cmdline/apt-changelog

   1 #!/bin/sh
   2 # Fetch Package changelog for given source or binary package. Send it through
   3 # a pager if stdout is a terminal.
   4 # (C) 2010 Canonical Ltd
   5 # Author: Martin Pitt <martin.pitt@ubuntu.com>
   6
   7 set -e
   8
   9 # evaluate and check CLI argumens
  10 pkg="$1"
  11
  12 if [ -z "$1" -o -n "$3" ]; then
  13     echo "Usage: $0 <package_name> [ <version> | candidate ]" >&2
  14     exit 1
  15 fi
  16
  17 version="$2"
  18
  19 # do we want the log for the currently installed version?
  20 if [ -z "$version" ]; then
  21     if ! dpkgs=`dpkg -s $pkg 2>/dev/null`; then
  22         echo "ERROR: Package $pkg is not installed; try 'candidate' version for uninstalled packages" >&2
  23         exit 1
  24     fi
  25     version=`echo "$dpkgs" | grep ^Version`
  26 fi
  27
  28 # turn binary package names into source
  29 if src=`apt-cache show $pkg 2>/dev/null| grep ^Source:`; then
  30     pkg=${src#Source: }
  31 fi
  32
  33 # get version and directory
  34 if ! showsrc=`apt-cache showsrc $pkg 2>/dev/null` || [ -z "$showsrc" ] ; then
  35     echo "ERROR: Source or binary package $pkg does not exist" >&2
  36     exit 1
  37 fi
  38
  39 if [ "$version" = "candidate" ]; then
  40     version=`echo "$showsrc"| grep -m 1 ^Version:`
  41 fi
  42
  43 # strip off tag name and epoch
  44 version=${version#Version: }
  45 version=${version#*:}
  46
  47 dir=`echo "$showsrc"| grep ^Directory:`
  48 dir=${dir#Directory: }
  49
  50 # fetch it
  51 OUT=`mktemp -t "${pkg}.changes.XXXXXX"`
  52 trap "rm $OUT" 0 HUP INT QUIT ILL ABRT FPE SEGV PIPE TERM
  53 if ! wget -q -O- http://changelogs.ubuntu.com/changelogs/$dir/${pkg}_${version}/changelog > "$OUT"
  54 then
  55     echo "ERROR: changelog for this version is not (yet) available; try https://launchpad.net/ubuntu/+source/$pkg/+changelog" >&2
  56     exit 1
  57 fi
  58 sensible-pager "$OUT"
  59