branch: only perform HEAD check for local branches

When assembling the ref-filter format to show "git branch"
output, we put the "%(if)%(HEAD)" conditional at the start
of the overall format. But there's no point in checking
whether a remote branch matches HEAD, as it never will.
The check should go inside the local conditional; we
assemble that format inside the "local" strbuf.

By itself, this is just a minor optimization. But in a
future patch, we'll need this refactoring to fix
local-branch coloring.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

builtin/branch.c

@@ -331,8 +331,9 @@ static char *build_format(struct ref_filter *filter, int maxwidth, const char *r
 	struct strbuf local = STRBUF_INIT;
 	struct strbuf remote = STRBUF_INIT;
 
-	strbuf_addf(&fmt, "%%(if)%%(HEAD)%%(then)* %s%%(else)  %%(end)",
+	strbuf_addf(&local, "%%(if)%%(HEAD)%%(then)* %s%%(else)  %%(end)",
 		    branch_get_color(BRANCH_COLOR_CURRENT));
+	strbuf_addf(&remote, "  ");
 
 	if (filter->verbose) {
 		struct strbuf obname = STRBUF_INIT;