fetchRadiclePatch: init

1 files changed, 43 insertions, 0 deletions

diff --git a/pkgs/build-support/fetchradiclepatch/default.nix b/pkgs/build-support/fetchradiclepatch/default.nix
new file mode 100644
index 000000000000..22f9ea6c4817
--- /dev/null
+++ b/pkgs/build-support/fetchradiclepatch/default.nix
@@ -0,0 +1,43 @@
+{
+  fetchFromRadicle,
+  jq,
+  lib,
+}:
+
+lib.makeOverridable (
+  {
+    revision,
+    postFetch ? "",
+    nativeBuildInputs ? [ ],
+    ...
+  }@args:
+
+  assert lib.assertMsg (
+    !args ? rev && !args ? tag
+  ) "fetchRadiclePatch does not accept `rev` or `tag` arguments.";
+
+  fetchFromRadicle (
+    {
+      nativeBuildInputs = [ jq ] ++ nativeBuildInputs;
+      rev = revision;
+      leaveDotGit = true;
+      postFetch = ''
+        { read -r head; read -r base; } < <(jq -r '.oid, .base' $out/0)
+        git -C $out fetch --depth=1 "$url" "$base" "$head"
+        git -C $out diff "$base" "$head" > patch
+        rm -r $out
+        mv patch $out
+        ${postFetch}
+      '';
+    }
+    // removeAttrs args [
+      "revision"
+      "postFetch"
+      "nativeBuildInputs"
+      "leaveDotGit"
+    ]
+  )
+  // {
+    inherit revision;
+  }
+)