package org.apache.maven.plugin.gpg;

 /*

  * 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.io.File;

 import java.io.IOException;

 import org.apache.maven.plugin.AbstractMojo;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.MojoFailureException;

 import org.apache.maven.project.MavenProject;

 /**

  * @author Benjamin Bentmann

  */

 public abstract class AbstractGpgMojo

     extends AbstractMojo

 {

     /**

      * The directory from which gpg will load keyrings. If not specified, gpg will use the value configured for its

      * installation, e.g. <code>~/.gnupg</code> or <code>%APPDATA%/gnupg</code>.

      * 

      * @parameter expression="${gpg.homedir}"

      * @since 1.0

      */

     private File homedir;

     /**

      * The passphrase to use when signing.

      * 

      * @parameter expression="${gpg.passphrase}"

      */

     private String passphrase;

     /**

      * The "name" of the key to sign with. Passed to gpg as <code>--local-user</code>.

      * 

      * @parameter expression="${gpg.keyname}"

      */

     private String keyname;

     /**

      * Passes <code>--use-agent</code> or <code>--no-use-agent</code> to gpg. If using an agent, the passphrase is

      * optional as the agent will provide it.

      * For gpg2, specify true as --no-use-agent was removed in gpg2 and doesn't ask for a passphrase anymore.

      * 

      * @parameter expression="${gpg.useagent}" default-value="false"

      */

     private boolean useAgent;

     /**

      * @parameter default-value="${settings.interactiveMode}"

      * @readonly

      */

     private boolean interactive;

     /**

      * The path to the GnuPG executable to use for artifact signing. Defaults to either "gpg" or "gpg.exe" depending on

      * the operating system.

      * 

      * @parameter expression="${gpg.executable}"

      * @since 1.1

      */

     private String executable;

     GpgSigner newSigner( MavenProject project )

         throws MojoExecutionException, MojoFailureException

     {

         GpgSigner signer = new GpgSigner();

         signer.setExecutable( executable );

         signer.setInteractive( interactive );

         signer.setKeyName( keyname );

         signer.setUseAgent( useAgent );

         signer.setHomeDirectory( homedir );

         signer.setPassPhrase( passphrase );

         if ( null == passphrase && !useAgent )

         {

             if ( !interactive )

             {

                 throw new MojoFailureException( "Cannot obtain passphrase in batch mode" );

             }

             try

             {

                 signer.setPassPhrase( signer.getPassphrase( project ) );

             }

             catch ( IOException e )

             {

                 throw new MojoExecutionException( "Exception reading passphrase", e );

             }

         }

         return signer;

     }

 }