Use clone and push to create branches

Generalize workdir creation for git and hg and create branches in
clones instead of the scm repository, so that hooks will be fired
correctly once the changes are pushed back.

Missing:

- Evaluation of the git response from the push command
- configuration of the hg environment and the authentication, so that
  the scmhooks.py script can be triggeret correctly and can callback
  the scm manager

scm-core/src/main/java/sonia/scm/repository/util/CloseableWrapper.java

@@ -1,18 +1,18 @@
-package sonia.scm.repository;
+package sonia.scm.repository.util;
 
 import java.util.function.Consumer;
 
-public class CloseableWrapper<C> implements AutoCloseable {
+public class CloseableWrapper<T> implements AutoCloseable {
 
-  private final C wrapped;
-  private final Consumer<C> cleanup;
+  private final T wrapped;
+  private final Consumer<T> cleanup;
 
-  public CloseableWrapper(C wrapped, Consumer<C> cleanup) {
+  public CloseableWrapper(T wrapped, Consumer<T> cleanup) {
     this.wrapped = wrapped;
     this.cleanup = cleanup;
   }
 
-  public C get() { return wrapped; }
+  public T get() { return wrapped; }
 
   @Override
   public void close() {

scm-core/src/main/java/sonia/scm/repository/util/SimpleWorkdirFactory.java

@@ -0,0 +1,57 @@
+package sonia.scm.repository.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.repository.InternalRepositoryException;
+import sonia.scm.repository.Repository;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
+public class SimpleWorkdirFactory<T extends AutoCloseable, C> {
+
+  private static final Logger logger = LoggerFactory.getLogger(SimpleWorkdirFactory.class);
+
+  private final File poolDirectory;
+
+  private final CloneProvider<T, C> cloneProvider;
+  private final Repository repository;
+
+  public SimpleWorkdirFactory(Repository repository, CloneProvider<T, C> cloneProvider) {
+    this(new File(System.getProperty("java.io.tmpdir"), "scmm-work-pool"), repository, cloneProvider);
+  }
+
+  public SimpleWorkdirFactory(File poolDirectory, Repository repository, CloneProvider<T, C> cloneProvider) {
+    this.poolDirectory = poolDirectory;
+    this.cloneProvider = cloneProvider;
+    this.repository = repository;
+    poolDirectory.mkdirs();
+  }
+
+  public WorkingCopy<T> createWorkingCopy(C context) {
+    try {
+      File directory = createNewWorkdir();
+      T clone = cloneProvider.cloneRepository(context, directory);
+      return new WorkingCopy<>(clone, this::close, directory);
+    } catch (IOException e) {
+      throw new InternalRepositoryException(repository, "could not create temporary directory for clone of repository", e);
+    }
+  }
+
+  private File createNewWorkdir() throws IOException {
+    return Files.createTempDirectory(poolDirectory.toPath(),"workdir").toFile();
+  }
+
+  private void close(T repository) {
+    try {
+      repository.close();
+    } catch (Exception e) {
+      logger.warn("could not close temporary repository clone", e);
+    }
+  }
+
+  public interface CloneProvider<T, C> {
+    T cloneRepository(C context, File target) throws IOException;
+  }
+}

scm-core/src/main/java/sonia/scm/repository/util/WorkdirFactory.java

@@ -0,0 +1,5 @@
+package sonia.scm.repository.util;
+
+public interface WorkdirFactory<T, C> {
+  WorkingCopy<T> createWorkingCopy(C gitContext);
+}

scm-core/src/main/java/sonia/scm/repository/util/WorkingCopy.java

@@ -0,0 +1,31 @@
+package sonia.scm.repository.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.util.IOUtil;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.function.Consumer;
+
+public class WorkingCopy<T> extends CloseableWrapper<T> {
+
+  private static final Logger LOG = LoggerFactory.getLogger(WorkingCopy.class);
+
+  private final File directory;
+
+  public WorkingCopy(T wrapped, Consumer<T> cleanup, File directory) {
+    super(wrapped, cleanup);
+    this.directory = directory;
+  }
+
+  @Override
+  public void close() {
+    super.close();
+    try {
+      IOUtil.delete(directory);
+    } catch (IOException e) {
+      LOG.warn("could not delete temporary workdir '{}'", directory, e);
+    }
+  }
+}

