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#!/bin/bash
# (C) 2013-2014 see Authors.txt
#
# This file is part of MPC-HC.
#
# MPC-HC 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 3 of the License, or
# (at your option) any later version.
#
# MPC-HC 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, see <http://www.gnu.org/licenses/>.
OPTIND=1
fullhash=0
log=0
show_help() {
echo "Syntax: $0 [options] <rev>"
echo "Options:"
echo " -f show full hash instead of abbreviation"
echo " -h show this help"
echo " -l show the log associated with the hash"
}
while getopts "hfl" opt; do
case "$opt" in
h)
show_help
exit 0
;;
f)
fullhash=1
;;
l)
log=1
;;
\?)
echo "Invalid option: -$OPTARG" >&2
show_help >&2
exit 1
;;
esac
done
shift $((OPTIND-1))
[[ "$1" == "--" ]] && shift
rev="$1"
(( rev > 0 )) || { show_help >&2; exit 1; }
# This is the last svn changeset, the number and hash can be automatically
# calculated, but it is slow to do that. So it is better to have it hardcoded.
svnrev=5597
svnhash="f669833b77e6515dc5f0a682c5bf665f9a81b2ec"
# If the git command isn't available or we are not inside a git repo exit the script
git rev-parse --git-dir > /dev/null 2>&1 || exit 1
# If this revision is after the switch to git
if ((rev > svnrev)); then
# Calculate how many changesets we need to traverse from the svnrev to HEAD
n=$((rev - svnrev))
# List the changes from svnhash..HEAD in reverse order and pick the ${n}th
hash=$(git rev-list --reverse $svnhash..HEAD | sed -n "${n}p")
else
# Get the hash by parsing the git-svn-id
# --all is needed in case the given ref is not part of trunk/master but in a tag / svn branch
hash=$(git log --all -1 --format="%H" --grep="git-svn-id: .*@${rev} ")
fi
[[ $fullhash == 0 ]] && hash="${hash:0:7}"
if (($log)); then
git log -1 $hash
else
echo "$hash"
fi
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