PatternMapping:
+    """
+    A mapping info, together with one of its patterns, as stored in Pattern
+    Tree.
+    """
+    def __init__(self, pattern: str, mapping_info: MappingInfo):
+        self.pattern = pattern
+        self.mapping_info = mapping_info
+
+    def register(self, pattern_tree: dict):
+        """
+        Make self queryable through the Pattern Tree passed in the argument.
+        """
+        deco = DeconstructedUrl(self.pattern)
+
+        domain_tree = pattern_tree.get(deco.proto) or PatternTreeNode()
+        pattern_tree[deco.proto] = domain_tree
+
+        for path_tree in domain_tree.add(deco.domain, PatternTreeNode):
+            for match_list in path_tree.add(deco.path, list):
+                match_list.append(self)
+
+class Malcontent:
+    """
+    Instance of this class represents a directory with files that can be loaded
+    and served by Hydrilla.
+    """
+    def __init__(self, malcontent_dir_path: Path):
+        """
+        When an instance of Malcontent is constructed, it searches
+        malcontent_dir_path for serveable site-modifying packages and loads
+        them into its data structures.
+        """
+        self.infos = {'resource': {}, 'mapping': {}}
+        self.pattern_tree = {}
+
+        self.malcontent_dir_path = malcontent_dir_path
+
+        if not self.malcontent_dir_path.is_dir():
+            raise ValueError(f_('malcontent_dir_path_not_dir_{}')
+                             .format(malcontent_dir_path))
+
+        for item_type in ('mapping', 'resource'):
+            type_path = self.malcontent_dir_path / item_type
+            if not type_path.is_dir():
+                continue
+
+            for subpath in type_path.iterdir():
+                if not subpath.is_dir():
+                    continue
+
+                for ver_file in subpath.iterdir():
+                    try:
+                        self._load_item(item_type, ver_file)
+                    except Exception as e:
+                        if flask.current_app._hydrilla_werror:
+                            raise e from None
+
+                        msg = f_('couldnt_load_item_from_{}').format(ver_file)
+                        logging.error(msg, exc_info=True)
+
+        self._report_missing()
+        self._finalize()
+
+    def _load_item(self, item_type: str, ver_file: Path) -> None:
+        """
+        Reads, validates and autocompletes serveable mapping/resource
+        definition, then registers information from it in data structures.
+        """
+        version    = util.parse_version(ver_file.name)
+        identifier = ver_file.parent.name
+
+        with open(ver_file, 'rt') as file_handle:
+            item_json = json.load(file_handle)
+
+        util.validator_for(f'api_{item_type}_description-1.0.1.schema.json')\
+            .validate(item_json)
+
+        if item_type == 'resource':
+            item_info = ResourceInfo(item_json)
+        else:
+            item_info = MappingInfo(item_json)
+
+        if item_info.identifier != identifier:
+            msg = f_('item_{item}_in_file_{file}')\
+                .format({'item': item_info.identifier, 'file': ver_file})
+            raise ValueError(msg)
+
+        if item_info.version != version:
+            ver_str = util.version_string(item_info.version)
+            msg = f_('item_version_{ver}_in_file_{file}')\
+                .format({'ver': ver_str, 'file': ver_file})
+            raise ValueError(msg)
+
+        versioned_info = self.infos[item_type].get(identifier)
+        if versioned_info is None:
+            versioned_info = VersionedItemInfo()
+            self.infos[item_type][identifier] = versioned_info
+
+        versioned_info.register(item_info)
+
+    def _all_of_type(self, item_type: str) -> Iterable[ItemInfo]:
+        """Iterator over all registered versions of all mappings/resources."""
+        for versioned_info in self.infos[item_type].values():
+            for item_info in versioned_info.by_version.values():
+                yield item_info
+
+    def _report_missing(self) -> None:
+        """
+        Use logger to print information about items that are referenced but
+        were not loaded.
+        """
+        def report_missing_dependency(info: ResourceInfo, dep: str) -> None:
+            msg = f_('no_dep_{resource}_{ver}_{dep}')\
+                .format(dep=dep, resource=info.identifier,
+                        ver=util.version_string(info.version))
+            logging.error(msg)
+
+        for resource_info in self._all_of_type('resource'):
+            for dep in resource_info.dependencies:
+                if dep not in self.infos['resource']:
+                    report_missing_dependency(resource_info, dep)
+
+        def report_missing_payload(info: MappingInfo, payload: str) -> None:
+            msg = f_('no_payload_{mapping}_{ver}_{payload}')\
+                .format(mapping=info.identifier, payload=payload,
+                        ver=util.version_string(info.version))
+            logging.error(msg)
+
+        for mapping_info in self._all_of_type('mapping'):
+            for payload in mapping_info.payloads.values():
+                if payload not in self.infos['resource']:
+                    report_missing_payload(mapping_info, payload)
+
+    def _finalize(self):
+        """
+        Initialize structures needed to serve queries. Called once after all
+        data gets loaded.
+        """
+        for infos_dict in self.infos.values():
+            for versioned_info in infos_dict.values():
+                versioned_info.known_versions.sort()
+
+        for info in self._all_of_type('mapping'):
+            for pattern in info.payloads:
+                try:
+                    PatternMapping(pattern, info).register(self.pattern_tree)
+                except Exception as e:
+                    if flask.current_app._hydrilla_werror:
+                        raise e from None
+                    msg = f_('couldnt_register_{mapping}_{ver}_{pattern}')\
+                        .format(mapping=info.identifier, pattern=pattern,
+                                ver=util.version_string(info.version))
+                    logging.error(msg)
+
+    def query(self, url: str) -> list[MappingInfo]:
+        """
+        Return a list of registered mappings that match url.
+
+        If multiple versions of a mapping are applicable, only the most recent
+        is included in the result.
