This commit adds support for `switch-to` which is used to switch to the
target branch if needed. The equivalent codes found in shell script
`git-legacy-rebase.sh` is converted to builtin `rebase.c`.
Signed-off-by: Pratik Karki <predatoramigo@xxxxxxxxx>
---
builtin/rebase.c | 48 ++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 44 insertions(+), 4 deletions(-)
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 63634210c0..b2ddfa8dbf 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -79,6 +79,7 @@ struct rebase_options {
struct commit *onto;
const char *onto_name;
const char *revisions;
+ const char *switch_to;
int root;
struct commit *restrict_revision;
int dont_finish_rebase;
@@ -186,6 +187,8 @@ static int run_specific_rebase(struct rebase_options *opts)
opts->flags & REBASE_DIFFSTAT ? "t" : "");
add_var(&script_snippet, "force_rebase",
opts->flags & REBASE_FORCE ? "t" : "");
+ if (opts->switch_to)
+ add_var(&script_snippet, "switch_to", opts->switch_to);
switch (opts->type) {
case REBASE_AM:
@@ -564,9 +567,23 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
* orig_head -- commit object name of tip of the branch before rebasing
* head_name -- refs/heads/<that-branch> or NULL (detached HEAD)
*/
- if (argc > 0)
- die("TODO: handle switch_to");
- else {
+ if (argc == 1) {
+ /* Is it "rebase other branchname" or "rebase other commit"? */
+ branch_name = argv[0];
+ options.switch_to = argv[0];
+
+ /* Is it a local branch? */
+ strbuf_reset(&buf);
+ strbuf_addf(&buf, "refs/heads/%s", branch_name);
+ if (!read_ref(buf.buf, &options.orig_head))
+ options.head_name = xstrdup(buf.buf);
+ /* If not is it a valid ref (branch or commit)? */
+ else if (!get_oid(branch_name, &options.orig_head))
+ options.head_name = NULL;
+ else
+ die(_("fatal: no such branch/commit '%s'"),
+ branch_name);
+ } else if (argc == 0) {
/* Do not need to switch branches, we are already on it. */
options.head_name =
xstrdup_or_null(resolve_ref_unsafe("HEAD", 0, NULL,
@@ -585,7 +602,8 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
}
if (get_oid("HEAD", &options.orig_head))
die(_("Could not resolve HEAD to a revision"));
- }
+ } else
+ BUG("unexpected number of arguments left to parse");
if (read_index(the_repository->index) < 0)
die(_("could not read index"));
@@ -612,6 +630,28 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
int flag;
if (!(options.flags & REBASE_FORCE)) {
+ /* Lazily switch to the target branch if needed... */
+ if (options.switch_to) {
+ struct object_id oid;
+
+ if (get_oid(options.switch_to, &oid) < 0) {
+ ret = !!error(_("could not parse '%s'"),
+ options.switch_to);
+ goto cleanup;
+ }
+
+ strbuf_reset(&buf);
+ strbuf_addf(&buf, "rebase: checkout %s",
+ options.switch_to);
+ if (reset_head(&oid, "checkout",
+ options.head_name, 0) < 0) {
+ ret = !!error(_("could not switch to "
+ "%s"),
+ options.switch_to);
+ goto cleanup;
+ }
+ }
+
if (!(options.flags & REBASE_NO_QUIET))
; /* be quiet */
else if (!strcmp(branch_name, "HEAD") &&
--
2.18.0
