1 files changed, 59 insertions, 0 deletions
diff --git a/debian/zutils.preinst b/debian/zutils.preinst
new file mode 100755
index 0000000..3fa0faf
--- /dev/null
+++ b/debian/zutils.preinst
@@ -0,0 +1,59 @@
+#!/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/${FILE}")
+
+			if [ "${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 [ "${TRUENAME}" != "/usr/bin/${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 [ "${TRUENAME}" != "/bin/${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/${FILE}"
+					if [ -e "${DPKG_ROOT}${TRUENAME}" ] || [ -h "${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