nix-prefetch-darcs: show date

Author: toastal

pkgs/build-support/fetchdarcs/nix-prefetch-darcs

@@ -141,6 +141,8 @@ if [ -z "$final_path" ]; then
 	# for other scripts
 	# https://darcs.net/Internals/Hashes
 	weak_hash="$(darcs show repo | grep '^ *Weak Hash:' | cut -d: -f2- | tr -d "[:space:]")"
+	date="$(darcs log --repodir="$tmp_clone/$name" --max-count 1 | awk '/^Date:/ { sub(/^Date:[[:space:]]*/, "", $0); printf $0 }')"
+	date="$(date -u -d "$date" "+%Y-%m-%dT%H:%M:%SZ")"
 	cd - >/dev/null
 	rm -rf "$tmp_clone/$name/_darcs"
 
@@ -176,6 +178,7 @@ fi; if [ -s "$final_context" ]; then cat <<EOF
 	"context": $(json_escape "$final_context"),
 EOF
 fi; cat <<EOF
+	"date": "$date",
 	"path": "$final_path",
 	$(json_escape "$hash_algo"): $(json_escape "$hash"),
 	"hash": "$(nix-hash --to-sri --type "$hash_algo" "$hash")"

pkgs/tools/package-management/nix-prefetch-scripts/default.nix

@@ -68,6 +68,7 @@ rec {
   nix-prefetch-darcs = mkPrefetchScript "darcs" ../../../build-support/fetchdarcs/nix-prefetch-darcs [
     darcs
     cacert
+    gawk
     jq
   ];
   nix-prefetch-git = mkPrefetchScript "git" ../../../build-support/fetchgit/nix-prefetch-git [