MergeMojo.java

package net.jhorstmann.i18n.mojo;

/*
 * Copyright 2001-2005 The Apache Software Foundation.
 *
 * 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.
 */

import org.apache.maven.plugin.MojoExecutionException;
import org.codehaus.plexus.util.DirectoryScanner;
import org.codehaus.plexus.util.cli.CommandLineException;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.Commandline;
import org.codehaus.plexus.util.cli.StreamConsumer;

import java.io.File;

/**
 * Invokes the msgmerge tool to update po files.
 * 
 * @author Tammo van Lessen
 * @author Jörn Horstmann
 * @goal merge
 * @phase generate-resources
 */
public class MergeMojo extends AbstractGettextMojo {

    /**
     * The msgmerge command.
     * 
     * @parameter expression="${msgmergeCmd}" default-value="msgmerge"
     * @required
     */
    protected String msgmergeCmd;

    public void execute() throws MojoExecutionException {
        getLog().info("Invoking " + msgmergeCmd + " for po files in '" + poDirectory.getAbsolutePath() + "'");

        DirectoryScanner ds = new DirectoryScanner();
        ds.setBasedir(poDirectory);
        ds.setIncludes(new String[] { "**/*.po" });
        ds.scan();
        String[] files = ds.getIncludedFiles();
        for (int i = 0; i < files.length; i++) {
            getLog().info("Processing " + files[i]);
            Commandline cl = new Commandline();
            cl.setExecutable(msgmergeCmd);
            cl.createArg().setValue("-q");
            cl.createArg().setValue("--backup=numbered");
            cl.createArg().setValue("-U");
            File poFile = new File(poDirectory, files[i]);
            cl.createArg().setFile(poFile);
            cl.createArg().setFile(keysFile);

            getLog().debug("Executing: " + cl.toString());
            StreamConsumer out = new LoggerStreamConsumer(getLog(), LoggerStreamConsumer.INFO);
            StreamConsumer err = new LoggerStreamConsumer(getLog(), LoggerStreamConsumer.WARN);
            try {
                CommandLineUtils.executeCommandLine(cl, out, err);
                if (poFile.exists() && buildContext != null) {
                    buildContext.refresh(poFile);
                }
            } catch (CommandLineException e) {
                throw new MojoExecutionException("Could not execute " + msgmergeCmd, e);
            }
        }
    }
}