[pacman-dev] Add rsync vcs support to makepkg

[Mark Constable]

Plus a couple of other minor points. Qt daily snapshots are only
available via rsync (and tarballs) so I added _rsyncroot and
_rsyncmod awareness to makepkg.

elif [ ! -z ${_rsyncroot} ] && [ ! -z ${_rsyncmod} ] ; then               
    [ $(type -p rsync) ] || return 0                                  
    msg "$(gettext "Determining latest rsync revision...")"           
    newpkgver=$(date -u +%Y%m%d%H)                                    

The date format is per hour so multiple updates per day are possible
and the -u is UTC so the the timestamp is universal worldwide. Whilst
submitting a patch I thought I'd throw in this option for consideration
which is to use the pkgrel variable as the VCS version field rather
than pkgver.

if [ "$USE_PKGREL" != "" ]; then
    msg2 "$(gettext "Package release version found: %s")" "$newpkgver"
    pkgrel=$newpkgver
else
    msg2 "$(gettext "Version found: %s")" "$newpkgver"
    pkgver=$newpkgver
fi

It requires a new USE_PKGREL argument (see attached diff). It makes
it easier to offer packages called qt-snaphot-4.4.1-2008092301 and
qt-snaphot-4.5.0-2008092301

And finally, this minor tweak ensures that a pkgver=$(date) or
pkgver=$EXPORTED_GLOBAL_VAR will not be overwritten...

- sed -i "s/^pkgver=[^ ]*/pkgver=$newpkgver/" ./$BUILDSCRIPT
+ sed -i "s/^pkgver=[^\( |\$\)]*/pkgver=$newpkgver/" ./$BUILDSCRIPT

--markc
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