Re: [PATCH v7 13/17] ref-filter: add `:dir` and `:base` options for ref printing atoms

["Jakub Narębski" <jnareb@gmail.com>]

W dniu 20.11.2016 o 18:32, Junio C Hamano pisze:
> Karthik Nayak <karthik.188@gmail.com> writes:
> 
>> We could have lstrip and rstrip as you suggested and perhaps make
>> it work together too. But I see this going off the scope of this
>> series. Maybe I'll follow up with another series introducing these
>> features. Since we can currently make do with 'strip=2' I'll drop
>> this patch from v8 of this series and pursue this idea after this.
> 
> My primary point was that if we know we want to add "rstrip" later
> and still decide not to add it right now, it is OK, but we will
> regret it if we named the one we are going to add right now "strip".
> That will mean that future users, when "rstrip" is introduced, will
> end up having to choose between "strip" and "rstrip" (as opposed to
> "lstrip" and "rstrip"), wondering why left-variant is more important
> and named without left/right prefix.

Another solution would be to implement 'splice=<offset>[,<length>]',
where if length is omitted it means to the end; perhaps with special
casing (as in Perl) of negative <offset> and/or negative <length>.

Or implement POSIX shell expansion:

  %(parameter%word)  - Remove Smallest Suffix Glob Pattern.
  %(parameter%%word) - Remove Largest Suffix Glob Pattern.
  %(parameter#word)  - Remove Smallest Prefix Pattern.
  %(parameter##word) - Remove Largest Prefix Pattern.

Though this one looks like serious overkill...

-- 
Jakub Narębski