#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);

}
t>
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<div class='content'><div id='summary'><pre>
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2024 Ludovic Courtès &lt;ludo@gnu.org&gt;
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see &lt;http://www.gnu.org/licenses/&gt;.

;; This manifest &quot;ungrafts&quot; all the currently grafted packages and returns
;; said packages and all their dependents.

(use-modules (guix diagnostics)
             (guix i18n)
             (guix packages)
             (guix profiles)
             (guix store)
             ((guix scripts build) #:select (dependents))
             ((gnu packages) #:select (all-packages))
             (srfi srfi-1))

(define (grafted-packages)
  (info (G_ &quot;enumerating grafted packages...~%&quot;))
  (let ((result (filter package-replacement (all-packages))))
    (info (G_ &quot;found ~d grafted packages:~{ ~a~}~%&quot;)
          (length result) (map package-full-name result))
    result))

(define ungraft
  (package-mapping (lambda (p)
                     (or (package-replacement p) p))
                   #:deep? #t))

(manifest
 (with-store store
   (let ((grafted (grafted-packages)))
     (map (lambda (package)
            (manifest-entry
              (inherit (package-&gt;manifest-entry (ungraft package)))
              (name (string-append (package-name package) &quot;-ungrafted&quot;))))
          (dependents store grafted)))))
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