[PATCH v2 10/12] remote: learn about the possibly-overridden default main branch name

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From: Johannes Schindelin <johannes.schindelin@xxxxxx>

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 main branch
of new repositories (because as far as the user is concerned, a remote
that has no branches yet is a new repository).

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 remote.c                 | 15 ++++++++++-----
 t/t5606-clone-options.sh | 11 ++++++++++-
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/remote.c b/remote.c
index 534c6426f1e..2dcf4ac6d15 100644
--- a/remote.c
+++ b/remote.c
@@ -256,7 +256,7 @@ static void read_remotes_file(struct remote *remote)
 
 static void read_branches_file(struct remote *remote)
 {
-	char *frag;
+	char *frag, *main_branch = NULL;
 	struct strbuf buf = STRBUF_INIT;
 	FILE *f = fopen_or_warn(git_path("branches/%s", remote->name), "r");
 
@@ -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 main (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 = main_branch = git_main_branch_name(MAIN_BRANCH_FOR_INIT);
 
 	add_url_alias(remote, strbuf_detach(&buf, NULL));
 	strbuf_addf(&buf, "refs/heads/%s:refs/heads/%s",
@@ -299,6 +299,7 @@ static void read_branches_file(struct remote *remote)
 	strbuf_addf(&buf, "HEAD:refs/heads/%s", frag);
 	refspec_append(&remote->push, buf.buf);
 	remote->fetch_tags = 1; /* always auto-follow */
+	free(main_branch);
 	strbuf_release(&buf);
 }
 
@@ -2097,9 +2098,13 @@ 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 main branch name, let's use it. */
 	if (!all) {
-		r = find_ref_by_name(refs, "refs/heads/master");
+		char *name = git_main_branch_name(MAIN_BRANCH_FULL_NAME |
+						  MAIN_BRANCH_FOR_INIT);
+
+		r = find_ref_by_name(refs, name);
+		free(name);
 		if (r && oideq(&r->old_oid, &head->old_oid))
 			return copy_ref(r);
 	}
diff --git a/t/t5606-clone-options.sh b/t/t5606-clone-options.sh
index 98b2d8527f6..61ce9c09920 100755
--- a/t/t5606-clone-options.sh
+++ b/t/t5606-clone-options.sh
@@ -49,7 +49,16 @@ test_expect_success 'guesses main branch name correctly' '
 	git -C main-branch branch abc guess &&
 	git clone main-branch is-it &&
 	test guess = $(git -C is-it config core.mainBranch) &&
-	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 main-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
-- 
gitgitgadget




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