se_csc

#!/bin/bash
# Last updated on 9 Aug 2019

#set -x
src=`pwd | grep -o ".*OCTEON-SDK"`
i=10
if [ "$src" != "" ] && [ -f $src/cscope.out ]; then
		echo "In SDK directory"
		i=0
else 
		src=.
fi

GREP_IGNORE=""
IGNORE_LIST=""
APPEND_LIST=""
LAST_IGNORE_LIST=""
LAST_APPEND_LIST=""
rebuild=0
follow_symlinks=0 
cscope_opt="-p 7 -d -C"
fullclean=0
while getopts "p:i:a:lrsR" opt; do
  case $opt in
    l)  
      src=.
      i=0
      echo "Forced to use local cscope.out"
      ;; 
    p)
      cscope_opt="$cscope_opt -p$OPTARG"
      ;;
    r)
      rebuild=1
      ;;
    R)
      rebuild=1
      fullclean=1
      ;;
    s)
      follow_symlinks=1
      ;;
    i)
      IGNORE_LIST="$OPTARG $IGNORE_LIST"
      ;;
    a)
      T=`realpath $OPTARG`
      APPEND_LIST="$T $APPEND_LIST"
      ;;
    \?) 
      echo "Invalid option: -$OPTARG" >&2
      echo "Usage: $(basename $0) [-lrs] [-i <dir_name>] [ -p <dir count> ]"
      echo "\t\t -l Force local dir cscope build"
      echo "\t\t -s follow symlinks in cscope build"
      echo "\t\t -i <dir_name> ignore directory"
      echo "\t\t -a <dir_name> append directory to sources"
      exit 1
      ;;  
  esac
done

lsrc=.
while [[ $i -ne 0 ]];
do

	if [ -f $lsrc/cscope.out ]; then
		src=$lsrc
		break
	fi
	lsrc=$lsrc/..
	i=`expr $i - 1`
done

if [[ $rebuild -ne 0 ]] && [ -f $src/cscope.out ]
then
	echo "Removing old cscope DB files for rebuild "
	rm -vf $src/cscope.out $src/cscope.in.out $src/cscope.po.out
	rm -vf $src/cscope.files
	if [[ $fullclean -ne 0 ]] && [ -f $src/cscope.ignore ]
	then
		rm -vf $src/cscope.ignore
	fi
fi

# Look for preconfigured opt
if [ -f $src/cscope.opt ]
then
	. $src/cscope.opt

	for d in $LAST_IGNORE_LIST
	do
		IGNORE_LIST="$IGNORE_LIST $d"
	done
	
	for d in $LAST_APPEND_LIST
	do
		APPEND_LIST="$APPEND_LIST $d"
	done

	rm -rf $src/cscope.opt.bkp
	mv $src/cscope.opt $src/cscope.opt.bkp
	echo "APPEND_LIST=$APPEND_LIST"
	echo "IGNORE_LIST=$IGNORE_LIST"
fi

# Save back options
if [[ "$IGNORE_LIST" != "" ]] || [[ "$APPEND_LIST" != "" ]]
then
	echo "LAST_IGNORE_LIST=\"$IGNORE_LIST\"" >$src/cscope.opt
	echo "LAST_APPEND_LIST=\"$APPEND_LIST\"" >>$src/cscope.opt
fi

for d in $IGNORE_LIST
do
	GREP_IGNORE="-e $d $GREP_IGNORE"
done

if [ -f $src/cscope.out ]; then
		echo "Using cscope DB from " $src
else
	echo "Building cscope DB from " $src
	if [[ $follow_symlinks -ne 1 ]]; then
		find_opts="-H"
	else
		find_opts="-L"
	fi
	pushd $src

	rm -rf cscope.files
	for dir in $PWD $APPEND_LIST
	do
		find $find_opts $dir -name "*.[c,h,S,s]" -type f >> cscope.files
		find $find_opts $dir -name "*.cpp" -type f >> cscope.files
		find $find_opts $dir -name "*.lua" -type f >> cscope.files
		find $find_opts $dir -name "*.p4" -type f >> cscope.files
		find $find_opts $dir -name "*.am" -type f >> cscope.files
		find $find_opts $dir -name "*.inc" -type f >> cscope.files
		find $find_opts $dir -name "*.py" -type f >> cscope.files
	done

	if [[ "$GREP_IGNORE" != "" ]]
	then
		echo "Using grep option " "$GREP_IGNORE" "to ignore directories."
		rm cscope.files.bkp
		mv cscope.files cscope.files.bkp
		cat cscope.files.bkp | grep -v $GREP_IGNORE >cscope.files
	fi
	cscope -i cscope.files -qubk
	popd
fi
export CSCOPE_DB=$src/cscope.out
export CSCOPE_DB_VIM=$src/cscope.db.vim
cscope $cscope_opt -f $src/cscope.out
export -n CSCOPE_DB