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worktree: don't store main worktree twice

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In `get_worktree_ref_store()` we either return the repository's main ref
store, or we look up the ref store via the map of worktree ref stores.
Which of these worktrees gets picked depends on the `is_current` bit of
the worktree, which indicates whether the worktree is the one that
corresponds to `the_repository`.

The bit is getting set in `get_worktrees()`, but only after we have
computed the list of all worktrees. This is too late though, because at
that time we have already called `get_worktree_ref_store()` on each of
the worktrees via `add_head_info()`. The consequence is that the current
worktree will not have been marked accordingly, which means that we did
not use the main ref store, but instead created a new ref store. We thus
have two separate ref stores now that map to the same ref database.

Fix this by setting `is_current` before we call `add_head_info()`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt 2024-06-06 07:29:34 +02:00 committed by Junio C Hamano
parent b5d7db9e83
commit 1339cb3c47
1 changed files with 11 additions and 18 deletions
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29
worktree.c
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@ -53,6 +53,15 @@ static void add_head_info(struct worktree *wt)
wt->is_detached = 1;
}
static int is_current_worktree(struct worktree *wt)
{
char *git_dir = absolute_pathdup(get_git_dir());
const char *wt_git_dir = get_worktree_git_dir(wt);
int is_current = !fspathcmp(git_dir, absolute_path(wt_git_dir));
free(git_dir);
return is_current;
}
/**
* get the main worktree
*/
@ -76,6 +85,7 @@ static struct worktree *get_main_worktree(int skip_reading_head)
*/
worktree->is_bare = (is_bare_repository_cfg == 1) ||
is_bare_repository();
worktree->is_current = is_current_worktree(worktree);
if (!skip_reading_head)
add_head_info(worktree);
return worktree;
@ -102,6 +112,7 @@ struct worktree *get_linked_worktree(const char *id,
worktree->repo = the_repository;
worktree->path = strbuf_detach(&worktree_path, NULL);
worktree->id = xstrdup(id);
worktree->is_current = is_current_worktree(worktree);
if (!skip_reading_head)
add_head_info(worktree);
@ -111,23 +122,6 @@ done:
return worktree;
}
static void mark_current_worktree(struct worktree **worktrees)
{
char *git_dir = absolute_pathdup(get_git_dir());
int i;
for (i = 0; worktrees[i]; i++) {
struct worktree *wt = worktrees[i];
const char *wt_git_dir = get_worktree_git_dir(wt);
if (!fspathcmp(git_dir, absolute_path(wt_git_dir))) {
wt->is_current = 1;
break;
}
}
free(git_dir);
}
/*
* NEEDSWORK: This function exists so that we can look up metadata of a
* worktree without trying to access any of its internals like the refdb. It
@ -164,7 +158,6 @@ static struct worktree **get_worktrees_internal(int skip_reading_head)
ALLOC_GROW(list, counter + 1, alloc);
list[counter] = NULL;
mark_current_worktree(list);
return list;
}