org.ebaysf.ostara.upgrade.util.NexusUtils.java Source code

Introduction

Here is the source code for org.ebaysf.ostara.upgrade.util.NexusUtils.java

Source

/*******************************************************************************
 * Copyright (c) 2014 eBay 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.
 *******************************************************************************/
package org.ebaysf.ostara.upgrade.util;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Properties;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;

import org.apache.commons.io.IOUtils;
import org.apache.log4j.Logger;
import org.apache.maven.model.Dependency;
import org.apache.maven.model.Model;
import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
import org.ebaysf.ostara.upgrade.MigratorUtils;

public class NexusUtils {
    protected static final Logger LOG = Logger.getLogger(NexusUtils.class);

    public static String getUrl(String content, int pos) {
        int start = content.lastIndexOf("\"", pos);
        return content.substring(start + 1, pos + 4);
    }

    public static Model readPom(String pomUrl) {
        try {
            InputStream is = new URL(pomUrl).openStream();
            Model model = new MavenXpp3Reader().read(is);
            is.close();

            return model;
        } catch (Throwable th) {
            th.printStackTrace();

            return null;
        }
    }

    public static Properties extractBuildinfo(String repo, Dependency dep) {
        return extractBuildinfo(repo + MigratorUtils.buildArtifactUrl(dep, true, null));
    }

    public static Properties extractBuildinfo(String url) {
        try {
            String content = IOUtils.toString(new URL(url));
            int jarPos = content.indexOf(".pom\"");
            if (jarPos != -1) {
                String jarSuffix = ".jar\"";
                jarPos = 0;

                do {
                    jarPos = content.indexOf(jarSuffix, jarPos);
                    //TODO Any qualifier will mess up the scanning
                    final String SOURCES_JAR_FLAG = "-sources";
                    final String TESTS_JAR_FLAG = "-tests";

                    if (jarPos != -1 && content.substring(jarPos - SOURCES_JAR_FLAG.length(), jarPos)
                            .equals(SOURCES_JAR_FLAG)) {
                        jarPos = content.indexOf(jarSuffix, jarPos + jarSuffix.length() - 1);
                        continue;
                    }

                    if (jarPos != -1
                            && content.substring(jarPos - TESTS_JAR_FLAG.length(), jarPos).equals(TESTS_JAR_FLAG)) {
                        jarPos = content.indexOf(jarSuffix, jarPos + jarSuffix.length() - 1);
                        continue;
                    }

                    final String JAVADOC_JAR_FLAG = "-javadoc";

                    if (jarPos != -1 && jarPos > JAVADOC_JAR_FLAG.length() && content
                            .substring(jarPos - JAVADOC_JAR_FLAG.length(), jarPos).equals(JAVADOC_JAR_FLAG)) {
                        jarPos = content.indexOf(jarSuffix, jarPos + jarSuffix.length() - 1);
                        continue;
                    }

                    if (jarPos != -1) {
                        String jarUrl = getUrl(content, jarPos);

                        System.out.println("Identified JAR URL: " + jarUrl);

                        try (JarInputStream jis = new JarInputStream(new URL(jarUrl).openStream())) {
                            JarEntry je = null;

                            while ((je = jis.getNextJarEntry()) != null) {
                                if (je.getName().equals("buildinfo.properties")) {
                                    Properties props = new Properties();
                                    props.load(new ByteArrayInputStream(IOUtils.toByteArray(jis)));

                                    return props;
                                }
                            }
                        } catch (IOException e) {
                            System.err.println("Failed to read JAR file contents");
                            e.printStackTrace();
                        }
                    }

                    break;
                } while (jarPos != -1);
            }
        } catch (IOException e) {
            LOG.warn(e.getMessage());
        }

        return null;
    }

    public static String getGitUrl(Properties props) {
        return props.getProperty("git.url");
    }

    public static String getGitBranch(Properties props) {
        return props.getProperty("git.branch");
    }

    public static String getCommitter(Properties props) {
        return props.getProperty("git.commit.user.email");
    }
}