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java_opts.go
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/
java_opts.go
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/*
* Copyright 2018-2020 the original author or authors.
*
* 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
*
* https://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.
*/
package helper
import (
"os"
"strings"
"github.com/paketo-buildpacks/libpak/bard"
)
type JavaOpts struct {
Logger bard.Logger
}
func (j JavaOpts) Execute() (map[string]string, error) {
jo, ok := os.LookupEnv("JAVA_OPTS")
if !ok {
return nil, nil
}
j.Logger.Info("Adding $JAVA_OPTS to $JAVA_TOOL_OPTIONS")
var values []string
if s, ok := os.LookupEnv("JAVA_TOOL_OPTIONS"); ok {
values = append(values, s)
}
values = append(values, jo)
return map[string]string{"JAVA_TOOL_OPTIONS": strings.Join(values, " ")}, nil
}