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/GitWorkdirFactory.java

@@ -1,8 +1,8 @@
 package sonia.scm.repository;
 
+import org.eclipse.jgit.lib.Repository;
 import sonia.scm.repository.spi.GitContext;
-import sonia.scm.repository.spi.WorkingCopy;
+import sonia.scm.repository.util.WorkdirFactory;
 
-public interface GitWorkdirFactory {
-  WorkingCopy createWorkingCopy(GitContext gitContext);
+public interface GitWorkdirFactory extends WorkdirFactory<Repository, GitContext> {
 }

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitBranchCommand.java

@@ -35,26 +35,44 @@ package sonia.scm.repository.spi;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.lib.Ref;
+import org.eclipse.jgit.transport.PushResult;
+import org.eclipse.jgit.transport.RemoteRefUpdate;
 import sonia.scm.repository.Branch;
 import sonia.scm.repository.GitUtil;
+import sonia.scm.repository.GitWorkdirFactory;
 import sonia.scm.repository.InternalRepositoryException;
 import sonia.scm.repository.Repository;
+import sonia.scm.repository.util.WorkingCopy;
 
-import java.io.IOException;
+import java.util.stream.StreamSupport;
 
 public class GitBranchCommand extends AbstractGitCommand implements BranchCommand {
 
-  GitBranchCommand(GitContext context, Repository repository) {
+  private final GitWorkdirFactory workdirFactory;
+
+  GitBranchCommand(GitContext context, Repository repository, GitWorkdirFactory workdirFactory) {
     super(context, repository);
+    this.workdirFactory = workdirFactory;
   }
 
   @Override
-  public Branch branch(String name) throws IOException {
-    try (Git git = new Git(open())) {
-      Ref ref = git.branchCreate().setName(name).call();
+  public Branch branch(String name) {
+    try (WorkingCopy<org.eclipse.jgit.lib.Repository> workingCopy = workdirFactory.createWorkingCopy(context)) {
+      Git clone = new Git(workingCopy.get());
+      Ref ref = clone.branchCreate().setName(name).call();
+      Iterable<PushResult> call = clone.push().add(name).call();
+      StreamSupport.stream(call.spliterator(), false)
+        .flatMap(pushResult -> pushResult.getRemoteUpdates().stream())
+        .filter(remoteRefUpdate -> remoteRefUpdate.getStatus() != RemoteRefUpdate.Status.OK)
+        .findFirst()
+        .ifPresent(this::handlePushError);
       return Branch.normalBranch(name, GitUtil.getId(ref.getObjectId()));
     } catch (GitAPIException ex) {
       throw new InternalRepositoryException(repository, "could not create branch " + name, ex);
     }
   }
+
+  private void handlePushError(RemoteRefUpdate remoteRefUpdate) {
+    // TODO handle failed remote update
+  }
 }

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitMergeCommand.java

@@ -20,6 +20,7 @@ import sonia.scm.repository.Person;
 import sonia.scm.repository.RepositoryPermissions;
 import sonia.scm.repository.api.MergeCommandResult;
 import sonia.scm.repository.api.MergeDryRunCommandResult;
+import sonia.scm.repository.util.WorkingCopy;
 import sonia.scm.user.User;
 
 import java.io.IOException;
@@ -48,7 +49,7 @@ public class GitMergeCommand extends AbstractGitCommand implements MergeCommand
   public MergeCommandResult merge(MergeCommandRequest request) {
     RepositoryPermissions.push(context.getRepository().getId()).check();
 
-    try (WorkingCopy workingCopy = workdirFactory.createWorkingCopy(context)) {
+    try (WorkingCopy<Repository> workingCopy = workdirFactory.createWorkingCopy(context)) {
       Repository repository = workingCopy.get();
       logger.debug("cloned repository to folder {}", repository.getWorkTree());
       return new MergeWorker(repository, request).merge();

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitRepositoryServiceProvider.java

@@ -129,7 +129,7 @@ public class GitRepositoryServiceProvider extends RepositoryServiceProvider
   @Override
   public BranchCommand getBranchCommand()
   {
-    return new GitBranchCommand(context, repository);
+    return new GitBranchCommand(context, repository, handler.getWorkdirFactory());
   }
 
   /**

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/SimpleGitWorkdirFactory.java