+        """
+        deco = DeconstructedUrl(url)
+
+        collected = {}
+
+        domain_tree = self.pattern_tree.get(deco.proto) or PatternTreeNode()
+
+        def process_mapping(pattern_mapping: PatternMapping) -> None:
+            if url[-1] != '/' and pattern_mapping.pattern[-1] == '/':
+                return
+
+            info = pattern_mapping.mapping_info
+
+            if info.identifier not in collected or \
+               info.version > collected[info.identifier].version:
+                collected[info.identifier] = info
+
+        for path_tree in domain_tree.search(deco.domain):
+            for matches_list in path_tree.search(deco.path):
+                for pattern_mapping in matches_list:
+                    process_mapping(pattern_mapping)
+
+        return list(collected.values())
+
+bp = flask.Blueprint('bp', __package__)
+
+class HydrillaApp(flask.Flask):
+    """Flask app that implements a Hydrilla server."""
+    def __init__(self, hydrilla_config: dict, flask_config: dict={}):
+        """Create the Flask instance according to the configuration"""
+        super().__init__(__package__, static_url_path='/',
+                         static_folder=hydrilla_config['malcontent_dir'])
+        self.config.update(flask_config)
+
+        # https://stackoverflow.com/questions/9449101/how-to-stop-flask-from-initialising-twice-in-debug-mode
+        if self.debug and os.environ.get('WERKZEUG_RUN_MAIN') != 'true':
+            return
+
+        self.jinja_options = {
+            **self.jinja_options,
+            'extensions': [
+                *self.jinja_options.get('extensions', []),
+                'jinja2.ext.i18n'
+            ]
+        }
+
+        self._hydrilla_translation = \
+            util.translation(here / 'locales', hydrilla_config['language'])
+        self._hydrilla_project_url = hydrilla_config['hydrilla_project_url']
+        self._hydrilla_port = hydrilla_config['port']
+        self._hydrilla_werror = hydrilla_config.get('werror', False)
+
+        if 'hydrilla_parent' in hydrilla_config:
+            raise ValueError("Option 'hydrilla_parent' is not implemented.")
+
+        malcontent_dir = Path(hydrilla_config['malcontent_dir']).resolve()
+        with self.app_context():
+            self._hydrilla_malcontent = Malcontent(malcontent_dir)
+
+        self.register_blueprint(bp)
+
+    def create_jinja_environment(self, *args, **kwargs) \
+        -> flask.templating.Environment:
+        """
+        Flask's create_jinja_environment(), but tweaked to always include the
+        'hydrilla_project_url' global variable and to install proper
+        translations.
+        """
+        env = super().create_jinja_environment(*args, **kwargs)
+        env.install_gettext_translations(self._hydrilla_translation)
+        env.globals['hydrilla_project_url'] = self._hydrilla_project_url
+
+        return env
+
+    def run(self, *args, **kwargs):
+        """
+        Flask's run(), but tweaked to use the port from hydrilla configuration
+        by default.
+        """
+        return super().run(*args, port=self._hydrilla_port, **kwargs)
+
+def f_(text_key):
+    return flask.current_app._hydrilla_translation.gettext(text_key)
+
+def malcontent():
+    return flask.current_app._hydrilla_malcontent
+
+@bp.route('/')
+def index():
+    return flask.render_template('index.html')
+
+identifier_json_re = re.compile(r'^([-0-9a-z.]+)\.json$')
+
+def get_resource_or_mapping(item_type: str, identifier: str) -> Response:
+    """
+    Strip '.json' from 'identifier', look the item up and send its JSON
+    description.
+    """
+    match = identifier_json_re.match(identifier)
+    if not match:
+        flask.abort(404)
+
+    identifier = match.group(1)
+
+    versioned_info = malcontent().infos[item_type].get(identifier)
+
+    info = versioned_info and versioned_info.get_by_ver()
+    if info is None:
+        flask.abort(404)
+
+    # no need for send_from_directory(); path is safe, constructed by us
+    file_path = malcontent().malcontent_dir_path / item_type / info.path()
+    return flask.send_file(open(file_path, 'rb'), mimetype='application/json')
+
+@bp.route('/mapping/<string:identifier_dot_json>')
+def get_newest_mapping(identifier_dot_json: str) -> Response:
+    return get_resource_or_mapping('mapping', identifier_dot_json)
+
+@bp.route('/resource/<string:identifier_dot_json>')
+def get_newest_resource(identifier_dot_json: str) -> Response:
+    return get_resource_or_mapping('resource', identifier_dot_json)
+
+@bp.route('/query')
+def query():
+    url = flask.request.args['url']
+
+    mapping_refs = [i.as_query_result() for i in malcontent().query(url)]
+    result = {
+        '$schema': 'https://hydrilla.koszko.org/schemas/api_query_result-1.schema.json',
+        'mappings': mapping_refs,
+        'generated_by': generated_by
+    }
+
+    return Response(json.dumps(result), mimetype='application/json')
+
+@bp.route('/--help')
+def mm_help():
+    return start.get_help(click.Context(start_wsgi)) + '\n'
+
+@bp.route('/--version')
+def mm_version():
+    prog_info = {'prog': 'Hydrilla', 'version': _version.version}
+    return _('%(prog)s_%(version)s_license') % prog_info + '\n'
+
+default_config_path = Path('/etc/hydrilla/config.json')
+default_malcontent_dir = '/var/lib/hydrilla/malcontent'
+default_project_url = 'https://hydrillabugs.koszko.org/projects/hydrilla/wiki'
+
+console_gettext = util.translation(here / 'locales').gettext
+_ = console_gettext
+
+@click.command(help=_('serve_hydrilla_packages_explain_wsgi_considerations'))
+@click.option('-m', '--malcontent-dir',
+              type=click.Path(exists=True, file_okay=False),
+              help=_('directory_to_serve_from_overrides_config'))
+@click.option('-h', '--hydrilla-project-url', type=click.STRING,
+              help=_('project_url_to_display_overrides_config'))
+@click.option('-p', '--port', type=click.INT,
+              help=_('tcp_port_to_listen_on_overrides_config'))
+@click.option('-c', '--config', 'config_path',
+              type=click.Path(exists=True, dir_okay=False, resolve_path=True),
+              help=_('path_to_config_file_explain_default'))
+@click.option('-l', '--language', type=click.STRING,
+              help=_('language_to_use_overrides_config'))
+@click.version_option(version=_version.version, prog_name='Hydrilla',
+                      message=_('%(prog)s_%(version)s_license'),
+                      help=_('version_printing'))
+def start(malcontent_dir: Optional[str], hydrilla_project_url: Optional[str],
+          port: Optional[int], config_path: Optional[str],
+          language: Optional[str]) -> None:
+    """
+    Run a development Hydrilla server.
