git cherry-pick fails when picking a non-ff commit that is empty. The advice
given with the failure is that a git-commit --allow-empty should be issued to
explicitly add the empty commit during the cherry pick. This option allows a
user to specify before hand that they want to keep the empty commit. This
eliminates the need to issue both a cherry pick and a commit operaion.
Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
CC: Jeff King <peff@xxxxxxxx>
CC: Phil Hord <phil.hord@xxxxxxxxx>
CC: Junio C Hamano <gitster@xxxxxxxxx>
---
Documentation/git-cherry-pick.txt | 7 +++++++
builtin/revert.c | 2 ++
sequencer.c | 7 +++++--
sequencer.h | 1 +
4 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt
index fed5097..3e975dc 100644
--- a/Documentation/git-cherry-pick.txt
+++ b/Documentation/git-cherry-pick.txt
@@ -103,6 +103,13 @@ effect to your index in a row.
cherry-pick'ed commit, then a fast forward to this commit will
be performed.
+--keep-empty:
+ If a commit is not a fast forward, or if fast forwarding is not allowed,
+ cherry-picking an empty commit will fail, indicating that an explicit
+ invokation of git commit --allow-empty is required. This option
+ overrides that behavior, allowing empty commits to be preserved
+ automatically in a cherry-pick
+
--strategy=<strategy>::
Use the given merge strategy. Should only be used once.
See the MERGE STRATEGIES section in linkgit:git-merge[1]
diff --git a/builtin/revert.c b/builtin/revert.c
index e6840f2..47d5522 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -114,12 +114,14 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
OPT_END(),
OPT_END(),
OPT_END(),
+ OPT_END(),
};
if (opts->action == REPLAY_PICK) {
struct option cp_extra[] = {
OPT_BOOLEAN('x', NULL, &opts->record_origin, "append commit name"),
OPT_BOOLEAN(0, "ff", &opts->allow_ff, "allow fast-forward"),
+ OPT_BOOLEAN(0, "keep-empty", &opts->allow_empty, "preserve empty commits"),
OPT_END(),
};
if (parse_options_concat(options, ARRAY_SIZE(options), cp_extra))
diff --git a/sequencer.c b/sequencer.c
index a37846a..71929ba 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -260,8 +260,8 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
*/
static int run_git_commit(const char *defmsg, struct replay_opts *opts)
{
- /* 6 is max possible length of our args array including NULL */
- const char *args[6];
+ /* 7 is max possible length of our args array including NULL */
+ const char *args[7];
int i = 0;
args[i++] = "commit";
@@ -272,6 +272,9 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts)
args[i++] = "-F";
args[i++] = defmsg;
}
+ if (opts->allow_empty)
+ args[i++] = "--allow-empty";
+
args[i] = NULL;
return run_command_v_opt(args, RUN_GIT_CMD);
diff --git a/sequencer.h b/sequencer.h
index bb4b138..e2cd725 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -29,6 +29,7 @@ struct replay_opts {
int signoff;
int allow_ff;
int allow_rerere_auto;
+ int allow_empty;
int mainline;
--
1.7.7.6
--
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