@@ -9,59 +9,40 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import sonia.scm.repository.GitWorkdirFactory;
 import sonia.scm.repository.InternalRepositoryException;
+import sonia.scm.repository.util.SimpleWorkdirFactory;
+import sonia.scm.repository.util.WorkingCopy;
 
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 
-public class SimpleGitWorkdirFactory implements GitWorkdirFactory {
-
-  private static final Logger logger = LoggerFactory.getLogger(SimpleGitWorkdirFactory.class);
-
-  private final File poolDirectory;
+public class SimpleGitWorkdirFactory extends SimpleWorkdirFactory<Repository, GitContext> implements GitWorkdirFactory {
 
   public SimpleGitWorkdirFactory() {
-    this(new File(System.getProperty("java.io.tmpdir"), "scmm-git-pool"));
+    super(null, new GitCloneProvider());
   }
 
   public SimpleGitWorkdirFactory(File poolDirectory) {
-    this.poolDirectory = poolDirectory;
-    poolDirectory.mkdirs();
+    super(poolDirectory, null, new GitCloneProvider());
   }
 
-  public WorkingCopy createWorkingCopy(GitContext gitContext) {
-    try {
-      Repository clone = cloneRepository(gitContext.getDirectory(), createNewWorkdir());
-      return new WorkingCopy(clone, this::close);
-    } catch (GitAPIException e) {
-      throw new InternalRepositoryException(gitContext.getRepository(), "could not clone working copy of repository", e);
-    } catch (IOException e) {
-      throw new InternalRepositoryException(gitContext.getRepository(), "could not create temporary directory for clone of repository", e);
+  private static class GitCloneProvider implements CloneProvider<Repository, GitContext> {
+
+    @Override
+    public Repository cloneRepository(GitContext context, File target) {
+      try {
+        return Git.cloneRepository()
+          .setURI(createScmTransportProtocolUri(context.getDirectory()))
+          .setDirectory(target)
+          .call()
+          .getRepository();
+      } catch (GitAPIException e) {
+        throw new InternalRepositoryException(context.getRepository(), "could not clone working copy of repository", e);
+      }
     }
-  }
 
-  private File createNewWorkdir() throws IOException {
-    return Files.createTempDirectory(poolDirectory.toPath(),"workdir").toFile();
-  }
-
-  protected Repository cloneRepository(File bareRepository, File target) throws GitAPIException {
-    return Git.cloneRepository()
-      .setURI(createScmTransportProtocolUri(bareRepository))
-      .setDirectory(target)
-      .call()
-      .getRepository();
-  }
-
-  private String createScmTransportProtocolUri(File bareRepository) {
-    return ScmTransportProtocol.NAME + "://" + bareRepository.getAbsolutePath();
-  }
-
-  private void close(Repository repository) {
-    repository.close();
-    try {
-      FileUtils.delete(repository.getWorkTree(), FileUtils.RECURSIVE);
-    } catch (IOException e) {
-      logger.warn("could not delete temporary git workdir '{}'", repository.getWorkTree(), e);
+    private String createScmTransportProtocolUri(File bareRepository) {
+      return ScmTransportProtocol.NAME + "://" + bareRepository.getAbsolutePath();
     }
   }
 }

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/WorkingCopy.java

@@ -1,12 +0,0 @@
-package sonia.scm.repository.spi;
-
-import org.eclipse.jgit.lib.Repository;
-import sonia.scm.repository.CloseableWrapper;
-
-import java.util.function.Consumer;
-
-public class WorkingCopy extends CloseableWrapper<Repository> {
-  WorkingCopy(Repository wrapped, Consumer<Repository> cleanup) {
-    super(wrapped, cleanup);
-  }
-}

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/CloseableWrapperTest.java

@@ -1,6 +1,7 @@
 package sonia.scm.repository;
 
 import org.junit.Test;
+import sonia.scm.repository.util.CloseableWrapper;
 
 import java.util.function.Consumer;
 

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/AbstractGitCommandTestBase.java

@@ -34,11 +34,19 @@ package sonia.scm.repository.spi;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import org.eclipse.jgit.transport.ScmTransportProtocol;
+import org.eclipse.jgit.transport.Transport;
 import org.junit.After;
+import org.junit.Before;
 import sonia.scm.api.v2.resources.GitRepositoryConfigStoreProvider;
 import sonia.scm.repository.GitRepositoryConfig;
+import sonia.scm.repository.PreProcessorUtil;
+import sonia.scm.repository.api.HookContextFactory;
 import sonia.scm.store.InMemoryConfigurationStoreFactory;
 
