ln_to_sdkman

#!/bin/bash -e
#
# 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.
#


JAVA_HOME_BASE=/Library/Java/JavaVirtualMachines
JAVA6_HOME=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk
SDKMAN_CANDIDATES_JAVA_DIR=~/.sdkman/candidates/java
VERSION_PREFIX=_

mkdir -p $SDKMAN_CANDIDATES_JAVA_DIR

# Delete all previous created links
find $SDKMAN_CANDIDATES_JAVA_DIR -name "${VERSION_PREFIX}*" -depth 1 | xargs rm

# Create links of Java 7-8
for jdk in $(ls $JAVA_HOME_BASE)
do
    base_dir=$JAVA_HOME_BASE/$jdk
    [ ! -d $base_dir ] && continue
    [ -L $base_dir ] && continue

    # They're not under a management of sdkman. So the version name is tweaked a little.
    version_name=$(echo $jdk | sed -E "s/^jdk1.|\.jdk$//g" | sed -e "s/.0//" | sed -e "s/_/u/")
    version_name="${VERSION_PREFIX}${version_name}"

    ln -s $base_dir/Contents/Home $SDKMAN_CANDIDATES_JAVA_DIR/$version_name
    echo "Linked $base_dir/Contents/Home -> $SDKMAN_CANDIDATES_JAVA_DIR/$version_name"
done

# Create link of Java 6
if [ -d $JAVA6_HOME ]; then
    version_name="${VERSION_PREFIX}6"
    ln -s $JAVA6_HOME/Contents/Home $SDKMAN_CANDIDATES_JAVA_DIR/$version_name
    echo "Linked $base_dir/Contents/Home -> $SDKMAN_CANDIDATES_JAVA_DIR/$version_name"
fi

echo "Done."