+
+    This command is meant to be the entry point of hydrilla command exported by
+    this package.
+    """
+    config_load_opts = {} if config_path is None \
+        else {'config_path': [Path(config_path)]}
+
+    hydrilla_config = config.load(**config_load_opts)
+
+    if malcontent_dir is not None:
+        hydrilla_config['malcontent_dir'] = str(Path(malcontent_dir).resolve())
+
+    if hydrilla_project_url is not None:
+        hydrilla_config['hydrilla_project_url'] = hydrilla_project_url
+
+    if port is not None:
+        hydrilla_config['port'] = port
+
+    if language is not None:
+        hydrilla_config['language'] = language
+
+    lang = hydrilla_config.get('language')
+    _ = console_gettext if lang is None else \
+        util.translation(here / 'locales', lang).gettext
+
+    for opt in ('malcontent_dir', 'hydrilla_project_url', 'port', 'language'):
+        if opt not in hydrilla_config:
+            raise ValueError(_('config_option_{}_not_supplied').format(opt))
+
+    HydrillaApp(hydrilla_config).run()
+
+@click.command(help=_('serve_hydrilla_packages_wsgi_help'),
+               context_settings={
+                   'ignore_unknown_options': True,
+                   'allow_extra_args': True
+               })
+@click.version_option(version=_version.version, prog_name='Hydrilla',
+                      message=_('%(prog)s_%(version)s_license'),
+                      help=_('version_printing'))
+def start_wsgi() -> None:
+    """
+    Create application object for use in WSGI deployment.
+
+    This command Also handles --help and --version options in case it gets
+    called outside WSGI environment.
+    """
+    return HydrillaApp(click.get_current_context().obj or config.load())
diff --git a/src/hydrilla/server/templates/base.html b/src/hydrilla/server/templates/base.html
new file mode 100644
index 0000000..34cb214
--- /dev/null
+++ b/src/hydrilla/server/templates/base.html
@@ -0,0 +1,123 @@
+{# SPDX-License-Identifier: CC-BY-SA-4.0 OR AGPL-3.0-or-later
+
+Base HTML page template.
+
+This file is part of Hydrilla
+
+Copyright (C) 2021 Wojtek Kosior
+
+This file is free cultural work: you can redistribute it with or
+without modification under the terms of the Creative Commons
+Attribution Share Alike 4.0 International as published by the
+Creative Commons Corporation.
+
+This file is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+Creative Commons Attribution Share Alike 4.0 International
+License for more details.
+
+
+I, Wojtek Kosior, thereby promise not to sue for violation of this
+file's license. Although I request that you do not make use this code
+in a proprietary program, I am not going to enforce this in court.
+#}
+
+{% macro link_for(endpoint, text) -%}
+  <a href="{{ url_for(endpoint, **kwargs) }}"
+     {{ caller() if caller is defined }}>
+     {{ text }}
+  </a>
+{%- endmacro %}
+
+<!DOCTYPE html>
+<html>
+  <head>
+    {% block head %}
+      <meta http-equiv="Content-Security-Policy" content="script-src 'none';">
+      <style>
+	{% block styles %}
+	  html, body, div, h1, h2, h3, h4, h5, h6 {
+	    margin: 0;
+	    padding: 0;
+	  }
+
+	  * {
+	    color: #444;
+	  }
+
+	  aside {
+	    display: inline-block;
+            border-left: 0.2em solid #e44;
+            background-color: #edc;
+            padding: 0.2em;
+	  }
+
+	  .nav {
+	    background-color: #ddd;
+	  }
+
+	  .nav>*:hover {
+	    background-color: #999;
+	  }
+
+	  .nav>* {
+	    display: inline-block;
+	    padding: 1em;
+	  }
+
+	  .nav a {
+ 	    text-decoration: none;
+	  }
+
+	  .home_link {
+  	    font-weight: bold;
+	    font-size: 1.5em;
+	    padding: 0.5em;
+	  }
+
+	  .content {
+	    margin: auto;
+	    margin-top: 2em;
+	    margin-bottom: 2em;
+	    max-width: 700px;
+	    padding-left: 1em;
+	    padding-right: 1em;
+	    border-left: 1px #999 solid;
+	    border-right: 1px #999 solid;
+	  }
+
+	  .footer {
+	    font-size: 0.8em;
+	    padding: 1em;
+	    border-top: 1px #777 solid;
+	    text-align: center;
+	  }
+	{% endblock %}
+      </style>
+      {# TRANSLATORS: 'hydrilla' as a title#}
+      <title>{% block title %}{{ _('hydrilla') }}{% endblock %}</title>
+    {% endblock %}
+  </head>
+  <body>
+    {% block body %}
+      <div class="nav">
+	{% call link_for('bp.index', _('hydrilla')) %}
+	  class="home_link"
+	{% endcall %}
+      </div>
+
+      <div class="content">
+	{% block content %}
+	{% endblock %}
+      </div>
+
+      <div class="footer">
+	Copyright &copy; Wojtek Kosior.
