Allow --skip to work with regular expressions

[Amwam]

Having an option to be able to specify which branches to skip based on a regular expression.
For example being able to skip any branch beginning with "release", rather than having to specify each branch individually.

[ejoncas]

I ended up doing this manually with grep but it would be pretty cool if the skip option would support regex instead. +1

[MithrilTuxedo]

How should it work?

I'm looking at how this works now, and the meat of the --skip value check is here:
https://github.com/arc90/git-sweep/blob/master/src/gitsweep/base.py#L40

This project is really easy to understand and this looks like an easy thing to change, but I'm thinking of several ways to do it:

• arguments to --skip are treated like regexes
  • introduces false positives if . is in a name
• --skip takes just a regex
  • --skip=x,y,z -> --skip='(x|y|z)'
• prefix regexes in list with something like re:
  • --skip=develop,re:release/.*
• separate --skip-re argument that takes just a regex
  • git-sweep preview --skip=develop --skip-re='release/.*'

[Amwam]

@MithrilTuxedo Its been a while since I tried using this tool, but If I remember correctly, my expectation was just that --skip accepted just a regex (option 2).

Adding another option would work, but probably be a bit confusing, as the new option would be able to do the same as the original, and more.