View Javadoc

1   package org.apache.maven.profiles;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.maven.profiles.io.xpp3.ProfilesXpp3Reader;
23  import org.codehaus.plexus.interpolation.EnvarBasedValueSource;
24  import org.codehaus.plexus.interpolation.RegexBasedInterpolator;
25  import org.codehaus.plexus.logging.AbstractLogEnabled;
26  import org.codehaus.plexus.util.IOUtil;
27  import org.codehaus.plexus.util.ReaderFactory;
28  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
29  
30  import java.io.File;
31  import java.io.IOException;
32  import java.io.Reader;
33  import java.io.StringReader;
34  import java.io.StringWriter;
35  
36  public class DefaultMavenProfilesBuilder
37      extends AbstractLogEnabled
38      implements MavenProfilesBuilder
39  {
40      private static final String PROFILES_XML_FILE = "profiles.xml";
41  
42      public ProfilesRoot buildProfiles( File basedir )
43          throws IOException, XmlPullParserException
44      {
45          File profilesXml = new File( basedir, PROFILES_XML_FILE );
46  
47          ProfilesRoot profilesRoot = null;
48  
49          if ( profilesXml.exists() )
50          {
51              ProfilesXpp3Reader reader = new ProfilesXpp3Reader();
52              Reader profileReader = null;
53              try
54              {
55                  profileReader = ReaderFactory.newXmlReader( profilesXml );
56  
57                  StringWriter sWriter = new StringWriter();
58  
59                  IOUtil.copy( profileReader, sWriter );
60  
61                  String rawInput = sWriter.toString();
62  
63                  try
64                  {
65                      RegexBasedInterpolator interpolator = new RegexBasedInterpolator();
66                      interpolator.addValueSource( new EnvarBasedValueSource() );
67  
68                      rawInput = interpolator.interpolate( rawInput, "settings" );
69                  }
70                  catch ( Exception e )
71                  {
72                      getLogger().warn( "Failed to initialize environment variable resolver. Skipping environment substitution in " + PROFILES_XML_FILE + "." );
73                      getLogger().debug( "Failed to initialize envar resolver. Skipping resolution.", e );
74                  }
75  
76                  StringReader sReader = new StringReader( rawInput );
77  
78                  profilesRoot = reader.read( sReader );
79              }
80              finally
81              {
82                  IOUtil.close( profileReader );
83              }
84          }
85  
86          return profilesRoot;
87      }
88  
89  }