[Portland] DESTDIR support for xdg-utils

[Stefan Schweizer]

Hi,

I noticed that xdg-utils does noes not support the DESTDIR environment
viarable that allows to tell it to only install in one directory.

I worked around that with some simple sed calls in the googleearth
ebuild, but I noticed that it does not work with current xdg-utils,
first let me explained how I hacked googleearth:

	# make the postinst scripts behave
	sed -i -e 's:$SETUP_INSTALLPATH/::' -e "s: --user: --system:" \
		-e 's:$SETUP_INSTALLPATH:1:' postinstall.sh
	sed -i -e "s:/usr:${D}/usr:g" -e "s:^detectDE$::" \
		-e 's:-x $x/update-mime:-d nonexis:' \
		-e 's:-x $x/update-desktop:-d nonexis:' linux/xdg/xdg-m{ime,enu}
http://sources.gentoo.org/viewcvs.py/*checkout*/gentoo-x86/x11-misc/googleearth/googleearth-4_beta.ebuild

--system tells the googleearth xdg to install systemwide.
 "s:/usr:${D}/usr:g"  - $D = DESTDIR the directory that gets merged to / later
's:-x $x/update-mime:-d nonexis:' - tell it not to call update-mime
(that would write global and violate the sandbox that Gentoo has in
place)

The problem with xdg-utils is that it does not have the
--user|--system setting and it does not allow to specify a DESTDIR.
Also it does not allow to omit update-mime-database

What I propose is to care for the DESTDIR env var. And install in
system ($DESTDIR/usr/share..) when it is non-empty as well as omit
update-mime.

Does that make sense - would you want me to make a patch for it?

Regards,
Stefan