# The program `nuke-refs' created by this derivation replaces all
# references to the Nix store in the specified files by a non-existent
# path (/nix/store/eeee...).  This is useful for getting rid of
# dependencies that you know are not actually needed at runtime.

{
  lib,
  stdenvNoCC,
  perl,
  signingUtils,
  shell ? stdenvNoCC.shell,
}:

stdenvNoCC.mkDerivation {
  name = "nuke-references";

  strictDeps = true;
  enableParallelBuilding = true;
  dontUnpack = true;
  dontConfigure = true;
  dontBuild = true;

  installPhase = ''
    mkdir -p $out/bin
    substituteAll ${./nuke-refs.sh} $out/bin/nuke-refs
    chmod a+x $out/bin/nuke-refs
  '';

  # FIXME: get rid of perl dependency.
  env = {
    inherit perl;
    inherit (builtins) storeDir;
    shell = lib.getBin shell + (shell.shellPath or "");
    signingUtils = lib.optionalString (
      stdenvNoCC.targetPlatform.isDarwin && stdenvNoCC.targetPlatform.isAarch64
    ) signingUtils;
  };

  meta.mainProgram = "nuke-refs";
}