| #!/bin/bash |
| # 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. |
| |
| ####################################### |
| # A utility script to search for java. The order in which we look for java |
| # goes from most specific to least specific, i.e. |
| # ${DRUID_JAVA_HOME} |
| # ${JAVA_HOME} |
| # ${PATH} |
| # Arguments: |
| # None |
| # Returns: |
| # The bin folder of java if it exists, otherwise an empty string |
| ####################################### |
| get_java_bin_dir() { |
| if [ ! -z "${DRUID_JAVA_HOME-}" ]; then |
| printf "$DRUID_JAVA_HOME/bin" |
| elif [ ! -z "${JAVA_HOME-}" ]; then |
| printf "$JAVA_HOME/bin" |
| elif [ ! -z "$(command -v java)" ]; then |
| # Strip /java from the location of where java is installed |
| JAVA_ON_PATH="$(command -v java)" |
| printf "${JAVA_ON_PATH%/java}" |
| else |
| printf "" |
| fi |
| } |