lix/src/libstore/nar-accessor.hh
Eelco Dolstra d62a9390fc Get rid of std::shared_ptr<std::string> and ref<std::string>
These were needed back in the pre-C++11 era because we didn't have
move semantics. But now we do.
2022-01-18 11:12:30 +01:00

35 lines
893 B
C++

#pragma once
#include <functional>
#include "fs-accessor.hh"
namespace nix {
struct Source;
/* Return an object that provides access to the contents of a NAR
file. */
ref<FSAccessor> makeNarAccessor(std::string && nar);
ref<FSAccessor> makeNarAccessor(Source & source);
/* Create a NAR accessor from a NAR listing (in the format produced by
listNar()). The callback getNarBytes(offset, length) is used by the
readFile() method of the accessor to get the contents of files
inside the NAR. */
typedef std::function<std::string(uint64_t, uint64_t)> GetNarBytes;
ref<FSAccessor> makeLazyNarAccessor(
const std::string & listing,
GetNarBytes getNarBytes);
class JSONPlaceholder;
/* Write a JSON representation of the contents of a NAR (except file
contents). */
void listNar(JSONPlaceholder & res, ref<FSAccessor> accessor,
const Path & path, bool recurse);
}