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From: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
To: rohit.ashiwal265@gmail.com
Cc: git@vger.kernel.org, newren@gmail.com, t.gummerer@gmail.com,
	phillip.wood123@gmail.com, martin.agren@gmail.com,
	jrnieder@gmail.com, gitster@pobox.com
Subject: [GSoC][PATCH v5 4/5] cherry-pick/revert: add --skip option
Date: Tue, 18 Jun 2019 22:36:49 +0530	[thread overview]
Message-ID: <20190618170650.22721-5-rohit.ashiwal265@gmail.com> (raw)
In-Reply-To: <20190618170650.22721-1-rohit.ashiwal265@gmail.com>

git am or rebase have a --skip flag to skip the current commit if the
user wishes to do so. During a cherry-pick or revert a user could
likewise skip a commit, but needs to use 'git reset' (or in the case
of conflicts 'git reset --merge'), followed by 'git (cherry-pick |
revert) --continue' to skip the commit. This is more annoying and
sometimes confusing on the users' part. Add a `--skip` option to make
skipping commits easier for the user and to make the commands more
consistent.

In the next commit, we will change the advice messages hence finishing
the process of teaching revert and cherry-pick "how to skip commits".

Signed-off-by: Rohit Ashiwal <rohit.ashiwal265@gmail.com>
---
 Documentation/git-cherry-pick.txt |   4 +-
 Documentation/git-revert.txt      |   4 +-
 Documentation/sequencer.txt       |   4 ++
 builtin/revert.c                  |   5 ++
 sequencer.c                       |  69 ++++++++++++++++++++
 sequencer.h                       |   1 +
 t/t3510-cherry-pick-sequence.sh   | 102 ++++++++++++++++++++++++++++++
 7 files changed, 183 insertions(+), 6 deletions(-)

diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt
index 754b16ce0c..83ce51aedf 100644
--- a/Documentation/git-cherry-pick.txt
+++ b/Documentation/git-cherry-pick.txt
@@ -10,9 +10,7 @@ SYNOPSIS
 [verse]
 'git cherry-pick' [--edit] [-n] [-m parent-number] [-s] [-x] [--ff]
 		  [-S[<keyid>]] <commit>...
-'git cherry-pick' --continue
-'git cherry-pick' --quit
-'git cherry-pick' --abort
+'git cherry-pick' (--continue | --skip | --abort | --quit)
 
 DESCRIPTION
 -----------
diff --git a/Documentation/git-revert.txt b/Documentation/git-revert.txt
index 0c82ca5bc0..665e065ee3 100644
--- a/Documentation/git-revert.txt
+++ b/Documentation/git-revert.txt
@@ -9,9 +9,7 @@ SYNOPSIS
 --------
 [verse]
 'git revert' [--[no-]edit] [-n] [-m parent-number] [-s] [-S[<keyid>]] <commit>...
-'git revert' --continue
-'git revert' --quit
-'git revert' --abort
+'git revert' (--continue | --skip | --abort | --quit)
 
 DESCRIPTION
 -----------
diff --git a/Documentation/sequencer.txt b/Documentation/sequencer.txt
index 5a57c4a407..3bceb56474 100644
--- a/Documentation/sequencer.txt
+++ b/Documentation/sequencer.txt
@@ -3,6 +3,10 @@
 	`.git/sequencer`.  Can be used to continue after resolving
 	conflicts in a failed cherry-pick or revert.
 
