Re: [PATCH 08/14] help.c: Fix detection of custom merge strategy on cygwin

[Ramsay Jones <ramsay@ramsay1.demon.co.uk>]

Johannes Sixt wrote:
> On Dienstag, 14. Dezember 2010, Ramsay Jones wrote:
>> @@ -126,7 +126,10 @@ static int is_executable(const char *name)
>>  	    !S_ISREG(st.st_mode))
>>  		return 0;
>>
>> -#ifdef WIN32
>> +#if defined(WIN32) || defined(__CYGWIN__)
>> +#if defined(__CYGWIN__)
>> +if ((st.st_mode & S_IXUSR) == 0)
>> +#endif
>>  {	/* cannot trust the executable bit, peek into the file instead */
>>  	char buf[3] = { 0 };
>>  	int n;
> 
> Do you gain a lot by this extra condition? Wouldn't
> 
> -#ifdef WIN32
> +#if defined(WIN32) || defined(__CYGWIN__)
> 
> be sufficient?

Yes, that would be sufficient. No, I probably don't gain a great deal
(but I have *not* timed it), since the number of files that are tested
by is_executable() is fairly low anyway since they are already filtered
by a filename prefix (eg. git-merge-).

However, if the executable bit is set, then executing the WIN32 code
block is wasted effort (we already know the answer), so why bother?

ATB,
Ramsay Jones