+import static com.google.inject.util.Providers.of;
+import static org.mockito.Mockito.mock;
+
 /**
  *
  * @author Sebastian Sdorra
@@ -105,4 +113,5 @@ public class AbstractGitCommandTestBase extends ZippedRepositoryTestBase
 
   /** Field description */
   private GitContext context;
+  private ScmTransportProtocol scmTransportProtocol;
 }

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/BindTransportProtocolRule.java

@@ -0,0 +1,38 @@
+package sonia.scm.repository.spi;
+
+import org.eclipse.jgit.transport.ScmTransportProtocol;
+import org.eclipse.jgit.transport.Transport;
+import org.junit.rules.ExternalResource;
+import sonia.scm.repository.GitRepositoryHandler;
+import sonia.scm.repository.PreProcessorUtil;
+import sonia.scm.repository.RepositoryManager;
+import sonia.scm.repository.api.HookContextFactory;
+
+import static com.google.inject.util.Providers.of;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class BindTransportProtocolRule extends ExternalResource {
+
+  private ScmTransportProtocol scmTransportProtocol;
+
+  @Override
+  protected void before() throws Throwable {
+    HookContextFactory hookContextFactory = new HookContextFactory(mock(PreProcessorUtil.class));
+    RepositoryManager repositoryManager = mock(RepositoryManager.class);
+    HookEventFacade hookEventFacade = new HookEventFacade(of(repositoryManager), hookContextFactory);
+    GitRepositoryHandler gitRepositoryHandler = mock(GitRepositoryHandler.class);
+    scmTransportProtocol = new ScmTransportProtocol(of(hookEventFacade), of(gitRepositoryHandler));
+
+    Transport.register(scmTransportProtocol);
+
+    when(gitRepositoryHandler.getRepositoryId(any())).thenReturn("1");
+    when(repositoryManager.get("1")).thenReturn(new sonia.scm.repository.Repository());
+  }
+
+  @Override
+  protected void after() {
+    Transport.unregister(scmTransportProtocol);
+  }
+}

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitBranchCommandTest.java

@@ -1,6 +1,7 @@
 package sonia.scm.repository.spi;
 
 import org.assertj.core.api.Assertions;
+import org.junit.Rule;
 import org.junit.Test;
 import sonia.scm.repository.Branch;
 
@@ -10,13 +11,16 @@ import java.util.List;
 
 public class GitBranchCommandTest extends AbstractGitCommandTestBase {
 
+  @Rule
+  public BindTransportProtocolRule transportProtocolRule = new BindTransportProtocolRule();
+
   @Test
   public void shouldCreateBranch() throws IOException {
     GitContext context = createContext();
 
     Assertions.assertThat(readBranches(context)).filteredOn(b -> b.getName().equals("new_branch")).isEmpty();
 
-    new GitBranchCommand(context, repository).branch("new_branch");
+    new GitBranchCommand(context, repository, new SimpleGitWorkdirFactory()).branch("new_branch");
 
     Assertions.assertThat(readBranches(context)).filteredOn(b -> b.getName().equals("new_branch")).isNotEmpty();
   }

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitMergeCommandTest.java

@@ -41,27 +41,8 @@ public class GitMergeCommandTest extends AbstractGitCommandTestBase {
 
   @Rule
   public ShiroRule shiro = new ShiroRule();
-
-  private ScmTransportProtocol scmTransportProtocol;
-
-  @Before
-  public void bindScmProtocol() {
-    HookContextFactory hookContextFactory = new HookContextFactory(mock(PreProcessorUtil.class));
-    RepositoryManager repositoryManager = mock(RepositoryManager.class);
-    HookEventFacade hookEventFacade = new HookEventFacade(of(repositoryManager), hookContextFactory);
-    GitRepositoryHandler gitRepositoryHandler = mock(GitRepositoryHandler.class);
-    scmTransportProtocol = new ScmTransportProtocol(of(hookEventFacade), of(gitRepositoryHandler));
-
-    Transport.register(scmTransportProtocol);
-
-    when(gitRepositoryHandler.getRepositoryId(any())).thenReturn("1");
-    when(repositoryManager.get("1")).thenReturn(new sonia.scm.repository.Repository());
-  }
-
-  @After
-  public void unregisterScmProtocol() {
-    Transport.unregister(scmTransportProtocol);
-  }
+  @Rule
+  public BindTransportProtocolRule transportProtocolRule = new BindTransportProtocolRule();
 
