forked from lix-project/lix
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).
61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
#include "tree-info.hh"
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#include "store-api.hh"
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#include <nlohmann/json.hpp>
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namespace nix::fetchers {
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StorePath TreeInfo::computeStorePath(Store & store) const
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{
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assert(narHash);
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return store.makeFixedOutputPath(true, narHash, "source");
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}
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TreeInfo TreeInfo::fromJson(const nlohmann::json & json)
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{
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TreeInfo info;
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auto i = json.find("info");
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if (i != json.end()) {
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const nlohmann::json & i2(*i);
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auto j = i2.find("narHash");
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if (j != i2.end())
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info.narHash = Hash((std::string) *j);
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else
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throw Error("attribute 'narHash' missing in lock file");
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j = i2.find("revCount");
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if (j != i2.end())
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info.revCount = *j;
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j = i2.find("lastModified");
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if (j != i2.end())
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info.lastModified = *j;
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return info;
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}
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i = json.find("narHash");
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if (i != json.end()) {
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info.narHash = Hash((std::string) *i);
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return info;
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}
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throw Error("attribute 'info' missing in lock file");
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}
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nlohmann::json TreeInfo::toJson() const
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{
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nlohmann::json json;
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assert(narHash);
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json["narHash"] = narHash.to_string(SRI);
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if (revCount)
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json["revCount"] = *revCount;
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if (lastModified)
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json["lastModified"] = *lastModified;
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return json;
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}
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}
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