35 lines
877 B
Nix
35 lines
877 B
Nix
{ lib, stdenv, coreutils, jq, python3, nix, xz }:
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# This function is for creating a flat-file binary cache, i.e. the kind created by
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# nix copy --to file:///some/path and usable as a substituter (with the file:// prefix).
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# For example, in the Nixpkgs repo:
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# nix-build -E 'with import ./. {}; mkBinaryCache { rootPaths = [hello]; }'
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{ name ? "binary-cache"
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, rootPaths
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}:
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stdenv.mkDerivation {
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inherit name;
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__structuredAttrs = true;
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exportReferencesGraph.closure = rootPaths;
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preferLocalBuild = true;
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nativeBuildInputs = [ coreutils jq python3 nix xz ];
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buildCommand = ''
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mkdir -p $out/nar
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python ${./make-binary-cache.py}
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# These directories must exist, or Nix might try to create them in LocalBinaryCacheStore::init(),
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# which fails if mounted read-only
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mkdir $out/realisations
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mkdir $out/debuginfo
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mkdir $out/log
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'';
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}
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