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From: Miriam Rubio <mirucam@gmail.com>
To: git@vger.kernel.org
Cc: Pranit Bauva <pranit.bauva@gmail.com>,
	Christian Couder <chriscool@tuxfamily.org>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Tanushree Tumane <tanushreetumane@gmail.com>,
	Miriam Rubio <mirucam@gmail.com>
Subject: [PATCH 06/29] bisect: libify `exit_if_skipped_commits` to `error_if_skipped*` and its dependents
Date: Mon, 20 Jan 2020 15:37:37 +0100	[thread overview]
Message-ID: <20200120143800.900-7-mirucam@gmail.com> (raw)
In-Reply-To: <20200120143800.900-1-mirucam@gmail.com>

From: Pranit Bauva <pranit.bauva@gmail.com>

Since we want to get rid of git-bisect.sh it would be necessary to
convert those exit() calls to return statements so that errors can be
reported.

Emulate try catch in C by converting `exit(<positive-value>)` to
`return <negative-value>`. Follow POSIX conventions to return
<negative-value> to indicate error.
Modify `cmd_bisect_helper()` to handle these negative returns.

Turn `exit()` to `return` calls in `exit_if_skipped_commits()` and rename
the method to `error_if_skipped_commits()`.

Handle this return in dependant function `bisect_next_all()`.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
Signed-off-by: Tanushree Tumane <tanushreetumane@gmail.com>
Signed-off-by: Miriam Rubio <mirucam@gmail.com>
---
 bisect.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/bisect.c b/bisect.c
index 83cb5b3a98..2ac0463327 100644
--- a/bisect.c
+++ b/bisect.c
@@ -661,11 +661,11 @@ static void bisect_common(struct rev_info *revs)
 		mark_edges_uninteresting(revs, NULL, 0);
 }
 
-static void exit_if_skipped_commits(struct commit_list *tried,
+static int error_if_skipped_commits(struct commit_list *tried,
 				    const struct object_id *bad)
 {
 	if (!tried)
-		return;
+		return 0;
 
 	printf("There are only 'skip'ped commits left to test.\n"
 	       "The first %s commit could be any of:\n", term_bad);
@@ -676,7 +676,13 @@ static void exit_if_skipped_commits(struct commit_list *tried,
 	if (bad)
 		printf("%s\n", oid_to_hex(bad));
 	printf(_("We cannot bisect more!\n"));
-	exit(2);
+
+	/*
+	 * We don't want to clean the bisection state
+	 * as we need to get back to where we started
+	 * by using `git bisect reset`.
+	 */
+	return -2;
 }
 
 static int is_expected_rev(const struct object_id *oid)
@@ -949,7 +955,7 @@ int bisect_next_all(struct repository *r, const char *prefix, int no_checkout)
 {
 	struct rev_info revs;
 	struct commit_list *tried;
-	int reaches = 0, all = 0, nr, steps;
+	int reaches = 0, all = 0, nr, steps, res;
 	struct object_id *bisect_rev;
 	char *steps_msg;
 
@@ -972,8 +978,9 @@ int bisect_next_all(struct repository *r, const char *prefix, int no_checkout)
 		 * We should exit here only if the "bad"
 		 * commit is also a "skip" commit.
 		 */
-		exit_if_skipped_commits(tried, NULL);
-
+		res = error_if_skipped_commits(tried, NULL);
+		if (res)
+			exit(-res);
 		printf(_("%s was both %s and %s\n"),
 		       oid_to_hex(current_bad_oid),
 		       term_good,
@@ -990,7 +997,9 @@ int bisect_next_all(struct repository *r, const char *prefix, int no_checkout)
 	bisect_rev = &revs.commits->item->object.oid;
 
 	if (oideq(bisect_rev, current_bad_oid)) {
-		exit_if_skipped_commits(tried, current_bad_oid);
+		res = error_if_skipped_commits(tried, current_bad_oid);
+		if (res)
+			exit(-res);
 		printf("%s is the first %s commit\n", oid_to_hex(bisect_rev),
 			term_bad);
 		show_diff_tree(r, prefix, revs.commits->item);
-- 
2.21.1 (Apple Git-122.3)


