[pca] multiple patterns

[Martin Paul]

Floyd, Chuck wrote:
> Is there a way for me to put in multiple pattern matches?  For example,
> I want to match Veritas patches with "VRTS|VERITAS|Veritas|SYMC" but not
> NetBackup.

Unfortunately not. You can only combine your pattern with "ignore" 
statements for all the NetBackup patch IDs that match.

Some time ago I had put support for multiple pattern options into pca. 
It turned out to be not that easy - the question was whether multiple 
patterns should be logically ANDed or ORed. Both of them make sense in 
different situations:

- you need OR to specify e.g. patches which match "VRTS" or "Veritas"
- you need AND to specify patches which also match NOT "NetBackup".

So I would have to add a complete pattern parser supporting AND/OR/NOT 
plus parantheses for grouping. That's too complicated IMO.

Martin.