Re: Question about patterns

[Chet Ramey]

On 6/23/11 9:59 AM, Steven W. Orr wrote:
> I may be wrong, but I think there's a way to do what I want without using a
> regex.
> 
> I have a file called foo-1.2-3.tar.gz
> I need to set a variable equal to
> foo-1.2-i386-x86_64-3.tar.gz
> 
> Is there a way to do this without parsing my brains out? I am facile with
> the variable operations like # ## % %% and /, but what I really want to do
> is to say something like
> 
> bar=${foo/-([1-9]).tar.gz/-i386-x86_64-\1.tar.gz}
> 
> where the \1 is some sort of thing that I can use to refer to a backref.
> Does this exist in bash or do I just do it with a regex?

Bash pattern substitutions are simple strings, not regular expressions.
They do not have backreferencing.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/