Re: [PATCH 4/8] rev-parse: teach "git rev-parse --symbolic" to print the full ref name

From: Steffen Prohaska <prohaska@zib.de>
Date: Oct 28, 2007, 07:58 UTC
Message-ID: <79CE31EE-0975-48EB-8B3E-FC9D6A8EB3E4@zib.de>
In-Reply-To: <7v3avvy9yc.fsf@gitster.siamese.dyndns.org>

On Oct 28, 2007, at 8:28 AM, Junio C Hamano wrote:

Show 14 quoted lines

> Steffen Prohaska <prohaska@zib.de> writes:
>
>> "git rev-parse --symbolic" used to return the ref name as it was
>> specified on the command line. This is changed to returning the
>> full matched ref name, i.e. "git rev-parse --symbolic master"
>> now typically returns "refs/heads/master".
>
> This is to expose "dwim_ref" logic, so it might be a good idea
> to introduce a new option --dwim-ref for this purpose.
>
> 	git rev-parse --symbolic master^2
>
> is designed to give "master^2" or fail if "master" is not a
> merge.

So the idea of --symbolic is really to return the argv as is? No change whatsoever allowed. Why would someone need this? Is it only for convenience when writing shell code?

Show 6 quoted lines

> Similarly, you would diagnose a failure if somebody asks
> to show
>
> 	git rev-parse --dwim-ref master~4
>
> instead of giving "refs/heads/master~4".

What I proposed is to teach git rev-parse to return a full symbolic ref name. Maybe

	git rev-parse --full-symbolic
	git rev-parse --full-ref

But honestly, I don't care that much about this patch. Maybe we just put it aside?

Show 10 quoted lines

>> +static void show_rev(int type, const unsigned char *sha1, const  
>> char *name, const char* real_name)
>> @@ -131,7 +133,7 @@ static void show_default(void)
>>
>>  		def = NULL;
>>  		if (!get_sha1(s, sha1)) {
>> -			show_rev(NORMAL, sha1, s);
>> +			show_rev(NORMAL, sha1, s, 0);
>
> A null pointer constant in git sources is spelled "NULL" not "0".

Ok. I'll fix this in all patches.

Show 11 quoted lines

>> @@ -213,6 +215,7 @@ int cmd_rev_parse(int argc, const char **argv,  
>> const char *prefix)
>>  {
>>  	int i, as_is = 0, verify = 0;
>>  	unsigned char sha1[20];
>> +	char* real_name = 0;
>
> Pointer sign '*' in git sources go next to the name not the
> type, as:
>
> 	char *real_name = NULL;

I know and I tried hard to follow this convention, although I think its the wrong choice ;)

	Steffen