+--skip::
+	Skip the current commit and continue with the rest of the
+	sequence.
+
 --quit::
 	Forget about the current operation in progress.  Can be used
 	to clear the sequencer state after a failed cherry-pick or
diff --git a/builtin/revert.c b/builtin/revert.c
index d4dcedbdc6..5dc5891ea2 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -102,6 +102,7 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
 		OPT_CMDMODE(0, "quit", &cmd, N_("end revert or cherry-pick sequence"), 'q'),
 		OPT_CMDMODE(0, "continue", &cmd, N_("resume revert or cherry-pick sequence"), 'c'),
 		OPT_CMDMODE(0, "abort", &cmd, N_("cancel revert or cherry-pick sequence"), 'a'),
+		OPT_CMDMODE(0, "skip", &cmd, N_("skip current commit and continue"), 's'),
 		OPT_CLEANUP(&cleanup_arg),
 		OPT_BOOL('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
 		OPT_BOOL('e', "edit", &opts->edit, N_("edit the commit message")),
@@ -151,6 +152,8 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
 			this_operation = "--quit";
 		else if (cmd == 'c')
 			this_operation = "--continue";
+		else if (cmd == 's')
+			this_operation = "--skip";
 		else {
 			assert(cmd == 'a');
 			this_operation = "--abort";
@@ -210,6 +213,8 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
 		return sequencer_continue(the_repository, opts);
 	if (cmd == 'a')
 		return sequencer_rollback(the_repository, opts);
+	if (cmd == 's')
+		return sequencer_skip(the_repository, opts);
 	return sequencer_pick_revisions(the_repository, opts);
 }
 
diff --git a/sequencer.c b/sequencer.c
index 6762a5f485..5720cd1c85 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2761,6 +2761,15 @@ static int rollback_single_pick(struct repository *r)
 	return reset_merge(&head_oid);
 }
 
+static int skip_single_pick(void)
+{
+	struct object_id head;
+
+	if (read_ref_full("HEAD", 0, &head, NULL))
+		return error(_("cannot resolve HEAD"));
+	return reset_merge(&head);
+}
+
 int sequencer_rollback(struct repository *r, struct replay_opts *opts)
 {
 	FILE *f;
@@ -2810,6 +2819,66 @@ int sequencer_rollback(struct repository *r, struct replay_opts *opts)
 	return -1;
 }
 
+int sequencer_skip(struct repository *r, struct replay_opts *opts)
+{
+	enum replay_action action = -1;
+	sequencer_get_last_command(r, &action);
+
+	/*
+	 * Check whether the subcommand requested to skip the commit is actually
+	 * in progress and that it's safe to skip the commit.
+	 *
+	 * opts->action tells us which subcommand requested to skip the commit.
+	 * If the corresponding .git/<ACTION>_HEAD exists, we know that the
+	 * action is in progress and we can skip the commit.
+	 *
+	 * Otherwise we check that the last instruction was related to the
+	 * particular subcommand we're trying to execute and barf if that's not
+	 * the case.
+	 *
+	 * Finally we check that the rollback is "safe", i.e., has the HEAD
+	 * moved? In this case, it doesn't make sense to "reset the merge" and
+	 * "skip the commit" as the user already handled this by committing. But
+	 * we'd not want to barf here, instead give advice on how to proceed. We
+	 * only need to check that when .git/<ACTION>_HEAD doesn't exist because
+	 * it gets removed when the user commits, so if it still exists we're
+	 * sure the user can't have committed before.
+	 */
+	switch (opts->action) {
+	case REPLAY_REVERT:
+		if (!file_exists(git_path_revert_head(r))) {
+			if (action != REPLAY_REVERT)
+				return error(_("no revert in progress"));
+			if (!rollback_is_safe())
+				goto give_advice;
+		}
+		break;
+	case REPLAY_PICK:
+		if (!file_exists(git_path_cherry_pick_head(r))) {
+			if (action != REPLAY_PICK)
+				return error(_("no cherry-pick in progress"));
+			if (!rollback_is_safe())
+				goto give_advice;
+		}
+		break;
+	default:
+		BUG("unexpected action in sequencer_skip");
+	}
+
+	if (skip_single_pick())
+		return error(_("failed to skip the commit"));
+	if (!is_directory(git_path_seq_dir()))
+		return 0;
+
+	return sequencer_continue(r, opts);
+
+give_advice:
+	advise(_("have you committed already?\n"
+		 "try \"git %s --continue\""),
+		 action == REPLAY_REVERT ? "revert" : "cherry-pick");
+	return error(_("there is nothing to skip"));
+}
+
 static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
 {
 	struct lock_file todo_lock = LOCK_INIT;
diff --git a/sequencer.h b/sequencer.h
index 0c494b83d4..731b9853eb 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -129,6 +129,7 @@ int sequencer_pick_revisions(struct repository *repo,
 			     struct replay_opts *opts);
 int sequencer_continue(struct repository *repo, struct replay_opts *opts);
 int sequencer_rollback(struct repository *repo, struct replay_opts *opts);
+int sequencer_skip(struct repository *repo, struct replay_opts *opts);
 int sequencer_remove_state(struct replay_opts *opts);
 
