From: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
Kristoffer Haugsbakk <code@khaugsbakk.name>
Subject: [PATCH v2] sequencer: beautify subject of reverts of reverts
Date: Fri, 28 Apr 2023 10:35:28 +0200 [thread overview]
Message-ID: <20230428083528.1699221-1-oswald.buddenhagen@gmx.de> (raw)
Instead of generating a silly-looking `Revert "Revert "foo""`, make it
a more humane `Reapply "foo"`.
The alternative `Revert^2 "foo"`, etc. was considered, but it was deemed
over-engineered and "too nerdy". Instead, people should get creative
with the subjects when they recurse reverts that deeply. The proposed
change encourages that by example and explicit recommendation.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Cc: Junio C Hamano <gitster@pobox.com>
Cc: Kristoffer Haugsbakk <code@khaugsbakk.name>
---
v2:
- add discussion to commit message
- add paragraph to docu
- add test
- use skip_prefix() instead of starts_with()
- catch pre-existing double reverts
---
Documentation/git-revert.txt | 6 ++++++
sequencer.c | 14 ++++++++++++++
t/t3515-revert-subjects.sh | 32 ++++++++++++++++++++++++++++++++
3 files changed, 52 insertions(+)
create mode 100755 t/t3515-revert-subjects.sh
diff --git a/Documentation/git-revert.txt b/Documentation/git-revert.txt
index d2e10d3dce..e8fa513607 100644
--- a/Documentation/git-revert.txt
+++ b/Documentation/git-revert.txt
@@ -31,6 +31,12 @@ both will discard uncommitted changes in your working directory.
See "Reset, restore and revert" in linkgit:git[1] for the differences
between the three commands.
+The command generates the subject 'Revert "<title>"' for the resulting
+commit, assuming the original commit's subject is '<title>'. Reverting
+such a reversion commit in turn yields the subject 'Reapply "<title>"'.
+These can of course be modified in the editor when the reason for
+reverting is described.
+
OPTIONS
-------
<commit>...::
diff --git a/sequencer.c b/sequencer.c
index 3be23d7ca2..61e466470e 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2227,13 +2227,27 @@ static int do_pick_commit(struct repository *r,
*/
if (command == TODO_REVERT) {
+ const char *orig_subject;
+
base = commit;
base_label = msg.label;
next = parent;
next_label = msg.parent_label;
if (opts->commit_use_reference) {
strbuf_addstr(&msgbuf,
"# *** SAY WHY WE ARE REVERTING ON THE TITLE LINE ***");
+ } else if (skip_prefix(msg.subject, "Revert \"", &orig_subject)) {
+ if (skip_prefix(orig_subject, "Revert \"", &orig_subject)) {
+ /*
+ * This prevents the generation of somewhat unintuitive (even if
+ * not incorrect) 'Reapply "Revert "' titles from legacy double
+ * reverts. Fixing up deeper recursions is left to the user.
