60 lines
1.1 KiB
Nix
60 lines
1.1 KiB
Nix
{
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lib,
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stdenv,
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coreutils,
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jq,
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python3,
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nix,
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xz,
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zstd,
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}:
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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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{
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name ? "binary-cache",
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compression ? "zstd", # one of ["none" "xz" "zstd"]
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rootPaths,
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}:
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assert lib.elem compression [
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"none"
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"xz"
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"zstd"
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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 = [
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coreutils
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jq
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python3
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nix
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]
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++ lib.optional (compression == "xz") xz
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++ lib.optional (compression == "zstd") zstd;
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buildCommand = ''
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mkdir -p $out/nar
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python ${./make-binary-cache.py} --compression "${compression}"
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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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