 #define TODO_LIST_KEEP_EMPTY (1U << 0)
diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh
index 941d5026da..dc0ac8343c 100755
--- a/t/t3510-cherry-pick-sequence.sh
+++ b/t/t3510-cherry-pick-sequence.sh
@@ -93,6 +93,108 @@ test_expect_success 'cherry-pick cleans up sequencer state upon success' '
 	test_path_is_missing .git/sequencer
 '
 
+test_expect_success 'cherry-pick --skip requires cherry-pick in progress' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick --skip
+'
+
+test_expect_success 'revert --skip requires revert in progress' '
+	pristine_detach initial &&
+	test_must_fail git revert --skip
+'
+
+test_expect_success 'cherry-pick --skip to skip commit' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick anotherpick &&
+	test_must_fail git revert --skip &&
+	git cherry-pick --skip &&
+	test_cmp_rev initial HEAD &&
+	test_path_is_missing .git/CHERRY_PICK_HEAD
+'
+
+test_expect_success 'revert --skip to skip commit' '
+	pristine_detach anotherpick &&
+	test_must_fail git revert anotherpick~1 &&
+	test_must_fail git cherry-pick --skip &&
+	git revert --skip &&
+	test_cmp_rev anotherpick HEAD
+'
+
+test_expect_success 'skip "empty" commit' '
+	pristine_detach picked &&
+	test_commit dummy foo d &&
+	test_must_fail git cherry-pick anotherpick &&
+	git cherry-pick --skip &&
+	test_cmp_rev dummy HEAD
+'
+
+test_expect_success 'skip a commit and check if rest of sequence is correct' '
+	pristine_detach initial &&
+	echo e >expect &&
+	cat >expect.log <<-EOF &&
+	OBJID
+	:100644 100644 OBJID OBJID M	foo
+	OBJID
+	:100644 100644 OBJID OBJID M	foo
+	OBJID
+	:100644 100644 OBJID OBJID M	unrelated
+	OBJID
+	:000000 100644 OBJID OBJID A	foo
+	:000000 100644 OBJID OBJID A	unrelated
+	EOF
+	test_must_fail git cherry-pick base..yetanotherpick &&
+	test_must_fail git cherry-pick --skip &&
+	echo d >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+	{
+		git rev-list HEAD |
+		git diff-tree --root --stdin |
+		sed "s/$OID_REGEX/OBJID/g"
+	} >actual.log &&
+	test_cmp expect foo &&
+	test_cmp expect.log actual.log
+'
+
+test_expect_success 'check advice when we move HEAD by committing' '
+	pristine_detach initial &&
+	cat >expect <<-EOF &&
+	hint: have you committed already?
+	hint: try "git cherry-pick --continue"
+	error: there is nothing to skip
+	fatal: cherry-pick failed
+	EOF
+	test_must_fail git cherry-pick base..yetanotherpick &&
+	echo c >foo &&
+	git commit -a &&
+	test_path_is_missing .git/CHERRY_PICK_HEAD &&
+	test_must_fail git cherry-pick --skip 2>advice &&
+	test_i18ncmp expect advice
+'
+
+test_expect_success 'allow skipping commit but not abort for a new history' '
+	pristine_detach initial &&
+	cat >expect <<-EOF &&
+	error: cannot abort from a branch yet to be born
+	fatal: cherry-pick failed
+	EOF
+	git checkout --orphan new_disconnected &&
+	git reset --hard &&
+	test_must_fail git cherry-pick anotherpick &&
+	test_must_fail git cherry-pick --abort 2>advice &&
+	git cherry-pick --skip &&
+	test_i18ncmp expect advice
+'
+
+test_expect_success 'allow skipping stopped cherry-pick because of untracked file modifications' '
+	pristine_detach initial &&
+	git rm --cached unrelated &&
+	git commit -m "untrack unrelated" &&
+	test_must_fail git cherry-pick initial base &&
+	test_path_is_missing .git/CHERRY_PICK_HEAD &&
+	git cherry-pick --skip
+'
+
 test_expect_success '--quit does not complain when no cherry-pick is in progress' '
 	pristine_detach initial &&
 	git cherry-pick --quit
-- 
2.21.0


