Update the webupdate.wrapper to match the running

version:

 - Don't assume or hard-code PORTSDIR is in /usr.
 - Set PINDEX_OVERRIDE based on the running OSVERSION.
 - Fetch the ports/INDEX file if ENOENT.
 - Group all exported variables together.

Sponsored by:	The FreeBSD Foundation

share/tools/webupdate.wrapper

@@ -12,20 +12,22 @@ SVNROOT=svn://svn.FreeBSD.org
 PUBDIR=/usr/local/www/www.freebsd.org
 DESTDIR="${PUBDIR}-clean"
 RSYNC_FLAGS="-avH"
-PINDEX_OVERRIDE=/usr/ports/INDEX-9
 GEN_INDEX=yes
-export USER=www-data
-export PATH DESTDIR PINDEX_OVERRIDE GEN_INDEX PUBDIR
-
 WEBMAILTO=freebsd-doc@FreeBSD.org
-export WEBMAILTO
-
 FLAGDIR=/usr/local/www/build
-
-# We always build these - they are fast
+: ${PORTSDIR:=/usr/local/www/ports}; export PORTSDIR
+: ${INDEXNUM:=$(make -C ${PORTSDIR} -V OSREL)}
+: ${PINDEX_OVERRIDE:=${PORTSDIR}/INDEX-${INDEXNUM%%.*}}
+export USER=www-data
+export PATH DESTDIR PINDEX_OVERRIDE GEN_INDEX PUBDIR PORTSDIR
+export WEBMAILTO
 export WITH_PORTS_GROWTH=YES
 export WITH_PRSTATS=YES
 
+if [ ! -e "${PINDEX_OVERRIDE}" ]; then
+	make -C ${PORTSDIR} fetchindex
+fi
+
 # Flags are ordered by more extensive to less
 if [ -e $FLAGDIR/fullbuild-clean.flag ]; then
 	export BUILD_RELNOTES=YES