org.eclipse.hudson.maven.plugins.hpi.HpiUtil.java Source code

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Here is the source code for org.eclipse.hudson.maven.plugins.hpi.HpiUtil.java

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/*******************************************************************************
 *
 * Copyright (c) 2004-2009 Oracle Corporation.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: 
 *
 *    Kohsuke Kawaguchi  
 *
 *******************************************************************************/

package org.eclipse.hudson.maven.plugins.hpi;

import java.io.IOException;
import java.util.Collection;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.plugin.logging.Log;
//import org.kohsuke.stapler.framework.io.IOException2;

/**
 * @author Kohsuke Kawaguchi
 */
class HpiUtil {

    private static final String HUDSON_CORE_GROUP_ID = "org.eclipse.hudson";
    private static final String HUDSON_CORE_ARTIFACT_ID = "hudson-core";

    private static final String[] HUDSON_PLUGIN_HEADERS = { "Plugin-Class", "Plugin-Version" };

    static boolean isPlugin(Artifact artifact) throws IOException {
        try {
            // some artifacts aren't even Java, so ignore those.
            if (!artifact.getType().equals("jar"))
                return false;

            // this can happened with maven 3 and doesn't have any side effect here
            if (artifact.getFile() == null)
                return false;
            // could a reactor member in member (mvn test-compile with core :-) )
            if (artifact.getFile().isDirectory())
                return false;

            JarFile jar = new JarFile(artifact.getFile());
            try {
                Manifest manifest = jar.getManifest();
                if (manifest == null)
                    return false;
                for (String key : HUDSON_PLUGIN_HEADERS) {
                    if (manifest.getMainAttributes().getValue(key) != null)
                        return true;
                }
                return false;
            } finally {
                jar.close();
            }
        } catch (IOException e) {
            throw new IOException("Failed to open artifact " + artifact.toString() + " at " + artifact.getFile(),
                    e);
        }
    }

    static String findHudsonVersion(Collection<Artifact> artifacts, Log log) {
        for (Artifact a : artifacts) {
            if ((HUDSON_CORE_GROUP_ID.equals(a.getGroupId()))
                    && HUDSON_CORE_ARTIFACT_ID.equals(a.getArtifactId())) {
                log.info("Targeting Hudson-Version: " + a.getVersion());
                return a.getVersion();
            }
        }
        log.warn("Cannot determine Hudson-Version from project dependencies");
        return null;
    }
}