mirror of
https://github.com/NixOS/nix
synced 2024-09-20 11:11:03 -04:00
34e20c164c
When importing e.g. a local `nixpkgs` in a flake to test a change like
{
inputs.nixpkgs.url = path:/home/ma27/Projects/nixpkgs;
outputs = /* ... */
}
then the input is missing a `lastModified`-field that's e.g. used in
`nixpkgs.lib.nixosSystem`. Due to the missing `lastMoified`-field, the
mtime is set to 19700101:
result -> /nix/store/b7dg1lmmsill2rsgyv2w7b6cnmixkvc1-nixos-system-nixos-22.05.19700101.dirty
With this change, the `path`-fetcher now sets a `lastModified` attribute
to the `mtime` just like it's the case in the `tarball`-fetcher already.
When building NixOS systems with `nixpkgs` being a `path`-input and this
patch, the output-path now looks like this:
result -> /nix/store/ld2qf9c1s98dxmiwcaq5vn9k5ylzrm1s-nixos-system-nixos-22.05.20220217.dirty
109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
#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. */
|
|
|
|
|
|
void dumpPath(const Path & path, Sink & sink,
|
|
PathFilter & filter = defaultPathFilter);
|
|
|
|
/* Same as `void dumpPath()`, but returns the last modified date of the path */
|
|
time_t dumpPathAndGetMtime(const Path & path, Sink & sink,
|
|
PathFilter & filter = defaultPathFilter);
|
|
|
|
void dumpString(std::string_view 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(uint64_t size) { };
|
|
virtual void receiveContents(std::string_view data) { };
|
|
|
|
virtual void createSymlink(const Path & path, const std::string & target) { };
|
|
};
|
|
|
|
/* If the NAR archive contains a single file at top-level, then save
|
|
the contents of the file to `s'. Otherwise barf. */
|
|
struct RetrieveRegularNARSink : ParseSink
|
|
{
|
|
bool regular = true;
|
|
Sink & sink;
|
|
|
|
RetrieveRegularNARSink(Sink & sink) : sink(sink) { }
|
|
|
|
void createDirectory(const Path & path) override
|
|
{
|
|
regular = false;
|
|
}
|
|
|
|
void receiveContents(std::string_view data) override
|
|
{
|
|
sink(data);
|
|
}
|
|
|
|
void createSymlink(const Path & path, const std::string & target) override
|
|
{
|
|
regular = false;
|
|
}
|
|
};
|
|
|
|
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);
|
|
|
|
void copyPath(const Path & from, const Path & to);
|
|
|
|
|
|
extern const std::string narVersionMagic1;
|
|
|
|
|
|
}
|