+	<br>
+	This page was generated by Hydrilla which is free/libre software.
+	You can get a copy <a href="{{ hydrilla_project_url|e }}">here</a>.
+      </div>
+    {% endblock %}
+  </body>
+</html>
diff --git a/src/hydrilla/server/templates/index.html b/src/hydrilla/server/templates/index.html
new file mode 100644
index 0000000..3063239
--- /dev/null
+++ b/src/hydrilla/server/templates/index.html
@@ -0,0 +1,30 @@
+{# SPDX-License-Identifier: CC-BY-SA-4.0 OR AGPL-3.0-or-later
+
+HTML index page template.
+
+This file is part of Hydrilla
+
+Copyright (C) 2021 Wojtek Kosior
+
+This file is free cultural work: you can redistribute it with or
+without modification under the terms of the Creative Commons
+Attribution Share Alike 4.0 International as published by the
+Creative Commons Corporation.
+
+This file is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+Creative Commons Attribution Share Alike 4.0 International
+License for more details.
+
+
+I, Wojtek Kosior, thereby promise not to sue for violation of this
+file's license. Although I request that you do not make use this code
+in a proprietary program, I am not going to enforce this in court.
+#}
+
+{% extends 'base.html' %}
+{% block content %}
+  {{ super() }}
+  <h2>{{ _('hydrilla_welcome') }}</h2>
+{% endblock %}
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..d382ead
--- /dev/null
+++ b/tests/__init__.py
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: CC0-1.0
+
+# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
+#
+# Available under the terms of Creative Commons Zero v1.0 Universal.
diff --git a/tests/config.json b/tests/config.json
new file mode 100644
index 0000000..a75e2b1
--- /dev/null
+++ b/tests/config.json
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Hydrilla development config file.
+//
+// Copyright (C) 2021, 2022 Wojtek Kosior
+//
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+// this config is meant to be used in development environment; unlike
+// src/hydrilla/server/config.json, it shall not be included in distribution
+{
+    // Relative paths now get resolved from config's containing direcotry.
+    "malcontent_dir": "./sample_malcontent",
+
+    // Hydrilla will display this link to users as a place where they can
+    // obtain sources for its software. This config option is meant to ease
+    // compliance with the AGPL.
+    "hydrilla_project_url": "https://hydrillabugs.koszko.org/projects/hydrilla/wiki",
+
+    // Port to listen on (not relevant when Flask.test_client() is used).
+    "port": 10112,
+
+    // Use english for HTML files and generated messages.
+    "language": "en_US",
+
+    // Make Hydrilla error out on any warning
+    "werror": true
+
+    // With the below we can make hydrilla look for missing content items in
+    // another instance instead of just erroring/warning.
+    // TODO: feature not implemented
+    // ,"hydrilla_parent": "https://api.hydrilla.koszko.org/1.0/"
+}
diff --git a/tests/source-package-example/.reuse/dep5 b/tests/source-package-example/.reuse/dep5
new file mode 100644
index 0000000..9091060
--- /dev/null
+++ b/tests/source-package-example/.reuse/dep5
@@ -0,0 +1,10 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: Hydrilla source package example
+Upstream-Contact: Wojtek Kosior <koszko@koszko.org>
+Source: https://git.koszko.org/hydrilla-source-package-example
+
+# Sample paragraph, commented out:
+#
+# Files: src/*
+# Copyright: $YEAR $NAME <$CONTACT>
+# License: ...
diff --git a/tests/source-package-example/LICENSES/CC0-1.0.txt b/tests/source-package-example/LICENSES/CC0-1.0.txt
new file mode 100644
index 0000000..0e259d4
--- /dev/null
+++ b/tests/source-package-example/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
+    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
+    INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
+    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
+    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
+    HEREUNDER.
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator
+and subsequent owner(s) (each and all, an "owner") of an original work of
+authorship and/or a database (each, a "Work").
+
+Certain owners wish to permanently relinquish those rights to a Work for
+the purpose of contributing to a commons of creative, cultural and
+scientific works ("Commons") that the public can reliably and without fear
+of later claims of infringement build upon, modify, incorporate in other
+works, reuse and redistribute as freely as possible in any form whatsoever
+and for any purposes, including without limitation commercial purposes.
+These owners may contribute to the Commons to promote the ideal of a free
+culture and the further production of creative, cultural and scientific
+works, or to gain reputation or greater distribution for their Work in
+part through the use and efforts of others.
+
+For these and/or other purposes and motivations, and without any
+expectation of additional consideration or compensation, the person
+associating CC0 with a Work (the "Affirmer"), to the extent that he or she
+is an owner of Copyright and Related Rights in the Work, voluntarily
+elects to apply CC0 to the Work and publicly distribute the Work under its
+terms, with knowledge of his or her Copyright and Related Rights in the
+Work and the meaning and intended legal effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be
+protected by copyright and related or neighboring rights ("Copyright and
+Related Rights"). Copyright and Related Rights include, but are not
+limited to, the following:
+
+  i. the right to reproduce, adapt, distribute, perform, display,
+     communicate, and translate a Work;
+ ii. moral rights retained by the original author(s) and/or performer(s);
+iii. publicity and privacy rights pertaining to a person's image or
+     likeness depicted in a Work;
+ iv. rights protecting against unfair competition in regards to a Work,
+     subject to the limitations in paragraph 4(a), below;
+  v. rights protecting the extraction, dissemination, use and reuse of data
+     in a Work;
+ vi. database rights (such as those arising under Directive 96/9/EC of the
+     European Parliament and of the Council of 11 March 1996 on the legal
+     protection of databases, and under any national implementation
+     thereof, including any amended or successor version of such
+     directive); and
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
+     implementations thereof.
