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[PATCH 14/16] revert: clarify label on conflict hunks

From
Jonathan Nieder <jrnieder@gmail.com>
Date
Mar 17, 2010, 12:19 UTC
Message-ID
<20100317121938.GN25641@progeny.tock>
In-Reply-To
<20100317113655.GA25470@progeny.tock>

When reverting a commit, the commit being merged is not the commit to revert itself but its parent. Clarify the text in conflict hunks to explain this.

Example:
	<<<<<<< HEAD
	Something old.
	Something new.
	Something blue.
	=======
	Something old.
	Something rotten.
	Something blue.
	>>>>>>> parent of ac789a9... Remove rotten line
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
New patch: a small fix.
 builtin/revert.c                |   14 +++++++++-----
 t/t3507-cherry-pick-conflict.sh |    4 ++--
 2 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/builtin/revert.c b/builtin/revert.c
index 6a47655..56f2947 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -73,11 +73,11 @@ static void parse_args(int argc, const char **argv)
 		exit(1);
 }
 
-static char *get_oneline(const char *message, char **body)
+static char *get_oneline(const char *message, int revert, char **body)
 {
 	char *result, *q;
-	const char *p = message, *abbrev, *eol;
-	int abbrev_len, oneline_len;
+	const char *p = message, *prefix, *abbrev, *eol;
+	int prefix_len, abbrev_len, oneline_len;
 
 	if (!p)
 		die ("Could not read commit message of %s",
@@ -91,10 +91,14 @@ static char *get_oneline(const char *message, char **body)
 			; /* do nothing */
 	} else
 		eol = p;
+	prefix = revert ? "parent of " : "";
+	prefix_len = revert ? strlen("parent of ") : 0;
 	abbrev = find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV);
 	abbrev_len = strlen(abbrev);
 	oneline_len = eol - p;
-	q = result = xmalloc(abbrev_len + strlen("... ") + oneline_len + 1);
+	q = result = xmalloc(prefix_len + abbrev_len +
+			     strlen("... ") + oneline_len + 1);
+	q = mempcpy(q, prefix, prefix_len);
 	q = mempcpy(q, abbrev, abbrev_len);
 	*body = q = mempcpy(q, "... ", strlen("... "));
 	q = mempcpy(q, p, oneline_len);
@@ -341,7 +345,7 @@ static int revert_or_cherry_pick(int argc, const char **argv)
 					git_commit_encoding, encoding)))
 		message = reencoded_message;
 
-	oneline = get_oneline(message, &oneline_body);
+	oneline = get_oneline(message, action == REVERT, &oneline_body);
 
 	if (action == REVERT) {
 		base = commit;
diff --git a/t/t3507-cherry-pick-conflict.sh b/t/t3507-cherry-pick-conflict.sh
index e856356..6a20817 100644
--- a/t/t3507-cherry-pick-conflict.sh
+++ b/t/t3507-cherry-pick-conflict.sh
@@ -138,7 +138,7 @@ test_expect_success 'revert also handles conflicts sanely' '
 	a
 	=======
 	b
-	>>>>>>> objid picked
+	>>>>>>> parent of objid picked
 	EOF
 	{
 		git checkout picked -- foo &&
@@ -183,7 +183,7 @@ test_expect_success 'revert conflict, diff3 -m style' '
 	c
 	=======
 	b
-	>>>>>>> objid picked
+	>>>>>>> parent of objid picked
 	EOF
 
 	git update-index --refresh &&
-- 
1.7.0
Previous: Jonathan NiederNext: Jonathan Nieder
Message 21 of 23 in “Add label for common ancestor to conflictstyle=diff3”
  1. 0/16 Add label for common ancestor to conflictstyle=diff3Jonathan Nieder, Mar 17, 2010
  2. 01/16 xdl_merge(): add optional ancestor label to diff3-style outputJonathan Nieder, Mar 17, 2010
  3. Bert WesargMar 17, 2010
  4. Jonathan NiederMar 20, 2010
  5. 02/16 xdl_merge(): move file1 and file2 labels to xmparam structureJonathan Nieder, Mar 17, 2010
  6. 03/16 merge-file --diff3: add a label for ancestorJonathan Nieder, Mar 17, 2010
  7. 04/16 ll_merge(): add ancestor label parameter for diff3-style outputJonathan Nieder, Mar 17, 2010
  8. 05/16 checkout --conflict=diff3: add a label for ancestorJonathan Nieder, Mar 17, 2010
  9. 06/16 merge_file(): add comment explaining behavior wrt conflict styleJonathan Nieder, Mar 17, 2010
  10. 07/16 merge_trees(): add ancestor label parameter for diff3-style outputJonathan Nieder, Mar 17, 2010
  11. 08/16 tests: document format of conflicts from checkout -mJonathan Nieder, Mar 17, 2010
  12. 09/16 checkout -m --conflict=diff3: add a label for ancestorJonathan Nieder, Mar 17, 2010
  13. 10/16 tests: document cherry-pick behavior in face of conflictsJonathan Nieder, Mar 17, 2010
  14. 11/16 revert_or_cherry_pick(): get oneline_body from get_oneline()Jonathan Nieder, Mar 17, 2010
  15. Stephen BoydMar 17, 2010
  16. Jonathan NiederMar 18, 2010
  17. revert: clarify label on conflict hunksJonathan Nieder, Mar 18, 2010
  18. 15/16 cherry-pick, revert: add a label for ancestorJonathan Nieder, Mar 18, 2010
  19. 12/16 compat: add mempcpy()Jonathan Nieder, Mar 17, 2010
  20. 13/16 revert: simplify get_oneline() using mempcpyJonathan Nieder, Mar 17, 2010
  21. 14/16 revert: clarify label on conflict hunksJonathan Nieder, Mar 17, 2010
  22. 15/16 cherry-pick: add a label for ancestorJonathan Nieder, Mar 17, 2010
  23. 16/16 merge-recursive: add a label for ancestorJonathan Nieder, Mar 17, 2010

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