HADOOP-8924. Add maven plugin alternative to shell script to save package-info.java. Contributed by Alejandro Abdelnur and Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1435380 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/dev-support/saveVersion.sh

@@ -1,67 +0,0 @@
-#!/bin/sh
-
-# 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.
-
-
-# This file is used to generate the package-info.java class that
-# records the version, revision, branch, user, timestamp, and url
-unset LANG
-unset LC_CTYPE
-unset LC_TIME
-version=$1
-build_dir=$2
-user=`whoami | tr '\n\r' '\n'`
-date=`date`
-cwd=`pwd`
-if git rev-parse HEAD 2>/dev/null > /dev/null ; then
-  revision=`git log -1 --pretty=format:"%H"`
-  hostname=`hostname`
-  branch=`git branch | sed -n -e 's/^* //p'`
-  url="git://${hostname}${cwd}"
-elif [ -d .svn ]; then
-  revision=`svn info | sed -n -e 's/Last Changed Rev: \(.*\)/\1/p'`
-  url=`svn info | sed -n -e 's/^URL: \(.*\)/\1/p'`
-  # Get canonical branch (branches/X, tags/X, or trunk)
-  branch=`echo $url | sed -n -e 's,.*\(branches/.*\)$,\1,p' \
-                             -e 's,.*\(tags/.*\)$,\1,p' \
-                             -e 's,.*trunk$,trunk,p'`
-else
-  revision="Unknown"
-  branch="Unknown"
-  url="file://$cwd"
-fi
-
-which md5sum > /dev/null
-if [ "$?" = "0" ] ; then
-  srcChecksum=`find src/main/java -name '*.java' | LC_ALL=C sort | xargs md5sum | md5sum | cut -d ' ' -f 1`
-else
-  srcChecksum="Not Available"
-fi
-
-mkdir -p $build_dir/org/apache/hadoop
-cat << EOF | \
-  sed -e "s/VERSION/$version/" -e "s/USER/$user/" -e "s/DATE/$date/" \
-      -e "s|URL|$url|" -e "s/REV/$revision/" \
-      -e "s|BRANCH|$branch|" -e "s/SRCCHECKSUM/$srcChecksum/" \
-      > $build_dir/org/apache/hadoop/package-info.java
-/*
- * Generated by src/saveVersion.sh
- */
-@HadoopVersionAnnotation(version="VERSION", revision="REV", branch="BRANCH",
-                         user="USER", date="DATE", url="URL",
-                         srcChecksum="SRCCHECKSUM")
-package org.apache.hadoop;
-EOF

hadoop-common-project/hadoop-common/pom.xml

@@ -244,7 +244,51 @@
   </dependencies>
 
   <build>
+    <!--
+    Include all files in src/main/resources.  By default, do not apply property
+    substitution (filtering=false), but do apply property substitution to
+    common-version-info.properties (filtering=true).  This will substitute the
+    version information correctly, but prevent Maven from altering other files
+    like core-default.xml.
+    -->
+    <resources>
+      <resource>
+        <directory>${basedir}/src/main/resources</directory>
+        <excludes>
+          <exclude>common-version-info.properties</exclude>
+        </excludes>
+        <filtering>false</filtering>
+      </resource>
+      <resource>
+        <directory>${basedir}/src/main/resources</directory>
+        <includes>
+          <include>common-version-info.properties</include>
+        </includes>
+        <filtering>true</filtering>
+      </resource>
+    </resources>
     <plugins>
+      <plugin>
+        <groupId>org.apache.hadoop</groupId>
+        <artifactId>hadoop-maven-plugins</artifactId>
+        <executions>
+          <execution>
+            <id>version-info</id>
+            <goals>
+              <goal>version-info</goal>
+            </goals>
+            <configuration>
+              <source>
+                <directory>${basedir}/src/main</directory>
+                <includes>
+                  <include>java/**/*.java</include>
+                  <include>proto/**/*.proto</include>
+                </includes>
+              </source>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
@@ -288,22 +332,6 @@
               </target>
             </configuration>
           </execution>
-          <execution>
-            <id>save-version</id>
-            <phase>generate-sources</phase>
-            <goals>
-              <goal>run</goal>
-            </goals>
-            <configuration>
-              <target>
-                <mkdir dir="${project.build.directory}/generated-sources/java"/>
-                <exec executable="sh">
-                  <arg
-                      line="${basedir}/dev-support/saveVersion.sh ${project.version} ${project.build.directory}/generated-sources/java"/>
-                </exec>
-              </target>
-            </configuration>
-          </execution>
           <execution>
             <id>generate-test-sources</id>
             <phase>generate-test-sources</phase>

