Re: rebase --autosquash does not handle fixup! of fixup!

@@ -689,7 +689,17 @@ rearrange_squash () {
 		case "$message" in
 		"squash! "*|"fixup! "*)
 			action="${message%%!*}"
-			rest="${message#*! }"
+			rest=$message
+			while : ; do
+				case "$rest" in
+				"squash! "*|"fixup! "*)
+					rest="${rest#*! }"
+					;;
+				*)
+					break
+					;;
+				esac
+			done
 			echo "$sha1 $action $rest"
 			# if it's a single word, try to resolve to a full sha1 and
 			# emit a second copy. This allows us to match on both message

@@ -389,7 +389,9 @@ squash/fixup series.
 	the same ..., automatically modify the todo list of rebase -i
 	so that the commit marked for squashing comes right after the
 	commit to be modified, and change the action of the moved
-	commit from `pick` to `squash` (or `fixup`).
+	commit from `pick` to `squash` (or `fixup`).  Ignores subsequent
+	"fixup! " or "squash! " after the first, in case you referred to a
+	previous fixup/squash with `git commit --fixup/--squash`.
 +
 This option is only valid when the '--interactive' option is used.
 +

@@ -689,7 +689,18 @@ rearrange_squash () {
 		case "$message" in
 		"squash! "*|"fixup! "*)
 			action="${message%%!*}"
-			rest="${message#*! }"
+			rest=$message
+			# ignore any squash! or fixup! after the first
+			while : ; do
+				case "$rest" in
+				"squash! "*|"fixup! "*)
+					rest="${rest#*! }"
+					;;
+				*)
+					break
+					;;
+				esac
+			done
 			echo "$sha1 $action $rest"
 			# if it's a single word, try to resolve to a full sha1 and
 			# emit a second copy. This allows us to match on both message

@@ -193,4 +193,53 @@ test_expect_success 'use commit --squash' '
 	test_auto_commit_flags squash 2
 '
 
+test_auto_fixup_fixup () {
+	git reset --hard base &&
+	echo 1 >file1 &&
+	git add -u &&
+	test_tick &&
+	git commit -m "$1! first" &&
+	echo 2 >file1 &&
+	git add -u &&
+	test_tick &&
+	git commit -m "$1! $2! first" &&
+	git tag "final-$1-$2" &&
+	test_tick &&
+	git rebase --autosquash -i HEAD^^^^ &&
+	git log --oneline >actual &&
+	test_pause &&
+	if [ "$1" = "fixup" ]; then
+		test_line_count = 3 actual
+	elif [ "$1" = "squash" ]; then
+		test_line_count = 4 actual
+	else
+		false
+	fi &&
+	git diff --exit-code "final-$1-$2" &&
+	test 2 = "$(git cat-file blob HEAD^:file1)" &&
+	if [ "$1" = "fixup" ]; then
+		test 1 = $(git cat-file commit HEAD^ | grep first | wc -l)
+	elif [ "$1" = "squash" ]; then
+		test 3 = $(git cat-file commit HEAD^ | grep first | wc -l)
+	else
+		false
+	fi
+}
+
+test_expect_success 'fixup! fixup!' '
+	test_auto_fixup_fixup fixup fixup
+'
+
+test_expect_success 'fixup! squash!' '
+	test_auto_fixup_fixup fixup squash
+'
+
+test_expect_success 'squash! squash!' '
+	test_auto_fixup_fixup squash squash
+'
+
+test_expect_success 'squash! fixup!' '
+	test_auto_fixup_fixup squash fixup
+'
+
 test_done

@@ -601,8 +601,13 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 			if (!c)
 				die(_("could not lookup commit %s"), squash_message);
 			ctx.output_encoding = get_commit_output_encoding();
-			format_commit_message(c, "squash! %s\n\n", &sb,
-					      &ctx);
+			format_commit_message(c, "%s\n\n", &sb, &ctx);
+			if (!prefixcmp(sb.buf, "fixup! ")) {
+				strbuf_remove(&sb, 0, strlen("fixup! "));
+			} else if (!prefixcmp(sb.buf, "squash! ")) {
+				strbuf_remove(&sb, 0, strlen("squash! "));
+			}
+			strbuf_insert(&sb, 0, "squash! ", strlen("squash! "));
 		}
 	}
 

@@ -634,8 +639,13 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 		if (!commit)
 			die(_("could not lookup commit %s"), fixup_message);
 		ctx.output_encoding = get_commit_output_encoding();
-		format_commit_message(commit, "fixup! %s\n\n",
-				      &sb, &ctx);
+		format_commit_message(commit, "%s\n\n", &sb, &ctx);
+		if (!prefixcmp(sb.buf, "fixup! ")) {
+			strbuf_remove(&sb, 0, strlen("fixup! "));
+		} else if (!prefixcmp(sb.buf, "squash! ")) {
+			strbuf_remove(&sb, 0, strlen("squash! "));
+		}
+		strbuf_insert(&sb, 0, "fixup! ", strlen("fixup! "));
 		hook_arg1 = "message";
 	} else if (!stat(git_path("MERGE_MSG"), &statbuf)) {
 		if (strbuf_read_file(&sb, git_path("MERGE_MSG"), 0) < 0)

@@ -320,4 +320,40 @@ test_expect_success 'invalid message options when using --fixup' '
 	test_must_fail git commit --fixup HEAD~1 -F log
 '
 
+test_expect_success 'commit --fixup of existing fixup' '
+	commit_for_rebase_autosquash_setup &&
+	git commit --fixup HEAD~1 &&
+	echo "fourth content line" >>foo &&
+	git add foo
+	git commit --fixup HEAD &&
+	commit_msg_is "fixup! target message subject line"
+'
+
+test_expect_success 'commit --fixup of existing squash' '
+	commit_for_rebase_autosquash_setup &&
+	git commit --squash HEAD~1 &&
+	echo "fourth content line" >>foo &&
+	git add foo
+	git commit --fixup HEAD &&
+	commit_msg_is "fixup! target message subject line"
+'
+
+test_expect_success 'commit --squash of existing squash' '
+	commit_for_rebase_autosquash_setup &&
+	git commit --squash HEAD~1 &&
+	echo "fourth content line" >>foo &&
+	git add foo
+	git commit --squash HEAD &&
+	commit_msg_is "squash! target message subject linecommit message"
+'
+
+test_expect_success 'commit --squash of existing fixup' '
+	commit_for_rebase_autosquash_setup &&
+	git commit --fixup HEAD~1 &&
+	echo "fourth content line" >>foo &&
+	git add foo
+	git commit --squash HEAD &&
+	commit_msg_is "squash! target message subject linecommit message"
+'
+
 test_done