if cat -A ${file} | grep '\^M\\$' >/dev/null || file ${file} | grep "with CRLF line terminators" >/dev/null ; then

which dos2unix >/dev/null 2>&1 || yum -q -y install dos2unix || apt-get -qq -y install dos2unix

dos2unix ${file} >/dev/null

fi

tmp_file=/tmp/.noComment_$(date +%Y%m%d%H%M%S%N$RANDOM)

cp ${file} ${tmp_file}

#delete the comment line begin with '//comment'

sed -i "/^[ \t]*\/\//d" ${tmp_file}

#delete the comment line end with '//comment'

sed -i "s/\/\/[^\"]*//" ${tmp_file}

#delete the comment only occupied one line '/* comment */'

sed -i "s/\/\*.*\*\///" ${tmp_file}

#delete the comment that occupied many lines '/*comment

# *comment

# */

sed -i "/^[ \t]*\/\*/,/.*\*\//d" ${tmp_file}

grep -v ^$ ${tmp_file}

\rm -f ${tmp_file}

#ignore the comment line end with '# comment'

grep -v "^[ \t]*\#" ${file} | grep -v "^$"

# pcresyntax(3) and pcrepattern(3), but only work if pcre is available in the system.

if test -f ${file} && file ${file} | grep "XML" >/dev/null; then

which tidy >/dev/null 2>&1 || yum -q -y install tidy >/dev/null 2>&1 || apt-get -qq -y install tidy >/dev/null 2>&1

tidy -quiet -asxml -xml -indent -wrap 1024 --hide-comments 1 ${file}

else

which tidy >/dev/null 2>&1 || yum -q -y install tidy >/dev/null 2>&1 || apt-get -qq -y install tidy >/dev/null 2>&1

tidy -quiet -asxml -xml -indent -wrap 1024 --hide-comments 1 ${file}

fi

#ignore the comment line end with '# comment'

grep -v "^[ \t]*\#" ${file} | grep -v "^[ \t]*\;" |grep -v "^$"

# TODO(Guodong Ding) comment style in python using ''', """

case ${file} in

*.c|*.cpp|*.h)

del_comment_in_c_cpp_file

;;

*.sh|*.conf)

del_comment_in_sh_conf_file

;;

*.xml)

del_comment_in_xml_file

;;

*)

del_comment_in_general_file

;;

esac