I want to provide the users of my command-line script a way to select some objects based on one or more criteria. I figure that the syntax for Unix's find is ideal as most of them are already familiar with it. Examples:

# select all stones
% stone.pl
% stone.pl '*'

# select only stones whose names match a wildcard
% stone.pl 'p*'

# blue stones starting with p
% stone.pl 'p*' -color blue

# blue or green stones
% stone.pl 'p*' -color blue -o -color green

# discard stones tagged as expensive and not tagged as valuable
% stone.pl -tag +expensive -and -tag -valuable -discard

[download]

For converting wildcard to Perl's regex, there's File::KGlob2RE. The hard part for me is implementing the multiple criteria syntax: 'expr -and -expr', 'expr -or expr', '( expr )' and '-not expr'.

Pointers would be appreciated. Hopefully there's something on CPAN I can use as a base.

In reply to How to implement something similar to Unix's find syntax? by dgaramond2

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