Remove obsolete conffiles in preinst

2 files changed, 56 insertions, 0 deletions

diff --git a/debian/changelog b/debian/changelog
index bb9769c..3ebf25b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+vdr-plugin-webvideo (0.3.2-1) unstable; urgency=low
+
+  * Remove conffiles that have been obsolete since 0.2.0-1
+
+ -- Antti Ajanki <antti.ajanki@iki.fi>  Tue, 17 Aug 2010 19:46:49 +0300
+
 vdr-plugin-webvideo (0.3.1-1) unstable; urgency=low
 
   * Updated Italian translation (thanks to Diego Pierotto).
diff --git a/debian/preinst b/debian/preinst
new file mode 100644
index 0000000..93f4653
--- /dev/null
+++ b/debian/preinst
@@ -0,0 +1,50 @@
+#!/bin/sh
+# preinst script for vdr-plugin-webvideo
+#
+# see: dh_installdeb(1)
+
+set -e
+
+# Remove a no-longer used conffile
+rm_conffile() {
+    local PKGNAME="$1"
+    local CONFFILE="$2"
+
+    [ -e "$CONFFILE" ] || return 0
+
+    local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
+    local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
+            sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
+    if [ "$md5sum" != "$old_md5sum" ]; then
+        echo "Obsolete conffile $CONFFILE has been modified by you."
+        echo "Saving as $CONFFILE.dpkg-bak ..."
+        mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
+    else
+        echo "Removing obsolete conffile $CONFFILE ..."
+        rm -f "$CONFFILE"
+    fi
+}
+
+case "$1" in
+    install|upgrade)
+        if dpkg --compare-versions "$2" le 0.3.1-1; then
+	    rm_conffile vdr-plugin-webvideo "/etc/init.d/vdr-plugin-webvideo"
+            rm_conffile vdr-plugin-webvideo "/etc/default/vdr-plugin-webvideo"
+    	fi
+    ;;
+
+    abort-upgrade)
+    ;;   
+
+    *)
+        echo "preinst called with unknown argument \`$1'" >&2
+        exit 1
+    ;;
+esac
+
+# dh_installdeb will replace this with shell code automatically
+# generated by other debhelper scripts.
+
+#DEBHELPER#
+
+exit 0