#include "rebase-interactive.h"
static char const * const builtin_rebase_usage[] = {
- N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
- "[<upstream>] [<branch>]"),
+ N_("git rebase [-i] [options] [--exec <cmd>] "
+ "[--onto <newbase> | --keep-base] [<upstream> [<branch>]]"),
N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
"--root [<branch>]"),
N_("git rebase --continue | --abort | --skip | --edit-todo"),
const char *onto_name;
const char *revisions;
const char *switch_to;
- int root;
+ int root, root_with_onto;
struct object_id *squash_onto;
struct commit *restrict_revision;
int dont_finish_rebase;
flags |= abbreviate_commands ? TODO_LIST_ABBREVIATE_CMDS : 0;
flags |= opts->rebase_merges ? TODO_LIST_REBASE_MERGES : 0;
flags |= opts->rebase_cousins > 0 ? TODO_LIST_REBASE_COUSINS : 0;
+ flags |= opts->root_with_onto ? TODO_LIST_ROOT_WITH_ONTO : 0;
flags |= command == ACTION_SHORTEN_OIDS ? TODO_LIST_SHORTEN_IDS : 0;
switch (command) {
return 1;
}
-static int can_fast_forward(struct commit *onto, struct object_id *head_oid,
- struct object_id *merge_base)
+static int can_fast_forward(struct commit *onto, struct commit *upstream,
+ struct commit *restrict_revision,
+ struct object_id *head_oid, struct object_id *merge_base)
{
struct commit *head = lookup_commit(the_repository, head_oid);
- struct commit_list *merge_bases;
- int res;
+ struct commit_list *merge_bases = NULL;
+ int res = 0;
if (!head)
- return 0;
+ goto done;
merge_bases = get_merge_bases(onto, head);
- if (merge_bases && !merge_bases->next) {
- oidcpy(merge_base, &merge_bases->item->object.oid);
- res = oideq(merge_base, &onto->object.oid);
- } else {
+ if (!merge_bases || merge_bases->next) {
oidcpy(merge_base, &null_oid);
- res = 0;
+ goto done;
}
+
+ oidcpy(merge_base, &merge_bases->item->object.oid);
+ if (!oideq(merge_base, &onto->object.oid))
+ goto done;
+
+ if (restrict_revision && !oideq(&restrict_revision->object.oid, merge_base))
+ goto done;
+
+ if (!upstream)
+ goto done;
+
+ free_commit_list(merge_bases);
+ merge_bases = get_merge_bases(upstream, head);
+ if (!merge_bases || merge_bases->next)
+ goto done;
+
+ if (!oideq(&onto->object.oid, &merge_bases->item->object.oid))
+ goto done;
+
+ res = 1;
+
+done:
free_commit_list(merge_bases);
return res && is_linear_history(onto, head);
}
struct rebase_options options = REBASE_OPTIONS_INIT;
const char *branch_name;
int ret, flags, total_argc, in_progress = 0;
+ int keep_base = 0;
int ok_to_skip_pre_rebase = 0;
struct strbuf msg = STRBUF_INIT;
struct strbuf revisions = STRBUF_INIT;
OPT_STRING(0, "onto", &options.onto_name,
N_("revision"),
N_("rebase onto given branch instead of upstream")),
+ OPT_BOOL(0, "keep-base", &keep_base,
+ N_("use the merge-base of upstream and branch as the current base")),
OPT_BOOL(0, "no-verify", &ok_to_skip_pre_rebase,
N_("allow pre-rebase hook to run")),
OPT_NEGBIT('q', "quiet", &options.flags,
usage_with_options(builtin_rebase_usage,
builtin_rebase_options);
- prefix = setup_git_directory();
- trace_repo_setup(prefix);
- setup_work_tree();
-
options.allow_empty_message = 1;
git_config(rebase_config, &options);
warning(_("git rebase --preserve-merges is deprecated. "
"Use --rebase-merges instead."));
+ if (keep_base) {
+ if (options.onto_name)
+ die(_("cannot combine '--keep-base' with '--onto'"));
+ if (options.root)
+ die(_("cannot combine '--keep-base' with '--root'"));
+ }
+
if (action != ACTION_NONE && !in_progress)
die(_("No rebase in progress?"));
setenv(GIT_REFLOG_ACTION_ENVIRONMENT, "rebase", 0);
"'--reschedule-failed-exec'"));
}
- if (options.rebase_merges) {
- if (strategy_options.nr)
- die(_("cannot combine '--rebase-merges' with "
- "'--strategy-option'"));
- if (options.strategy)
- die(_("cannot combine '--rebase-merges' with "
- "'--strategy'"));
- }
-
if (!options.root) {
if (argc < 1) {
struct branch *branch;
options.squash_onto = &squash_onto;
options.onto_name = squash_onto_name =
xstrdup(oid_to_hex(&squash_onto));
- }
+ } else
+ options.root_with_onto = 1;
+
options.upstream_name = NULL;
options.upstream = NULL;
if (argc > 1)
}
/* Make sure the branch to rebase onto is valid. */
- if (!options.onto_name)
+ if (keep_base) {
+ strbuf_reset(&buf);
+ strbuf_addstr(&buf, options.upstream_name);
+ strbuf_addstr(&buf, "...");
+ options.onto_name = xstrdup(buf.buf);
+ } else if (!options.onto_name)
options.onto_name = options.upstream_name;
if (strstr(options.onto_name, "...")) {
- if (get_oid_mb(options.onto_name, &merge_base) < 0)
- die(_("'%s': need exactly one merge base"),
- options.onto_name);
+ if (get_oid_mb(options.onto_name, &merge_base) < 0) {
+ if (keep_base)
+ die(_("'%s': need exactly one merge base with branch"),
+ options.upstream_name);
+ else
+ die(_("'%s': need exactly one merge base"),
+ options.onto_name);
+ }
options.onto = lookup_commit_or_die(&merge_base,
options.onto_name);
} else {
/*
* Check if we are already based on onto with linear history,
- * but this should be done only when upstream and onto are the same
- * and if this is not an interactive rebase.
+ * in which case we could fast-forward without replacing the commits
+ * with new commits recreated by replaying their changes. This
+ * optimization must not be done if this is an interactive rebase.
*/
- if (can_fast_forward(options.onto, &options.orig_head, &merge_base) &&
- !is_interactive(&options) && !options.restrict_revision &&
- options.upstream &&
- !oidcmp(&options.upstream->object.oid, &options.onto->object.oid)) {
+ if (can_fast_forward(options.onto, options.upstream, options.restrict_revision,
+ &options.orig_head, &merge_base) &&
+ !is_interactive(&options)) {
int flag;
if (!(options.flags & REBASE_FORCE)) {
strbuf_addf(&msg, "%s: checkout %s",
getenv(GIT_REFLOG_ACTION_ENVIRONMENT), options.onto_name);
if (reset_head(&options.onto->object.oid, "checkout", NULL,
- RESET_HEAD_DETACH | RESET_ORIG_HEAD |
+ RESET_HEAD_DETACH | RESET_ORIG_HEAD |
RESET_HEAD_RUN_POST_CHECKOUT_HOOK,
NULL, msg.buf))
die(_("Could not detach HEAD"));