[cmake-developers] LZMA support

[David Cole]

>> Thanks.  Actually I think adding "xz" is incorrect anyway.  We
>> support compressed tarballs, not arbitrary compressed files.
>> Therefore the list should be
>>
>>   7z|bz2|tar\\.gz|tar\\.xz|tgz|txz|zip
>>
>> correct?
>
> Well, then it should be tar.bz2, too. And since this is a regex 
anyway:
>
>    7z|tar\\.bz2|tar\\.[gx]z|t[xg]z|zip

Yes, correct.

I still like the original "list all the extensions separately and 
explicitly" technique rather than "'simplifying' the regex" -- because 
the first one is an "easier to parse as a human being" regex. Also, 
it's "more greppable" if somebody is looking for .gz or .xz or tgz or 
txz.


D