+
+2. Waiver. To the greatest extent permitted by, but not in contravention
+of, applicable law, Affirmer hereby overtly, fully, permanently,
+irrevocably and unconditionally waives, abandons, and surrenders all of
+Affirmer's Copyright and Related Rights and associated claims and causes
+of action, whether now known or unknown (including existing as well as
+future claims and causes of action), in the Work (i) in all territories
+worldwide, (ii) for the maximum duration provided by applicable law or
+treaty (including future time extensions), (iii) in any current or future
+medium and for any number of copies, and (iv) for any purpose whatsoever,
+including without limitation commercial, advertising or promotional
+purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each
+member of the public at large and to the detriment of Affirmer's heirs and
+successors, fully intending that such Waiver shall not be subject to
+revocation, rescission, cancellation, termination, or any other legal or
+equitable action to disrupt the quiet enjoyment of the Work by the public
+as contemplated by Affirmer's express Statement of Purpose.
+
+3. Public License Fallback. Should any part of the Waiver for any reason
+be judged legally invalid or ineffective under applicable law, then the
+Waiver shall be preserved to the maximum extent permitted taking into
+account Affirmer's express Statement of Purpose. In addition, to the
+extent the Waiver is so judged Affirmer hereby grants to each affected
+person a royalty-free, non transferable, non sublicensable, non exclusive,
+irrevocable and unconditional license to exercise Affirmer's Copyright and
+Related Rights in the Work (i) in all territories worldwide, (ii) for the
+maximum duration provided by applicable law or treaty (including future
+time extensions), (iii) in any current or future medium and for any number
+of copies, and (iv) for any purpose whatsoever, including without
+limitation commercial, advertising or promotional purposes (the
+"License"). The License shall be deemed effective as of the date CC0 was
+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
+Rights in the Work or (ii) assert any associated claims and causes of
+action with respect to the Work, in either case contrary to Affirmer's
+express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
+    surrendered, licensed or otherwise affected by this document.
+ b. Affirmer offers the Work as-is and makes no representations or
+    warranties of any kind concerning the Work, express, implied,
+    statutory or otherwise, including without limitation warranties of
+    title, merchantability, fitness for a particular purpose, non
+    infringement, or the absence of latent or other defects, accuracy, or
+    the present or absence of errors, whether or not discoverable, all to
+    the greatest extent permissible under applicable law.
+ c. Affirmer disclaims responsibility for clearing rights of other persons
+    that may apply to the Work or any use thereof, including without
+    limitation any person's Copyright and Related Rights in the Work.
+    Further, Affirmer disclaims responsibility for obtaining any necessary
+    consents, permissions or other rights required for any use of the
+    Work.
+ d. Affirmer understands and acknowledges that Creative Commons is not a
+    party to this document and has no duty or obligation with respect to
+    this CC0 or use of the Work.
diff --git a/tests/source-package-example/README.txt b/tests/source-package-example/README.txt
new file mode 100644
index 0000000..c6d5da2
--- /dev/null
+++ b/tests/source-package-example/README.txt
@@ -0,0 +1,2 @@
+This is a sample Hydrilla source package. Hydrilla builder can be used to build
+it for distribution.
diff --git a/tests/source-package-example/README.txt.license b/tests/source-package-example/README.txt.license
new file mode 100644
index 0000000..c02cd58
--- /dev/null
+++ b/tests/source-package-example/README.txt.license
@@ -0,0 +1,3 @@
+SPDX-License-Identifier: CC0-1.0
+
+Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
diff --git a/tests/source-package-example/bye.js b/tests/source-package-example/bye.js
new file mode 100644
index 0000000..fcd0fdc
--- /dev/null
+++ b/tests/source-package-example/bye.js
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Copyright (C) 2021 Wojtek Kosior <koszko@koszko.org>
+//
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+console.log(bye_message + "apple!");
diff --git a/tests/source-package-example/hello.js b/tests/source-package-example/hello.js
new file mode 100644
index 0000000..46c0148
--- /dev/null
+++ b/tests/source-package-example/hello.js
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Copyright (C) 2021 Wojtek Kosior <koszko@koszko.org>
+//
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+console.log(hello_message + "apple!");
diff --git a/tests/source-package-example/index.json b/tests/source-package-example/index.json
new file mode 100644
index 0000000..7162dd7
--- /dev/null
+++ b/tests/source-package-example/index.json
@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Copyright (C) 2021, 2022 Wojtek Kosior <koszko@koszko.org>
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+// This is an example index.json file describing Hydrilla site content. As you
+// can see, for storing site content information Hydrilla utilizes JSON with an
+// additional extension in the form of '//' comments support.
+
+// An index.json file conveys definitions of site resources and pattern->payload
+// mappings. The definitions may reference files under index.json's containing
+// directory, using relative paths. This is how scripts, license texts, etc. are
+// included.
+// File reference always takes the form of an object with "file" property
+// specifying path to the file. In certain contexts additional properties may be
+// allowed or required. Unix paths (using '/' as separator) are assumed. It is
+// not allowed for an index.json file to reference files outside its directory.
+
+// Certain objects are allowed to contain a "comment" field. Although '//'
+// comments can be used in index.json files, they will not be included in
+// generated JSON definitions. If a comment should be included in the
+// definitions served by Hydrilla API, it should be put in a "comment" field of
+// the proper object.
+
+// Unknown object properties will be ignored. This is for compatibility with
+// possible future revisions of the format.
+{
+    // Once our index.json schema changes, this field's value will change. Our
+    // software will be able to handle both current and older formats thanks to
+    // this information present in every index.json file. Schemas that differ by
+    // the first (major) number are always incompatible (e.g. a Hydrilla builder
+    // instance released at the time of 1.2 being the most recent schema version
+    // will not understand version 2.1).
