zutils/debian/zutils.preinst

#!/bin/sh

set -e

# DEP17 M18: Duplicate diversion in aliased location /bin.

case "${1}" in
	install)
		for FILE in zcat zcmp zdiff zegrep zfgrep zgrep
		do
			dpkg-divert --package zutils --quiet --add --rename --divert "/usr/bin/$FILE.gzip" "/usr/bin/$FILE"
			dpkg-divert --package zutils --quiet --add --rename --divert "/bin/$FILE.gzip.usr-is-merged" "/bin/$FILE"
			dpkg-divert --package zutils --quiet --add --rename --divert /usr/share/man/man1/${FILE}.gzip.1.gz /usr/share/man/man1/${FILE}.1.gz
		done
		;;

	upgrade)
		for FILE in zcat zcmp zdiff zegrep zfgrep zgrep
		do
			TRUENAME=$(dpkg-divert --truename "/usr/bin/$FILE")
			if test "$TRUENAME" = "/usr/bin/$FILE.usr-is-merged"; then
				# gzip.preinst duplicated the diversion for us
				dpkg-divert --package zutils --quiet --remove --no-rename --divert "/usr/bin/$FILE.usr-is-merged" "/usr/bin/$FILE"
				dpkg-divert --package zutils --quiet --remove --no-rename "/bin/$FILE"
				dpkg-divert --package zutils --quiet --add --no-rename --divert "/usr/bin/$FILE.gzip" "/usr/bin/$FILE"
				dpkg-divert --package zutils --quiet --add --no-rename --divert "/bin/$FILE.gzip.usr-is-merged" "/bin/$FILE"
			elif test "$TRUENAME" != "/usr/bin/$FILE.gzip"; then
				dpkg-divert --package zutils --quiet --add --no-rename --divert "/usr/bin/$FILE.gzip" "/usr/bin/$FILE"
				TRUENAME=$(dpkg-divert --truename "/bin/$FILE")
				if test "$TRUENAME" != "/bin/$FILE.gzip.usr-is-merged"; then
					dpkg-divert --package zutils --quiet --remove --no-rename "/bin/$FILE"
					dpkg-divert --package zutils --quiet --add --no-rename --divert "/bin/$FILE.gzip.usr-is-merged" "/bin/$FILE"
					if test -e "$DPKG_ROOT$TRUENAME" -o -h "$DPKG_ROOT$TRUENAME"; then
						mv "$DPKG_ROOT$TRUENAME" "$DPKG_ROOT/bin/$FILE.gzip.usr-is-merged"
					fi
				fi
			fi
		done
		;;
	abort-upgrade)

		;;

	*)
		echo "preinst called with unknown argument \`${1}'" >&2
		exit 1
		;;
esac

#DEBHELPER#

exit 0