#!/bin/ash

# Copyright (C) 2024 The Android Open Source Project
#
# Licensed 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.

usage() {
    me=`basename "$0"`
    echo >&2 "Usage: $me [--help] [--output OUTPUT]"
    exit 1
}

while test $# -gt 0 ; do
  case "$1" in
  --help)
    usage
    ;;

  --output)
    shift
    OUTPUT=$1
    shift
    ;;

  *)
    break
  esac
done

INDEX_TYPE="LUCENE"
INDEX_MODULE="$(git config --file /var/gerrit/etc/gerrit.config gerrit.installIndexModule | tr '[:upper:]' '[:lower:]')"
if [ "$INDEX_MODULE" = "elasticsearch" ]; then
  INDEX_TYPE="ELASTICSEARCH"
fi

JAVA_OPTIONS=$(git config --file /var/gerrit/etc/gerrit.config --get-all container.javaOptions)
java ${JAVA_OPTIONS} -jar /var/gerrit/bin/gerrit.war reindex \
  -d /var/gerrit \
  --read-only-disk-caches

if [ "$INDEX_TYPE" = "LUCENE" ] && test -n "$OUTPUT"; then
  INDEXES=$(java -jar /var/gerrit/bin/gerrit.war reindex -d /var/gerrit --list)
  for INDEX in $INDEXES; do
    LATEST_INDEX=$(
      cd /var/gerrit/index && \
      find . -type d -name "${INDEX}_*" | \
      sort | \
      tail -n1
    )
    LATEST_INDEX=${LATEST_INDEX#"./"}
    SHARED_INDEX_TARGET=$OUTPUT/$LATEST_INDEX
    echo "Pruning $SHARED_INDEX_TARGET"
    rm -rf $SHARED_INDEX_TARGET
    echo "Copying $LATEST_INDEX to $SHARED_INDEX_TARGET"
    cp -R /var/gerrit/index/$LATEST_INDEX $SHARED_INDEX_TARGET
  done
fi