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#!/bin/sh
# Fetch Package changelog for given source or binary package. Send it through
# a pager if stdout is a terminal.
# (C) 2010 Canonical Ltd
# Author: Martin Pitt <martin.pitt@ubuntu.com>
set -e
# evaluate and check CLI argumens
pkg="$1"
if [ -z "$1" -o -n "$3" ]; then
echo "Usage: $0 <package_name> [ <version> | candidate ]" >&2
exit 1
fi
version="$2"
# do we want the log for the currently installed version?
if [ -z "$version" ]; then
if ! dpkgs=`dpkg -s $pkg 2>/dev/null`; then
echo "ERROR: Package $pkg is not installed; try 'candidate' version for uninstalled packages" >&2
exit 1
fi
version=`echo "$dpkgs" | grep ^Version`
fi
# turn binary package names into source
if src=`apt-cache show $pkg 2>/dev/null| grep ^Source:`; then
pkg=${src#Source: }
fi
# get version and directory
if ! showsrc=`apt-cache showsrc $pkg 2>/dev/null` || [ -z "$showsrc" ] ; then
echo "ERROR: Source or binary package $pkg does not exist" >&2
exit 1
fi
if [ "$version" = "candidate" ]; then
version=`echo "$showsrc"| grep -m 1 ^Version:`
fi
# strip off tag name and epoch
version=${version#Version: }
version=${version#*:}
dir=`echo "$showsrc"| grep ^Directory:`
dir=${dir#Directory: }
# fetch it
OUT=`mktemp -t "${pkg}.changes.XXXXXX"`
trap "rm $OUT" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
if ! wget -q -O- http://changelogs.ubuntu.com/changelogs/$dir/${pkg}_${version}/changelog > "$OUT"
then
echo "ERROR: changelog for this version is not (yet) available; try https://launchpad.net/ubuntu/+source/$pkg/+changelog" >&2
exit 1
fi
sensible-pager "$OUT"
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