bug#10472: `realpath --relative-to=<path> /` outputs inconsistent trailing slash

[Pádraig Brady]

On 01/10/2012 10:30 PM, Pádraig Brady wrote:
> On 01/10/2012 09:53 PM, Mike Frysinger wrote:
>> On Tuesday 10 January 2012 15:15:57 Mike Frysinger wrote:
>>> as does these:
>>>     realpath --relative-to=/ /usr
>>>     realpath --relative-to=/ /usr/
>>> which is to say, they show:
>>>     ..
>>
>> sorry, typo here ... these actually output:
>>      ../usr
>>
>> i guess that should be just "usr".
>> -mike
> 
> Agreed. python concurs too:
> 
>>>> os.path.relpath(start='/usr',path='/')
> '..'
>>>> os.path.relpath(start='/',path='/usr')
> 'usr'
> 
> Essentially in these edge cases the relative paths
> printed are valid, but not canonicalised.
> 
> I'll fix it up.

Proposed fix attached.

cheers,
Pádraig.

relpath-edge-cases.diff
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