dockerTools: add nix-prefetch-docker script

1 files changed, 26 insertions, 0 deletions

diff --git a/pkgs/build-support/docker/nix-prefetch-docker.nix b/pkgs/build-support/docker/nix-prefetch-docker.nix
new file mode 100644
index 00000000000..03a936e08e0
--- /dev/null
+++ b/pkgs/build-support/docker/nix-prefetch-docker.nix
@@ -0,0 +1,26 @@
+{ stdenv, makeWrapper, nix, skopeo }:
+
+with stdenv.lib;
+
+stdenv.mkDerivation {
+  name = "nix-prefetch-docker";
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  unpackPhase = ":";
+
+  installPhase = ''
+    install -vD ${./nix-prefetch-docker} $out/bin/$name;
+    wrapProgram $out/bin/$name \
+      --prefix PATH : ${makeBinPath [ nix skopeo ]} \
+      --set HOME /homeless-shelter
+  '';
+
+  preferLocalBuild = true;
+
+  meta = {
+    description = "Script used to obtain source hashes for dockerTools.pullImage";
+    maintainers = with maintainers; [ offline ];
+    platforms = platforms.unix;
+  };
+}