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wt-status: tolerate dangling marks

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When a user checks out the upstream branch of HEAD, the upstream branch
not being a local branch, and then runs "git status", like this:

  git clone $URL client
  cd client
  git checkout @{u}
  git status

no status is printed, but instead an error message:

  fatal: HEAD does not point to a branch

(This error message when running "git branch" persists even after
checking out other things - it only stops after checking out a branch.)

This is because "git status" reads the reflog when determining the "HEAD
detached" message, and thus attempts to DWIM "@{u}", but that doesn't
work because HEAD no longer points to a branch.

Therefore, when calculating the status of a worktree, tolerate dangling
marks. This is done by adding an additional parameter to
dwim_ref() and repo_dwim_ref().

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Tan
2020-09-01 15:28:09 -07:00
committed by Junio C Hamano
parent ec06b05568
commit f24c30e0b6
19 changed files with 60 additions and 29 deletions
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2
branch.c
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@ -281,7 +281,7 @@ void create_branch(struct repository *r,
die(_("Not a valid object name: '%s'."), start_name);
}
switch (dwim_ref(start_name, strlen(start_name), &oid, &real_ref)) {
switch (dwim_ref(start_name, strlen(start_name), &oid, &real_ref, 0)) {
case 0:
/* Not branching from any existing branch */
if (explicit_tracking)