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/HadoopVersionAnnotation.java

@@ -1,74 +0,0 @@
-/*
- * 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.
- */
-package org.apache.hadoop;
-
-import java.lang.annotation.*;
-
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-
-/**
- * A package attribute that captures the version of Hadoop that was compiled.
- */
-@Retention(RetentionPolicy.RUNTIME)
-@Target(ElementType.PACKAGE)
-@InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
-@InterfaceStability.Unstable
-public @interface HadoopVersionAnnotation {
- 
-  /**
-   * Get the Hadoop version
-   * @return the version string "0.6.3-dev"
-   */
-  String version();
-  
-  /**
-   * Get the username that compiled Hadoop.
-   */
-  String user();
-  
-  /**
-   * Get the date when Hadoop was compiled.
-   * @return the date in unix 'date' format
-   */
-  String date();
-    
-  /**
-   * Get the url for the subversion repository.
-   */
-  String url();
-  
-  /**
-   * Get the subversion revision.
-   * @return the revision number as a string (eg. "451451")
-   */
-  String revision();
-
-  /**
-   * Get the branch from which this was compiled.
-   * @return The branch name, e.g. "trunk" or "branches/branch-0.20"
-   */
-  String branch();
-
-  /**
-   * Get a checksum of the source files from which
-   * Hadoop was compiled.
-   * @return a string that uniquely identifies the source
-   **/
-  String srcChecksum();    
-}

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/VersionInfo.java

@@ -20,41 +20,78 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.HadoopVersionAnnotation;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
 /**
- * This class finds the package info for Hadoop and the HadoopVersionAnnotation
+ * This class returns build information about Hadoop components.
- * information.
  */
 @InterfaceAudience.Private
 @InterfaceStability.Unstable
 public class VersionInfo {
   private static final Log LOG = LogFactory.getLog(VersionInfo.class);
 
-  private static Package myPackage;
+  private Properties info;
-  private static HadoopVersionAnnotation version;
+
-  
+  protected VersionInfo(String component) {
-  static {
+    info = new Properties();
-    myPackage = HadoopVersionAnnotation.class.getPackage();
+    String versionInfoFile = component + "-version-info.properties";
-    version = myPackage.getAnnotation(HadoopVersionAnnotation.class);
+    try {
+      InputStream is = Thread.currentThread().getContextClassLoader()
+        .getResourceAsStream(versionInfoFile);
+      info.load(is);
+    } catch (IOException ex) {
+      LogFactory.getLog(getClass()).warn("Could not read '" + 
+        versionInfoFile + "', " + ex.toString(), ex);
+    }
   }
 
-  /**
+  protected String _getVersion() {
-   * Get the meta-data for the Hadoop package.
+    return info.getProperty("version", "Unknown");
-   * @return
-   */
-  static Package getPackage() {
-    return myPackage;
   }
-  
+
+  protected String _getRevision() {
+    return info.getProperty("revision", "Unknown");
+  }
+
+  protected String _getBranch() {
+    return info.getProperty("branch", "Unknown");
+  }
+
+  protected String _getDate() {
+    return info.getProperty("date", "Unknown");
+  }
+
+  protected String _getUser() {
+    return info.getProperty("user", "Unknown");
+  }
+
+  protected String _getUrl() {
+    return info.getProperty("url", "Unknown");
+  }
+
+  protected String _getSrcChecksum() {
+    return info.getProperty("srcChecksum", "Unknown");
+  }
+
+  protected String _getBuildVersion(){
+    return getVersion() +
+      " from " + _getRevision() +
+      " by " + _getUser() +
+      " source checksum " + _getSrcChecksum();
+  }
+
+  private static VersionInfo COMMON_VERSION_INFO = new VersionInfo("common");
   /**
    * Get the Hadoop version.
    * @return the Hadoop version string, eg. "0.6.3-dev"
    */
   public static String getVersion() {
-    return version != null ? version.version() : "Unknown";
+    return COMMON_VERSION_INFO._getVersion();
   }
   
   /**
@@ -62,7 +99,7 @@ public static String getVersion() {
    * @return the revision number, eg. "451451"
    */
   public static String getRevision() {
-    return version != null ? version.revision() : "Unknown";
+    return COMMON_VERSION_INFO._getRevision();
   }
 
