bisect: fix output regressions in v2.30.0

When d1bbbe4 (bisect--helper: reimplement `bisect_run` shell
function in C, 2021-09-13) reimplemented parts of "git bisect run" in
C it changed the output we emitted so that:

 - The "running ..." line was now quoted
 - We lost the \n after our output
 - We started saying "bisect found ..." instead of "bisect run success"

Arguably some of this is better now, but as d1bbbe4 did not
advocate for changing the output, let's revert this for now. It'll be
easy to change it back if that's what we'd prefer.

This does not change the one remaining use of "command.buf" to emit
the quoted argument, as that's new in d1bbbe4.

Some of these cases were not tested for in the tests added in the
preceding commit, I didn't have time to fleshen those out, but a look
at f1de981 will show that the other output being adjusted here is
now equivalent to what it was before d1bbbe4.

Signed-off-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)
+static int do_bisect_run(const char *command, const char *unquoted_cmd)
 {
 	struct child_process cmd = CHILD_PROCESS_INIT;
 
-	printf(_("running %s\n"), command);
+	printf(_("running %s\n"), unquoted_cmd);
 	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)
+static int verify_good(const struct bisect_terms *terms, const char *command, const char *unquoted_cmd)
 {
 	int rc;
 	enum bisect_error res;
@@ -1171,7 +1171,7 @@ static int verify_good(const struct bisect_terms *terms, const char *command)
 	if (res != BISECT_OK)
 		return -1;
 
-	rc = do_bisect_run(command);
+	rc = do_bisect_run(command, unquoted_cmd);
 
 	res = bisect_checkout(&current_rev, no_checkout);
 	if (res != BISECT_OK)
@@ -1184,6 +1184,7 @@ 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;
@@ -1197,8 +1198,9 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 	}
 
 	sq_quote_argv(&command, argv);
+	strbuf_join_argv(&unquoted, argc, argv,' ');
 	while (1) {
-		res = do_bisect_run(command.buf);
+		res = do_bisect_run(command.buf, unquoted.buf);
 
 		/*
 		 * Exit code 126 and 127 can either come from the shell
@@ -1208,11 +1210,11 @@ 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);
+			int rc = verify_good(terms, command.buf, unquoted.buf);
 			is_first_run = 0;
 			if (rc < 0) {
 				error(_("unable to verify '%s' on good"
-					" revision"), command.buf);
+					" revision"), unquoted.buf);
 				res = BISECT_FAILED;
 				break;
 			}
@@ -1226,7 +1228,7 @@ 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, command.buf);
+				" '%s' is < 0 or >= 128"), res, unquoted.buf);
 			break;
 		}
 
@@ -1260,20 +1262,21 @@ static int bisect_run(struct bisect_terms *terms, const char **argv, int argc)
 		if (res == BISECT_ONLY_SKIPPED_LEFT)
 			error(_("bisect run cannot continue any more"));
 		else if (res == BISECT_INTERNAL_SUCCESS_MERGE_BASE) {
-			printf(_("bisect run success"));
+			puts(_("bisect run success"));
 			res = BISECT_OK;
 		} else if (res == BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND) {
-			printf(_("bisect found first bad commit"));
+			puts(_("bisect run success"));
 			res = BISECT_OK;
 		} else if (res) {
-			error(_("bisect run failed: 'git bisect--helper --bisect-state"
-				" %s' exited with error code %d"), new_state, res);
+			error(_("bisect run failed: 'bisect-state %s'"
+				" exited with error code %d"), new_state, res);
 		} else {
 			continue;
 		}
 		break;
 	}
 
+	strbuf_release(&unquoted);
 	strbuf_release(&command);
 	return res;
 }

t/t6030-bisect-porcelain.sh

@@ -285,7 +285,7 @@ test_bisect_run_args () {
 	test_cmp expect.args actual.args
 }
 
-test_expect_failure 'git bisect run: args, stdout and stderr with no arguments' "
+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
@@ -295,7 +295,7 @@ test_expect_failure 'git bisect run: args, stdout and stderr with no arguments'
 	EOF_ERR
 "
 
-test_expect_failure 'git bisect run: args, stdout and stderr: "--" argument' "
+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
@@ -306,7 +306,7 @@ test_expect_failure 'git bisect run: args, stdout and stderr: "--" argument' "
 	EOF_ERR
 "
 
-test_expect_failure 'git bisect run: args, stdout and stderr: "--log foo --no-log bar" arguments' "
+test_expect_success 'git bisect run: args, stdout and stderr: "--log foo --no-log bar" arguments' "
 	test_bisect_run_args --log foo --no-log bar <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
 	<--log>
 	<foo>
@@ -320,7 +320,7 @@ test_expect_failure 'git bisect run: args, stdout and stderr: "--log foo --no-lo
 	EOF_ERR
 "
 
-test_expect_failure 'git bisect run: args, stdout and stderr: "--bisect-start" argument' "
+test_expect_success 'git bisect run: args, stdout and stderr: "--bisect-start" argument' "
 	test_bisect_run_args --bisect-start <<-'EOF_ARGS' 6<<-EOF_OUT 7<<-'EOF_ERR'
 	<--bisect-start>
 	EOF_ARGS