Merge branch 'bg/install-branch-config-skip-prefix'

* bg/install-branch-config-skip-prefix:
  branch: use skip_prefix() in install_branch_config()
  t3200-branch: test setting branch as own upstream

branch.c

@@ -1,3 +1,4 @@
+#include "git-compat-util.h"
 #include "cache.h"
 #include "branch.h"
 #include "refs.h"
@@ -49,12 +50,11 @@ static int should_setup_rebase(const char *origin)
 
 void install_branch_config(int flag, const char *local, const char *origin, const char *remote)
 {
-	const char *shortname = remote + 11;
-	int remote_is_branch = starts_with(remote, "refs/heads/");
+	const char *shortname = skip_prefix(remote, "refs/heads/");
 	struct strbuf key = STRBUF_INIT;
 	int rebasing = should_setup_rebase(origin);
 
-	if (remote_is_branch
+	if (shortname
 	    && !strcmp(local, shortname)
 	    && !origin) {
 		warning(_("Not setting branch %s as its own upstream."),
@@ -77,29 +77,29 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
 	strbuf_release(&key);
 
 	if (flag & BRANCH_CONFIG_VERBOSE) {
-		if (remote_is_branch && origin)
+		if (shortname && origin)
 			printf_ln(rebasing ?
 				  _("Branch %s set up to track remote branch %s from %s by rebasing.") :
 				  _("Branch %s set up to track remote branch %s from %s."),
 				  local, shortname, origin);
-		else if (remote_is_branch && !origin)
+		else if (shortname && !origin)
 			printf_ln(rebasing ?
 				  _("Branch %s set up to track local branch %s by rebasing.") :
 				  _("Branch %s set up to track local branch %s."),
 				  local, shortname);
-		else if (!remote_is_branch && origin)
+		else if (!shortname && origin)
 			printf_ln(rebasing ?
 				  _("Branch %s set up to track remote ref %s by rebasing.") :
 				  _("Branch %s set up to track remote ref %s."),
 				  local, remote);
-		else if (!remote_is_branch && !origin)
+		else if (!shortname && !origin)
 			printf_ln(rebasing ?
 				  _("Branch %s set up to track local ref %s by rebasing.") :
 				  _("Branch %s set up to track local ref %s."),
 				  local, remote);
 		else
-			die("BUG: impossible combination of %d and %p",
-			    remote_is_branch, origin);
+			die("BUG: impossible combination of %p and %p",
+			    shortname, origin);
 	}
 }
 

t/t3200-branch.sh

@@ -507,6 +507,16 @@ EOF
 	test_cmp expected actual
 '
 
+test_expect_success '--set-upstream-to notices an error to set branch as own upstream' '
+	git branch --set-upstream-to refs/heads/my13 my13 2>actual &&
+	cat >expected <<-\EOF &&
+	warning: Not setting branch my13 as its own upstream.
+	EOF
+	test_expect_code 1 git config branch.my13.remote &&
+	test_expect_code 1 git config branch.my13.merge &&
+	test_i18ncmp expected actual
+'
+
 # Keep this test last, as it changes the current branch
 cat >expect <<EOF
 $_z40 $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000	branch: Created from master