// get_repo_modtime caches the value in r->mtime, so we don't
// have to worry about inefficiencies here.
if (get_repo_modtime(r1, &t) && get_repo_modtime(r2, &t))
// get_repo_modtime caches the value in r->mtime, so we don't
// have to worry about inefficiencies here.
if (get_repo_modtime(r1, &t) && get_repo_modtime(r2, &t))