pyrox.dev
1{ lib, stdenv, coreutils, jq, python3, nix, xz }:
2
3# This function is for creating a flat-file binary cache, i.e. the kind created by
4# nix copy --to file:///some/path and usable as a substituter (with the file:// prefix).
5
6# For example, in the Nixpkgs repo:
7# nix-build -E 'with import ./. {}; mkBinaryCache { rootPaths = [hello]; }'
8
9{ name ? "binary-cache"
10, rootPaths
11}:
12
13stdenv.mkDerivation {
14 inherit name;
15
16 __structuredAttrs = true;
17
18 exportReferencesGraph.closure = rootPaths;
19
20 preferLocalBuild = true;
21
22 nativeBuildInputs = [ coreutils jq python3 nix xz ];
23
24 buildCommand = ''
25 mkdir -p $out/nar
26
27 python ${./make-binary-cache.py}
28
29 # These directories must exist, or Nix might try to create them in LocalBinaryCacheStore::init(),
30 # which fails if mounted read-only
31 mkdir $out/realisations
32 mkdir $out/debuginfo
33 mkdir $out/log
34 '';
35}