Re: [PATCH] receive-pack: simplify run_update_post_hook()

> On Fri, Mar 17, 2017 at 11:02:13PM +0100, René Scharfe wrote:
>
>> Instead of counting the arguments to see if there are any and then
>> building the full command use a single loop and add the hook command
>> just before the first argument.  This reduces duplication and overall
>> code size.
>
> Yeah, I agree one loop is nicer.
>
>> -	argv_array_push(&proc.args, hook);
>>  	for (cmd = commands; cmd; cmd = cmd->next) {
>>  		if (cmd->error_string || cmd->did_not_exist)
>>  			continue;
>> +		if (!proc.args.argc)
>> +			argv_array_push(&proc.args, hook);
>>  		argv_array_push(&proc.args, cmd->ref_name);
>>  	}
>> +	if (!proc.args.argc)
>> +		return;
>
> It looks at first like the result leaks, because you have to realize
> that the push will modify proc.args.argc. I wonder if:
>
>   argv_array_push(&proc.args, hook);
>   for (cmd = commands; cmd; cmd = cmd->next) {
> 	if (!cmd->error_string && !cmd->did_not_exist)
> 		argv_array_push(&proc.args, cmd->ref_name);
>   }
>
>   if (proc.args.argc == 1) {
> 	argv_array_clear(&proc.args);
> 	return;
>   }
>
> would be more obvious (at the cost of a pointless malloc in the corner
> case. I can live with it either way.