   @Test
   public void shouldDetectMergeableBranches() {

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/SimpleGitWorkdirFactoryTest.java

@@ -12,6 +12,7 @@ import sonia.scm.repository.GitRepositoryHandler;
 import sonia.scm.repository.PreProcessorUtil;
 import sonia.scm.repository.RepositoryManager;
 import sonia.scm.repository.api.HookContextFactory;
+import sonia.scm.repository.util.WorkingCopy;
 
 import java.io.File;
 import java.io.IOException;
@@ -44,7 +45,7 @@ public class SimpleGitWorkdirFactoryTest extends AbstractGitCommandTestBase {
     SimpleGitWorkdirFactory factory = new SimpleGitWorkdirFactory(temporaryFolder.newFolder());
     File masterRepo = createRepositoryDirectory();
 
-    try (WorkingCopy workingCopy = factory.createWorkingCopy(createContext())) {
+    try (WorkingCopy<Repository> workingCopy = factory.createWorkingCopy(createContext())) {
 
       assertThat(workingCopy.get().getDirectory())
         .exists()
@@ -57,25 +58,15 @@ public class SimpleGitWorkdirFactoryTest extends AbstractGitCommandTestBase {
     }
   }
 
-  @Test
-  public void cloneFromPoolShouldBeClosed() throws IOException {
-    PoolWithSpy factory = new PoolWithSpy(temporaryFolder.newFolder());
-
-    try (WorkingCopy workingCopy = factory.createWorkingCopy(createContext())) {
-      assertThat(workingCopy).isNotNull();
-    }
-    verify(factory.createdClone).close();
-  }
-
   @Test
   public void cloneFromPoolShouldNotBeReused() throws IOException {
     SimpleGitWorkdirFactory factory = new SimpleGitWorkdirFactory(temporaryFolder.newFolder());
 
     File firstDirectory;
-    try (WorkingCopy workingCopy = factory.createWorkingCopy(createContext())) {
+    try (WorkingCopy<Repository> workingCopy = factory.createWorkingCopy(createContext())) {
       firstDirectory = workingCopy.get().getDirectory();
     }
-    try (WorkingCopy workingCopy = factory.createWorkingCopy(createContext())) {
+    try (WorkingCopy<Repository> workingCopy = factory.createWorkingCopy(createContext())) {
       File secondDirectory = workingCopy.get().getDirectory();
       assertThat(secondDirectory).isNotEqualTo(firstDirectory);
     }
@@ -86,23 +77,9 @@ public class SimpleGitWorkdirFactoryTest extends AbstractGitCommandTestBase {
     SimpleGitWorkdirFactory factory = new SimpleGitWorkdirFactory(temporaryFolder.newFolder());
 
     File directory;
-    try (WorkingCopy workingCopy = factory.createWorkingCopy(createContext())) {
+    try (WorkingCopy<Repository> workingCopy = factory.createWorkingCopy(createContext())) {
       directory = workingCopy.get().getWorkTree();
     }
     assertThat(directory).doesNotExist();
   }
-
-  private static class PoolWithSpy extends SimpleGitWorkdirFactory {
-    PoolWithSpy(File poolDirectory) {
-      super(poolDirectory);
-    }
-
-    Repository createdClone;
-
-    @Override
-    protected Repository cloneRepository(File bareRepository, File destination) throws GitAPIException {
-      createdClone = spy(super.cloneRepository(bareRepository, destination));
-      return createdClone;
-    }
-  }
 }

