#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);

}
value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=5488c0ac0659f65ea43cabfafa0c97cdd44fd811'>root</a>/<a href='/guix/log/gnu?id=5488c0ac0659f65ea43cabfafa0c97cdd44fd811'>gnu</a>/<a href='/guix/log/gnu/packages?id=5488c0ac0659f65ea43cabfafa0c97cdd44fd811'>packages</a>/<a href='/guix/log/gnu/packages/loko.scm?id=5488c0ac0659f65ea43cabfafa0c97cdd44fd811'>loko.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/loko.scm?id=5488c0ac0659f65ea43cabfafa0c97cdd44fd811&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-02 23:11:10 +0100'>2022-12-02</span></td><td><a href='/guix/commit/gnu/packages/loko.scm?id=79a3cd34c0318928186a04b6481c4d22c0051d04'>gnu: loko-scheme: Update to 0.12.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/loko.scm (loko-scheme): Update to 0.12.0.
[arguments]&lt;#:make-flags&gt;: No need to specify GDB scripts directory.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Zhu Zihao</td></tr>
<tr><td><span title='2022-12-02 23:11:10 +0100'>2022-12-02</span></td><td><a href='/guix/commit/gnu/packages/loko.scm?id=1f5241d8d5913ec5edf30cd4b00f6e7e4228881d'>gnu: loko-scheme: Use G-expressions.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/loko.scm (loko-scheme)[arguments]: Use G-expressions.
&lt;#:phases&gt;: In 'akku-fixes', replace "(assoc-ref inputs name)" with
"this-package-native-input".
[native-inputs]: Use label-less style.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Zhu Zihao</td></tr>