This has multiple benefits: with more than one of {"--ff", "--no-ff",
"--ff-only"} respects the last option; also the command-line option to
always take precedence over the config file option.
Signed-off-by: Miklos Vajna <vmiklos@xxxxxxx>
---
On Mon, Jul 01, 2013 at 04:52:29PM +0200, Michael Haggerty <mhagger@xxxxxxxxxxxx> wrote:
> If I find the time (unlikely) I might submit a patch to implement these
> expectations.
Seeing that the --no-ff / --ff-only combo wasn't denied just sort of
accidently, I agree that it makes more sense to merge allow_fast_forward
and fast_forward_only to a single enum, that automatically gives you
both benefits.
builtin/merge.c | 65 +++++++++++++++++++++++++++++++++++++-------------------
t/t7600-merge.sh | 12 ++++++++---
2 files changed, 52 insertions(+), 25 deletions(-)
diff --git a/builtin/merge.c b/builtin/merge.c
index 2ebe732..561edf4 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -47,8 +47,8 @@ static const char * const builtin_merge_usage[] = {
};
static int show_diffstat = 1, shortlog_len = -1, squash;
-static int option_commit = 1, allow_fast_forward = 1;
-static int fast_forward_only, option_edit = -1;
+static int option_commit = 1;
+static int option_edit = -1;
static int allow_trivial = 1, have_message, verify_signatures;
static int overwrite_ignore = 1;
static struct strbuf merge_msg = STRBUF_INIT;
@@ -76,6 +76,14 @@ static struct strategy all_strategy[] = {
static const char *pull_twohead, *pull_octopus;
+enum ff_type {
+ FF_ALLOW,
+ FF_NO,
+ FF_ONLY
+};
+
+static enum ff_type fast_forward = FF_ALLOW;
+
static int option_parse_message(const struct option *opt,
const char *arg, int unset)
{
@@ -178,6 +186,21 @@ static int option_parse_n(const struct option *opt,
return 0;
}
+static int option_parse_ff(const struct option *opt,
+ const char *arg, int unset)
+{
+ fast_forward = unset ? FF_NO : FF_ALLOW;
+ return 0;
+}
+
+static int option_parse_ff_only(const struct option *opt,
+ const char *arg, int unset)
+{
+ if (!unset)
+ fast_forward = FF_ONLY;
+ return 0;
+}
+
static struct option builtin_merge_options[] = {
{ OPTION_CALLBACK, 'n', NULL, NULL, NULL,
N_("do not show a diffstat at the end of the merge"),
@@ -194,10 +217,12 @@ static struct option builtin_merge_options[] = {
N_("perform a commit if the merge succeeds (default)")),
OPT_BOOL('e', "edit", &option_edit,
N_("edit message before committing")),
- OPT_BOOLEAN(0, "ff", &allow_fast_forward,
- N_("allow fast-forward (default)")),
- OPT_BOOLEAN(0, "ff-only", &fast_forward_only,
- N_("abort if fast-forward is not possible")),
+ { OPTION_CALLBACK, 0, "ff", NULL, NULL,
+ N_("allow fast-forward (default)"),
+ PARSE_OPT_NOARG, option_parse_ff },
+ { OPTION_CALLBACK, 0, "ff-only", NULL, NULL,
+ N_("abort if fast-forward is not possible"),
+ PARSE_OPT_NOARG, option_parse_ff_only },
OPT_RERERE_AUTOUPDATE(&allow_rerere_auto),
OPT_BOOL(0, "verify-signatures", &verify_signatures,
N_("Verify that the named commit has a valid GPG signature")),
@@ -581,10 +606,9 @@ static int git_merge_config(const char *k, const char *v, void *cb)
else if (!strcmp(k, "merge.ff")) {
int boolval = git_config_maybe_bool(k, v);
if (0 <= boolval) {
- allow_fast_forward = boolval;
+ fast_forward = boolval ? FF_ALLOW : FF_NO;
} else if (v && !strcmp(v, "only")) {
- allow_fast_forward = 1;
- fast_forward_only = 1;
+ fast_forward = FF_ONLY;
} /* do not barf on values from future versions of git */
return 0;
} else if (!strcmp(k, "merge.defaulttoupstream")) {
@@ -863,7 +887,7 @@ static int finish_automerge(struct commit *head,
free_commit_list(common);
parents = remoteheads;
- if (!head_subsumed || !allow_fast_forward)
+ if (!head_subsumed || fast_forward == FF_NO)