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

@@ -53,6 +53,7 @@ import sonia.scm.io.INISection;
 import sonia.scm.plugin.Extension;
 import sonia.scm.plugin.PluginLoader;
 import sonia.scm.repository.spi.HgRepositoryServiceProvider;
+import sonia.scm.repository.spi.HgWorkdirFactory;
 import sonia.scm.store.ConfigurationStoreFactory;
 import sonia.scm.util.IOUtil;
 import sonia.scm.util.SystemUtil;
@@ -113,10 +114,11 @@ public class HgRepositoryHandler
   public HgRepositoryHandler(ConfigurationStoreFactory storeFactory,
                              Provider<HgContext> hgContextProvider,
                              RepositoryLocationResolver repositoryLocationResolver,
-                             PluginLoader pluginLoader)
+                             PluginLoader pluginLoader, HgWorkdirFactory workdirFactory)
   {
     super(storeFactory, repositoryLocationResolver, pluginLoader);
     this.hgContextProvider = hgContextProvider;
+    this.workdirFactory = workdirFactory;
 
     try
     {
@@ -408,6 +410,10 @@ public class HgRepositoryHandler
     }
   }
 
+  public HgWorkdirFactory getWorkdirFactory() {
+    return workdirFactory;
+  }
+
   //~--- fields ---------------------------------------------------------------
 
   /** Field description */
@@ -415,4 +421,6 @@ public class HgRepositoryHandler
 
   /** Field description */
   private JAXBContext jaxbContext;
+
+  private final HgWorkdirFactory workdirFactory;
 }

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

@@ -32,10 +32,14 @@ package sonia.scm.repository.spi;
 
 import com.aragost.javahg.Changeset;
 import com.aragost.javahg.commands.CommitCommand;
+import com.aragost.javahg.commands.PushCommand;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import sonia.scm.repository.Branch;
 import sonia.scm.repository.Repository;
+import sonia.scm.repository.util.WorkingCopy;
+
+import java.io.IOException;
 
 /**
  * Mercurial implementation of the {@link BranchCommand}.
@@ -45,24 +49,37 @@ public class HgBranchCommand extends AbstractCommand implements BranchCommand {
 
   private static final Logger LOG = LoggerFactory.getLogger(HgBranchCommand.class);
 
-  HgBranchCommand(HgCommandContext context, Repository repository) {
+  private final HgWorkdirFactory workdirFactory;
+
+  HgBranchCommand(HgCommandContext context, Repository repository, HgWorkdirFactory workdirFactory) {
     super(context, repository);
+    this.workdirFactory = workdirFactory;
   }
 
   @Override
-  public Branch branch(String name) {
-    com.aragost.javahg.Repository repository = open();
-    com.aragost.javahg.commands.BranchCommand.on(repository).set(name);
+  public Branch branch(String name) throws IOException {
+    try (WorkingCopy<RepositoryCloseableWrapper> workingCopy = workdirFactory.createWorkingCopy(getContext())) {
+      com.aragost.javahg.Repository repository = workingCopy.get().get();
+      com.aragost.javahg.commands.BranchCommand.on(repository).set(name);
 
-    Changeset emptyChangeset = CommitCommand
-      .on(repository)
-      .user("SCM-Manager")
-      .message("Create new branch " + name)
-      .execute();
+      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());
+      PushCommand pushCommand = PushCommand
+        .on(repository)
+        .branch(name)
+        .newBranch();
+      pushCommand
+        .cmdAppend("--config", "");
+      pushCommand  .execute();
 
-    return Branch.normalBranch(name, emptyChangeset.getNode());
+      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

@@ -128,7 +128,7 @@ public class HgRepositoryServiceProvider extends RepositoryServiceProvider
 
   @Override
   public BranchCommand getBranchCommand() {
-    return new HgBranchCommand(context, repository);
+    return new HgBranchCommand(context, repository, handler.getWorkdirFactory());
   }
 
   /**

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

@@ -0,0 +1,6 @@
+package sonia.scm.repository.spi;
+
+import sonia.scm.repository.util.WorkdirFactory;
+
+public interface HgWorkdirFactory extends WorkdirFactory<RepositoryCloseableWrapper, HgCommandContext> {
+}