  parent reply	other threads:[~2020-01-20 14:38 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20 14:37 [Outreachy][PATCH 00/29] Finish converting git bisect to C part 1 Miriam Rubio
2020-01-20 14:37 ` [PATCH 01/29] bisect--helper: convert `vocab_*` char pointers to char arrays Miriam Rubio
2020-01-20 14:37 ` [PATCH 02/29] bisect--helper: change `retval` to `res` Miriam Rubio
2020-01-20 14:37 ` [PATCH 03/29] bisect: use the standard 'if (!var)' way to check for 0 Miriam Rubio
2020-01-20 14:37 ` [PATCH 04/29] run-command: make `exists_in_PATH()` non-static Miriam Rubio
2020-01-20 14:37 ` [PATCH 05/29] bisect--helper: introduce new `decide_next()` function Miriam Rubio
2020-01-20 14:37 ` Miriam Rubio [this message]
2020-01-20 21:57   ` [PATCH 06/29] bisect: libify `exit_if_skipped_commits` to `error_if_skipped*` and its dependents Johannes Schindelin
2020-01-21  6:40     ` Christian Couder
2020-01-21 10:00       ` Miriam R.
2020-01-20 14:37 ` [PATCH 07/29] bisect: libify `bisect_checkout` Miriam Rubio
2020-01-20 14:37 ` [PATCH 08/29] bisect: libify `check_merge_bases` and its dependents Miriam Rubio
2020-01-20 22:09   ` Johannes Schindelin
2020-01-21  9:59     ` Miriam R.
2020-01-20 14:37 ` [PATCH 09/29] bisect: libify `check_good_are_ancestors_of_bad` " Miriam Rubio
2020-01-20 22:20   ` Johannes Schindelin
2020-01-21  6:59     ` Christian Couder
2020-01-21 10:00       ` Miriam R.
2020-01-20 14:37 ` [PATCH 10/29] bisect: libify `handle_bad_merge_base` " Miriam Rubio
2020-01-20 22:23   ` Johannes Schindelin
2020-01-21  7:05     ` Christian Couder
2020-01-21 10:00       ` Miriam R.
2020-01-20 14:37 ` [PATCH 11/29] bisect: libify `bisect_next_all` Miriam Rubio
2020-01-20 22:29   ` Johannes Schindelin
2020-01-21  7:15     ` Christian Couder
2020-01-30 15:18       ` Johannes Schindelin
2020-01-20 14:37 ` [PATCH 12/29] bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell functions in C Miriam Rubio
2020-01-30 22:47   ` Johannes Schindelin
2020-01-31 10:53     ` Miriam R.
2020-02-17  7:20     ` Christian Couder
2020-02-17 22:00       ` Johannes Schindelin
2020-01-20 14:37 ` [PATCH 13/29] bisect--helper: finish porting `bisect_start()` to C Miriam Rubio
2020-01-20 14:37 ` [PATCH 14/29] bisect--helper: retire `--bisect-clean-state` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 15/29] bisect--helper: retire `--next-all` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 16/29] bisect--helper: reimplement `bisect_autostart` shell function in C Miriam Rubio
2020-01-20 14:37 ` [PATCH 17/29] bisect--helper: reimplement `bisect_state` & `bisect_head` shell functions " Miriam Rubio
2020-01-20 14:37 ` [PATCH 18/29] bisect--helper: retire `--check-expected-revs` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 19/29] bisect--helper: retire `--write-terms` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 20/29] bisect--helper: reimplement `bisect_log` shell function in C Miriam Rubio
2020-01-20 14:37 ` [PATCH 21/29] bisect--helper: reimplement `bisect_replay` " Miriam Rubio
2020-01-20 14:37 ` [PATCH 22/29] bisect--helper: retire `--bisect-write` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 23/29] bisect--helper: use `res` instead of return in BISECT_RESET case option Miriam Rubio
2020-01-20 14:37 ` [PATCH 24/29] bisect--helper: retire `--bisect-autostart` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 25/29] bisect--helper: retire `--bisect-auto-next` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 26/29] bisect--helper: reimplement `bisect_skip` shell function in C Miriam Rubio
2020-01-20 14:37 ` [PATCH 27/29] bisect--helper: retire `--check-and-set-terms` subcommand Miriam Rubio
2020-01-20 14:37 ` [PATCH 28/29] bisect--helper: reimplement `bisect_visualize()`shell function in C Miriam Rubio
2020-01-20 14:38 ` [PATCH 29/29] bisect--helper: reimplement `bisect_run` shell " Miriam Rubio
2020-01-20 21:41 ` [Outreachy][PATCH 00/29] Finish converting git bisect to C part 1 Johannes Schindelin
2020-01-20 23:24   ` Christian Couder
2020-01-30 15:12     ` Johannes Schindelin
2020-01-30 21:12       ` Junio C Hamano
2020-01-21  8:44   ` Miriam R.
2020-01-30 15:13     ` Johannes Schindelin

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