Add idea projects to .gitignore, add build properties to jar, and log…

… build's git revision once upon static load.

.gitignore

@@ -20,3 +20,6 @@
 .svn
 build/
 bin/
+*.ipr
+*.iml
+*.iws

build.xml

@@ -89,7 +89,7 @@
 
   <property name="make.cmd" value="make"/>
 
-  <!-- IVY properteis set here -->
+  <!-- IVY properties set here -->
   <property name="ivy.dir" location="ivy" />
   <loadproperties srcfile="${ivy.dir}/libraries.properties"/>
   <property name="ivy.jar" location="${ivy.dir}/ivy-${ivy.version}.jar"/>
@@ -176,6 +176,33 @@
     <mkdir dir="${test.build.classes}"/>
   </target>
 
+  <!-- ====================================================== -->
+  <!-- Build properties file                                  -->
+  <!-- ====================================================== -->
+  <target name="buildinfo">
+    <tstamp>
+      <format property="build_time" pattern="MM/dd/yyyy hh:mm aa" timezone="GMT"/>
+    </tstamp>
+    <exec executable="git" outputproperty="build_revision">
+      <arg value="rev-parse"/>
+      <arg value="HEAD"/>
+    </exec>
+    <exec executable="whoami" outputproperty="build_author"/>
+    <exec executable="uname" outputproperty="build_os">
+      <arg value="-a"/>
+    </exec>
+
+    <propertyfile file="${build.classes}/build.properties"
+        comment="This file is automatically generated - DO NOT EDIT">
+      <entry key="build_time" value="${build_time}"/>
+      <entry key="build_revision" value="${build_revision}"/>
+      <entry key="build_author" value="${build_author}"/>
+      <entry key="build_version" value="${version}"/>
+      <entry key="build_os" value="${build_os}"/>
+    </propertyfile>
+  </target>
+
+
   <!-- ====================================================== -->
   <!-- Compile the Java files                                 -->
   <!-- ====================================================== -->
@@ -243,7 +270,7 @@
   <!-- ================================================================== -->
   <!--                                                                    -->
   <!-- ================================================================== -->
-  <target name="jar" depends="compile-java" description="Make jar">
+  <target name="jar" depends="compile-java, buildinfo" description="Make jar">
     <jar jarfile="${build.dir}/${final.name}.jar"
          basedir="${build.classes}">
       <manifest>

src/java/com/hadoop/compression/lzo/LzoCodec.java

@@ -15,12 +15,13 @@
  * along with Hadoop-Gpl-Compression.  If not, see
  * <http://www.gnu.org/licenses/>.
  */
- 
+
 package com.hadoop.compression.lzo;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.Properties;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -38,10 +39,9 @@
  * A {@link org.apache.hadoop.io.compress.CompressionCodec} for a streaming
  * <b>lzo</b> compression/decompression pair.
  * http://www.oberhumer.com/opensource/lzo/
- * 
+ *
  */
 public class LzoCodec implements Configurable, CompressionCodec {
-
   private static final Log LOG = LogFactory.getLog(LzoCodec.class.getName());
 
   private Configuration conf;
@@ -62,7 +62,7 @@ public Configuration getConf() {
       LzoDecompressor.isNativeLzoLoaded();
 
       if (nativeLzoLoaded) {
-        LOG.info("Successfully loaded & initialized native-lzo library");
+        LOG.info("Successfully loaded & initialized native-lzo library [hadoop-lzo rev " + getRevisionHash() + "]");
       } else {
         LOG.error("Failed to load/initialize native-lzo library");
       }
@@ -73,7 +73,7 @@ public Configuration getConf() {
 
   /**
    * Check if native-lzo library is loaded & initialized.
-   * 
+   *
    * @param conf configuration
    * @return <code>true</code> if native-lzo library is loaded & initialized;
    *         else <code>false</code>
@@ -82,12 +82,23 @@ public static boolean isNativeLzoLoaded(Configuration conf) {
     return nativeLzoLoaded && conf.getBoolean("hadoop.native.lib", true);
   }
 