  parent reply	other threads:[~2019-06-18 17:09 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-08 19:19 [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-08 19:19 ` [GSoC][PATCH 1/3] sequencer: add advice for revert Rohit Ashiwal
2019-06-09 17:52   ` Phillip Wood
2019-06-10  5:13     ` Rohit Ashiwal
2019-06-10 10:39       ` Phillip Wood
2019-06-10 13:25         ` Rohit Ashiwal
2019-06-10 17:46           ` Phillip Wood
2019-06-10 16:34         ` Junio C Hamano
2019-06-08 19:19 ` [GSoC][PATCH 2/3] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-09  8:37   ` Thomas Gummerer
2019-06-09 18:01   ` Phillip Wood
2019-06-10  5:57     ` Rohit Ashiwal
2019-06-10 10:40       ` Phillip Wood
2019-06-10 13:43         ` Rohit Ashiwal
2019-06-10 17:47           ` Phillip Wood
2019-06-08 19:19 ` [GSoC][PATCH 3/3] cherry-pick/revert: update hints Rohit Ashiwal
2019-06-09  8:42   ` Thomas Gummerer
2019-06-09 18:03   ` Phillip Wood
2019-06-10  5:28     ` Rohit Ashiwal
2019-06-10 10:40       ` Phillip Wood
2019-06-10 13:33         ` Rohit Ashiwal
2019-06-10 17:47           ` Phillip Wood
2019-06-09  9:02 ` [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Thomas Gummerer
2019-06-09 10:06   ` Rohit Ashiwal
2019-06-09 20:00     ` Thomas Gummerer
2019-06-11  7:31 ` [GSoC][PATCH v2 " Rohit Ashiwal
2019-06-11  7:31   ` [GSoC][PATCH v2 1/3] sequencer: add advice for revert Rohit Ashiwal
2019-06-11 21:25     ` Junio C Hamano
2019-06-11  7:31   ` [GSoC][PATCH v2 2/3] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-12 13:31     ` Phillip Wood
2019-06-12 18:11       ` Junio C Hamano
2019-06-12 18:57         ` Phillip Wood
2019-06-11  7:31   ` [GSoC][PATCH v2 3/3] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-12 15:16     ` Phillip Wood
2019-06-13  4:05 ` [GSoC][PATCH v3 0/3] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-13  4:05   ` [GSoC][PATCH v3 1/3] sequencer: add advice for revert Rohit Ashiwal
2019-06-13 17:45     ` Phillip Wood
2019-06-13 19:21       ` Martin Ågren
2019-06-13 20:59         ` Junio C Hamano
2019-06-14  3:44         ` Rohit Ashiwal
2019-06-14  3:43       ` Rohit Ashiwal
2019-06-13  4:05   ` [GSoC][PATCH v3 2/3] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-13 17:56     ` Junio C Hamano
2019-06-13 19:57       ` Junio C Hamano
2019-06-14  3:48         ` Rohit Ashiwal
2019-06-14  3:45       ` Rohit Ashiwal
2019-06-14 15:58         ` Junio C Hamano
2019-06-16  7:03       ` Rohit Ashiwal
2019-06-13 17:59     ` Phillip Wood
2019-06-13  4:05   ` [GSoC][PATCH v3 3/3] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-16  8:20 ` [GSoC][PATCH v4 0/4] [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-16  8:20   ` [GSoC][PATCH v4 1/4] sequencer: add advice for revert Rohit Ashiwal
2019-06-17  5:51     ` Thomas Gummerer
2019-06-16  8:20   ` [GSoC][PATCH v4 2/4] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-16  8:20   ` [GSoC][PATCH v4 3/4] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-17  8:30     ` Thomas Gummerer
