#pragma once

#include "types.hh"
#include "serialise.hh"


namespace nix {


/* dumpPath creates a Nix archive of the specified path.  The format
   is as follows:

   IF path points to a REGULAR FILE:
     dump(path) = attrs(
       [ ("type", "regular")
       , ("contents", contents(path))
       ])

   IF path points to a DIRECTORY:
     dump(path) = attrs(
       [ ("type", "directory")
       , ("entries", concat(map(f, sort(entries(path)))))
       ])
       where f(fn) = attrs(
         [ ("name", fn)
         , ("file", dump(path + "/" + fn))
         ])

   where:

     attrs(as) = concat(map(attr, as)) + encN(0)
     attrs((a, b)) = encS(a) + encS(b)

     encS(s) = encN(len(s)) + s + (padding until next 64-bit boundary)

     encN(n) = 64-bit little-endian encoding of n.

     contents(path) = the contents of a regular file.

     sort(strings) = lexicographic sort by 8-bit value (strcmp).

     entries(path) = the entries of a directory, without `.' and
     `..'.

     `+' denotes string concatenation. */

struct PathFilter
{
    virtual ~PathFilter() { }
    virtual bool operator () (const Path & path) { return true; }
};

extern PathFilter defaultPathFilter;

void dumpPath(const Path & path, Sink & sink,
    PathFilter & filter = defaultPathFilter);

struct ParseSink
{
    virtual void createDirectory(const Path & path) { };

    virtual void createRegularFile(const Path & path) { };
    virtual void isExecutable() { };
    virtual void preallocateContents(unsigned long long size) { };
    virtual void receiveContents(unsigned char * data, unsigned int len) { };

    virtual void createSymlink(const Path & path, const string & target) { };
};

void parseDump(ParseSink & sink, Source & source);

void restorePath(const Path & path, Source & source);


// FIXME: global variables are bad m'kay.
extern bool useCaseHack;


}
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<div class='path'>path: <a href='/guix/log/?id=6f20c8df0e2056231c0ce10a535d1c1897db5630'>root</a>/<a href='/guix/log/gnu?id=6f20c8df0e2056231c0ce10a535d1c1897db5630'>gnu</a>/<a href='/guix/log/gnu/packages?id=6f20c8df0e2056231c0ce10a535d1c1897db5630'>packages</a>/<a href='/guix/log/gnu/packages/cinnamon.scm?id=6f20c8df0e2056231c0ce10a535d1c1897db5630'>cinnamon.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/cinnamon.scm?id=6f20c8df0e2056231c0ce10a535d1c1897db5630&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-07-08 23:17:46 +0300'>2023-07-08</span></td><td><a href='/guix/commit/gnu/packages/cinnamon.scm?id=5b35ef308c988a35aa27b1b446d5ea4dbe7ae1b1'>gnu: libxapp: Use a source file-name.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cinnamon.scm (libxapp)[source]: Use a source file-name.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2023-04-22 12:00:34 +0200'>2023-04-22</span></td><td><a href='/guix/commit/gnu/packages/cinnamon.scm?id=8495803336aecf963e30ee36f9adad4024181296'>gnu: libxapp: Update to 2.4.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cinnamon.scm (libxapp): Update to 2.4.3.
</span></span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2023-04-22 12:00:34 +0200'>2023-04-22</span></td><td><a href='/guix/commit/gnu/packages/cinnamon.scm?id=635eab00efdca23798a58a63e078f7b06c7b8535'>gnu: Add nemo.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cinnamon.scm (nemo): New variable.

Signed-off-by: Nicolas Goaziou &lt;mail@nicolasgoaziou.fr&gt;
</span></span></td><td>florhizome</td></tr>
<tr><td><span title='2023-04-22 12:00:25 +0200'>2023-04-22</span></td><td><a href='/guix/commit/gnu/packages/cinnamon.scm?id=23f3f853495f936cb0d1c50828e697085e4d9f7d'>gnu: cinnamon: Update to 5.6.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cinnamon.scm (cinnamon-desktop): Update to 5.4.2.
[arguments]&lt;#:configure-flags&gt;: Enable alsa-support.
[inputs]: Remove PYTHON-2, remove GOBJECT-INTROSPECTION, add LIBEXT, ALSA-LIB.
[native-inputs]: Remove gnu-build-system related packages, add GOBJECT-INTROSPECTION.

Signed-off-by: Nicolas Goaziou &lt;mail@nicolasgoaziou.fr&gt;
</span></span></td><td>florhizome</td></tr>
<tr><td><span title='2023-01-22 10:05:30 +0100'>2023-01-22</span></td><td><a href='/guix/commit/gnu/packages/cinnamon.scm?id=c49f2ac412de0b5671a5bf9a0461a5a52f7e09cd'>gnu: Add libxapp.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/cinnamon.scm (libxapp): New variable.

Signed-off-by: Liliana Marie Prikler &lt;liliana.prikler@gmail.com&gt;
</span></span></td><td>Wamm K. D</td></tr>