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#!/bin/sh
#
# Script to clean binary files.
#
# JPackage Project <http://www.jpackage.org/>
#
# $Id: check-binary-files,v 1.1 2006/09/19 19:39:37 fnasser Exp $

# Import java functions
[ -r /usr/share/java-utils/java-functions ] \
 &&  . /usr/share/java-utils/java-functions || exit 1

# Prints help message
usage() {
	/bin/cat >&2 << EOF_USAGE

Usage: $0 -f instructions_file [-a archive_file]

Options:
	-a - Archive file on which actions will be performed, as opposed to 
	     current directory
	-f - The instructions file to check against.
EOF_USAGE
	exit 2
}

[ "$1" = "--help" ] && usage

[ "$#" = 0 ] && usage

set_javacmd || exit 3
check_java_env || exit 4
set_jvm_dirs || exit 5

# Directory in which script was invoked
_WORKING_DIR=`pwd`

# Run-time variables
_ARCHIVE_FILE=""
_KEEP_LIST=""
_REMOVE_LIST=""
_INSTRUCTIONS_FILE=""

# Directory where archive is extracted, if we are working with one
_ARCHIVE_EXTRACTION_DIR=/tmp/_cbr_archive_dir.$$

# Adds to the appropriate (keep/remove) list
add_to_keep_or_remove_list() {

	if [ $1 = "keep" ]; then

		shift

		if [ -z "$_KEEP_LIST" ]; then
			_KEEP_LIST=$*
		else
			_KEEP_LIST=${_KEEP_LIST}"|"$*
		fi
	else

		shift

		if [ -z "$_REMOVE_LIST" ]; then
			_REMOVE_LIST=$*
		else
			_REMOVE_LIST=${_REMOVE_LIST}"|"$*
		fi
	fi
}

# Ensures that files in kee/remove list exist on disk, and vice-versa
ensure_files_exist() {

	_old_ifs=$IFS
	IFS="|"

	_had_errors=0

	for file in $_KEEP_LIST; do
		if [ ! -f $file ]; then
			echo "ERROR: File $file should exist, but does not."
			_had_errors=1
		fi
	done

	for file in $_REMOVE_LIST; do
		if [ -f $file ]; then
			echo "ERROR: File $file should not exist, but does."
			_had_errors=1
		fi
	done

	IFS=$_old_ifs

	if [ $_had_errors -eq 1 ]; then
		exit 7
	fi

}

while [ $# -gt 0 ] ; do
	case "$1" in
		-f)
			if [ ! -f $2 ] ; then
				echo "$0: error: Could not find instructions file!"
				exit 6;
			fi

			while read line; do

				echo $line | grep ^% >& /dev/null
				if [ $? -eq 0 ] || [ "$line" = "" ]; then
					continue
				fi

				_type=`echo $line | awk '{print $1}'`
				_value=`echo $line | awk '{ printf "%s", $2; for (i = 3; i <= NF; i=i+1) printf " %s", $i }'`

				add_to_keep_or_remove_list $_type $_value

			done < $2

			_INSTRUCTIONS_FILE="$2"

			shift
		;;
		-a)
			_ARCHIVE_FILE="$2"
			shift
		;;
		*)
			echo "ERROR: Unknown argument $1"
			exit 6
		;;
	esac
	shift
done

if [ "$_INSTRUCTIONS_FILE" = "" ]; then
	echo "ERROR: Instructions file must be specified."
	exit 6
fi

# If we are dealing with an archive file, we need to extract things somewhere, and do our actions in there
if [ ! -z $_ARCHIVE_FILE ]; then
	rm -rf $_ARCHIVE_EXTRACTION_DIR
	mkdir -p $_ARCHIVE_EXTRACTION_DIR
	pushd $_ARCHIVE_EXTRACTION_DIR >& /dev/null
	tar xf $_WORKING_DIR/`basename $_ARCHIVE_FILE`
fi

ensure_files_exist

if [ ! -z $_ARCHIVE_FILE ]; then

	_archive_basename=`basename $_ARCHIVE_FILE`
	_arch_name=${_archive_basename%%.*}
	_arch_ext=${_archive_basename#*.}

	_compression_flag=""

	echo $_ARCHIVE_FILE | grep gz$ >& /dev/null
	if [ $? -eq 0 ]; then
		_compression_flag=z
	fi

	echo $_ARCHIVE_FILE | grep bz2$ >& /dev/null
	if [ $? -eq 0 ]; then
		_compression_flag=f
	fi

	tar cf$_compression_flag $_WORKING_DIR/$_arch_name-clean.$_arch_ext *

	popd >& /dev/null
	rm -rf $_ARCHIVE_EXTRACTION_DIR
fi

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