+ */
+ strbuf_addstr(&msgbuf, "Revert \"Reapply \"");
+ } else {
+ strbuf_addstr(&msgbuf, "Reapply \"");
+ }
+ strbuf_addstr(&msgbuf, orig_subject);
} else {
strbuf_addstr(&msgbuf, "Revert \"");
strbuf_addstr(&msgbuf, msg.subject);
diff --git a/t/t3515-revert-subjects.sh b/t/t3515-revert-subjects.sh
new file mode 100755
index 0000000000..ea4319fd15
--- /dev/null
+++ b/t/t3515-revert-subjects.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+test_description='git revert produces the expected subject'
+
+. ./test-lib.sh
+
+test_expect_success 'fresh reverts' '
+ test_commit --no-tag A file1 &&
+ test_commit --no-tag B file1 &&
+ git revert --no-edit HEAD &&
+ echo "Revert \"B\"" > expect &&
+ git log -1 --pretty=%s > actual &&
+ test_cmp expect actual &&
+ git revert --no-edit HEAD &&
+ echo "Reapply \"B\"" > expect &&
+ git log -1 --pretty=%s > actual &&
+ test_cmp expect actual &&
+ git revert --no-edit HEAD &&
+ echo "Revert \"Reapply \"B\"\"" > expect &&
+ git log -1 --pretty=%s > actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'legacy double revert' '
+ test_commit --no-tag "Revert \"Revert \"B\"\"" file1 &&
+ git revert --no-edit HEAD &&
+ echo "Revert \"Reapply \"B\"\"" > expect &&
+ git log -1 --pretty=%s > actual &&
+ test_cmp expect actual
+'
+
+test_done
--
2.40.0.152.g15d061e6df
next reply other threads:[~2023-04-28 8:35 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-28 8:35 Oswald Buddenhagen [this message]
2023-04-28 18:35 ` [PATCH v2] sequencer: beautify subject of reverts of reverts Junio C Hamano
2023-04-28 19:11 ` Oswald Buddenhagen
2023-05-01 16:44 ` Junio C Hamano
2023-05-01 19:10 ` Oswald Buddenhagen
2023-05-01 19:12 ` Junio C Hamano
2023-05-05 17:25 ` Junio C Hamano
2023-05-17 9:05 ` Phillip Wood
2023-05-17 10:00 ` Oswald Buddenhagen
2023-05-17 11:20 ` Phillip Wood
2023-05-17 17:02 ` Oswald Buddenhagen
2023-05-18 9:58 ` Phillip Wood
2023-05-18 16:28 ` Junio C Hamano
2023-07-28 5:26 ` Linus Arver
2023-07-28 9:45 ` Oswald Buddenhagen
2023-07-28 15:10 ` Junio C Hamano
2023-07-28 15:37 ` Oswald Buddenhagen
2023-07-28 16:31 ` Junio C Hamano
2023-07-28 16:47 ` Oswald Buddenhagen
2023-07-28 17:36 ` Linus Arver
2023-08-09 17:15 ` [PATCH v3 1/2] " Oswald Buddenhagen
2023-08-09 17:15 ` [PATCH v3 2/2] doc: revert: add discussion Oswald Buddenhagen
2023-08-10 21:50 ` Linus Arver
2023-08-10 22:00 ` Linus Arver
2023-08-11 15:10 ` Phillip Wood
2023-08-12 6:25 ` Oswald Buddenhagen
2023-08-13 22:09 ` Junio C Hamano
2023-08-14 14:13 ` Oswald Buddenhagen
2023-08-11 12:49 ` Oswald Buddenhagen
2023-08-11 23:00 ` Linus Arver
2023-08-12 7:19 ` Oswald Buddenhagen
2023-09-07 21:29 ` Linus Arver
2023-08-11 15:08 ` Phillip Wood
2023-08-11 17:10 ` Junio C Hamano
2023-08-11 17:05 ` Junio C Hamano
2023-08-11 17:44 ` Re* " Junio C Hamano
2023-08-11 17:53 ` Junio C Hamano
2023-08-11 17:56 ` rsbecker
2023-08-11 18:16 ` Eric Sunshine
2023-08-11 18:16 ` Oswald Buddenhagen
2023-08-11 19:43 ` Junio C Hamano
2023-08-11 15:05 ` [PATCH v3 1/2] sequencer: beautify subject of reverts of reverts Phillip Wood
2023-08-11 16:59 ` Junio C Hamano
2023-08-11 17:13 ` Oswald Buddenhagen
2023-08-21 17:07 ` [PATCH v4 " Oswald Buddenhagen
2023-08-21 17:07 ` [PATCH v4 2/2] git-revert.txt: add discussion Oswald Buddenhagen
2023-08-21 18:32 ` [PATCH v4 1/2] sequencer: beautify subject of reverts of reverts Junio C Hamano
2023-08-23 20:08 ` Taylor Blau
2023-08-23 21:38 ` Junio C Hamano
2023-08-24 6:14 ` Oswald Buddenhagen
2023-09-02 7:20 ` [PATCH v5] " Oswald Buddenhagen
2023-09-02 22:24 ` Junio C Hamano
2023-09-11 20:12 ` Kristoffer Haugsbakk
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