install alternatives for vim

vim-alternatives.sh

#!/bin/sh
set -e

pkg=vim
mandir=/usr/share/man
bindir=/usr/local/bin
priority=30

update-alternatives --install /usr/bin/vim vim $bindir/vim $priority
update-alternatives --install /usr/bin/vimdiff vimdiff $bindir/vim $priority
update-alternatives --install /usr/bin/rvim rvim $bindir/vim $priority
update-alternatives --install /usr/bin/rview rview $bindir/vim $priority

for i in vi view ex editor ; do
	update-alternatives \
		--install /usr/bin/$i $i $bindir/vim $priority \
		--slave $mandir/man1/$i.1.gz $i.1.gz $mandir/man1/vim.1.gz
done

exit 0