[PATCH v2 5/5] rebase: add --reset-author-date

[Phillip Wood <phillip.wood123@gmail.com>]

From: Rohit Ashiwal <rohit.ashiwal265@gmail.com>

The previous commit introduced --ignore-date flag to rebase -i, but the
name is rather vague as it does not say whether the author date or the
committer date is ignored. Add an alias to convey the precise purpose.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
---
 Documentation/git-rebase.txt   |  1 +
 builtin/rebase.c               |  6 ++++--
 t/t3436-rebase-more-options.sh | 34 ++++++++++++++++++++++------------
 3 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index 96c7125791..0020b97110 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -443,6 +443,7 @@ See also INCOMPATIBLE OPTIONS below.
 	date. This option implies --force-rebase.
 
 --ignore-date::
+--reset-author-date::
 	Instead of using the author date of the original commit, use
 	the current time as the	author date of the rebased commit.  This
 	option implies `--force-rebase`.
diff --git a/builtin/rebase.c b/builtin/rebase.c
index cf86240bc8..911587690b 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -1519,8 +1519,10 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 		OPT_BOOL(0, "committer-date-is-author-date",
 			 &options.committer_date_is_author_date,
 			 N_("make committer date match author date")),
-		OPT_BOOL(0, "ignore-date", &options.ignore_date,
-			 "ignore author date and use current date"),
+		OPT_BOOL(0, "reset-author-date", &options.ignore_date,
+			 N_("ignore author date and use current date")),
+		OPT_HIDDEN_BOOL(0, "ignore-date", &options.ignore_date,
+				N_("synonym of --reset-author-date")),
 		OPT_PASSTHRU_ARGV('C', NULL, &options.git_am_opts, N_("n"),
 				  N_("passed to 'git apply'"), 0),
 		OPT_BOOL(0, "ignore-whitespace", &options.ignore_whitespace,
diff --git a/t/t3436-rebase-more-options.sh b/t/t3436-rebase-more-options.sh
index 6cd3848689..2ee7346562 100755
--- a/t/t3436-rebase-more-options.sh
+++ b/t/t3436-rebase-more-options.sh
@@ -137,22 +137,22 @@ test_expect_success '--committer-date-is-author-date works when committing confl
 # Checking for +0000 in author time is enough since default
 # timezone is UTC, but the timezone used while committing
 # sets to +0530.
-test_expect_success '--ignore-date works with apply backend' '
+test_expect_success '--reset-author-date works with apply backend' '
 	git commit --amend --date="$GIT_AUTHOR_DATE" &&
-	git rebase --apply --ignore-date HEAD^ &&
+	git rebase --apply --reset-author-date HEAD^ &&
 	git log -1 --pretty="format:%ai" >authortime &&
 	grep "+0000" authortime
 '
 
-test_expect_success '--ignore-date works with merge backend' '
+test_expect_success '--reset-author-date works with merge backend' '
 	git commit --amend --date="$GIT_AUTHOR_DATE" &&
-	git rebase --ignore-date -m HEAD^ &&
+	git rebase --reset-author-date -m HEAD^ &&
 	git log -1 --pretty="format:%ai" >authortime &&
 	grep "+0000" authortime
 '
 
-test_expect_success '--ignore-date works after conflict resolution' '
-	test_must_fail git rebase --ignore-date -m \
+test_expect_success '--reset-author-date works after conflict resolution' '
+	test_must_fail git rebase --reset-author-date -m \
 		--onto commit2^^ commit2^ commit2 &&
 	echo resolved >foo &&
 	git add foo &&
@@ -161,17 +161,17 @@ test_expect_success '--ignore-date works after conflict resolution' '
 	grep +0000 authortime
 '
 
-test_expect_success '--ignore-date works with rebase -r' '
+test_expect_success '--reset-author-date works with rebase -r' '
 	git checkout side &&
 	git merge --no-ff commit3 &&
-	git rebase -r --root --ignore-date &&
+	git rebase -r --root --reset-author-date &&
 	git log --pretty=%ai >authortime &&
 	! grep -v "+0000" authortime
 '
 
-test_expect_success '--ignore-date with --committer-date-is-author-date works' '
+test_expect_success '--reset-author-date with --committer-date-is-author-date works' '
 	test_must_fail git rebase -m --committer-date-is-author-date \
-		--ignore-date --onto commit2^^ commit2^ commit3 &&
+		--reset-author-date --onto commit2^^ commit2^ commit3 &&
 	git checkout --theirs foo &&
 	git add foo &&
 	git rebase --continue &&
@@ -181,16 +181,26 @@ test_expect_success '--ignore-date with --committer-date-is-author-date works' '
 	! grep -v "+0000" authortime
 '
 
-test_expect_success '--ignore-date --committer-date-is-author-date works when forking merge' '
+test_expect_success '--reset-author-date --committer-date-is-author-date works when forking merge' '
 	GIT_SEQUENCE_EDITOR="echo \"merge -C $(git rev-parse HEAD) commit3\">" \
-		git rebase -i --strategy=resolve --ignore-date \
+		git rebase -i --strategy=resolve --reset-author-date \
 		--committer-date-is-author-date side side &&
 	git log -1 --pretty=%ai >authortime &&
 	git log -1 --pretty=%ci >committertime &&
 	test_cmp authortime committertime &&
 	grep "+0000" authortime
  '
 
+test_expect_success '--ignore-date is an alias for --reset-author-date' '
+	git commit --amend --date="$GIT_AUTHOR_DATE" &&
+	git rebase --apply --ignore-date HEAD^ &&
+	git commit --allow-empty -m empty --date="$GIT_AUTHOR_DATE" &&
+	git rebase -m --ignore-date HEAD^ &&
+	git log -2 --pretty="format:%ai" >authortime &&
+	grep "+0000" authortime >output &&
+	test_line_count = 2 output
+'
+
 # This must be the last test in this file
 test_expect_success '$EDITOR and friends are unchanged' '
 	test_editor_unchanged
-- 
2.26.2