#!/bin/bash -
# bugs-in-changelog.sh
# Copyright (C) 2009-2021 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

# Used when preparing the guestfs-release-notes(1) man page.  This
# script looks at the bugs noted in the git changelog since the last
# stable release (or any release).  To use it, the only parameter
# should be the git commit range, eg:
#
#   ./bugs-in-changelog.sh "v1.44.0.."

if [ -z "$1" ]; then
    echo "$0 git-commit-range"
    exit 1
fi

# Grep the log for Bugzilla IDs in various formats.
rhbzs="$( git log "$1" | egrep -o 'RHBZ#[0-9]+' | sed 's/RHBZ#//' )"
bzurls="$( git log "$1" | egrep -o 'https?://bugzilla.redhat[_./?=a-z0-9]*[/=][0-9]+\b' | sed 's/.*[/=]\([0-9]\+\)$/\1/' )"

# Uniq and format as comma-separated list of ids.
bugids=$( for b in $rhbzs $bzurls ; do echo $b; done | sort -u | tr '\n' ',' | sed 's/,$//' )

#echo bugids "$bugids"

# Filter out any bugs which may still be in NEW or ASSIGNED:
bugzilla query -b "$bugids" \
    -s MODIFIED,POST,ON_QA,PASSES_QA,VERIFIED,RELEASE_PENDING,CLOSED \
    --component libguestfs \
    --outputformat='%{bug_id} %{short_desc}' |
    sort -n -r |
    perl -pe '
        s{([0-9]+)\s+(.*)}{
        sprintf ("=item L<https://bugzilla.redhat.com/%s>\n\n%s\n",
                 $1, $2)
        }xe'