-  public CompressionOutputStream createOutputStream(OutputStream out) 
+  public static String getRevisionHash() {
+    try {
+      Properties p = new Properties();
+      p.load(LzoCodec.class.getResourceAsStream("/build.properties"));
+      return p.getProperty("build_revision");
+    } catch (IOException e) {
+      LOG.error("Could not find build properties file with revision hash");
+      return "UNKNOWN";
+    }
+  }
+
+  public CompressionOutputStream createOutputStream(OutputStream out)
   throws IOException {
     return createOutputStream(out, createCompressor());
   }
 
-  public CompressionOutputStream createOutputStream(OutputStream out, 
+  public CompressionOutputStream createOutputStream(OutputStream out,
       Compressor compressor) throws IOException {
     // Ensure native-lzo library is loaded & initialized
     if (!isNativeLzoLoaded(conf)) {
@@ -102,20 +113,20 @@ public CompressionOutputStream createOutputStream(OutputStream out,
      * LZO will expand incompressible data by a little amount.
      * I still haven't computed the exact values, but I suggest using
      * these formulas for a worst-case expansion calculation:
-     * 
+     *
      * Algorithm LZO1, LZO1A, LZO1B, LZO1C, LZO1F, LZO1X, LZO1Y, LZO1Z:
      * ----------------------------------------------------------------
      * output_block_size = input_block_size + (input_block_size / 16) + 64 + 3
-     * 
+     *
      * This is about 106% for a large block size.
-     * 
+     *
      * Algorithm LZO2A:
      * ----------------
      * output_block_size = input_block_size + (input_block_size / 8) + 128 + 3
      */
 
     // Create the lzo output-stream
-    LzoCompressor.CompressionStrategy strategy = 
+    LzoCompressor.CompressionStrategy strategy =
       LzoCompressor.CompressionStrategy.valueOf(
           conf.get("io.compression.codec.lzo.compressor",
               LzoCompressor.CompressionStrategy.LZO1X_1.name()));
@@ -143,7 +154,7 @@ public Compressor createCompressor() {
       throw new RuntimeException("native-lzo library not available");
     }
 
-    LzoCompressor.CompressionStrategy strategy = 
+    LzoCompressor.CompressionStrategy strategy =
       LzoCompressor.CompressionStrategy.valueOf(
           conf.get("io.compression.codec.lzo.compressor",
               LzoCompressor.CompressionStrategy.LZO1X_1.name()));
@@ -158,14 +169,14 @@ public CompressionInputStream createInputStream(InputStream in)
     return createInputStream(in, createDecompressor());
   }
 
-  public CompressionInputStream createInputStream(InputStream in, 
-      Decompressor decompressor) 
+  public CompressionInputStream createInputStream(InputStream in,
+      Decompressor decompressor)
   throws IOException {
     // Ensure native-lzo library is loaded & initialized
     if (!isNativeLzoLoaded(conf)) {
       throw new RuntimeException("native-lzo library not available");
     }
-    return new BlockDecompressorStream(in, decompressor, 
+    return new BlockDecompressorStream(in, decompressor,
         conf.getInt("io.compression.codec.lzo.buffersize", 64*1024));
   }
 
@@ -183,14 +194,14 @@ public Decompressor createDecompressor() {
       throw new RuntimeException("native-lzo library not available");
     }
 
-    LzoDecompressor.CompressionStrategy strategy = 
+    LzoDecompressor.CompressionStrategy strategy =
       LzoDecompressor.CompressionStrategy.valueOf(
           conf.get("io.compression.codec.lzo.decompressor",
               LzoDecompressor.CompressionStrategy.LZO1X.name()));
     int bufferSize =
       conf.getInt("io.compression.codec.lzo.buffersize", 64*1024);
 
-    return new LzoDecompressor(strategy, bufferSize); 
+    return new LzoDecompressor(strategy, bufferSize);
   }
 
   /**