#!/bin/sh

# Process a gst-plugins-bad tarball to remove
# unwanted GStreamer plugins.
#
# See https://bugzilla.redhat.com/show_bug.cgi?id=532470
# for details
#
# Bastien Nocera <bnocera@redhat.com> - 2010
#

SOURCE="$1"
NEW_SOURCE=`echo $SOURCE | sed 's/bad-/bad-free-/'`
DIRECTORY=`echo $SOURCE | sed 's/\.tar\.bz2//'`

ALLOWED="
aacparse
adpcmdec
adpcmenc
aiff
aiffparse
amrparse
audioparsers
autoconvert
bayer
camerabin
cdxaparse
coloreffects
dataurisrc
dccp
debugutils
dtmf
festival
freeze
frei0r
gaudieffects
geometrictransform
h264parse
hdvparse
id3tag
invtelecine
ivfparse
jpegformat
legacyresample
librfb
liveadder
mve
mpegdemux
mpeg4videoparse
mpegvideoparse
mxf
nsf
nuvdemux
pcapparse
pnm
rawparse
rtpmux
scaletempo
sdp
segmentclip
selector
speed
stereo
subenc
tta
valve
videomaxrate
videomeasure
videosignal
vmnc
"

NOT_ALLOWED="
asfmux
dvdspu
mpegpsmux
mpegtsmux
qtmux
real
siren
"

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\""

for subdir in gst ext sys; 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 $dir"
			if grep -q "AG_GST_CHECK_PLUGIN($MODULE)" configure.ac ; then
				echo "Removing element check for $MODULE"
				grep -v "AG_GST_CHECK_PLUGIN($MODULE)" configure.ac > configure.ac.new && mv configure.ac.new configure.ac
			fi
			echo "Removing Makefile generation for $MODULE"
			grep -v "$dir/Makefile" configure.ac > configure.ac.new && mv configure.ac.new configure.ac
			# Urgh
			if test $MODULE = mpegtsmux ; then
				grep -v "gst/mpegtsmux/tsmux/Makefile" configure.ac > configure.ac.new && mv configure.ac.new configure.ac
			fi
			if test $MODULE = real ; then
				grep -v "AG_GST_DISABLE_PLUGIN(real)" configure.ac > configure.ac.new && mv configure.ac.new configure.ac
			fi
			echo "Removing documentation for $MODULE"
			if grep -q "$MODULE" docs/plugins/Makefile.am ; then
				grep -v $dir docs/plugins/Makefile.am > docs/plugins/Makefile.am.new && mv docs/plugins/Makefile.am.new docs/plugins/Makefile.am
			fi
			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"
			exit 1
		fi
	done
done

autoreconf

popd > /dev/null

tar cjf $NEW_SOURCE $DIRECTORY
echo "$NEW_SOURCE is ready to use"