commit_list_insert(head, &parents);
strbuf_addch(&merge_msg, '\n');
prepare_to_commit(remoteheads);
@@ -1008,7 +1032,7 @@ static void write_merge_state(struct commit_list *remoteheads)
if (fd < 0)
die_errno(_("Could not open '%s' for writing"), filename);
strbuf_reset(&buf);
- if (!allow_fast_forward)
+ if (fast_forward == FF_NO)
strbuf_addf(&buf, "no-ff");
if (write_in_full(fd, buf.buf, buf.len) != buf.len)
die_errno(_("Could not write to '%s'"), filename);
@@ -1157,14 +1181,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
show_diffstat = 0;
if (squash) {
- if (!allow_fast_forward)
+ if (fast_forward == FF_NO)
die(_("You cannot combine --squash with --no-ff."));
option_commit = 0;
}
- if (!allow_fast_forward && fast_forward_only)
- die(_("You cannot combine --no-ff with --ff-only."));
-
if (!abort_current_merge) {
if (!argc) {
if (default_to_upstream)
@@ -1206,7 +1227,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
"empty head"));
if (squash)
die(_("Squash commit into empty head not supported yet"));
- if (!allow_fast_forward)
+ if (fast_forward == FF_NO)
die(_("Non-fast-forward commit does not make sense into "
"an empty head"));
remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv);
@@ -1294,11 +1315,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
sha1_to_hex(commit->object.sha1));
setenv(buf.buf, merge_remote_util(commit)->name, 1);
strbuf_reset(&buf);
- if (!fast_forward_only &&
+ if (fast_forward != FF_ONLY &&
merge_remote_util(commit) &&
merge_remote_util(commit)->obj &&
merge_remote_util(commit)->obj->type == OBJ_TAG)
- allow_fast_forward = 0;
+ fast_forward = FF_NO;
}
if (option_edit < 0)
@@ -1315,7 +1336,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
for (i = 0; i < use_strategies_nr; i++) {
if (use_strategies[i]->attr & NO_FAST_FORWARD)
- allow_fast_forward = 0;
+ fast_forward = FF_NO;
if (use_strategies[i]->attr & NO_TRIVIAL)
allow_trivial = 0;
}
@@ -1345,7 +1366,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
*/
finish_up_to_date("Already up-to-date.");
goto done;
- } else if (allow_fast_forward && !remoteheads->next &&
+ } else if (fast_forward != FF_NO && !remoteheads->next &&
!common->next &&
!hashcmp(common->item->object.sha1, head_commit->object.sha1)) {
/* Again the most common case of merging one remote. */
@@ -1392,7 +1413,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* only one common.
*/
refresh_cache(REFRESH_QUIET);
- if (allow_trivial && !fast_forward_only) {
+ if (allow_trivial && fast_forward != FF_ONLY) {
/* See if it is really trivial. */
git_committer_info(IDENT_STRICT);
printf(_("Trying really trivial in-index merge...\n"));
@@ -1433,7 +1454,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
}
}
- if (fast_forward_only)
+ if (fast_forward == FF_ONLY)
die(_("Not possible to fast-forward, aborting."));
/* We are going to make a new commit. */
diff --git a/t/t7600-merge.sh b/t/t7600-merge.sh
index 460d8eb..3ff5fb8 100755
--- a/t/t7600-merge.sh
+++ b/t/t7600-merge.sh
@@ -497,9 +497,15 @@ test_expect_success 'combining --squash and --no-ff is refused' '
test_must_fail git merge --no-ff --squash c1
'
-test_expect_success 'combining --ff-only and --no-ff is refused' '
- test_must_fail git merge --ff-only --no-ff c1 &&
- test_must_fail git merge --no-ff --ff-only c1
+test_expect_success 'option --ff-only overwrites --no-ff' '
+ git merge --no-ff --ff-only c1 &&
+ test_must_fail git merge --no-ff --ff-only c2
+'
+
+test_expect_success 'option --ff-only overwrites merge.ff=only config' '
+ git reset --hard c0 &&
+ test_config merge.ff only &&
+ git merge --no-ff c1
'
test_expect_success 'merge c0 with c1 (ff overrides no-ff)' '
--
1.8.1.4
--
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