#!/bin/sh

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

[ -n "$push_username" ] || exit 102
[ -n "$push_password" ] || exit 103
[ -n "$push_repo" ] || exit 104

rollback() {
  EXIT="$?"
  if [ -n "$BASETIP" ]; then
    echo "Script failed for these heads"
    hg heads
    echo "Script failed with exitcode $EXIT rolling back to $BASETIP"
    hg update -C
    hg --config extensions.mq= strip -n "$BASETIP"
    hg pull -r "$BASETIP"
  else
    echo "No rollback, exitcode $EXIT"
  fi
}

BASETIP=`hg log -r . --template '{node}'`
trap rollback EXIT

hg pull -r default -u http://hg.netbeans.org/"$push_repo"

hg heads
HEADS=`hg heads --template "{branches}\n" | grep "^$" | wc -l`
if [ $HEADS = 2 ]; then
    echo "2 heads, Need to merge"
    hg --config ui.merge=internal:merge --config ui.interactive=1 merge < /dev/null || exit 8
    hg ci -u "$push_username"@netbeans.org -m "Automated merge with main-silver"
else
    if [ $HEADS -gt 2 ]; then
        echo "$HEADS heads, here is some diagnostic"
        hg heads
    fi
fi

TIP=`hg log -r . --template '{node}'`

if hg push -f -r $TIP https://"$push_username":"$push_password"@hg.netbeans.org/"$push_repo"; then
    echo Push OK.
else
    hg heads
    hg incoming -r default http://hg.netbeans.org/"$push_repo"
    echo Too many heads in default branch or there are some incoming changesets
    exit 9
fi
unset BASETIP
exit 0