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Nix
at master
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960{ lib, stdenv, coreutils, jq, python3, nix, xz, zstd,}:
# This function is for creating a flat-file binary cache, i.e. the kind created by# nix copy --to file:///some/path and usable as a substituter (with the file:// prefix).
# For example, in the Nixpkgs repo:# nix-build -E 'with import ./. {}; mkBinaryCache { rootPaths = [hello]; }'
{ name ? "binary-cache", compression ? "zstd", # one of ["none" "xz" "zstd"] rootPaths,}:
assert lib.elem compression [ "none" "xz" "zstd"];
stdenv.mkDerivation { inherit name;
__structuredAttrs = true;
exportReferencesGraph.closure = rootPaths;
preferLocalBuild = true;
nativeBuildInputs = [ coreutils jq python3 nix ] ++ lib.optional (compression == "xz") xz ++ lib.optional (compression == "zstd") zstd;
buildCommand = '' mkdir -p $out/nar
python ${./make-binary-cache.py} --compression "${compression}"
# These directories must exist, or Nix might try to create them in LocalBinaryCacheStore::init(), # which fails if mounted read-only mkdir $out/realisations mkdir $out/debuginfo mkdir $out/log '';}