1 files changed, 36 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/build-support/fetchgitlab/default.nix b/nixpkgs/pkgs/build-support/fetchgitlab/default.nix
new file mode 100644
index 000000000000..749883f2365e
--- /dev/null
+++ b/nixpkgs/pkgs/build-support/fetchgitlab/default.nix
@@ -0,0 +1,36 @@
+{ lib, fetchgit, fetchzip }:
+
+lib.makeOverridable (
+# gitlab example
+{ owner, repo, rev, protocol ? "https", domain ? "gitlab.com", name ? "source", group ? null
+, fetchSubmodules ? false, leaveDotGit ? false
+, deepClone ? false, forceFetchGit ? false
+, sparseCheckout ? []
+, ... # For hash agility
+} @ args:
+
+let
+  slug = lib.concatStringsSep "/" ((lib.optional (group != null) group) ++ [ owner repo ]);
+  escapedSlug = lib.replaceStrings [ "." "/" ] [ "%2E" "%2F" ] slug;
+  escapedRev = lib.replaceStrings [ "+" "%" "/" ] [ "%2B" "%25" "%2F" ] rev;
+  passthruAttrs = removeAttrs args [ "protocol" "domain" "owner" "group" "repo" "rev" "fetchSubmodules" "forceFetchGit" "leaveDotGit" "deepClone" ];
+
+  useFetchGit = fetchSubmodules || leaveDotGit || deepClone || forceFetchGit || (sparseCheckout != []);
+  fetcher = if useFetchGit then fetchgit else fetchzip;
+
+  gitRepoUrl = "${protocol}://${domain}/${slug}.git";
+
+  fetcherArgs = (if useFetchGit then {
+    inherit rev deepClone fetchSubmodules sparseCheckout leaveDotGit;
+    url = gitRepoUrl;
+  } else {
+    url = "${protocol}://${domain}/api/v4/projects/${escapedSlug}/repository/archive.tar.gz?sha=${escapedRev}";
+
+    passthru = {
+      inherit gitRepoUrl;
+    };
+  }) // passthruAttrs // { inherit name; };
+in
+
+fetcher fetcherArgs // { meta.homepage = "${protocol}://${domain}/${slug}/"; inherit rev owner repo; }
+)