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remote: use the configured default branch name when appropriate 

When guessing the default branch name of a remote, and there are no refs
to guess from, we want to go with the preference specified by the user
for the fall-back, i.e. the default name to be used for the initial
branch of new repositories (because as far as the user is concerned, a
remote that has no branches yet is a new repository).

At the same time, when talking to an older Git server that does not
report a symref for `HEAD` (but instead reports a commit hash), let's
try to guess the configured default branch name first. If it does not
match the reported commit hash, let's fall back to `master` as before.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2020-06-24 14:46:35 +00:00 committed by Junio C Hamano
parent 0cc1b475bb
commit a471214bd6
2 changed files with 21 additions and 4 deletions
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14
remote.c
View File

@ -276,7 +276,7 @@ static void read_branches_file(struct remote *remote)
/*
* The branches file would have URL and optionally
* #branch specified. The "master" (or specified) branch is
* #branch specified. The default (or specified) branch is
* fetched and stored in the local branch matching the
* remote name.
*/
@ -284,7 +284,7 @@ static void read_branches_file(struct remote *remote)
if (frag)
*(frag++) = '\0';
else
frag = "master";
frag = (char *)git_default_branch_name();
add_url_alias(remote, strbuf_detach(&buf, NULL));
strbuf_addf(&buf, "refs/heads/%s:refs/heads/%s",
@ -2097,8 +2097,16 @@ struct ref *guess_remote_head(const struct ref *head,
if (head->symref)
return copy_ref(find_ref_by_name(refs, head->symref));
/* If refs/heads/master could be right, it is. */
/* If a remote branch exists with the default branch name, let's use it. */
if (!all) {
char *ref = xstrfmt("refs/heads/%s", git_default_branch_name());
r = find_ref_by_name(refs, ref);
free(ref);
if (r && oideq(&r->old_oid, &head->old_oid))
return copy_ref(r);
/* Fall back to the hard-coded historical default */
r = find_ref_by_name(refs, "refs/heads/master");
if (r && oideq(&r->old_oid, &head->old_oid))
return copy_ref(r);

11
t/t5606-clone-options.sh
View File

@ -47,7 +47,16 @@ test_expect_success 'guesses initial branch name correctly' '
test_commit -C initial-branch no-spoilers &&
git -C initial-branch branch abc guess &&
git clone initial-branch is-it &&
test refs/heads/guess = $(git -C is-it symbolic-ref HEAD)
test refs/heads/guess = $(git -C is-it symbolic-ref HEAD) &&
git -c init.defaultBranch=none init --bare no-head &&
git -C initial-branch push ../no-head guess abc &&
git clone no-head is-it2 &&
test_must_fail git -C is-it2 symbolic-ref refs/remotes/origin/HEAD &&
git -C no-head update-ref --no-deref HEAD refs/heads/guess &&
git -c init.defaultBranch=guess clone no-head is-it3 &&
test refs/remotes/origin/guess = \
$(git -C is-it3 symbolic-ref refs/remotes/origin/HEAD)
'
test_done