2011-10-07 06:12:09 +00:00
|
|
|
#ifndef FMT_MERGE_MSG_H
|
|
|
|
|
#define FMT_MERGE_MSG_H
|
|
|
|
|
|
2020-03-24 01:07:51 +00:00
|
|
|
#include "strbuf.h"
|
|
|
|
|
|
|
|
|
|
#define DEFAULT_MERGE_LOG_LEN 20
|
|
|
|
|
|
|
|
|
|
struct fmt_merge_msg_opts {
|
|
|
|
|
unsigned add_title:1,
|
|
|
|
|
credit_people:1;
|
|
|
|
|
int shortlog_len;
|
merge: allow to pretend a merge is made into a different branch
When a series of patches for a topic-B depends on having topic-A,
the workflow to prepare the topic-B branch would look like this:
$ git checkout -b topic-B main
$ git merge --no-ff --no-edit topic-A
$ git am <mbox-for-topic-B
When topic-A gets updated, recreating the first merge and rebasing
the rest of the topic-B, all on detached HEAD, is a useful
technique. After updating topic-A with its new round of patches:
$ git checkout topic-B
$ prev=$(git rev-parse 'HEAD^{/^Merge branch .topic-A. into}')
$ git checkout --detach $prev^1
$ git merge --no-ff --no-edit topic-A
$ git rebase --onto HEAD $prev @{-1}^0
$ git checkout -B @{-1}
This will
(0) check out the current topic-B.
(1) find the previous merge of topic-A into topic-B.
(2) detach the HEAD to the parent of the previous merge.
(3) merge the updated topic-A to it.
(4) reapply the patches to rebuild the rest of topic-B.
(5) update topic-B with the result.
without contaminating the reflog of topic-B too much. topic-B@{1}
is the "logically previous" state before topic-A got updated, for
example. At (4), comparison (e.g. range-diff) between HEAD and
@{-1} is a meaningful way to sanity check the result, and the same
can be done at (5) by comparing topic-B and topic-B@{1}.
But there is one glitch. The merge into the detached HEAD done in
the step (3) above gives us "Merge branch 'topic-A' into HEAD", and
does not say "into topic-B".
Teach the "--into-name=<branch>" option to "git merge" and its
underlying "git fmt-merge-message", to pretend as if we were merging
into <branch>, no matter what branch we are actually merging into,
when they prepare the merge message. The pretend name honors the
usual "into <target>" suppression mechanism, which can be seen in
the tests added here.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-20 22:53:43 +00:00
|
|
|
const char *into_name;
|
2020-03-24 01:07:51 +00:00
|
|
|
};
|
|
|
|
|
|
2011-10-07 06:12:09 +00:00
|
|
|
extern int merge_log_config;
|
2019-04-29 08:28:14 +00:00
|
|
|
int fmt_merge_msg_config(const char *key, const char *value, void *cb);
|
2020-03-24 01:07:51 +00:00
|
|
|
int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
|
|
|
|
|
struct fmt_merge_msg_opts *);
|
|
|
|
|
|
2011-10-07 06:12:09 +00:00
|
|
|
|
|
|
|
|
#endif /* FMT_MERGE_MSG_H */
|