Recursively search for text in files based on file-extension from a given starting directory (defaults to cwd)

dofind.sh

#!/bin/bash
#
# Sample usage:
# Find "QObject" in every .hpp / .cpp file located somewhere within /home/zach/coderoot
# dofind.sh "QObject" hs /home/zach/coderoot
#
# Same as above, but begin the search in the current directory, and only check .cpp files
# dofind.sh "QObject" s
#
# Same as above, but specify the file extension manually
# dofind.sh "QObject" *.cc /home/zach/coderoot

SEARCH_TEXT=$1

if [ "$2" = h ]; then
	INCLUDE_PATTERN="*.hpp"
elif [ "$2" = "s" ]; then
	INCLUDE_PATTERN="*.cpp"
elif [ "$2" = "hs" ] || [ "$2" = "sh" ]; then
	INCLUDE_PATTERN="*.[hc]pp"
else
	INCLUDE_PATTERN=$2
fi

# Use user-provided root directory
# or fall-back to the current directory
if [ ! -z "$3" ]; then
	START_PATH=$3
else
	START_PATH="."
fi

# echo $INCLUDE_PATTERN
# echo $SEARCH_TEXT
# echo $START_PATH

grep -rn --include=$INCLUDE_PATTERN --context=3 --color=always $SEARCH_TEXT $START_PATH