+    // Schemas that are backwards-compatible will have the same major number
+    // and might differ by the second (minor) version number. The third (patch)
+    // and subsequent numbers are being ignored right now.
+    "$schema": "https://hydrilla.koszko.org/schemas/package_source-1.schema.json",
+
+    // Used when referring to this source package. Should be consize, unique
+    // (among other source package names) and can only use a restricted set of
+    // characters. It has to match: [-0-9a-z.]+
+    "source_name": "hello",
+
+    // This property lists files that contain copyright information regarding
+    // this source package as well as texts of licenses used. Although no
+    // specific format of these files is mandated, it is recommended to make
+    // each source package REUSE-compliant, generate an spdx report for it as
+    // `report.spdx` and list this report together with all license files here.
+    "copyright":  [
+	{"file": "report.spdx"},
+	{"file": "LICENSES/CC0-1.0.txt"}
+    ],
+
+    // Where this software/work initially comes from.
+    "upstream_url": "https://git.koszko.org/hydrilla-source-package-example",
+
+    // Additional "comment" field can be used if needed.
+    // "comment": ""
+
+    // List of actual site resources and pattern->payload mappings. Each of them
+    // is represented by an object. Meta-sites and replacement site interfaces
+    // will also belong here once they get implemented.
+    "definitions": [
+	{
+	    // Value of "type" can currently be one of: "resource" and
+	    // "mapping". The one we have here, "resource", defines a list
+	    // of injectable scripts that can be used as a payload or as a
+	    // dependency of another "resource". In the future CSS style sheets
+	    // and WASM modules will also be composite parts of a "resource" as
+	    // scripts are now.
+	    "type": "resource",
+
+	    // Used when referring to this resource in "dependencies" list of
+	    // another resource or in "payload" field of a mapping. Should
+	    // be consize and can only use a restricted set of characters. It
+	    // has to match: [-0-9a-z]+
+	    "identifier": "helloapple",
+
+	    // "long_name" should be used to specify a user-friendly alternative
+	    // to an identifier. It should generally not collide with a long
+	    // name of some resource with a different UUID and also shouldn't
+	    // change in-between versions of the same resource, although
+	    // exceptions to both rules might be considered. Long name is
+	    // allowed to contain arbitrary unicode characters (within reason!).
+	    "long_name": "Hello Apple",
+
+	    // Item definitions contain version information. Version is
+	    // represented as an array of integers, with major version number
+	    // being the first array item. In case of resources, version is
+	    // accompanied by a revision field which contains a positive
+	    // integer. If versions specified by arrays of different length need
+	    // to be compared, the shorter array gets padded with zeroes on the
+	    // right. This means that for example version 1.3 could be given as
+	    // both [1, 3] and [1, 3, 0, 0] (aka 1.3.0.0) and either would mean
+	    // the same.
+	    // Different versions (e.g. 1.0 and 1.3) of the same resource can be
+	    // defined in separate index.json files. This makes it easy to
+	    // accidently cause an identifier clash. To help detect it, we allow
+	    // each resource to have a UUID associated with it. Attempt to
+	    // define multiple resources with the same identifier and different
+	    // UUIDs will result in an error being reported. Defining multiple
+	    // resources with different identifiers and the same UUID is
+	    // disallowed for now (it may be later permitted if we consider it
+	    // good for some use-case).
+	    // As of package source schema version 1.0, UUIDs are optional and
+	    // can be omitted.
+	    "uuid": "a6754dcb-58d8-4b7a-a245-24fd7ad4cd68",
+
+	    // Version should match the upstream version of the resource (e.g. a
+	    // version of javascript library). Revision number starts as 1 for
+	    // each new resource version and gets incremented by 1 each time a
+	    // modification to the packaging of this version is done. Hydrilla
+	    // will allow multiple definitions of the same resource to load, as
+	    // long as their versions differ. Thanks to the "version" and
+	    // "revision" fields, clients will know they have to update certain
+	    // resource after it has been updated. If multiple definitions of
+	    // the same version of given resource are provided, an error is
+	    // generated (even if those definitions differ by revision number).
+	    "version": [2021, 11, 10],
+	    "revision": 1,
+
+	    // A short, meaningful description of what the resource is and/or
+	    // what it does.
+	    "description": "greets an apple",
+
+	    // If needed, a "comment" field can be added to provide some
+	    // additional information.
+	    // "comment": "this resource something something",
+
+	    // Resource's "dependencies" array shall contain names of other
+	    // resources that (in case of scripts at least) should get evaluated
+	    // on a page before this resource's own scripts.
+	    "dependencies": [{"identifier": "hello-message"}],
+
+	    // Array of javascript files that belong to this resource.
+	    "scripts": [
+		{"file": "hello.js"},
+		{"file":   "bye.js"}
+	    ]
+	}, {
+	    "type":	   "resource",
+	    "identifier":  "hello-message",
+	    "long_name":   "Hello Message",
+	    "uuid":	   "1ec36229-298c-4b35-8105-c4f2e1b9811e",
+	    "version":     [2021, 11, 10],
+	    "revision":    2,
+	    "description": "define messages for saying hello and bye",
+	    // If "dependencies" is empty, it can also be omitted.
+	    // "dependencies": [],
+	    "scripts": [{"file": "message.js"}]
+	}, {
+	    "type": "mapping",
+
+	    // Has similar function to resource's identifier. Should be consize
+	    // and can only use a restricted set of characters. It has to match:
+	    // [-0-9a-z]+
+	    // It can be the same as some resource identifier (those are
+	    // different entities and are treated separately).
+	    "identifier": "helloapple",
+
+	    // "long name" and "uuid" have the same meaning as in the case of
+	    // resources and "uuid" is also optional. UUIDs of a resource and a
+	    // mapping can technically be the same but it is recommended to
+	    // avoid even this kind of repetition.
