77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
#pragma once
|
|
|
|
#include "serialise.hh"
|
|
#include "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 string& target){};
|
|
};
|
|
|
|
struct TeeSink : ParseSink {
|
|
TeeSource source;
|
|
|
|
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);
|
|
|
|
extern const std::string narVersionMagic1;
|
|
|
|
} // namespace nix
|