Am 12.01.24 um 00:33 schrieb Michael Lohmann:
> This extends the functionality of `git log --merge` to also work with
> conflicts for rebase, cherry pick and revert.
>
> Signed-off-by: Michael Lohmann <mi.al.lohmann@xxxxxxxxx>
> ---
> Hi everybody!
>
> When Phillip Wood gave me some nice hints on his workflow concerning
> conflicts [1] (we discussed if `--show-current-patch` would make sense
> for cherry pick/revert). When I learned about `git log --merge` I was a
> bit sad to discover that those do not exist for rebase/revert/cherry
> pick since they look really valuable for getting an understanding on
> what was changed. It is basically the counterpart to
> `git show ${ACTION}_HEAD` for understanding the source of the conflict.
>
> I am curious if also other people would be interested in having an easy
> way to get a log of only the relevant commits touching conflicting files
> for said actions.
>
> With this patch I think the functionality is there, just hijacking the
> `--merge` code - maybe an alias like `git log --conflict` or similar
> might be more descriptive now?
>
> What do you think about this idea? (Or am I maybe missing an easy way to
> achieve it with the existing code as well?)
Ha! Very nice patch. For comparison, have a look at my patch to achieve
the same that I never submitted (in particular, the author date):
https://github.com/j6t/git/commit/2327526213bc2fc3c109c1d8b4b0d95032346ff0
This implementation is more complete than mine. I like it.
>
> Michael
>
>
> [1] https://lore.kernel.org/git/cfba7098-3c23-4a81-933c-b7fefdedec8a@xxxxxxxxx/
>
> revision.c | 22 ++++++++++++++++++----
> 1 file changed, 18 insertions(+), 4 deletions(-)
>
> diff --git a/revision.c b/revision.c
> index 2424c9bd67..2e5c00dabd 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -1961,23 +1961,37 @@ static void add_pending_commit_list(struct rev_info *revs,
> }
> }
>
> +static char* get_action_head_name(struct object_id* oid)
> +{
> + if (!repo_get_oid(the_repository, "MERGE_HEAD", oid)) {
> + return "MERGE_HEAD";
> + } else if (!repo_get_oid(the_repository, "REBASE_HEAD", oid)) {
> + return "REBASE_HEAD";
> + } else if (!repo_get_oid(the_repository, "CHERRY_PICK_HEAD", oid)) {
> + return "CHERRY_PICK_HEAD";
> + } else if (!repo_get_oid(the_repository, "REVERT_HEAD", oid)) {
> + return "REVERT_HEAD";
> + } else
> + die("--merge without MERGE_HEAD, REBASE_HEAD, CHERRY_PICK_HEAD or REVERT_HEAD?");
> +}
> +
> static void prepare_show_merge(struct rev_info *revs)
> {
> struct commit_list *bases;
> struct commit *head, *other;
> struct object_id oid;
> const char **prune = NULL;
> + const char *action_head_name;
> int i, prune_num = 1; /* counting terminating NULL */
> struct index_state *istate = revs->repo->index;
>
> if (repo_get_oid(the_repository, "HEAD", &oid))
> die("--merge without HEAD?");
> head = lookup_commit_or_die(&oid, "HEAD");
> - if (repo_get_oid(the_repository, "MERGE_HEAD", &oid))
> - die("--merge without MERGE_HEAD?");
> - other = lookup_commit_or_die(&oid, "MERGE_HEAD");
> + action_head_name = get_action_head_name(&oid);
> + other = lookup_commit_or_die(&oid, action_head_name);
> add_pending_object(revs, &head->object, "HEAD");
> - add_pending_object(revs, &other->object, "MERGE_HEAD");
> + add_pending_object(revs, &other->object, action_head_name);
> bases = repo_get_merge_bases(the_repository, head, other);
> add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING | BOTTOM);
> add_pending_commit_list(revs, bases, UNINTERESTING | BOTTOM);
