#!/bin/sh
#
# lookin
#
# AUTHOR:
#   Dan Harkless                                                    <opensource@
#   http://harkless.org/dan/software/                              harkless.org>
# 
# COPYRIGHT:
#   This file is Copyright (C) 2003 by Dan Harkless, and is released under the
#   GNU General Public License <http://www.gnu.org/copyleft/gpl.html>.
#
# USAGE:
#   % lookin '<filename_pattern>' '<egrep_expr>'
#   % lookin -src '<egrep_expr>'
#
# DESCRIPTION:
#   When looking for strings in a file hierarchy, it's a pain to have to type
#   out big long 'find' commands.  This script provides a simple and intuitive
#   syntax for having 'find' call my 'bgrep' command on filenames matching a
#   specific pattern.  For instance, you can type:
#
#       % lookin '*.el' emacs-version
#
#   find's filename wildcarding is not as powerful as full regular expressions,
#   so unfortunately it isn't possible to specify some complex name tests with
#   this script.  The most common file category I need to grep through, in fact,
#   is one of these -- assembly, C, and C++ files.  Therefore, there's a special
#   'lookin -src' variant that looks through such files:
#
#       % lookin -src exit
#
# DATE        MODIFICATION
# ==========  ==================================================================
# 2003-03-30  Renamed bgrep's -b option as --blank now that it can accept egrep
#             options (one of which is called -b).
# 1998-02-24  Original.

if [ $# -lt 2 ]; then
    echo "usage: lookin '<filename_pattern>' '<egrep_expr>'"
    echo "usage: lookin -src '<egrep_expr>'"
    exit 1
fi

if [ X$1 = X-src ]; then
    find * -follow \( -name "*.[chsS]" -o -name "*.[ch]pp" \) \
         -exec bgrep --blank "$2" {} \;
else
    find * -follow -name "$1" -exec bgrep --blank "$2" {} \;
fi