   /**
@@ -70,7 +107,7 @@ public static String getRevision() {
    * @return The branch name, e.g. "trunk" or "branches/branch-0.20"
    */
   public static String getBranch() {
-    return version != null ? version.branch() : "Unknown";
+    return COMMON_VERSION_INFO._getBranch();
   }
 
   /**
@@ -78,7 +115,7 @@ public static String getBranch() {
    * @return the compilation date in unix date format
    */
   public static String getDate() {
-    return version != null ? version.date() : "Unknown";
+    return COMMON_VERSION_INFO._getDate();
   }
   
   /**
@@ -86,14 +123,14 @@ public static String getDate() {
    * @return the username of the user
    */
   public static String getUser() {
-    return version != null ? version.user() : "Unknown";
+    return COMMON_VERSION_INFO._getUser();
   }
   
   /**
    * Get the subversion URL for the root Hadoop directory.
    */
   public static String getUrl() {
-    return version != null ? version.url() : "Unknown";
+    return COMMON_VERSION_INFO._getUrl();
   }
 
   /**
@@ -101,7 +138,7 @@ public static String getUrl() {
    * built.
    **/
   public static String getSrcChecksum() {
-    return version != null ? version.srcChecksum() : "Unknown";
+    return COMMON_VERSION_INFO._getSrcChecksum();
   }
 
   /**
@@ -109,14 +146,11 @@ public static String getSrcChecksum() {
    * revision, user and date. 
    */
   public static String getBuildVersion(){
-    return VersionInfo.getVersion() + 
+    return COMMON_VERSION_INFO._getBuildVersion();
-    " from " + VersionInfo.getRevision() +
-    " by " + VersionInfo.getUser() + 
-    " source checksum " + VersionInfo.getSrcChecksum();
   }
   
   public static void main(String[] args) {
-    LOG.debug("version: "+ version);
+    LOG.debug("version: "+ getVersion());
     System.out.println("Hadoop " + getVersion());
     System.out.println("Subversion " + getUrl() + " -r " + getRevision());
     System.out.println("Compiled by " + getUser() + " on " + getDate());

hadoop-common-project/hadoop-common/src/main/resources/common-version-info.properties

@@ -0,0 +1,25 @@
+#
+# 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.
+#
+
+version=${pom.version}
+revision=${version-info.scm.commit}
+branch=${version-info.scm.branch}
+user=${user.name}
+date=${version-info.build.time}
+url=${version-info.scm.uri}
+srcChecksum=${version-info.source.md5}

hadoop-maven-plugins/pom.xml

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  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. See accompanying LICENSE file.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.hadoop</groupId>
+    <artifactId>hadoop-project</artifactId>
+    <version>3.0.0-SNAPSHOT</version>
+    <relativePath>../hadoop-project</relativePath>
+  </parent>
+  <groupId>org.apache.hadoop</groupId>
+  <artifactId>hadoop-maven-plugins</artifactId>
+  <packaging>maven-plugin</packaging>
+  <name>Apache Hadoop Maven Plugins</name>
+  <properties>
+    <maven.dependency.version>3.0</maven.dependency.version>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-plugin-api</artifactId>
+      <version>${maven.dependency.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-core</artifactId>
+      <version>${maven.dependency.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugin-tools</groupId>
+      <artifactId>maven-plugin-annotations</artifactId>
+      <version>${maven.dependency.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-plugin-plugin</artifactId>
+        <version>${maven.dependency.version}</version>
+        <configuration>
+          <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
+        </configuration>
+        <executions>
+          <execution>
+            <id>mojo-descriptor</id>
+            <goals>
+              <goal>descriptor</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/util/Exec.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2012 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.
+ */
+package org.apache.hadoop.maven.plugin.util;
+
+import org.apache.maven.plugin.Mojo;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Exec is a helper class for executing an external process from a mojo.
+ */
+public class Exec {
+  private Mojo mojo;
+
+  /**
+   * Creates a new Exec instance for executing an external process from the given
+   * mojo.
+   * 
+   * @param mojo Mojo executing external process
+   */
+  public Exec(Mojo mojo) {
+    this.mojo = mojo;
+  }
+
+  /**
+   * Runs the specified command and saves each line of the command's output to
+   * the given list.
+   * 
+   * @param command List<String> containing command and all arguments
+   * @param output List<String> in/out parameter to receive command output
+   * @return int exit code of command
+   */
+  public int run(List<String> command, List<String> output) {
+    int retCode = 1;
+    ProcessBuilder pb = new ProcessBuilder(command);
+    try {
+      Process p = pb.start();
+      OutputBufferThread stdOut = new OutputBufferThread(p.getInputStream());
+      OutputBufferThread stdErr = new OutputBufferThread(p.getErrorStream());
+      stdOut.start();
+      stdErr.start();
+      retCode = p.waitFor();
+      if (retCode != 0) {
+        mojo.getLog().warn(command + " failed with error code " + retCode);
+        for (String s : stdErr.getOutput()) {
+          mojo.getLog().debug(s);
+        }
+      } else {
+        stdOut.join();
+        stdErr.join();
+        output.addAll(stdOut.getOutput());
+      }
+    } catch (Exception ex) {
+      mojo.getLog().warn(command + " failed: " + ex.toString());
+    }
+    return retCode;
+  }
+
+  /**
+   * OutputBufferThread is a background thread for consuming and storing output
+   * of the external process.
+   */
+  private static class OutputBufferThread extends Thread {
+    private List<String> output;
+    private BufferedReader reader;
+
+    /**
+     * Creates a new OutputBufferThread to consume the given InputStream.
+     * 
+     * @param is InputStream to consume
+     */
+    public OutputBufferThread(InputStream is) {
+      this.setDaemon(true);
+      output = new ArrayList<String>();
+      reader = new BufferedReader(new InputStreamReader(is));
+    }
+
+    @Override
+    public void run() {
+      try {
+        String line = reader.readLine();
+        while (line != null) {
+          output.add(line);
+          line = reader.readLine();
+        }
+      } catch (IOException ex) {
+        throw new RuntimeException("make failed with error code " + ex.toString());
+      }
+    }
+
+    /**
+     * Returns every line consumed from the input.
+     * 
+     * @return List<String> every line consumed from the input
+     */
+    public List<String> getOutput() {
+      return output;
+    }
+  }
+}

