#!/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, enum, and other java files in the JDO api project
#    for import into the FrameMaker specification
#
# Tested on cygwin, Linux, and Mac
#
USAGE="behead <source dir> <target dir>"
if [ $# -ne 2 ]
    then
        echo $USAGE
        exit -1
fi

SRCDIR=$1
TARGETDIR=$2

for FILE in `ls $SRCDIR/*.java`
do
    ROOT=`basename $FILE .java`
    OUTFILE=${TARGETDIR}/${ROOT}.txt

    # get appropriate start point for this file type
    if [ `grep -c "public enum" $FILE` -gt 0 ]
    then
        STARTPATTERN="public enum"
    elif [ `grep -c "public class" $FILE` -gt 0 ]
    then
        STARTPATTERN="public class"
    elif [ `grep -c "public interface" $FILE` -gt 0 ]
    then
        STARTPATTERN="public interface"
    elif [ `grep -c "^@" $FILE` -gt 0 ]
    then
        STARTPATTERN="^@"
    else 
        echo "Warning: no start point found for copying lines from $FILE"
        continue
    fi

    STARTINDEX=`grep --max-count=1 -n "${STARTPATTERN}" $FILE | cut -d: -f1 `
    ENDINDEX=`wc -l $FILE | sed -e "s/^  *//" | cut -f1 -d" " `
    NUMLINES=`expr $ENDINDEX - $STARTINDEX + 1`

    echo Copying ${NUMLINES} lines from $FILE to $OUTFILE
    # Workaround for Frame bug: Add blank line at beginning
    tail -n ${NUMLINES} $FILE | sed -e "1H" -e "1g" > ${OUTFILE}
done