From 584102cfb3b2fa765388edebd77526b5e4ecbc66 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Thu, 10 Mar 2011 20:35:00 +0000
Subject: Add a backport script

git-svn-id: svn+ssh://asteria.noreply.org/svn/weaselutils/trunk@471 bc3d92e2-beff-0310-a7cd-cc87d7ac0ede
---
 backport | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100755 backport

diff --git a/backport b/backport
new file mode 100755
index 0000000..50a9fe0
--- /dev/null
+++ b/backport
@@ -0,0 +1,115 @@
+#!/bin/bash
+
+# Copyright 2011 Peter Palfrader
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+set -u
+set -e
+
+get_bp_info() {
+	local target="$1"; shift
+	local key="$1"; shift
+
+	local result=$(awk '$1 == "'"$target"'" {print}' << 'EOF'
+#arg		versiontag	#tilde	changelogdist
+sarge		sarge		5
+etch		etch		4
+lenny		lenny		3
+squeeze		squeeze		2
+wheezy		wheezy		1
+
+sarge-bpo	bpo31		1	sarge-backports
+etch-bpo	bpo40		1	etch-backports
+lenny-bpo	bpo50		1	lenny-backports
+squeeze-bpo	bpo60		1	squeeze-backports
+
+dapper		dapper		1
+edgy		edgy		1
+feisty		feisty		1
+gutsy		gutsy		1
+hardy		hardy		1
+intrepid	intrepid	1
+jaunty		jaunty		1
+karmic		karmic		1
+lucid		lucid		1
+maverick	maverick	1
+EOF
+)
+	if [ -z "$result" ] ; then
+		echo >&2 "Do not now about target '$target'."
+		exit 1
+	fi
+	set "nothing" $result
+	shift
+	if [ "$#" != "3" ] && [ "$#" != "4" ]; then
+		echo >&2 "Bad result line for '$target': '$result'."
+		exit 1
+	fi
+	shift
+	case "$key" in
+		versiontag) echo "$1" ;;
+		tilde) echo "$2" ;;
+		changelogdist) echo "${3:-}" ;;
+		*)
+			echo >&2 "Invalid key '$key'"
+			exit 1
+	esac
+	return 0
+}
+
+if [ "$#" != "1" ]; then
+	echo >&2 "Usage: $0 <backporttarget>"
+	exit 1
+fi
+
+target="$1"
+
+versiontag=$(get_bp_info "$target" versiontag)
+tildenum=$(get_bp_info "$target" tilde)
+tildes=""
+while [ "$tildenum" -gt 0 ]; do
+	tildes="$tildes~"
+	tildenum=$((tildenum-1))
+done
+cldist=$(get_bp_info "$target" changelogdist)
+
+
+currentdist=$(dpkg-parsechangelog | grep-dctrl -n -s Distribution '')
+if [ -z "$currentdist" ]; then
+	echo >&2 "Cannot figure out current distribution"
+	exit 1
+fi
+currentver=$(dpkg-parsechangelog | grep-dctrl -n -s Version '')
+#currentupstream="${currentver%-*}"
+#currentdebian="${currentver##*-}"
+newver="$currentver$tildes$versiontag+1"
+if [ -z "$cldist" ]; then
+	if [ "$currentdist" = "experimental" ]; then
+		cldist="experimental-$target-backport"
+	else
+		cldist="$target-backport"
+	fi
+fi
+
+dch \
+	--newversion "$newver" --allow-lower-version \
+	--distribution "$cldist" --force-distribution \
+	"Build for $cldist."
-- 
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