James E. Blair 266aa44260 Make the merge in gerrit-git-prep like gerrit.
Fixes bug 981040.

Change-Id: I89960b76f1ae6e5be6b2f5fc4695f00a7c90452a
2012-06-19 15:28:36 -07:00

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#!/bin/bash -e
# Needed environment variables:
# GERRIT_PROJECT
# GERRIT_BRANCH
# GERRIT_REFSPEC or GERRIT_NEWREV or GERRIT_CHANGES
#
# GERRIT_CHANGES format:
# GERRIT_CHANGES="gtest-org/test:master:refs/changes/20/420/1^gtest-org/test:master:refs/changes/21/421/1"
# GERRIT_CHANGES="gtest-org/test:master:refs/changes/21/421/1"
# GERRIT_CHANGES=""
SITE=$1
if [ -z "$SITE" ]
then
echo "The site name (eg 'review.openstack.org') must be the first argument."
exit 1
fi
if [ -z "$GERRIT_NEWREV" ] && [ -z "$GERRIT_REFSPEC" ] && [ -z "$GERRIT_CHANGES" ]
then
echo "This job may only be triggered by Gerrit."
exit 1
fi
if [ ! -z "$GERRIT_CHANGES" ]
then
CHANGE_NUMBER=`echo $GERRIT_CHANGES|grep -Po ".*/\K\d+(?=/\d+)"`
echo "Triggered by: https://$SITE/$CHANGE_NUMBER"
fi
if [ ! -z "$GERRIT_REFSPEC" ]
then
CHANGE_NUMBER=`echo $GERRIT_REFSPEC|grep -Po ".*/\K\d+(?=/\d+)"`
echo "Triggered by: https://$SITE/$CHANGE_NUMBER"
fi
function merge_change {
PROJECT=$1
REFSPEC=$2
git fetch https://$SITE/p/$PROJECT $REFSPEC
# This should be equivalent to what gerrit does if a repo is
# set to "merge commits when necessary" and "automatically resolve
# conflicts" is set to true:
git merge -s resolve FETCH_HEAD
}
function merge_changes {
set +x
OIFS=$IFS
IFS='^'
for change in $GERRIT_CHANGES
do
OIFS2=$IFS
IFS=':'
change_array=($change)
IFS=$OIFS2
CHANGE_PROJECT=${change_array[0]}
CHANGE_BRANCH=${change_array[1]}
CHANGE_REFSPEC=${change_array[2]}
if [ "$CHANGE_PROJECT" = "$GERRIT_PROJECT" ] &&
[ "$CHANGE_BRANCH" = "$GERRIT_BRANCH" ]; then
set -x
merge_change $CHANGE_PROJECT $CHANGE_REFSPEC
set +x
fi
done
IFS=$OIFS
set -x
}
set -x
if [[ ! -e .git ]]
then
git clone https://$SITE/p/$GERRIT_PROJECT .
fi
git remote update || git remote update # attempt to work around bug #925790
git reset --hard
git clean -x -f -d -q
if [ -z "$GERRIT_NEWREV" ]
then
git checkout $GERRIT_BRANCH
git reset --hard remotes/origin/$GERRIT_BRANCH
git clean -x -f -d -q
if [ ! -z "$GERRIT_REFSPEC" ]
then
merge_change $GERRIT_PROJECT $GERRIT_REFSPEC
else
merge_changes
fi
else
git checkout $GERRIT_NEWREV
git reset --hard $GERRIT_NEWREV
git clean -x -f -d -q
fi