+	    "long_name": "Hello Apple",
+	    "uuid": "54d23bba-472e-42f5-9194-eaa24c0e3ee7",
+
+	    // "version" differs from its counterpart in resource in that it has
+	    // no accompanying revision number.
+	    "version": [2021, 11, 10],
+
+	    // A short, meaningful description of what the mapping does.
+	    "description": "causes apple to get greeted on Hydrillabugs issue tracker",
+
+	    // A comment, if necessary.
+	    // "comment": "blah blah because bleh"
+
+	    // The "payloads" object specifies which payloads are to be applied
+	    // to which URLs.
+	    "payloads": {
+		// Each key should be a valid Haketilo URL pattern.
+		"https://hydrillabugs.koszko.org/***": {
+		    // Should be the name of an existing resource. The resource
+		    // may, but doesn't have to, be defined in the same
+		    // index.json file.
+		    "identifier": "helloapple"
+		},
+		// More associations may follow.
+		"https://hachettebugs.koszko.org/***": {
+		    "identifier": "helloapple"
+		}
+	    }
+	}
+    ],
+    // We can also list additional files to include in the produced source
+    // archive. Hydrilla builder will then include those together with all
+    // script and copyright files used.
+    "additional_files": [
+	{"file": "README.txt"},
+	{"file": "README.txt.license"},
+	{"file": ".reuse/dep5"}
+    ],
+    // We can optionally tell Hydrilla builder to run the REUSE tool to generate
+    // report.spdx file. Using this option requires REUSE to be installed and
+    // and importable in the Python virtualenv used by Hydrilla builder.
+    "reuse_generate_spdx_report": true
+}
diff --git a/tests/source-package-example/message.js b/tests/source-package-example/message.js
new file mode 100644
index 0000000..2ad61cb
--- /dev/null
+++ b/tests/source-package-example/message.js
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: CC0-1.0
+
+// Copyright (C) 2021 Wojtek Kosior <koszko@koszko.org>
+//
+// Available under the terms of Creative Commons Zero v1.0 Universal.
+
+var hello_message = "hello, "
+var bye_message = "bye, "
diff --git a/tests/test_server.py b/tests/test_server.py
new file mode 100644
index 0000000..0820d5c
--- /dev/null
+++ b/tests/test_server.py
@@ -0,0 +1,274 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Repository tests
+#
+# This file is part of Hydrilla
+#
+# Copyright (C) 2021, 2022 Wojtek Kosior
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+#
+# I, Wojtek Kosior, thereby promise not to sue for violation of this
+# file's license. Although I request that you do not make use this code
+# in a proprietary program, I am not going to enforce this in court.
+
+# Enable using with Python 3.7.
+from __future__ import annotations
+
+import pytest
+import sys
+import shutil
+import json
+
+from pathlib import Path
+from hashlib import sha256
+from tempfile import TemporaryDirectory
+from typing import Callable, Optional
+
+from flask.testing import FlaskClient
+from markupsafe import escape
+from werkzeug import Response
+
+from hydrilla import util as hydrilla_util
+from hydrilla.builder import Build
+from hydrilla.server import config, _version
+from hydrilla.server.serve import HydrillaApp
+
+here        = Path(__file__).resolve().parent
+config_path = here / 'config.json'
+source_path = here / 'source-package-example'
+
+expected_generated_by = {
+    'name': 'hydrilla.server',
+    'version': _version.version
+}
+
+SetupMod = Optional[Callable['Setup', None]]
+
+source_files = (
+    'index.json', 'hello.js', 'bye.js', 'message.js', 'README.txt',
+    'README.txt.license', '.reuse/dep5', 'LICENSES/CC0-1.0.txt'
+)
+
+class Setup:
+    """
+    Facilitate preparing test malcontent directory, Hydrilla config file and the
+    actual Flask client. In a customizable way.
+    """
+    def __init__(self, modify_before_build: SetupMod=None,
+                 modify_after_build: SetupMod=None) -> None:
+        """Initialize Setup."""
+        self._modify_before_build = modify_before_build
+        self._modify_after_build = modify_after_build
+        self._config = None
+        self._client = None
+
+    def _prepare(self) -> None:
+        """Perform the build and call the callbacks as appropriate."""
+        self.tmpdir = TemporaryDirectory()
+
+        self.containing_dir = Path(self.tmpdir.name)
+        self.malcontent_dir = self.containing_dir / 'sample_malcontent'
+        self.index_json     = Path('index.json')
+
+        self.source_dir = self.containing_dir / 'sample_source_package'
+        for source_file in source_files:
+            dst_path = self.source_dir / source_file
+            dst_path.parent.mkdir(parents=True, exist_ok=True)
+            shutil.copyfile(source_path / source_file, dst_path)
+
+        self.config_path = self.containing_dir / 'config.json'
+        shutil.copyfile(config_path, self.config_path)
+
+        if self._modify_before_build:
+            self._modify_before_build(self)
+
+        build = Build(self.source_dir, self.index_json)
+        build.write_package_files(self.malcontent_dir)
+
+        if self._modify_after_build:
+            self._modify_after_build(self)
+
+    def config(self) -> dict:
+        """Provide the contents of JSON config file used."""
+        if self._config is None:
+            self._prepare()
+            self._config = config.load([self.config_path])
+
+        return self._config
+
+    def client(self) -> FlaskClient:
+        """
+        Provide app client that serves the objects from built sample package.
