41 lines
935 B
C++
41 lines
935 B
C++
#pragma once
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///@file
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#include "source-accessor.hh"
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#include <functional>
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#include <nlohmann/json_fwd.hpp>
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namespace nix {
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struct Source;
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/**
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* Return an object that provides access to the contents of a NAR
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* file.
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*/
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ref<SourceAccessor> makeNarAccessor(std::string && nar);
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ref<SourceAccessor> makeNarAccessor(Source & source);
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/**
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* Create a NAR accessor from a NAR listing (in the format produced by
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* listNar()). The callback getNarBytes(offset, length) is used by the
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* readFile() method of the accessor to get the contents of files
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* inside the NAR.
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*/
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using GetNarBytes = std::function<std::string(uint64_t, uint64_t)>;
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ref<SourceAccessor> makeLazyNarAccessor(
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const std::string & listing,
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GetNarBytes getNarBytes);
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/**
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* Write a JSON representation of the contents of a NAR (except file
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* contents).
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*/
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nlohmann::json listNar(ref<SourceAccessor> accessor, const CanonPath & path, bool recurse);
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}
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