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branch: use branch_checked_out() when deleting refs
This is the last current use of find_shared_symref() that can easily be replaced by branch_checked_out(). The benefit of this switch is that the code is a bit simpler, but also it is faster on repeated calls. The remaining uses of find_shared_symref() are non-trivial to remove, so we probably should not continue in that direction: * builtin/notes.c uses find_shared_symref() with "NOTES_MERGE_REF" instead of "HEAD", so it doesn't have an immediate analogue with branch_checked_out(). Perhaps we should consider extending it to include that symref in addition to HEAD, BISECT_HEAD, and REBASE_HEAD. * receive-pack.c checks to see if a worktree has a checkout for the ref that is being updated. The tricky part is that it can actually decide to update the worktree directly instead of just skipping the update. This all depends on the receive.denyCurrentBranch config option. The implementation currenty cares about receiving the worktree in the result, so the current branch_checked_out() prototype is insufficient currently. This is something to investigate later, though, since a large number of refs could be updated at the same time and using the strmap implementation of branch_checked_out() could be beneficial. Signed-off-by: Derrick Stolee <derrickstolee@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -253,12 +253,11 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
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name = mkpathdup(fmt, bname.buf);
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if (kinds == FILTER_REFS_BRANCHES) {
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const struct worktree *wt =
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find_shared_symref(worktrees, "HEAD", name);
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if (wt) {
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const char *path;
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if ((path = branch_checked_out(name))) {
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error(_("Cannot delete branch '%s' "
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"checked out at '%s'"),
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bname.buf, wt->path);
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bname.buf, path);
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ret = 1;
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continue;
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}
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@ -37,7 +37,10 @@ test_expect_success 'refuse to overwrite: checked out in worktree' '
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for i in 1 2 3 4
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do
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test_must_fail git branch -f wt-$i HEAD 2>err
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grep "cannot force update the branch" err || return 1
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grep "cannot force update the branch" err &&
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test_must_fail git branch -D wt-$i 2>err
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grep "Cannot delete branch" err || return 1
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done
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'
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