+ if ($? == -1) {
+ warn "Failed to execute git: $!\n";
+ return;
+ }
+ my $ret;
+ $ret = WEXITSTATUS($?) if WIFEXITED($?);
+ my $sig;
+ if (WIFSIGNALED($?)) {
+ $sig = WTERMSIG($?);
+ warn "git died with signal $sig\n";
+ if ($sig == SIGINT || $sig == SIGQUIT) {
+ warn "Aborting.\n";
+ exit $sig;
+ }
+ } elsif ($ret) {
+ warn "git returned $ret\n";
+ }
+ return wantarray ? ($ret, $sig) : $ret;