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/util/FileSetUtils.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2012 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.
+ */
+package org.apache.hadoop.maven.plugin.util;
+
+import org.apache.maven.model.FileSet;
+import org.codehaus.plexus.util.FileUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * FileSetUtils contains helper methods for mojo implementations that need to
+ * work with a Maven FileSet.
+ */
+public class FileSetUtils {
+
+  /**
+   * Returns a string containing every element of the given list, with each
+   * element separated by a comma.
+   * 
+   * @param list List of all elements
+   * @return String containing every element, comma-separated
+   */
+  private static String getCommaSeparatedList(List list) {
+    StringBuilder buffer = new StringBuilder();
+    String separator = "";
+    for (Object e : list) {
+      buffer.append(separator).append(e);
+      separator = ",";
+    }
+    return buffer.toString();
+  }
+
+  /**
+   * Converts a Maven FileSet to a list of File objects.
+   * 
+   * @param source FileSet to convert
+   * @return List<File> containing every element of the FileSet as a File
+   * @throws IOException if an I/O error occurs while trying to find the files
+   */
+  @SuppressWarnings("unchecked")
+  public static List<File> convertFileSetToFiles(FileSet source) throws IOException {
+    String includes = getCommaSeparatedList(source.getIncludes());
+    String excludes = getCommaSeparatedList(source.getExcludes());
+    return FileUtils.getFiles(new File(source.getDirectory()), includes, excludes);
+  }
+}

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/versioninfo/VersionInfoMojo.java

