[PATCH/RFC 05/10] Rework redo_merge

@@ -115,14 +115,17 @@ has_action () {
 }
 
 redo_merge() {
-	author_script=$(get_author_ident_from_commit $sha1)
-	eval "$author_script"
+	local sha1
+	sha1=$1
+	shift
+
+	eval "$(get_author_ident_from_commit $sha1)"
 	msg="$(git cat-file commit $sha1 | sed -e '1,/^$/d')"
+
 	if ! GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
 		GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
 		GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
-		output git merge $STRATEGY -m "$msg" \
-			$new_parents
+		output git merge $STRATEGY -m "$msg" "$@"
 	then
 		git rerere
 		printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG

@@ -198,8 +201,7 @@ pick_one_preserving_merges () {
 		case "$new_parents" in
 		' '*' '*)
 			# No point in merging the first parent, that's HEAD
-			new_parents=${new_parents# $first_parent}
-			redo_merge
+			redo_merge $sha1 ${new_parents# $first_parent}
 			;;
 		*)
 			output git cherry-pick "$@" ||