[PATCH v4 14/45] revert/cherry-pick: add --skip option

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Akin to 'am --skip' and 'rebase --skip'.

Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
---
 Documentation/git-cherry-pick.txt |  1 +
 Documentation/git-revert.txt      |  1 +
 Documentation/sequencer.txt       |  3 +++
 builtin/revert.c                  |  6 ++++++
 builtin/sequencer.c               | 24 ++++++++++++++++++++++++
 builtin/sequencer.h               |  3 ++-
 t/t3510-cherry-pick-sequence.sh   | 12 ++++++++++++
 7 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt
index da0bd81..d95c63c 100644
--- a/Documentation/git-cherry-pick.txt
+++ b/Documentation/git-cherry-pick.txt
@@ -10,6 +10,7 @@ SYNOPSIS
 [verse]
 'git cherry-pick' [-q] [--edit] [-n] [-m parent-number] [-s] [-x] [--ff] <commit>...
 'git cherry-pick' --continue
+'git cherry-pick' --skip
 'git cherry-pick' --quit
 'git cherry-pick' --abort
 
diff --git a/Documentation/git-revert.txt b/Documentation/git-revert.txt
index 98a8e7a..52e146e 100644
--- a/Documentation/git-revert.txt
+++ b/Documentation/git-revert.txt
@@ -10,6 +10,7 @@ SYNOPSIS
 [verse]
 'git revert' [-q] [--[no-]edit] [-n] [-m parent-number] [-s] <commit>...
 'git revert' --continue
+'git revert' --skip
 'git revert' --quit
 'git revert' --abort
 
diff --git a/Documentation/sequencer.txt b/Documentation/sequencer.txt
index 5747f44..df2d355 100644
--- a/Documentation/sequencer.txt
+++ b/Documentation/sequencer.txt
@@ -3,6 +3,9 @@
 	'.git/sequencer'.  Can be used to continue after resolving
 	conflicts in a failed cherry-pick or revert.
 
+--skip::
+	Skip the current commit, and then continue.
+
 --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 ec83748..d3d5600 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -99,11 +99,13 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
 	int remove_state = 0;
 	int contin = 0;
 	int rollback = 0;
+	int skip = 0;
 	struct option options[] = {
 		OPT__QUIET(&opts->quiet, N_("suppress progress reporting")),
 		OPT_BOOLEAN(0, "quit", &remove_state, N_("end revert or cherry-pick sequence")),
 		OPT_BOOLEAN(0, "continue", &contin, N_("resume revert or cherry-pick sequence")),
 		OPT_BOOLEAN(0, "abort", &rollback, N_("cancel revert or cherry-pick sequence")),
+		OPT_BOOLEAN(0, "skip", &skip, N_("skip current commit in the sequence")),
 		OPT_BOOLEAN('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
 		OPT_BOOLEAN('e', "edit", &opts->edit, N_("edit the commit message")),
 		OPT_NOOP_NOARG('r', NULL),
@@ -164,6 +166,8 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
 		opts->subcommand = REPLAY_CONTINUE;
 	else if (rollback)
 		opts->subcommand = REPLAY_ROLLBACK;
+	else if (skip)
+		opts->subcommand = REPLAY_SKIP;
 	else
 		opts->subcommand = REPLAY_NONE;
 
@@ -174,6 +178,8 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
 			this_operation = "--quit";
 		else if (opts->subcommand == REPLAY_CONTINUE)
 			this_operation = "--continue";
+		else if (opts->subcommand == REPLAY_SKIP)
+			this_operation = "--skip";
 		else {
 			assert(opts->subcommand == REPLAY_ROLLBACK);
 			this_operation = "--abort";
diff --git a/builtin/sequencer.c b/builtin/sequencer.c
index 0f50942..2b1b30a 100644
--- a/builtin/sequencer.c
+++ b/builtin/sequencer.c
@@ -961,6 +961,28 @@ static int sequencer_continue(struct replay_opts *opts)
 	return pick_commits(todo_list, opts);
 }
 
+static int sequencer_skip(struct replay_opts *opts)
+{
+	const char *argv[4]; /* reset --hard HEAD + NULL */
+	struct string_list merge_rr = STRING_LIST_INIT_DUP;
+	int ret;
+
+	if (setup_rerere(&merge_rr, 0) >= 0) {
+		rerere_clear(&merge_rr);
+		string_list_clear(&merge_rr, 1);
+	}
+
+	argv[0] = "reset";
+	argv[1] = "--hard";
+	argv[2] = "HEAD";
+	argv[3] = NULL;
+	ret = run_command_v_opt(argv, RUN_GIT_CMD);
+	if (ret)
+		return ret;
+
+	return sequencer_continue(opts);
+}
+
 static int single_pick(struct commit *cmit, struct replay_opts *opts)
 {
 	setenv(GIT_REFLOG_ACTION, action_name(opts), 0);
@@ -991,6 +1013,8 @@ int sequencer_pick_revisions(struct replay_opts *opts)
 		return sequencer_rollback(opts);
 	if (opts->subcommand == REPLAY_CONTINUE)
 		return sequencer_continue(opts);
+	if (opts->subcommand == REPLAY_SKIP)
+		return sequencer_skip(opts);
 
 	for (i = 0; i < opts->revs->pending.nr; i++) {
 		unsigned char sha1[20];
diff --git a/builtin/sequencer.h b/builtin/sequencer.h
index e45411c..e69495a 100644
--- a/builtin/sequencer.h
+++ b/builtin/sequencer.h
@@ -15,7 +15,8 @@ enum replay_subcommand {
 	REPLAY_NONE,
 	REPLAY_REMOVE_STATE,
 	REPLAY_CONTINUE,
-	REPLAY_ROLLBACK
+	REPLAY_ROLLBACK,
+	REPLAY_SKIP
 };
 
 struct replay_opts {
diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh
index 33c5512..c43c327 100755
--- a/t/t3510-cherry-pick-sequence.sh
+++ b/t/t3510-cherry-pick-sequence.sh
@@ -511,4 +511,16 @@ test_expect_success 'commit descriptions in insn sheet are optional' '
 	test_line_count = 4 commits
 '
 
+test_expect_success 'skip' '
+	pristine_detach conflicting &&
+	test_must_fail git cherry-pick initial..picked &&
+
+	git checkout HEAD -- unrelated &&
+	test_must_fail git cherry-pick --continue &&
+	git cherry-pick --skip &&
+
+	git rev-list initial..HEAD >commits &&
+	test_line_count = 3 commits
+'
+
 test_done
-- 
1.8.3.698.g079b096

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