@@ -0,0 +1,343 @@
+/*
+ * Copyright 2012 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.
+ */
+package org.apache.hadoop.maven.plugin.versioninfo;
+
+import org.apache.hadoop.maven.plugin.util.Exec;
+import org.apache.hadoop.maven.plugin.util.FileSetUtils;
+import org.apache.maven.model.FileSet;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.project.MavenProject;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.List;
+import java.util.TimeZone;
+
+/**
+ * VersionInfoMojo calculates information about the current version of the
+ * codebase and exports the information as properties for further use in a Maven
+ * build.  The version information includes build time, SCM URI, SCM branch, SCM
+ * commit, and an MD5 checksum of the contents of the files in the codebase.
+ */
+@Mojo(name="version-info", defaultPhase=LifecyclePhase.INITIALIZE)
+public class VersionInfoMojo extends AbstractMojo {
+
+  @Parameter(defaultValue="${project}")
+  private MavenProject project;
+
+  @Parameter(required=true)
+  private FileSet source;
+
+  @Parameter(defaultValue="version-info.build.time")
+  private String buildTimeProperty;
+
+  @Parameter(defaultValue="version-info.source.md5")
+  private String md5Property;
+
+  @Parameter(defaultValue="version-info.scm.uri")
+  private String scmUriProperty;
+
+  @Parameter(defaultValue="version-info.scm.branch")
+  private String scmBranchProperty;
+
+  @Parameter(defaultValue="version-info.scm.commit")
+  private String scmCommitProperty;
+
+  @Parameter(defaultValue="git")
+  private String gitCommand;
+
+  @Parameter(defaultValue="svn")
+  private String svnCommand;
+
+  private enum SCM {NONE, SVN, GIT}
+
+  @Override
+  public void execute() throws MojoExecutionException {
+    try {
+      SCM scm = determineSCM();
+      project.getProperties().setProperty(buildTimeProperty, getBuildTime());
+      project.getProperties().setProperty(scmUriProperty, getSCMUri(scm));
+      project.getProperties().setProperty(scmBranchProperty, getSCMBranch(scm));
+      project.getProperties().setProperty(scmCommitProperty, getSCMCommit(scm));
+      project.getProperties().setProperty(md5Property, computeMD5());
+    } catch (Throwable ex) {
+      throw new MojoExecutionException(ex.toString(), ex);
+    }
+  }
+
+  /**
+   * Returns a string representing current build time.
+   * 
+   * @return String representing current build time
+   */
+  private String getBuildTime() {
+    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'");
+    dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+    return dateFormat.format(new Date());
+  }
+  private List<String> scmOut;
+
+  /**
+   * Determines which SCM is in use (Subversion, git, or none) and captures
+   * output of the SCM command for later parsing.
+   * 
+   * @return SCM in use for this build
+   * @throws Exception if any error occurs attempting to determine SCM
+   */
+  private SCM determineSCM() throws Exception {
+    Exec exec = new Exec(this);
+    SCM scm = SCM.NONE;
+    scmOut = new ArrayList<String>();
+    int ret = exec.run(Arrays.asList(svnCommand, "info"), scmOut);
+    if (ret == 0) {
+      scm = SCM.SVN;
+    } else {
+      ret = exec.run(Arrays.asList(gitCommand, "branch"), scmOut);
+      if (ret == 0) {
+        ret = exec.run(Arrays.asList(gitCommand, "remote", "-v"), scmOut);
+        if (ret != 0) {
+          scm = SCM.NONE;
+          scmOut = null;
+        } else {
+          ret = exec.run(Arrays.asList(gitCommand, "log", "-n", "1"), scmOut);
+          if (ret != 0) {
+            scm = SCM.NONE;
+            scmOut = null;
+          } else {
+            scm = SCM.GIT;
+          }
+        }
+      }
+    }
+    if (scmOut != null) {
+      getLog().debug(scmOut.toString());
+    }
+    getLog().info("SCM: " + scm);
+    return scm;
+  }
+
+  /**
+   * Return URI and branch of Subversion repository.
+   * 
+   * @param str String Subversion info output containing URI and branch
+   * @return String[] containing URI and branch
+   */
+  private String[] getSvnUriInfo(String str) {
+    String[] res = new String[]{"Unknown", "Unknown"};
+    try {
+      String path = str;
+      int index = path.indexOf("trunk");
+      if (index > -1) {
+        res[0] = path.substring(0, index - 1);
+        res[1] = "trunk";
+      } else {
+        index = path.indexOf("branches");
+        if (index > -1) {
+          res[0] = path.substring(0, index - 1);
+          int branchIndex = index + "branches".length() + 1;
+          index = path.indexOf("/", branchIndex);
+          if (index > -1) {
+            res[1] = path.substring(branchIndex, index);
+          } else {
+            res[1] = path.substring(branchIndex);
+          }
+        }
+      }
+    } catch (Exception ex) {
+      getLog().warn("Could not determine URI & branch from SVN URI: " + str);
+    }
+    return res;
+  }
+
+  /**
+   * Parses SCM output and returns URI of SCM.