2019-06-16  8:20   ` [GSoC][PATCH v4 4/4] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-17  8:39   ` [GSoC][PATCH v4 0/4] [GSoC][PATCH 0/3] Teach cherry-pick/revert to skip commits Thomas Gummerer
2019-06-18 17:06 ` [GSoC][PATCH v5 0/5] " Rohit Ashiwal
2019-06-18 17:06   ` [GSoC][PATCH v5 1/5] sequencer: add advice for revert Rohit Ashiwal
2019-06-18 17:06   ` [GSoC][PATCH v5 2/5] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-18 17:06   ` [GSoC][PATCH v5 3/5] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-06-18 17:06   ` Rohit Ashiwal [this message]
2019-06-20  3:40     ` [GSoC][PATCH v5 4/5] cherry-pick/revert: add --skip option Junio C Hamano
2019-06-20  9:46       ` Rohit Ashiwal
2019-06-20  9:57       ` Phillip Wood
2019-06-20 20:09         ` Junio C Hamano
2019-06-20 10:02     ` Phillip Wood
2019-06-20 10:34       ` Rohit Ashiwal
2019-06-20 11:42         ` Phillip Wood
2019-06-21  7:47           ` Rohit Ashiwal
2019-06-18 17:06   ` [GSoC][PATCH v5 5/5] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-21  9:17 ` [GSoC][PATCH v6 0/5] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-06-21  9:17   ` [GSoC][PATCH v6 1/5] sequencer: add advice for revert Rohit Ashiwal
2019-06-21  9:17   ` [GSoC][PATCH v6 2/5] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-21  9:17   ` [GSoC][PATCH v6 3/5] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-06-21  9:17   ` [GSoC][PATCH v6 4/5] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-21  9:18   ` [GSoC][PATCH v6 5/5] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-06-21 19:09   ` [GSoC][PATCH v6 0/5] Teach cherry-pick/revert to skip commits Junio C Hamano
2019-06-23 20:03 ` [GSoC][PATCH v7 0/6] " Rohit Ashiwal
2019-06-23 20:03   ` [GSoC][PATCH v7 1/6] advice: add sequencerInUse config variable Rohit Ashiwal
2019-06-25  9:18     ` Thomas Gummerer
2019-06-23 20:03   ` [GSoC][PATCH v7 2/6] sequencer: add advice for revert Rohit Ashiwal
2019-06-29 14:05     ` Phillip Wood
2019-06-23 20:03   ` [GSoC][PATCH v7 3/6] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-06-23 20:03   ` [GSoC][PATCH v7 4/6] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-06-23 20:03   ` [GSoC][PATCH v7 5/6] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-06-23 20:03   ` [GSoC][PATCH v7 6/6] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-07-02  9:11 ` [GSoC][PATCH v8 0/5] Teach cherry-pick/revert to skip commits Rohit Ashiwal
2019-07-02  9:11   ` [GSoC][PATCH v8 1/5] sequencer: add advice for revert Rohit Ashiwal
2019-07-02  9:11   ` [GSoC][PATCH v8 2/5] sequencer: rename reset_for_rollback to reset_merge Rohit Ashiwal
2019-07-02  9:11   ` [GSoC][PATCH v8 3/5] sequencer: use argv_array in reset_merge Rohit Ashiwal
2019-07-02  9:11   ` [GSoC][PATCH v8 4/5] cherry-pick/revert: add --skip option Rohit Ashiwal
2019-07-02  9:11   ` [GSoC][PATCH v8 5/5] cherry-pick/revert: advise using --skip Rohit Ashiwal
2019-07-02 15:26   ` [GSoC][PATCH v8 0/5] Teach cherry-pick/revert to skip commits Phillip Wood

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