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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
Download Patch File Download Diff File Expand all files Collapse all files

14
refs.c
View File

@ -598,10 +598,13 @@ const char *git_default_branch_name(void)
* to name a branch.
*/
static char *substitute_branch_name(struct repository *r,
const char **string, int *len)
const char **string, int *len,
int nonfatal_dangling_mark)
{
struct strbuf buf = STRBUF_INIT;
struct interpret_branch_name_options options = { 0 } ;
struct interpret_branch_name_options options = {
.nonfatal_dangling_mark = nonfatal_dangling_mark
};
int ret = repo_interpret_branch_name(r, *string, *len, &buf, &options);
if (ret == *len) {
@ -615,9 +618,10 @@ static char *substitute_branch_name(struct repository *r,
}
int repo_dwim_ref(struct repository *r, const char *str, int len,
struct object_id *oid, char **ref)
struct object_id *oid, char **ref, int nonfatal_dangling_mark)
{
char *last_branch = substitute_branch_name(r, &str, &len);
char *last_branch = substitute_branch_name(r, &str, &len,
nonfatal_dangling_mark);
int refs_found = expand_ref(r, str, len, oid, ref);
free(last_branch);
return refs_found;
@ -661,7 +665,7 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
struct object_id *oid, char **log)
{
struct ref_store *refs = get_main_ref_store(r);
char *last_branch = substitute_branch_name(r, &str, &len);
char *last_branch = substitute_branch_name(r, &str, &len, 0);
const char **p;
int logs_found = 0;
struct strbuf path = STRBUF_INIT;