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

@@ -0,0 +1,43 @@
+package sonia.scm.repository.spi;
+
+import com.aragost.javahg.Repository;
+import com.aragost.javahg.commands.CloneCommand;
+import sonia.scm.repository.util.SimpleWorkdirFactory;
+
+import java.io.File;
+import java.io.IOException;
+
+public class SimpleHgWorkdirFactory extends SimpleWorkdirFactory<RepositoryCloseableWrapper, HgCommandContext> implements HgWorkdirFactory {
+  public SimpleHgWorkdirFactory() {
+    super(null, new HgCloneProvider());
+  }
+
+  public SimpleHgWorkdirFactory(File poolDirectory) {
+    super(poolDirectory, null, new HgCloneProvider());
+  }
+
+  private static class HgCloneProvider implements CloneProvider<RepositoryCloseableWrapper, HgCommandContext> {
+
+    @Override
+    public RepositoryCloseableWrapper cloneRepository(HgCommandContext context, File target) throws IOException {
+      String execute = CloneCommand.on(context.open()).execute(target.getAbsolutePath());
+      return new RepositoryCloseableWrapper(Repository.open(target));
+    }
+  }
+}
+
+class RepositoryCloseableWrapper implements AutoCloseable {
+  private final Repository delegate;
+
+  RepositoryCloseableWrapper(Repository delegate) {
+    this.delegate = delegate;
+  }
+
+  Repository get() {
+    return delegate;
+  }
+
+  @Override
+  public void close() {
+  }
+}

scm-plugins/scm-hg-plugin/src/main/java/sonia/scm/web/HgServletModule.java

@@ -46,6 +46,8 @@ import sonia.scm.plugin.Extension;
 import sonia.scm.repository.HgContext;
 import sonia.scm.repository.HgContextProvider;
 import sonia.scm.repository.HgHookManager;
+import sonia.scm.repository.spi.HgWorkdirFactory;
+import sonia.scm.repository.spi.SimpleHgWorkdirFactory;
 
 /**
  *
@@ -81,5 +83,7 @@ public class HgServletModule extends ServletModule
 
     // bind servlets
     serve(MAPPING_HOOK).with(HgHookCallbackServlet.class);
+
+    bind(HgWorkdirFactory.class).to(SimpleHgWorkdirFactory.class);
   }
 }

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

@@ -77,7 +77,7 @@ public class HgRepositoryHandlerTest extends SimpleRepositoryHandlerTestBase {
 
   @Override
   protected RepositoryHandler createRepositoryHandler(ConfigurationStoreFactory factory, RepositoryLocationResolver locationResolver, File directory) {
-    HgRepositoryHandler handler = new HgRepositoryHandler(factory, new HgContextProvider(), locationResolver, null);
+    HgRepositoryHandler handler = new HgRepositoryHandler(factory, new HgContextProvider(), locationResolver, null, null);
 
     handler.init(contextProvider);
     HgTestUtil.checkForSkip(handler);
@@ -87,7 +87,7 @@ public class HgRepositoryHandlerTest extends SimpleRepositoryHandlerTestBase {
 
   @Test
   public void getDirectory() {
-    HgRepositoryHandler repositoryHandler = new HgRepositoryHandler(factory, provider, locationResolver, null);
+    HgRepositoryHandler repositoryHandler = new HgRepositoryHandler(factory, provider, locationResolver, null, null);
 
     HgConfig hgConfig = new HgConfig();
     hgConfig.setHgBinary("hg");

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

@@ -105,7 +105,7 @@ public final class HgTestUtil
 
     RepositoryLocationResolver repositoryLocationResolver = new RepositoryLocationResolver(context, repoDao, new InitialRepositoryLocationResolver());
     HgRepositoryHandler handler =
-      new HgRepositoryHandler(new InMemoryConfigurationStoreFactory(), new HgContextProvider(), repositoryLocationResolver, null);
+      new HgRepositoryHandler(new InMemoryConfigurationStoreFactory(), new HgContextProvider(), repositoryLocationResolver, null, null);
     Path repoDir = directory.toPath();
     when(repoDao.getPath(any())).thenReturn(repoDir);
     handler.init(context);

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

@@ -4,14 +4,15 @@ import org.assertj.core.api.Assertions;
 import org.junit.Test;
 import sonia.scm.repository.Branch;
 
+import java.io.IOException;
 import java.util.List;
 
 public class HgBranchCommandTest extends AbstractHgCommandTestBase {
   @Test
-  public void x() {
+  public void x() throws IOException {
     Assertions.assertThat(readBranches()).filteredOn(b -> b.getName().equals("new_branch")).isEmpty();
 
-    new HgBranchCommand(cmdContext, repository).branch("new_branch");
+    new HgBranchCommand(cmdContext, repository, new SimpleHgWorkdirFactory()).branch("new_branch");
 
     Assertions.assertThat(readBranches()).filteredOn(b -> b.getName().equals("new_branch")).isNotEmpty();
   }