+        """
+        if self._client is None:
+            app = HydrillaApp(self.config(), flask_config={'TESTING': True})
+            self._client = app.test_client()
+
+        return self._client
+
+def remove_all_uuids(setup: Setup) -> None:
+    """Modify sample packages before build to contain no (optional) UUIDs"""
+    index_json = (setup.source_dir / 'index.json').read_text()
+    index_json = json.loads(hydrilla_util.strip_json_comments(index_json))
+
+    for definition in index_json['definitions']:
+        del definition['uuid']
+
+    index_json = ("// SPDX-License-Identifier: CC0-1.0\n" +
+                  "// Copyright (C) 2021, 2022 Wojtek Kosior\n" +
+                  json.dumps(index_json))
+
+    (setup.source_dir / 'index.json').write_text(index_json)
+
+default_setup = Setup()
+uuidless_setup = Setup(modify_before_build=remove_all_uuids)
+
+def def_get(url: str) -> Response:
+    """Convenience wrapper for def_get()"""
+    return default_setup.client().get(url)
+
+def test_project_url() -> None:
+    """Fetch index.html and verify project URL from config is present there."""
+    response = def_get('/')
+    assert b'html' in response.data
+    project_url = default_setup.config()['hydrilla_project_url']
+    assert escape(project_url).encode() in response.data
+
+@pytest.mark.parametrize('setup', [default_setup, uuidless_setup])
+@pytest.mark.parametrize('item_type', ['resource', 'mapping'])
+def test_get_newest(setup: Setup, item_type: str) -> None:
+    """
+    Verify that
+        GET '/{item_type}/{item_identifier}.json'
+    returns proper definition that is also served at:
+        GET '/{item_type}/{item_identifier}/{item_version}'
+    """
+    response = setup.client().get(f'/{item_type}/helloapple.json')
+    assert response.status_code == 200
+    definition = json.loads(response.data.decode())
+    assert definition['type']        == item_type
+    assert definition['identifier']  == 'helloapple'
+
+    response = setup.client().get(f'/{item_type}/helloapple/2021.11.10')
+    assert response.status_code == 200
+    assert definition == json.loads(response.data.decode())
+
+    assert ('uuid' in definition) == (setup is not uuidless_setup)
+
+    hydrilla_util.validator_for(f'api_{item_type}_description-1.0.1.schema.json')\
+                 .validate(definition)
+
+@pytest.mark.parametrize('item_type', ['resource', 'mapping'])
+def test_get_nonexistent(item_type: str) -> None:
+    """
+    Verify that attempts to GET a JSON definition of a nonexistent item or item
+    version result in 404.
+    """
+    response = def_get(f'/{item_type}/nonexistentapple.json')
+    assert response.status_code == 404
+    response = def_get(f'/{item_type}/helloapple/1.2.3.999')
+    assert response.status_code == 404
+
+@pytest.mark.parametrize('item_type', ['resource', 'mapping'])
+def test_file_refs(item_type: str) -> None:
+    """
+    Verify that files referenced by definitions are accessible under their
+    proper URLs and that their hashes match.
+    """
+    response = def_get(f'/{item_type}/helloapple/2021.11.10')
+    assert response.status_code == 200
+    definition = json.loads(response.data.decode())
+
+    for file_ref in [*definition.get('scripts', []),
+                     *definition['source_copyright']]:
+        hash_sum = file_ref["sha256"]
+        response = def_get(f'/file/sha256/{hash_sum}')
+
+        assert response.status_code == 200
+        assert sha256(response.data).digest().hex() == hash_sum
+
+def test_empty_query() -> None:
+    """
+    Verify that querying mappings for URL gives an empty list when there're no
+    mathes.
+    """
+    response = def_get(f'/query?url=https://nonexiste.nt/example')
+    assert response.status_code == 200
+
+    response_object = json.loads(response.data.decode())
+
+    assert response_object == {
+        '$schema': 'https://hydrilla.koszko.org/schemas/api_query_result-1.schema.json',
+        'mappings': [],
+        'generated_by': expected_generated_by
+    }
+
+    hydrilla_util.validator_for('api_query_result-1.0.1.schema.json')\
+                 .validate(response_object)
+
+def test_query() -> None:
+    """
+    Verify that querying mappings for URL gives a list with reference(s) the the
+    matching mapping(s).
+    """
+    response = def_get(f'/query?url=https://hydrillabugs.koszko.org/')
+    assert response.status_code == 200
+
+    response_object = json.loads(response.data.decode())
+
+    assert response_object == {
+        '$schema': 'https://hydrilla.koszko.org/schemas/api_query_result-1.schema.json',
+        'mappings': [{
+            'identifier': 'helloapple',
+            'long_name': 'Hello Apple',
+            'version': [2021, 11, 10]
+        }],
+        'generated_by': expected_generated_by
+    }
+
+    hydrilla_util.validator_for('api_query_result-1.0.1.schema.json')\
+                 .validate(response_object)
+
+def test_source() -> None:
+    """Verify source descriptions are properly served."""
+    response = def_get(f'/source/hello.json')
+    assert response.status_code == 200
+
+    description = json.loads(response.data.decode())
+    assert description['source_name'] == 'hello'
+
+    assert sorted([d['identifier'] for d in description['definitions']]) == \
+        ['hello-message', 'helloapple', 'helloapple']
+
+    zipfile_hash = description['source_archives']['zip']['sha256']
+    response = def_get(f'/source/hello.zip')
+    assert sha256(response.data).digest().hex() == zipfile_hash
+
+    hydrilla_util.validator_for('api_source_description-1.0.1.schema.json')\
+                 .validate(description)
+
+def test_missing_source() -> None:
+    """Verify requests for nonexistent sources result in 404."""
+    response = def_get(f'/source/nonexistent.json')
+    assert response.status_code == 404
+
+    response = def_get(f'/source/nonexistent.zip')
+    assert response.status_code == 404
+
+def test_normalize_version():
+    assert hydrilla_util.normalize_version([4, 5, 3, 0, 0]) == [4, 5, 3]
+    assert hydrilla_util.normalize_version([1, 0, 5, 0])    == [1, 0, 5]
+    assert hydrilla_util.normalize_version([3, 3])          == [3, 3]