fetchFromSourcehut: init

pkgs/build-support/fetchsourcehut/default.nix

@@ -0,0 +1,25 @@
+{ fetchzip, lib }:
+
+{ owner
+, repo, rev
+, domain ? "sr.ht"
+, vc ? "git"
+, name ? "source"
+, ... # For hash agility
+} @ args:
+
+with lib;
+
+assert (lib.assertOneOf "vc" vc [ "hg" "git" ]);
+
+let
+  baseUrl = "https://${vc}.${domain}/${owner}/${repo}";
+
+in fetchzip (recursiveUpdate {
+  inherit name;
+  url = "${baseUrl}/archive/${rev}.tar.gz";
+  meta.homepage = "${baseUrl}/";
+  extraPostFetch = optionalString (vc == "hg") ''
+    rm -f "$out/.hg_archival.txt"
+  ''; # impure file; see #12002
+} (removeAttrs args [ "owner" "repo" "rev" "domain" "vc" ])) // { inherit rev; }