xbps-src: added -V flag to print code version, add new obj into pkg metadata for that.

xbps-src/shutils/metadata.sh

@@ -313,6 +313,8 @@ _EOF
 <string>$short_desc</string>
 <key>long_desc</key>
 <string>$long_desc</string>
+<key>packaged-with</key>
+<string>xbps-src $XBPS_SRC_BUILD_VERSION</string>
 _EOF
 	#
 	# If package sets $dkms_modules, add dkms rundep.

xbps-src/xbps-src.sh.in

@@ -23,7 +23,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #-
-
+readonly XBPS_SRC_BUILD_VERSION=20111109
 XBPS_CONFIG_FILE=@@XBPS_INSTALL_ETCDIR@@/xbps-src.conf
 
 PROGNAME=$(basename $0)
@@ -227,7 +227,7 @@ check_config_vars()
 #
 # main()
 #
-while getopts "CBc:DhKm:p:Ss:" opt; do
+while getopts "CBc:DhKm:p:Ss:V" opt; do
 	case $opt in
 	B) export BUILD_BINPKG=1;;
 	C) export KEEP_WRKSRC=1;;
@@ -251,6 +251,7 @@ while getopts "CBc:DhKm:p:Ss:" opt; do
 		;;
 	S) UNSET_PREFER_BINPKG_DEPS=1;;
 	s) export XBPS_SRCDISTDIR="$OPTARG";;
+	V) echo $XBPS_SRC_BUILD_VERSION && exit 0;;
 	--) shift; break;;
 	esac
 done