#!/bin/sh
# Read .java files in source directory,
#   copying lines from the first line matching
#   the start pattern to the end of the file
#   to a file of the same name in the target directory
#
# Designed to be used to remove license header and imports from
#    annotation and enum files in the JDO api project for import
#    into the FrameMaker specification
#
# Tested on cygwin and Mac
#
USAGE="behead <source dir> <target dir>"
if [ $# -ne 2 ]
    then
        echo $USAGE
        exit -1
fi

SRCDIR=$1
TARGETDIR=$2

STARTPATTERN="^@"
ENUMSTARTPATTERN="public enum"

for FILE in `ls $SRCDIR/*.java`
do
    ROOT=`basename $FILE .java`
    OUTFILE=${TARGETDIR}/${ROOT}.txt
    IS_ENUM=0
    if [ `grep -c "public enum" $FILE` -gt 0 ]
    then
        STARTINDEX=`grep --max-count=1 -n "${ENUMSTARTPATTERN}" $FILE | cut -d: -f1 `
        IS_ENUM=1
    else
        STARTINDEX=`grep --max-count=1 -n $STARTPATTERN $FILE | cut -d: -f1 `
        IS_ENUM=0
    fi
        #echo $STARTINDEX
        ENDINDEX=`wc -l $FILE | sed -e "s/^  *//" | cut -f1 -d" " `
        #echo $ENDINDEX
        NUMLINES=`expr $ENDINDEX - $STARTINDEX + 1`
        echo Copying ${NUMLINES} lines from $FILE to $OUTFILE
        if [ ${IS_ENUM} -eq 1 ]
        then
            # Workaround for Frame bug: Add blank line at beginning
            tail -n ${NUMLINES} $FILE | sed -e "1H" -e "1g" > ${OUTFILE}
        else
            tail -n ${NUMLINES} $FILE > ${OUTFILE}
        fi
done