+   * 
+   * @param scm SCM in use for this build
+   * @return String URI of SCM
+   */
+  private String getSCMUri(SCM scm) {
+    String uri = "Unknown";
+    switch (scm) {
+      case SVN:
+        for (String s : scmOut) {
+          if (s.startsWith("URL:")) {
+            uri = s.substring(4).trim();
+            uri = getSvnUriInfo(uri)[0];
+            break;
+          }
+        }
+        break;
+      case GIT:
+        for (String s : scmOut) {
+          if (s.startsWith("origin") && s.endsWith("(fetch)")) {
+            uri = s.substring("origin".length());
+            uri = uri.substring(0, uri.length() - "(fetch)".length());
+            break;
+          }
+        }
+        break;
+    }
+    return uri.trim();
+  }
+
+  /**
+   * Parses SCM output and returns commit of SCM.
+   * 
+   * @param scm SCM in use for this build
+   * @return String commit of SCM
+   */
+  private String getSCMCommit(SCM scm) {
+    String commit = "Unknown";
+    switch (scm) {
+      case SVN:
+        for (String s : scmOut) {
+          if (s.startsWith("Revision:")) {
+            commit = s.substring("Revision:".length());
+            break;
+          }
+        }
+        break;
+      case GIT:
+        for (String s : scmOut) {
+          if (s.startsWith("commit")) {
+            commit = s.substring("commit".length());
+            break;
+          }
+        }
+        break;
+    }
+    return commit.trim();
+  }
+
+  /**
+   * Parses SCM output and returns branch of SCM.
+   * 
+   * @param scm SCM in use for this build
+   * @return String branch of SCM
+   */
+  private String getSCMBranch(SCM scm) {
+    String branch = "Unknown";
+    switch (scm) {
+      case SVN:
+        for (String s : scmOut) {
+          if (s.startsWith("URL:")) {
+            branch = s.substring(4).trim();
+            branch = getSvnUriInfo(branch)[1];
+            break;
+          }
+        }
+        break;
+      case GIT:
+        for (String s : scmOut) {
+          if (s.startsWith("*")) {
+            branch = s.substring("*".length());
+            break;
+          }
+        }
+        break;
+    }
+    return branch.trim();
+  }
+
+  /**
+   * Reads and returns the full contents of the specified file.
+   * 
+   * @param file File to read
+   * @return byte[] containing full contents of file
+   * @throws IOException if there is an I/O error while reading the file
+   */
+  private byte[] readFile(File file) throws IOException {
+    RandomAccessFile raf = new RandomAccessFile(file, "r");
+    byte[] buffer = new byte[(int) raf.length()];
+    raf.readFully(buffer);
+    raf.close();
+    return buffer;
+  }
+
+  /**
+   * Given a list of files, computes and returns an MD5 checksum of the full
+   * contents of all files.
+   * 
+   * @param files List<File> containing every file to input into the MD5 checksum
+   * @return byte[] calculated MD5 checksum
+   * @throws IOException if there is an I/O error while reading a file
+   * @throws NoSuchAlgorithmException if the MD5 algorithm is not supported
+   */
+  private byte[] computeMD5(List<File> files) throws IOException, NoSuchAlgorithmException {
+    MessageDigest md5 = MessageDigest.getInstance("MD5");
+    for (File file : files) {
+      getLog().debug("Computing MD5 for: " + file);
+      md5.update(readFile(file));
+    }
+    return md5.digest();
+  }
+
+  /**
+   * Converts bytes to a hexadecimal string representation and returns it.
+   * 
+   * @param array byte[] to convert
+   * @return String containing hexadecimal representation of bytes
+   */
+  private String byteArrayToString(byte[] array) {
+    StringBuilder sb = new StringBuilder();
+    for (byte b : array) {
+      sb.append(Integer.toHexString(0xff & b));
+    }
+    return sb.toString();
+  }
+
+  /**
+   * Computes and returns an MD5 checksum of the contents of all files in the
+   * input Maven FileSet.
+   * 
+   * @return String containing hexadecimal representation of MD5 checksum
+   * @throws Exception if there is any error while computing the MD5 checksum
+   */
+  private String computeMD5() throws Exception {
+    List<File> files = FileSetUtils.convertFileSetToFiles(source);
+    // File order of MD5 calculation is significant.  Sorting is done on
+    // unix-format names, case-folded, in order to get a platform-independent
+    // sort and calculate the same MD5 on all platforms.
+    Collections.sort(files, new Comparator<File>() {
+      @Override
+      public int compare(File lhs, File rhs) {
+        return normalizePath(lhs).compareTo(normalizePath(rhs));
+      }
+
+      private String normalizePath(File file) {
+        return file.getPath().toUpperCase().replaceAll("\\\\", "/");
+      }
+    });
+    byte[] md5 = computeMD5(files);
+    String md5str = byteArrayToString(md5);
+    getLog().info("Computed MD5: " + md5str);
+    return md5str;
+  }
+}

