bisect run: keep some of the post-v2.30.0 output

Preceding commits fixed output and behavior regressions in
d1bbbe4 (bisect--helper: reimplement `bisect_run` shell function
in C, 2021-09-13), which did not claim to be changing the output of
"git bisect run".

But some of the output it emitted was subjectively better, so once
we've asserted that we're back on v2.29.0 behavior, let's change some
of it back:

- We now quote the arguments again, but omit the first " " when
  printing the "running" line.
- Ditto for other cases where we emitted the argument
- We say "found first bad commit" again, not just "run success"

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Based-on-patch-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Đoàn Trần Công Danh <[email protected]>
Signed-off-by: Taylor Blau <[email protected]>

Author: sgn

builtin/bisect--helper.c

@@ -1141,17 +1141,17 @@ static int get_first_good(const char *refname UNUSED,
 	return 1;
 }
 
-static int do_bisect_run(const char *command, const char *unquoted_cmd)
+static int do_bisect_run(const char *command)
 {
 	struct child_process cmd = CHILD_PROCESS_INIT;
 
-	printf(_("running %s\n"), unquoted_cmd);
+	printf(_("running %s\n"), command);
 	cmd.use_shell = 1;
 	strvec_push(&cmd.args, command);
 	return run_command(&cmd);
 }
 
-static int verify_good(const struct bisect_terms *terms, const char *command, const char *unquoted_cmd)
+static int verify_good(const struct bisect_terms *terms, const char *command)
 {
 	int rc;
 	enum bisect_error res;
@@ -1171,7 +1171,7 @@ static int verify_good(const struct bisect_terms *terms, const char *command, co
 	if (res != BISECT_OK)
 		return -1;
 
-	rc = do_bisect_run(command, unquoted_cmd);
+	rc = do_bisect_run(command);
 
 	res = bisect_checkout(&current_rev, no_checkout);
 	if (res != BISECT_OK)
@@ -1184,7 +1184,6 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 {
 	int res = BISECT_OK;
 	struct strbuf command = STRBUF_INIT;
-	struct strbuf unquoted = STRBUF_INIT;
 	const char *new_state;
 	int temporary_stdout_fd, saved_stdout;
 	int is_first_run = 1;
@@ -1198,9 +1197,9 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 	}
 
 	sq_quote_argv(&command, argv);
-	strbuf_join_argv(&unquoted, argc, argv,' ');
+	strbuf_ltrim(&command);
 	while (1) {
-		res = do_bisect_run(command.buf, unquoted.buf);
+		res = do_bisect_run(command.buf);
 
 		/*
 		 * Exit code 126 and 127 can either come from the shell
@@ -1210,11 +1209,11 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 		 * missing or non-executable script.
 		 */
 		if (is_first_run && (res == 126 || res == 127)) {
-			int rc = verify_good(terms, command.buf, unquoted.buf);
+			int rc = verify_good(terms, command.buf);
 			is_first_run = 0;
 			if (rc < 0) {
-				error(_("unable to verify '%s' on good"
-					" revision"), unquoted.buf);
+				error(_("unable to verify %s on good"
+					" revision"), command.buf);
 				res = BISECT_FAILED;
 				break;
 			}
@@ -1228,7 +1227,7 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 
 		if (res < 0 || 128 <= res) {
 			error(_("bisect run failed: exit code %d from"
-				" '%s' is < 0 or >= 128"), res, unquoted.buf);
+				" %s is < 0 or >= 128"), res, command.buf);
 			break;
 		}
 
@@ -1265,7 +1264,7 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 			puts(_("bisect run success"));
 			res = BISECT_OK;
 		} else if (res == BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND) {
-			puts(_("bisect run success"));
+			puts(_("bisect found first bad commit"));
 			res = BISECT_OK;
 		} else if (res) {
 			error(_("bisect run failed: 'bisect-state %s'"
@@ -1276,7 +1275,6 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 		break;
 	}
 
-	strbuf_release(&unquoted);
 	strbuf_release(&command);
 	return res;
 }

t/t6030-bisect-porcelain.sh

@@ -288,9 +288,9 @@ test_bisect_run_args () {
 test_expect_success 'git bisect run: args, stdout and stderr with no arguments' "
 	test_bisect_run_args <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
 	EOF_ARGS
-	running ./run.sh
+	running './run.sh'
 	$HASH4 is the first bad commit
-	bisect run success
+	bisect found first bad commit
 	EOF_OUT
 	EOF_ERR
 "
@@ -299,9 +299,9 @@ test_expect_success 'git bisect run: args, stdout and stderr: "--" argument' "
 	test_bisect_run_args -- <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
 	<-->
 	EOF_ARGS
-	running ./run.sh --
+	running './run.sh' '--'
 	$HASH4 is the first bad commit
-	bisect run success
+	bisect found first bad commit
 	EOF_OUT
 	EOF_ERR
 "
@@ -313,9 +313,9 @@ test_expect_success 'git bisect run: args, stdout and stderr: "--log foo --no-lo
 	<--no-log>
 	<bar>
 	EOF_ARGS
-	running ./run.sh --log foo --no-log bar
+	running './run.sh' '--log' 'foo' '--no-log' 'bar'
 	$HASH4 is the first bad commit
-	bisect run success
+	bisect found first bad commit
 	EOF_OUT
 	EOF_ERR
 "
@@ -324,13 +324,52 @@ test_expect_success 'git bisect run: args, stdout and stderr: "--bisect-start" a
 	test_bisect_run_args --bisect-start <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
 	<--bisect-start>
 	EOF_ARGS
-	running ./run.sh --bisect-start
+	running './run.sh' '--bisect-start'
 	$HASH4 is the first bad commit
-	bisect run success
+	bisect found first bad commit
 	EOF_OUT
 	EOF_ERR
 "
 
+test_expect_success 'git bisect run: negative exit code' "
+	write_script fail.sh <<-'EOF' &&
+	exit 255
+	EOF
+	cat <<-'EOF' >expect &&
+	bisect run failed: exit code -1 from './fail.sh' is < 0 or >= 128
+	EOF
+	test_when_finished 'git bisect reset' &&
+	git bisect start &&
+	git bisect good $HASH1 &&
+	git bisect bad $HASH4 &&
+	! git bisect run ./fail.sh 2>err &&
+	sed -En 's/.*(bisect.*code) (-?[0-9]+) (from.*)/\1 -1 \3/p' err >actual &&
+	test_cmp expect actual
+"
+
+test_expect_failure 'git bisect run: unable to verify on good' "
+	write_script fail.sh <<-'EOF' &&
+	head=\$(git rev-parse --verify HEAD)
+	good=\$(git rev-parse --verify $HASH1)
+	if test "\$head" = "\$good"
+	then
+		exit 255
+	else
+		exit 127
+	fi
+	EOF
+	cat <<-'EOF' >expect &&
+	unable to verify './fail.sh' on good revision
+	EOF
+	test_when_finished 'git bisect reset' &&
+	git bisect start &&
+	git bisect good $HASH1 &&
+	git bisect bad $HASH4 &&
+	! git bisect run ./fail.sh 2>err &&
+	sed -n 's/.*\(unable to verify.*\)/\1/p' err >actual &&
+	test_cmp expect actual
+"
+
 # We want to automatically find the commit that
 # added "Another" into hello.
 test_expect_success '"git bisect run" simple case' '