lix/src/libstore/fs-accessor.hh
Eelco Dolstra 338f29dbd4 nix ls-{nar,store}: Return offset of files in the NAR if known
E.g.

  $ nix ls-store --json --recursive --store https://cache.nixos.org /nix/store/b0w2hafndl09h64fhb86kw6bmhbmnpm1-blender-2.79 \
    | jq .entries.bin.entries.blender.narOffset
  400
2017-12-07 01:07:07 +01:00

32 lines
732 B
C++

#pragma once
#include "types.hh"
namespace nix {
/* An abstract class for accessing a filesystem-like structure, such
as a (possibly remote) Nix store or the contents of a NAR file. */
class FSAccessor
{
public:
enum Type { tMissing, tRegular, tSymlink, tDirectory };
struct Stat
{
Type type = tMissing;
uint64_t fileSize = 0; // regular files only
bool isExecutable = false; // regular files only
uint64_t narOffset = 0; // regular files only
};
virtual Stat stat(const Path & path) = 0;
virtual StringSet readDirectory(const Path & path) = 0;
virtual std::string readFile(const Path & path) = 0;
virtual std::string readLink(const Path & path) = 0;
};
}