hadoop-project/pom.xml

@@ -769,6 +769,11 @@
           <artifactId>maven-pdf-plugin</artifactId>
           <version>1.1</version>
         </plugin>
+        <plugin>
+          <groupId>org.apache.hadoop</groupId>
+          <artifactId>hadoop-maven-plugins</artifactId>
+          <version>${project.version}</version>
+        </plugin>
       </plugins>
     </pluginManagement>
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/pom.xml

@@ -45,6 +45,29 @@
   </dependencies>
 
   <build>
+    <!--
+    Include all files in src/main/resources.  By default, do not apply property
+    substitution (filtering=false), but do apply property substitution to
+    yarn-version-info.properties (filtering=true).  This will substitute the
+    version information correctly, but prevent Maven from altering other files
+    like yarn-default.xml.
+    -->
+    <resources>
+      <resource>
+        <directory>${basedir}/src/main/resources</directory>
+        <excludes>
+          <exclude>yarn-version-info.properties</exclude>
+        </excludes>
+        <filtering>false</filtering>
+      </resource>
+      <resource>
+        <directory>${basedir}/src/main/resources</directory>
+        <includes>
+          <include>yarn-version-info.properties</include>
+        </includes>
+        <filtering>true</filtering>
+      </resource>
+    </resources>
     <plugins>
      <plugin>
         <groupId>org.apache.rat</groupId>
@@ -64,6 +87,27 @@
           </excludes>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.hadoop</groupId>
+        <artifactId>hadoop-maven-plugins</artifactId>
+        <executions>
+          <execution>
+            <id>version-info</id>
+            <goals>
+              <goal>version-info</goal>
+            </goals>
+            <configuration>
+              <source>
+                <directory>${basedir}/src/main</directory>
+                <includes>
+                  <include>java/**/*.java</include>
+                  <include>proto/**/*.proto</include>
+                </includes>
+              </source>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <artifactId>maven-jar-plugin</artifactId>
         <executions>
@@ -127,20 +171,6 @@
               <goal>exec</goal>
             </goals>
           </execution>
-          <execution>
-            <id>generate-version</id>
-            <phase>generate-sources</phase>
-            <configuration>
-              <executable>scripts/saveVersion.sh</executable>
-              <arguments>
-                <argument>${project.version}</argument>
-                <argument>${project.build.directory}</argument>
-              </arguments>
-            </configuration>
-            <goals>
-              <goal>exec</goal>
-            </goals>
-          </execution>
         </executions>
       </plugin>
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/scripts/saveVersion.sh

@@ -1,62 +0,0 @@
-#!/bin/sh
-
-# 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.
-
-
-# This file is used to generate the package-info.java class that
-# records the version, revision, branch, user, timestamp, and url
-unset LANG
-unset LC_CTYPE
-unset LC_TIME
-version=$1
-build_dir=$2
-user=`whoami`
-date=`date`
-dir=`pwd`
-cwd=`dirname $dir`
-if git rev-parse HEAD 2>/dev/null > /dev/null ; then
-  revision=`git log -1 --pretty=format:"%H" ../`
-  hostname=`hostname`
-  branch=`git branch | sed -n -e 's/^* //p'`
-  url="git://${hostname}${cwd}"
-elif [ -d .svn ]; then
-  revision=`svn info ../ | sed -n -e 's/Last Changed Rev: \(.*\)/\1/p'`
-  url=`svn info ../ | sed -n -e 's/^URL: \(.*\)/\1/p'`
-  # Get canonical branch (branches/X, tags/X, or trunk)
-  branch=`echo $url | sed -n -e 's,.*\(branches/.*\)$,\1,p' \
-                             -e 's,.*\(tags/.*\)$,\1,p' \
-                             -e 's,.*trunk$,trunk,p'`
-else
-  revision="Unknown"
-  branch="Unknown"
-  url="file://$cwd"
-fi
-srcChecksum=`find ../ -name '*.java' | grep -v generated-sources | LC_ALL=C sort | xargs md5sum | md5sum | cut -d ' ' -f 1`
-
-mkdir -p $build_dir/generated-sources/version/org/apache/hadoop/yarn/
-cat << EOF | \
-  sed -e "s/VERSION/$version/" -e "s/USER/$user/" -e "s/DATE/$date/" \
-      -e "s|URL|$url|" -e "s/REV/$revision/" \
-      -e "s|BRANCH|$branch|" -e "s/SRCCHECKSUM/$srcChecksum/" \
-      > $build_dir/generated-sources/version/org/apache/hadoop/yarn/package-info.java
-/*
- * Generated by saveVersion.sh
- */
-@YarnVersionAnnotation(version="VERSION", revision="REV", branch="BRANCH",
-                         user="USER", date="DATE", url="URL",
-                         srcChecksum="SRCCHECKSUM")
-package org.apache.hadoop.yarn;
-EOF

