From 032a65357240319f4cdb3fa204a4ab5e455dae29 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Mon, 17 Feb 2025 22:07:34 +0100
Subject: [PATCH] Adding alternative handling for /usr/bin/lzip.

Signed-off-by: Daniel Baumann <daniel@debian.org>
---
 debian/lunzip.postinst | 24 ++++++++++++++++++++++++
 debian/lunzip.prerm    | 22 ++++++++++++++++++++++
 debian/rules           |  7 +++++++
 3 files changed, 53 insertions(+)
 create mode 100644 debian/lunzip.postinst
 create mode 100644 debian/lunzip.prerm

diff --git a/debian/lunzip.postinst b/debian/lunzip.postinst
new file mode 100644
index 0000000..4ed0891
--- /dev/null
+++ b/debian/lunzip.postinst
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -e
+
+case "${1}" in
+	configure)
+		update-alternatives --quiet \
+			--install /usr/bin/lzip lzip /usr/bin/lzip.decompressor 10 \
+			--slave /usr/share/man/man1/lzip.1.gz lzip.1.gz /usr/share/man/man1/lzip.decompressor.1.gz
+		;;
+
+	abort-upgrade|abort-remove|abort-deconfigure)
+
+		;;
+
+	*)
+		echo "postinst called with unknown argument \`${1}'" >&2
+		exit 1
+		;;
+esac
+
+#DEBHELPER#
+
+exit 0
diff --git a/debian/lunzip.prerm b/debian/lunzip.prerm
new file mode 100644
index 0000000..e731041
--- /dev/null
+++ b/debian/lunzip.prerm
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+case "${1}" in
+	remove|upgrade|deconfigure)
+		update-alternatives --quiet --remove lzip /usr/bin/lzip.decompressor
+		;;
+
+	failed-upgrade)
+
+		;;
+
+	*)
+		echo "prerm called with unknown argument \`${1}'" >&2
+		exit 1
+		;;
+esac
+
+#DEBHELPER#
+
+exit 0
diff --git a/debian/rules b/debian/rules
index 58f4350..66d4e2d 100755
--- a/debian/rules
+++ b/debian/rules
@@ -6,6 +6,13 @@
 override_dh_auto_install:
 	dh_auto_install -- DESTDIR=$(CURDIR)/debian/lunzip
 
+	# alernative handling
+	mv debian/lunzip/usr/bin/lunzip debian/lunzip/usr/bin/lzip.decompressor
+	mv debian/lunzip/usr/share/man/man1/lunzip.1 debian/lunzip/usr/share/man/man1/lzip.decompressor.1
+
+	ln -s /usr/bin/lzip.decompressor debian/lunzip/usr/bin/lunzip
+	ln -s /usr/share/man/man1/lzip.decompressor.1.gz debian/lunzip/usr/share/man/man1/lunzip.1.gz
+
 override_dh_builddeb:
 	dh_builddeb -- -Zxz