Use beagle to read (eh, grep) source code

[Haojun Bao <baohaojun gmail com>]

Hi, all

Beagle put grep on steroid for me:-) Thanks a lot y'all beagle hackers!

The idea is simple and practical, beagle-static-qeury first, then use
grep on the results.

For e.g., to grep "ENGLISH_STOP_WORDS" in the beagle source code, I will
use beagle-static-query:

    beagle-static-query\
     --add-static-backend /src/beagle/.beagle\
     --backend none\
     --max-hits 100000\
     'ENGLISH STOP WORDS'

(note how I figured out the `_' character should be removed when
beagling:-)

Then I will only grep the original regexp target in the following files,
because beagle already decided only these files contain all the 3 words
of 'ENGLISH STOP WORDS':

    /src/beagle/beagled/ExtractContent.cs
    /src/beagle/beagled/LuceneCommon.cs
    /src/beagle/beagled/Lucene.Net/Analysis/Standard/StandardAnalyzer.cs
    /src/beagle/beagled/Lucene.Net/Analysis/StopAnalyzer.cs
    /src/beagle/beagled/Snowball.Net/Lucene.Net/Analysis/Snowball/SnowballAnalyzer.cs
    /src/beagle/NEWS

This way, even with the ~2 gigabytes Andoid source code, you can usually grep
and get the results in a few seconds. Best of all, it works not only
with source code, but with any text files.

If you are intested, the source code is at

   git://github.com/baohaojun/windows-config.git

And there's a detailed README at http://github.com/baohaojun/windows-config/raw/master/gcode/beagle/beagle-grep-readme.org