start implementation of repository client api for git

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

@@ -0,0 +1,90 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+
+import sonia.scm.repository.client.api.RepositoryClientException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitAddCommand implements AddCommand
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param git
+   */
+  GitAddCommand(Git git)
+  {
+    this.git = git;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param path
+   *
+   * @throws IOException
+   */
+  @Override
+  public void add(String path) throws IOException
+  {
+    try
+    {
+      git.add().addFilepattern(path).call();
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException("could not add file to repository");
+    }
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Git git;
+}

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

@@ -0,0 +1,95 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+
+import sonia.scm.repository.Branch;
+import sonia.scm.repository.client.api.RepositoryClientException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitBranchCommand implements BranchCommand
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param git
+   */
+  GitBranchCommand(Git git)
+  {
+    this.git = git;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param name
+   *
+   * @return
+   *
+   * @throws IOException
+   */
+  @Override
+  public Branch branch(String name) throws IOException
+  {
+    try
+    {
+      git.branchCreate().setName(name).call();
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException("could not create branch", ex);
+    }
+
+    return new Branch(name);
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Git git;
+}

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

@@ -0,0 +1,116 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.io.Closeables;
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.eclipse.jgit.revwalk.RevCommit;
+
+import sonia.scm.repository.Changeset;
+import sonia.scm.repository.GitChangesetConverter;
+import sonia.scm.repository.GitUtil;
+import sonia.scm.repository.client.api.RepositoryClientException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitCommitCommand implements CommitCommand
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param git
+   */
+  GitCommitCommand(Git git)
+  {
+    this.git = git;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   *
+   * @return
+   *
+   * @throws IOException
+   */
+  @Override
+  public Changeset commit(CommitRequest request) throws IOException
+  {
+    Changeset changeset = null;
+    GitChangesetConverter converter = null;
+
+    try
+    {
+      RevCommit commit = git.commit().setAuthor(
+                           request.getAuthor().getName(),
+                           request.getAuthor().getMail()).setMessage(
+                             request.getMessage()).call();
+
+      converter = new GitChangesetConverter(git.getRepository(),
+        GitUtil.ID_LENGTH);
+
+      changeset = converter.createChangeset(commit);
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException(
+        "could not commit changes to repository", ex);
+    }
+    finally
+    {
+      Closeables.closeQuietly(converter);
+    }
+
+    return changeset;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Git git;
+}

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

@@ -0,0 +1,90 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+
+import sonia.scm.repository.client.api.RepositoryClientException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitRemoveCommand implements RemoveCommand
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param git
+   */
+  GitRemoveCommand(Git git)
+  {
+    this.git = git;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param path
+   *
+   * @throws IOException
+   */
+  @Override
+  public void remove(String path) throws IOException
+  {
+    try
+    {
+      git.rm().addFilepattern(path).call();
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException("could not remove file");
+    }
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Git git;
+}

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

@@ -0,0 +1,118 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider;
+
+import sonia.scm.repository.client.api.RepositoryClientException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitRepositoryClientFactoryProvider
+  implements RepositoryClientFactoryProvider
+{
+
+  /**
+   * Method description
+   *
+   *
+   * @param main
+   * @param workingCopy
+   *
+   * @return
+   *
+   * @throws IOException
+   */
+  @Override
+  public RepositoryClientProvider create(File main, File workingCopy)
+    throws IOException
+  {
+    Git git = null;
+
+    try
+    {
+      git = Git.cloneRepository().setURI(main.toURI().toString()).setDirectory(
+        workingCopy).call();
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException("could not clone repository", ex);
+    }
+
+    return new GitRepositoryClientProvider(git);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param url
+   * @param username
+   * @param password
+   * @param workingCopy
+   *
+   * @return
+   *
+   * @throws IOException
+   */
+  @Override
+  public RepositoryClientProvider create(String url, String username,
+    String password, File workingCopy)
+    throws IOException
+  {
+    Git git = null;
+
+    try
+    {
+      git = Git.cloneRepository().setURI(url).setDirectory(
+        workingCopy).setCredentialsProvider(
+        new UsernamePasswordCredentialsProvider(username, password)).call();
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException("could not clone repository", ex);
+    }
+
+    return new GitRepositoryClientProvider(git);
+  }
+}

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

@@ -0,0 +1,149 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.collect.ImmutableSet;
+
+import org.eclipse.jgit.api.Git;
+
+import sonia.scm.repository.client.api.ClientCommand;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.Set;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitRepositoryClientProvider extends RepositoryClientProvider
+{
+
+  /** Field description */
+  private static final Set<ClientCommand> SUPPORTED_COMMANDS =
+    ImmutableSet.of(ClientCommand.ADD, ClientCommand.REMOVE,
+      ClientCommand.COMMIT, ClientCommand.TAG, ClientCommand.BANCH);
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param git
+   */
+  GitRepositoryClientProvider(Git git)
+  {
+    this.git = git;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public AddCommand getAddCommand()
+  {
+    return new GitAddCommand(git);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public BranchCommand getBranchCommand()
+  {
+    return new GitBranchCommand(git);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public CommitCommand getCommitCommand()
+  {
+    return new GitCommitCommand(git);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public RemoveCommand getRemoveCommand()
+  {
+    return new GitRemoveCommand(git);
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public Set<ClientCommand> getSupportedClientCommands()
+  {
+    return SUPPORTED_COMMANDS;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public TagCommand getTagCommand()
+  {
+    return new GitTagCommand(git);
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Git git;
+}

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

@@ -0,0 +1,136 @@
+/**
+ * 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.client.spi;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.base.Strings;
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.Ref;
+import org.eclipse.jgit.revwalk.RevObject;
+import org.eclipse.jgit.revwalk.RevWalk;
+
+import sonia.scm.repository.GitUtil;
+import sonia.scm.repository.Tag;
+import sonia.scm.repository.client.api.RepositoryClientException;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitTagCommand implements TagCommand
+{
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param git
+   */
+  GitTagCommand(Git git)
+  {
+    this.git = git;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   *
+   * @return
+   *
+   * @throws IOException
+   */
+  @Override
+  public Tag tag(TagRequest request) throws IOException
+  {
+    Tag tag = null;
+    String revision = request.getRevision();
+
+    RevObject revObject = null;
+
+    if (!Strings.isNullOrEmpty(revision))
+    {
+      ObjectId id = git.getRepository().resolve(revision);
+      RevWalk walk = null;
+
+      try
+      {
+        walk = new RevWalk(git.getRepository());
+        revObject = walk.parseAny(id);
+      }
+      finally
+      {
+        GitUtil.release(walk);
+      }
+    }
+
+    try
+    {
+      Ref ref = null;
+
+      if (revObject != null)
+      {
+        ref =
+          git.tag().setObjectId(revObject).setName(request.getName()).call();
+      }
+      else
+      {
+        ref = git.tag().setObjectId(revObject).call();
+      }
+
+      tag = new Tag(request.getName(), ref.getPeeledObjectId().toString());
+
+    }
+    catch (GitAPIException ex)
+    {
+      throw new RepositoryClientException("could not create tag", ex);
+    }
+
+    return tag;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private Git git;
+}