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#pragma once
#include "libutil/serialise.hh"
#include "libutil/types.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. */
void dumpPath(const Path& path, Sink& sink,
PathFilter& filter = defaultPathFilter);
void dumpString(const std::string& s, Sink& sink);
/* FIXME: fix this API, it sucks. */
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 std::string& target){};
};
struct TeeSink : ParseSink {
TeeSource source;
explicit TeeSink(Source& source) : source(source) {}
};
void parseDump(ParseSink& sink, Source& source);
void restorePath(const Path& path, Source& source);
/* Read a NAR from 'source' and write it to 'sink'. */
void copyNAR(Source& source, Sink& sink);
constexpr std::string_view kNarVersionMagic1 = "nix-archive-1";
} // namespace nix
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