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Filename : gzip.preinst
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#!/bin/sh

set -e

# begin-remove-after: released:forky
if [ "$1" = upgrade ] || [ "$1" = install ]; then
	for tool in zcat zcmp zdiff zegrep zfgrep zgrep; do
		if [ "$(dpkg-divert --truename "/bin/$tool")" = "/bin/$tool.gzip" ] &&
			[ "$(dpkg-divert --listpackage "/bin/$tool")" = zutils ] &&
			[ "$(dpkg-divert --truename "/usr/bin/$tool")" = "/usr/bin/$tool" ]; then
			# A pre-/usr-move diversion is installed by zutils.
			echo "Mitigating diversion of /bin/$tool on behalf of zutils"
			dpkg-divert --no-rename --package zutils \
				--divert "/usr/bin/$tool.usr-is-merged" \
				--add "/usr/bin/$tool"
		fi
	done
fi
# end-remove-after