bash script file to generate ctags and cscope data file for linux kernel project

cscope_kernel.sh

#!/bin/bash

function usage()
{
	echo "Usage: $0 kerneldir arch"
	exit 1
}

if [ "$1" == "" -o "$2" == "" ]
then
	usage
fi

if [[ $1 =~ ^/.* ]]; then
	KERNELDIR=$1
else
	KERNELDIR=$(readlink -f $1)
fi

ARCH=$2

[ -d $KERNELDIR ] || { \
	echo "Invalid kernel directory"; \
	echo "Please specify a valid kernel directory"; \
	exit 1; \
}

[ -d $KERNELDIR/arch/$ARCH ] || { \
	echo "Invalid archecture"; \
	echo "Valid archtures list are"; \
	find $KERNELDIR/arch -mindepth 1 -maxdepth 1 -type d -printf "%f "; \
	echo "";
	exit 1; \
}

WORKING_DIR=kernel_$ARCH
[ -d $WORKING_DIR ] && rm -rf $WORKING_DIR
mkdir -p $WORKING_DIR

OUTDIR=`pwd`/$WORKING_DIR

cd /
find $KERNELDIR \
	-path "$KERNELDIR/arch/*" ! -path "$KERNELDIR/arch/$ARCH" -prune -o \
	-path "$KERNELDIR/include/asm-*" ! -path "$KERNELDIR/asm-$ARCH" -prune -o \
	-path "$KERNELDIR/tmp*" -prune -o \
	-path "$KERNELDIR/Documentation*" -prune -o \
	-path "$KERNELDIR/scripts*" -prune -o \
	-name "*.[chxsS]" -print > $OUTDIR/cscope.files

cd $OUTDIR
cscope -b -q -k
[ -f cscope.files ] && ctags -L cscope.files

echo "Successfully create ctags and cscope file in $OUTDIR"
echo "Done!"