#!/bin/sh

# Process a gst-plugins-ugly tarball to remove

# unwanted GStreamer plugins.

#

# See https://bugzilla.redhat.com/show_bug.cgi?id=1397261

# for details

#

# Bastien Nocera <bnocera@redhat.com> - 2010

# Yaakov Selkowitz <yselkowi@redhat.com> - 2016

#

SOURCE="$1"

NEW_SOURCE=`echo $SOURCE | sed 's/ugly-/ugly-free-/'`

DIRECTORY=`echo $SOURCE | sed 's/\.tar\.xz//'`

ALLOWED="

xingmux

"

NOT_ALLOWED="

asfdemux

dvdlpcmdec

dvdsub

realmedia

"

error()

{

	MESSAGE=$1

	echo $MESSAGE

	exit 1

}

check_allowed()

{

	MODULE=$1

	for i in $ALLOWED ; do

		if test x$MODULE = x$i ; then

			return 0;

		fi

	done

	# Ignore errors coming from ext/ directory

	# they require external libraries so are ineffective anyway

	return 1;

}

check_not_allowed()

{

	MODULE=$1

	for i in $NOT_ALLOWED ; do

		if test x$MODULE = x$i ; then

			return 0;

		fi

	done

	return 1;

}

rm -rf $DIRECTORY

tar xJf $SOURCE || error "Cannot unpack $SOURCE"

pushd $DIRECTORY > /dev/null || error "Cannot open directory \"$DIRECTORY\""

unknown=""

for subdir in gst ext; do

	for dir in $subdir/* ; do

		# Don't touch non-directories

		if ! [ -d $dir ] ; then

			continue;

		fi

		MODULE=`basename $dir`

		if ( check_not_allowed $MODULE ) ; then

			echo "**** Removing $MODULE ****"

			echo "Removing directory $dir"

			rm -r $dir || error "Cannot remove $dir"

			echo

		elif test $subdir = ext  || test $subdir = sys; then

			# Ignore library or system non-blacklisted plugins

			continue;

		elif ! ( check_allowed $MODULE ) ; then

			echo "Unknown module in $dir"

			unknown="$unknown $dir"

		fi

	done

done

echo

if test "x$unknown" != "x"; then

  echo -n "Aborting due to unknown modules: "

  echo "$unknown" | sed "s/ /\n  /g"

  exit 1

fi

popd > /dev/null

tar cJf $NEW_SOURCE $DIRECTORY

echo "$NEW_SOURCE is ready to use"