This allows the preservation of originally empty commits with the
combination of flags --allow-empty --skip-redundant-commits.
Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@xxxxxxxxx>
---
Documentation/git-cherry-pick.txt | 8 ++++-
builtin/revert.c | 18 +++++++++++-
sequencer.c | 62 ++++++++++++++++++++++++++++++---------
sequencer.h | 1 +
4 files changed, 73 insertions(+), 16 deletions(-)
diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt
index ffced816d6..147e0cde0c 100644
--- a/Documentation/git-cherry-pick.txt
+++ b/Documentation/git-cherry-pick.txt
@@ -138,9 +138,15 @@ effect to your index in a row.
examine the commit. This option overrides that behavior and
creates an empty commit object. Implies `--allow-empty`.
+--skip-redundant-commits::
+ Redundant commits will be skipped altogether. This does not
+ influence commits that were originally empty (see
+ `--allow-empty` and `--skip-empty`).
+
--skip-empty::
This option causes empty and redundant cherry-picked commits to
- be skipped without requesting the user intervention.
+ be skipped without requesting the user intervention. Implies
+ `--skip-redundant-commits`.
--strategy=<strategy>::
Use the given merge strategy. Should only be used once.
diff --git a/builtin/revert.c b/builtin/revert.c
index ffdd367f99..aca8a1d9d0 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -102,7 +102,8 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
OPT_BOOL(0, "allow-empty", &opts->allow_empty, N_("preserve initially empty commits")),
OPT_BOOL(0, "allow-empty-message", &opts->allow_empty_message, N_("allow commits with empty messages")),
OPT_BOOL(0, "keep-redundant-commits", &opts->keep_redundant_commits, N_("keep redundant, empty commits")),
- OPT_BOOL(0, "skip-empty", &opts->skip_empty, N_("skip redundant, empty commits")),
+ OPT_BOOL(0, "skip-empty", &opts->skip_empty, N_("skip both redundant and initially empty commits")),
+ OPT_BOOL(0, "skip-redundant-commits", &opts->skip_redundant_commits, N_("skip redundant commits")),
OPT_END(),
};
options = parse_options_concat(options, cp_extra);
@@ -115,6 +116,9 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
/* implies allow_empty */
if (opts->keep_redundant_commits)
opts->allow_empty = 1;
+ /* implies skip_redundant_commits */
+ if (opts->skip_empty)
+ opts->skip_redundant_commits = 1;
/* Check for incompatible command line arguments */
if (cmd) {
@@ -147,6 +151,18 @@ static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
"--edit", opts->edit,
NULL);
+ if (opts->keep_redundant_commits)
+ verify_opt_compatible(me, "--keep-redundant-commits",
+ "--skip-empty", opts->skip_empty,
+ "--skip-redundant-commits", opts->skip_redundant_commits,
+ NULL);
+
+ if (opts->keep_redundant_commits)
+ verify_opt_compatible(me, "--skip-empty",
+ "--allow-empty", opts->allow_empty,
+ "--keep-redundant-commits", opts->keep_redundant_commits,
+ NULL);
+
if (cmd) {
opts->revs = NULL;
} else {
diff --git a/sequencer.c b/sequencer.c
index 9c01310162..333d9112de 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -563,40 +563,70 @@ static int allow_or_skip_empty(struct replay_opts *opts, struct commit *commit)
{
int index_unchanged, empty_commit;
- /*
- * Four cases:
+ /* We have four options:
*
- * (1) we do not allow empty at all and error out;
+ * --allow-empty (AE)
+ * --keep-redundant-commits (KR)
+ * --skip-empty (SE)
+ * --skip-redundant-commits (SR)
*
- * (2) we skip empty commits altogether;
+ * Additionally, if KR, then AE. And if SE, then SR.
+ *
+ * We have three possible states:
+ * Not Empty (NE)
+ * Originally Empty (OE)
+ * made REdundant (RE) (originally not empty)
*
- * (3) we allow ones that were initially empty, but
- * forbid the ones that become empty;
+ * NE always gets committed. The other two depend on the combination
+ * of flags.
*
- * (4) we allow both.
+ * OE outcome | RE outcome | AE KR SE SR
+ * Case 0: 0 (error) 0 (error) 0 0 0 0
+ * Case 1: 1 (allow) 0 (error) 1 0 0 0
+ * N/A Case 2: 2 (skip) 0 (error) 0 0 1 0
+ * N/A Case 3: 0 (error) 1 (keep) 0 1 0 0
+ * Case 4: 1 (allow) 1 (keep) 1 1 0 0
+ * N/A Case 5: 2 (skip) 1 (keep) 0 1 1 0
+ * Case 6: 0 (error) 2 (skip) 0 0 0 1
+ * Case 7: 1 (allow) 2 (skip) 1 0 0 1
+ * Case 8: 2 (skip ) 2 (skip) 0 0 1 1
+ *
+ * TODO should we allow Case 2? If so, how?
*/
- if (!opts->allow_empty && !opts->skip_empty)
+
+ /* Case 0 */
+ if (!opts->allow_empty && !opts->skip_redundant_commits)
return 0; /* let "git commit" barf as necessary */
index_unchanged = is_index_unchanged();
if (index_unchanged < 0)
return index_unchanged;
+
if (!index_unchanged)
return 0; /* we do not have to say --allow-empty */
- if (opts->skip_empty)
- return 2;
+ /* Here we know that the commit is either OE or RE */
+ /* Case 4, we don't care, result is 'allow' for both cases */
if (opts->keep_redundant_commits)
return 1;
+ /* Case 8, we don't care, result is 'skip' for both cases */
+ if (opts->skip_empty)
+ return 2;
+
+ /* Now we must differentiate between OE and RE,
+ * for Case 1, 6, 7 */
empty_commit = is_original_commit_empty(commit);
if (empty_commit < 0)
return empty_commit;
- if (!empty_commit)
- return 0;
- else
- return 1;
+
+ /* An OE will return 1 if AE, 0 otherwise */
+ if (empty_commit)
+ return opts->allow_empty;
+
+ /* An RE will return 2 if SR, 0 otherwise */
+ return 2*opts->skip_redundant_commits;
}
enum todo_command {
@@ -1009,6 +1039,8 @@ static int populate_opts_cb(const char *key, const char *value, void *data)
opts->keep_redundant_commits = git_config_bool_or_int(key, value, &error_flag);
else if (!strcmp(key, "options.skip-empty"))
opts->skip_empty = git_config_bool_or_int(key, value, &error_flag);
+ else if (!strcmp(key, "options.skip-redundant-commits"))
+ opts->skip_redundant_commits = git_config_bool_or_int(key, value, &error_flag);
else if (!strcmp(key, "options.mainline"))
opts->mainline = git_config_int(key, value);
else if (!strcmp(key, "options.gpg-sign"))
@@ -1267,6 +1299,8 @@ static int save_opts(struct replay_opts *opts)
res |= git_config_set_in_file_gently(opts_file, "options.keep-redundant-commits", "true");
if (opts->skip_empty)
res |= git_config_set_in_file_gently(opts_file, "options.skip-empty", "true");
+ if (opts->skip_redundant_commits)
+ res |= git_config_set_in_file_gently(opts_file, "options.skip-redundant-commits", "true");
if (opts->mainline) {
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "%d", opts->mainline);
diff --git a/sequencer.h b/sequencer.h
index c747cfcfc7..f8b8bd0063 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -24,6 +24,7 @@ struct replay_opts {
int allow_empty_message;
int keep_redundant_commits;
int skip_empty;
+ int skip_redundant_commits;;
int mainline;
--
2.11.0.616.gd72966cf44.dirty