Hi,

I wrote a mechanism of update package for bsd.pkg.mk.
this is trial code, and don't acually do.

For example,
	% cd /usr/pkgsrc/graphics/jpeg
	% make update
	/usr/pkgsrc/x11/gnome-core deinstall
	/usr/pkgsrc/x11/gnome-libs deinstall
	/usr/pkgsrc/graphics/imlib deinstall
	/usr/pkgsrc/graphics/netpbm deinstall
	/usr/pkgsrc/x11/kde deinstall
	/usr/pkgsrc/misc/kdeutils deinstall
	/usr/pkgsrc/net/kdenetwork deinstall
	/usr/pkgsrc/graphics/kdegraphics deinstall
	/usr/pkgsrc/games/kdegames deinstall
	/usr/pkgsrc/x11/kdebase deinstall
	/usr/pkgsrc/x11/kdelibs deinstall
	/usr/pkgsrc/graphics/gimp deinstall
	/usr/pkgsrc/graphics/tiff deinstall
	/usr/pkgsrc/graphics/py-imaging deinstall
	/usr/pkgsrc/graphics/jpeg deinstall
	/usr/pkgsrc/graphics/jpeg install
	/usr/pkgsrc/graphics/py-imaging install
	/usr/pkgsrc/graphics/tiff install
	/usr/pkgsrc/graphics/gimp install
	/usr/pkgsrc/x11/kdelibs install
	/usr/pkgsrc/x11/kdebase install
	/usr/pkgsrc/games/kdegames install
	/usr/pkgsrc/graphics/kdegraphics install
	/usr/pkgsrc/net/kdenetwork install
	/usr/pkgsrc/misc/kdeutils install
	/usr/pkgsrc/x11/kde install
	/usr/pkgsrc/graphics/netpbm install
	/usr/pkgsrc/graphics/imlib install
	/usr/pkgsrc/x11/gnome-libs install
	/usr/pkgsrc/x11/gnome-core install

Kazuki Sakamoto

--
.if !target(update)
update:
	${_PKG_SILENT}${_PKG_DEBUG} \
	if [ "${FROM}" = "" ]; then \
		${RM} -f /tmp/.pkg_update;	\
		${TOUCH} /tmp/.pkg_update;	\
	fi;	\
	found="`${PKG_INFO} -e \"${PKGNAME:C/-[^-]*$/-[0-9]*/}\" || ${TRUE}`"; \
	if [ "$$found" != "" ]; then					\
		required="`${PKG_INFO} -R \"$$found\"|${AWK} '{if (i > 0){print $1} if(/Required by:/){i++}}'|${TR} '\\n' ' '`"; \
			if [ "$$required" != "" ]; then			\
				for pkg in $$required; do		\
					dir="`${PKG_INFO} -b \"$$pkg\"|${GREP} Makefile|head -n 1|${AWK} -F/ '{print \"../../\"$$1\"/\"$$2}'`"; 	\
					if [ -d $$dir ] ; then 		\
						(cd $$dir; ${MAKE} update FROM=${.CURDIR}); \
					fi;				\
				done;					\
			fi;						\
	fi;	\
	cleaned="`${GREP} \"${.CURDIR}\" /tmp/.pkg_update || ${TRUE}`"; \
	if [ "$$cleaned" = "" ]; then	\
		${ECHO} "${.CURDIR}" >> /tmp/.pkg_update; \
		${ECHO} "${.CURDIR} deinstall";	\
	fi; \
	if [ "${FROM}" = "" ]; then \
		reinstpkg="`${TAIL} -r /tmp/.pkg_update|${TR} '\\n' ' '`"; \
		for dir in $$reinstpkg; do	\
			(cd $$dir; ${ECHO} $$dir install);	\
		done;					\
	fi;
.endif