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/YarnVersionInfo.java

@@ -20,7 +20,7 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.yarn.YarnVersionAnnotation;
+import org.apache.hadoop.util.VersionInfo;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 
@@ -30,31 +30,20 @@
  */
 @InterfaceAudience.Private
 @InterfaceStability.Unstable
-public class YarnVersionInfo {
+public class YarnVersionInfo extends VersionInfo {
   private static final Log LOG = LogFactory.getLog(YarnVersionInfo.class);
 
-  private static Package myPackage;
+  private static YarnVersionInfo YARN_VERSION_INFO = new YarnVersionInfo();
-  private static YarnVersionAnnotation version;
-  
-  static {
-    myPackage = YarnVersionAnnotation.class.getPackage();
-    version = myPackage.getAnnotation(YarnVersionAnnotation.class);
-  }
 
-  /**
+  protected YarnVersionInfo() {
-   * Get the meta-data for the Yarn package.
+    super("yarn");
-   * @return
-   */
-  static Package getPackage() {
-    return myPackage;
   }
-  
   /**
    * Get the Yarn version.
    * @return the Yarn version string, eg. "0.6.3-dev"
    */
   public static String getVersion() {
-    return version != null ? version.version() : "Unknown";
+    return YARN_VERSION_INFO._getVersion();
   }
   
   /**
@@ -62,7 +51,7 @@ public static String getVersion() {
    * @return the revision number, eg. "451451"
    */
   public static String getRevision() {
-    return version != null ? version.revision() : "Unknown";
+    return YARN_VERSION_INFO._getRevision();
   }
 
   /**
@@ -70,7 +59,7 @@ public static String getRevision() {
    * @return The branch name, e.g. "trunk" or "branches/branch-0.20"
    */
   public static String getBranch() {
-    return version != null ? version.branch() : "Unknown";
+    return YARN_VERSION_INFO._getBranch();
   }
 
   /**
@@ -78,7 +67,7 @@ public static String getBranch() {
    * @return the compilation date in unix date format
    */
   public static String getDate() {
-    return version != null ? version.date() : "Unknown";
+    return YARN_VERSION_INFO._getDate();
   }
   
   /**
@@ -86,14 +75,14 @@ public static String getDate() {
    * @return the username of the user
    */
   public static String getUser() {
-    return version != null ? version.user() : "Unknown";
+    return YARN_VERSION_INFO._getUser();
   }
   
   /**
    * Get the subversion URL for the root Yarn directory.
    */
   public static String getUrl() {
-    return version != null ? version.url() : "Unknown";
+    return YARN_VERSION_INFO._getUrl();
   }
 
   /**
@@ -101,7 +90,7 @@ public static String getUrl() {
    * built.
    **/
   public static String getSrcChecksum() {
-    return version != null ? version.srcChecksum() : "Unknown";
+    return YARN_VERSION_INFO._getSrcChecksum();
   }
 
   /**
@@ -109,14 +98,11 @@ public static String getSrcChecksum() {
    * revision, user and date. 
    */
   public static String getBuildVersion(){
-    return YarnVersionInfo.getVersion() + 
+    return YARN_VERSION_INFO._getBuildVersion();
-    " from " + YarnVersionInfo.getRevision() +
-    " by " + YarnVersionInfo.getUser() + 
-    " source checksum " + YarnVersionInfo.getSrcChecksum();
   }
   
   public static void main(String[] args) {
-    LOG.debug("version: "+ version);
+    LOG.debug("version: "+ getVersion());
     System.out.println("Yarn " + getVersion());
     System.out.println("Subversion " + getUrl() + " -r " + getRevision());
     System.out.println("Compiled by " + getUser() + " on " + getDate());

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-version-info.properties

@@ -0,0 +1,25 @@
+#
+# 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.
+#
+
+version=${pom.version}
+revision=${version-info.scm.commit}
+branch=${version-info.scm.branch}
+user=${user.name}
+date=${version-info.build.time}
+url=${version-info.scm.uri}
+srcChecksum=${version-info.source.md5}

pom.xml

@@ -87,6 +87,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
     <module>hadoop-project</module>
     <module>hadoop-project-dist</module>
     <module>hadoop-assemblies</module>
+    <module>hadoop-maven-plugins</module>
     <module>hadoop-common-project</module>
     <module>hadoop-hdfs-project</module>
     <module>hadoop-yarn-project</module>