Description:

grin is a similar in function to GNU grep, however it's has modified
behaviour to make it simpler to use when grepping source code.

Some features grin feature are:

* recurse directories by default
* do not go into directories with specified names
* do not search files with specified extensions
* be able to show context lines before and after matched lines
* Python regex syntax
* unless suppressed via a command line option, display the filename
regardless of the number of files
* accept a file (or stdin) with a list of newline-separated filenames
* grep through gzipped text files
* be useful as a library to build custom tools quickly