The purpose of the new option is to accommodate users who would like
--rebase-merges to be on by default and to facilitate possibly turning
on --rebase-merges by default without configuration in a future version
of Git.
Signed-off-by: Alex Henrie <alexhenrie24@xxxxxxxxx>
---
Documentation/config/rebase.txt | 10 ++++
Documentation/git-rebase.txt | 3 +-
builtin/rebase.c | 47 ++++++++++++----
t/t3430-rebase-merges.sh | 96 +++++++++++++++++++++++++++++++++
4 files changed, 144 insertions(+), 12 deletions(-)
diff --git a/Documentation/config/rebase.txt b/Documentation/config/rebase.txt
index f19bd0e040..308baa9dbb 100644
--- a/Documentation/config/rebase.txt
+++ b/Documentation/config/rebase.txt
@@ -67,3 +67,13 @@ rebase.rescheduleFailedExec::
rebase.forkPoint::
If set to false set `--no-fork-point` option by default.
+
+rebase.merges::
+ Whether and how to set the `--rebase-merges` option by default. Can
+ be `rebase-cousins`, `no-rebase-cousins`, or a boolean. Setting to
+ true is equivalent to `--rebase-merges` without an argument, setting to
+ `rebase-cousins` or `no-rebase-cousins` is equivalent to
+ `--rebase-merges` with that value as its argument, and setting to false
+ is equivalent to `--no-rebase-merges`. Passing `--rebase-merges` on the
+ command line without an argument overrides a `rebase.merges=false`
+ configuration but does not override other values of `rebase.merge`.
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index c98784a0d2..b02f9cbb8c 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -537,7 +537,8 @@ See also INCOMPATIBLE OPTIONS below.
by recreating the merge commits. Any resolved merge conflicts or
manual amendments in these merge commits will have to be
resolved/re-applied manually. `--no-rebase-merges` can be used to
- countermand a previous `--rebase-merges`.
+ countermand both the `rebase.merges` config option and a previous
+ `--rebase-merges`.
+
By default, or when `no-rebase-cousins` was specified, commits which do not
have `<upstream>` as direct ancestor will keep their original branch point,
diff --git a/builtin/rebase.c b/builtin/rebase.c
index b68fc2fbb7..45cf445d42 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -771,6 +771,20 @@ static int run_specific_rebase(struct rebase_options *opts)
return status ? -1 : 0;
}
+static void parse_merges_value(struct rebase_options *options, const char *value)
+{
+ if (value) {
+ if (!strcmp("no-rebase-cousins", value))
+ options->rebase_cousins = 0;
+ else if (!strcmp("rebase-cousins", value))
+ options->rebase_cousins = 1;
+ else
+ die(_("Unknown mode: %s"), value);
+ }
+
+ options->rebase_merges = 1;
+}
+
static int rebase_config(const char *var, const char *value, void *data)
{
struct rebase_options *opts = data;
@@ -815,6 +829,13 @@ static int rebase_config(const char *var, const char *value, void *data)
return 0;
}
+ if (!strcmp(var, "rebase.merges") && value && *value) {
+ opts->rebase_merges = git_parse_maybe_bool(value);
+ if (opts->rebase_merges < 0)
+ parse_merges_value(opts, value);
+ return 0;
+ }
+
if (!strcmp(var, "rebase.backend")) {
return git_config_string(&opts->default_backend, var, value);
}
@@ -980,6 +1001,18 @@ static int parse_opt_empty(const struct option *opt, const char *arg, int unset)
return 0;
}
+static int parse_opt_merges(const struct option *opt, const char *arg, int unset)
+{
+ struct rebase_options *options = opt->value;
+
+ if (unset)
+ options->rebase_merges = 0;
+ else
+ parse_merges_value(options, arg);
+
+ return 0;
+}
+
static void NORETURN error_on_missing_default_upstream(void)
{
struct branch *current_branch = branch_get(NULL);
@@ -1035,7 +1068,6 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
struct object_id branch_base;
int ignore_whitespace = 0;
const char *gpg_sign = NULL;
- const char *rebase_merges = NULL;
struct string_list strategy_options = STRING_LIST_INIT_NODUP;
struct object_id squash_onto;
char *squash_onto_name = NULL;
@@ -1137,10 +1169,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
