Add "production" branch command

There already was a branch command for test purposes. This was adapted
for production use with git and hg.

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

@@ -0,0 +1,68 @@
+/**
+ * Copyright (c) 2014, 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;
+
+import com.aragost.javahg.Changeset;
+import com.aragost.javahg.commands.CommitCommand;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.repository.Branch;
+import sonia.scm.repository.Repository;
+
+/**
+ * Mercurial implementation of the {@link BranchCommand}.
+ * Note that this creates an empty commit to "persist" the new branch.
+ */
+public class HgBranchCommand extends AbstractCommand implements BranchCommand {
+
+  private static final Logger LOG = LoggerFactory.getLogger(HgBranchCommand.class);
+
+  HgBranchCommand(HgCommandContext context, Repository repository) {
+    super(context, repository);
+  }
+
+  @Override
+  public Branch branch(String name) {
+    com.aragost.javahg.Repository repository = open();
+    com.aragost.javahg.commands.BranchCommand.on(repository).set(name);
+
+    Changeset emptyChangeset = CommitCommand
+      .on(repository)
+      .user("SCM-Manager")
+      .message("Create new branch " + name)
+      .execute();
+
+    LOG.debug("Created new branch '{}' in repository {} with changeset {}",
+      name, getRepository().getNamespaceAndName(), emptyChangeset.getNode());
+
+    return Branch.normalBranch(name, emptyChangeset.getNode());
+  }
+}

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

@@ -126,6 +126,11 @@ public class HgRepositoryServiceProvider extends RepositoryServiceProvider
     return new HgBranchesCommand(context, repository);
   }
 
+  @Override
+  public BranchCommand getBranchCommand() {
+    return new HgBranchCommand(context, repository);
+  }
+
   /**
    * Method description
    *
@@ -192,6 +197,7 @@ public class HgRepositoryServiceProvider extends RepositoryServiceProvider
    * @return the corresponding {@link ModificationsCommand} implemented from the Plugins
    * @throws CommandNotSupportedException if there is no Implementation
    */
+  @Override
   public ModificationsCommand getModificationsCommand() {
     return new HgModificationsCommand(context,repository);
   }

scm-plugins/scm-hg-plugin/src/test/java/sonia/scm/repository/spi/HgBranchCommandTest.java

@@ -0,0 +1,22 @@
+package sonia.scm.repository.spi;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+import sonia.scm.repository.Branch;
+
+import java.util.List;
+
+public class HgBranchCommandTest extends AbstractHgCommandTestBase {
+  @Test
+  public void x() {
+    Assertions.assertThat(readBranches()).filteredOn(b -> b.getName().equals("new_branch")).isEmpty();
+
+    new HgBranchCommand(cmdContext, repository).branch("new_branch");
+
+    Assertions.assertThat(readBranches()).filteredOn(b -> b.getName().equals("new_branch")).isNotEmpty();
+  }
+
+  private List<Branch> readBranches() {
+    return new HgBranchesCommand(cmdContext, repository).getBranches();
+  }
+}