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462421d345
This provides a pluggable mechanism for defining new fetchers. It adds
a builtin function 'fetchTree' that generalizes existing fetchers like
'fetchGit', 'fetchMercurial' and 'fetchTarball'. 'fetchTree' takes a
set of attributes, e.g.
fetchTree {
type = "git";
url = "https://example.org/repo.git";
ref = "some-branch";
rev = "abcdef...";
}
The existing fetchers are just wrappers around this. Note that the
input attributes to fetchTree are the same as flake input
specifications and flake lock file entries.
All fetchers share a common cache stored in
~/.cache/nix/fetcher-cache-v1.sqlite. This replaces the ad hoc caching
mechanisms in fetchGit and download.cc (e.g. ~/.cache/nix/{tarballs,git-revs*}).
This also adds support for Git worktrees (c169ea5904).
34 lines
642 B
C++
34 lines
642 B
C++
#pragma once
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#include "fetchers.hh"
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namespace nix::fetchers {
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struct Cache
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{
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virtual void add(
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ref<Store> store,
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const Attrs & inAttrs,
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const Attrs & infoAttrs,
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const StorePath & storePath,
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bool immutable) = 0;
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virtual std::optional<std::pair<Attrs, StorePath>> lookup(
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ref<Store> store,
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const Attrs & inAttrs) = 0;
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struct Result
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{
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bool expired = false;
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Attrs infoAttrs;
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StorePath storePath;
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};
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virtual std::optional<Result> lookupExpired(
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ref<Store> store,
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const Attrs & inAttrs) = 0;
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};
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ref<Cache> getCache();
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}
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