&options.allow_empty_message,
N_("allow rebasing commits with empty messages"),
PARSE_OPT_HIDDEN),
- {OPTION_STRING, 'r', "rebase-merges", &rebase_merges,
- N_("mode"),
+ OPT_CALLBACK_F('r', "rebase-merges", &options, N_("mode"),
N_("try to rebase merges instead of skipping them"),
- PARSE_OPT_OPTARG, NULL, (intptr_t)"no-rebase-cousins"},
+ PARSE_OPT_OPTARG, parse_opt_merges),
OPT_BOOL(0, "fork-point", &options.fork_point,
N_("use 'merge-base --fork-point' to refine upstream")),
OPT_STRING('s', "strategy", &options.strategy,
@@ -1436,14 +1467,8 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
if (options.exec.nr)
imply_merge(&options, "--exec");
- if (rebase_merges) {
- if (!strcmp("rebase-cousins", rebase_merges))
- options.rebase_cousins = 1;
- else if (strcmp("no-rebase-cousins", rebase_merges))
- die(_("Unknown mode: %s"), rebase_merges);
- options.rebase_merges = 1;
+ if (options.rebase_merges)
imply_merge(&options, "--rebase-merges");
- }
if (options.type == REBASE_APPLY) {
if (ignore_whitespace)
diff --git a/t/t3430-rebase-merges.sh b/t/t3430-rebase-merges.sh
index b8ba323dbc..88d347cea5 100755
--- a/t/t3430-rebase-merges.sh
+++ b/t/t3430-rebase-merges.sh
@@ -299,6 +299,102 @@ test_expect_success '--rebase-merges="" is invalid syntax' '
test_cmp expect actual
'
+test_expect_success 'rebase.merges="" is equivalent to not passing --rebase-merges' '
+ test_config rebase.merges "" &&
+ git checkout -b config-merges-blank E &&
+ git rebase C &&
+ test_cmp_graph C.. <<-\EOF
+ * B
+ * D
+ o C
+ EOF
+'
+
+test_expect_success 'rebase.merges=rebase-cousins is equivalent to --rebase-merges=rebase-cousins' '
+ test_config rebase.merges rebase-cousins &&
+ git checkout -b config-rebase-cousins main &&
+ git rebase HEAD^ &&
+ test_cmp_graph HEAD^.. <<-\EOF
+ * Merge the topic branch '\''onebranch'\''
+ |\
+ | * D
+ | * G
+ |/
+ o H
+ EOF
+'
+
+test_expect_success '--no-rebase-merges overrides rebase.merges=no-rebase-cousins' '
+ test_config rebase.merges no-rebase-cousins &&
+ git checkout -b override-config-no-rebase-cousins E &&
+ git rebase --no-rebase-merges C &&
+ test_cmp_graph C.. <<-\EOF
+ * B
+ * D
+ o C
+ EOF
+'
+
+test_expect_success '--rebase-merges=no-rebase-cousins overrides rebase.merges=rebase-cousins' '
+ test_config rebase.merges rebase-cousins &&
+ git checkout -b override-config-rebase-cousins main &&
+ git rebase --rebase-merges=no-rebase-cousins HEAD^ &&
+ test_cmp_graph HEAD^.. <<-\EOF
+ * Merge the topic branch '\''onebranch'\''
+ |\
+ | * D
+ | * G
+ o | H
+ |/
+ o A
+ EOF
+'
+
+test_expect_success '--rebase-merges overrides rebase.merges=false' '
+ test_config rebase.merges false &&
+ git checkout -b override-config-merges-false E &&
+ before="$(git rev-parse --verify HEAD)" &&
+ test_tick &&
+ git rebase --rebase-merges C &&
+ test_cmp_rev HEAD $before
+'
+
+test_expect_success '--rebase-merges does not override rebase.merges=rebase-cousins' '
+ test_config rebase.merges rebase-cousins &&
+ git checkout -b no-override-config-rebase-cousins main &&
+ git rebase --rebase-merges HEAD^ &&
+ test_cmp_graph HEAD^.. <<-\EOF
+ * Merge the topic branch '\''onebranch'\''
+ |\
+ | * D
+ | * G
+ |/
+ o H
+ EOF
+'
+
+test_expect_success 'local rebase.merges=false overrides global rebase.merges=true' '
+ test_config_global rebase.merges true &&
+ test_config rebase.merges false &&
+ git checkout -b override-global-config E &&
+ git rebase C &&
+ test_cmp_graph C.. <<-\EOF
+ * B
+ * D
+ o C
+ EOF
+'
+
+test_expect_success 'local rebase.merges="" does not override global rebase.merges=true' '
+ test_config_global rebase.merges no-rebase-cousins &&
+ test_config rebase.merges "" &&
+ git checkout -b no-override-global-config E &&
+ before="$(git rev-parse --verify HEAD)" &&
+ test_tick &&
+ git rebase C &&
+ test_cmp_rev HEAD $before
+'
+
test_expect_success 'refs/rewritten/* is worktree-local' '
git worktree add wt &&
cat >wt/script-from-scratch <<-\EOF &&
--
2.39.2
