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#!/bin/sh

[ -f 'PKGBUILD?h=packages%2Femacs' ] &&  rm 'PKGBUILD?h=packages%2Femacs'
[ -f 'emacs.install?h=packages%2Femacs' ] &&  rm 'emacs.install?h=packages%2Femacs'

wget 'https://projects.archlinux.org/svntogit/packages.git/plain/trunk/PKGBUILD?h=packages/emacs' >/dev/null 2>/dev/null
wget 'https://projects.archlinux.org/svntogit/packages.git/plain/trunk/emacs.install?h=packages/emacs' >/dev/null 2>/dev/null

mv 'PKGBUILD?h=packages%2Femacs' PKGBUILD.upstream.new
mv 'emacs.install?h=packages%2Femacs' emacs.install.upstream.new

if [ $? = 0 ]; then
	[ -f unfetchable ] && rm unfetchable
	grep ^pkg < PKGBUILD.upstream.new | md5sum > new-sum
	touch sum
	if [ "$(cat sum)" = "$(cat new-sum)" ]; then
		rm new-sum
	else
		mv new-sum sum
		diff PKGBUILD.upstream.{old,new} > PKGBUILD.upstream.diff
		diff emacs.install.upstream.{old,new} > emacs.install.upstream.diff
		mv PKGBUILD.upstream.{new,old}
		mv emacs.install.upstream.{new,old}
		echo 'emacs-gtk2'
	fi
elif [ ! -f unfetchable ]; then
	touch unfetchable
	echo 'emacs-gtk2 (unfetchable)'
fi