implement diff command for mercurial

scm-plugins/scm-hg-plugin/src/main/java/sonia/scm/repository/spi/HgDiffCommand.java

@@ -0,0 +1,105 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.repository.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.io.ByteStreams;
+import com.google.common.io.Closeables;
+
+import sonia.scm.repository.HgContext;
+import sonia.scm.repository.HgRepositoryHandler;
+import sonia.scm.repository.Repository;
+import sonia.scm.repository.RepositoryException;
+import sonia.scm.util.Util;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class HgDiffCommand extends AbstractHgCommand implements DiffCommand
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param handler
+   * @param context
+   * @param repository
+   * @param repositoryDirectory
+   */
+  public HgDiffCommand(HgRepositoryHandler handler, HgContext context,
+                       Repository repository, File repositoryDirectory)
+  {
+    super(handler, context, repository, repositoryDirectory);
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param output
+   *
+   * @throws IOException
+   * @throws RepositoryException
+   */
+  @Override
+  public void getDiffResult(DiffCommandRequest request, OutputStream output)
+          throws IOException, RepositoryException
+  {
+    Process p = createHgProcess("diff", "-c", request.getRevision(),
+                                Util.nonNull(request.getPath()));
+    InputStream input = null;
+
+    try
+    {
+      handleErrorStream(p.getErrorStream());
+      input = p.getInputStream();
+      ByteStreams.copy(input, output);
+    }
+    finally
+    {
+      Closeables.closeQuietly(input);
+    }
+  }
+}

scm-plugins/scm-hg-plugin/src/main/java/sonia/scm/repository/spi/HgRepositoryServiceProvider.java

@@ -56,7 +56,7 @@ public class HgRepositoryServiceProvider extends RepositoryServiceProvider
 
   /** Field description */
   private static final Set<Command> COMMANDS = ImmutableSet.of(Command.BROWSE,
-                                                 Command.CAT);
+                                                 Command.CAT, Command.DIFF);
 
   //~--- constructors ---------------------------------------------------------
 
@@ -107,6 +107,19 @@ public class HgRepositoryServiceProvider extends RepositoryServiceProvider
                             repositoryDirectory);
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public HgDiffCommand getDiffCommand()
+  {
+    return new HgDiffCommand(handler, hgContextProvider.get(), repository,
+                             repositoryDirectory);
+  }
+
   /**
    * Method description
    *