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package org.apache.maven.properties.internal;
/*
* 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.
*/
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import org.codehaus.plexus.util.Os;
/**
* Assists the project builder. <strong>Warning:</strong> This is an internal utility class that is only public for
* technical reasons, it is not part of the public API. In particular, this class can be changed or deleted without
* prior notice.
*
* @since 3.0
* @author Benjamin Bentmann
*/
public class EnvironmentUtils
{
private static Properties envVars;
/**
* Adds the environment variables in the form of properties whose keys are prefixed with {@code env.}, e.g. {@code
* env.PATH}. Unlike native environment variables, properties are always case-sensitive. For the sake of
* determinism, the environment variable names will be normalized to upper case on platforms with case-insensitive
* variable lookup.
*
* @param props The properties to add the environment variables to, may be {@code null}.
*/
public static void addEnvVars( Properties props )
{
if ( props != null )
{
if ( envVars == null )
{
Properties tmp = new Properties();
boolean caseSensitive = !Os.isFamily( Os.FAMILY_WINDOWS );
for ( Map.Entry<String, String> entry : System.getenv().entrySet() )
{
String key =
"env." + ( caseSensitive ? entry.getKey() : entry.getKey().toUpperCase( Locale.ENGLISH ) );
tmp.setProperty( key, entry.getValue() );
}
envVars = tmp;
}
props.putAll( envVars );
}
}
}
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