added browser support for git submodules

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

@@ -54,12 +54,15 @@ import sonia.scm.util.Util;
 
 //~--- JDK imports ------------------------------------------------------------
 
+import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.OutputStream;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
 
 /**
  *
@@ -68,6 +71,9 @@ import java.util.List;
 public class GitRepositoryBrowser implements RepositoryBrowser
 {
 
+  /** Field description */
+  public static final String PATH_MODULES = ".gitmodules";
+
   /** the logger for GitRepositoryBrowser */
   private static final Logger logger =
     LoggerFactory.getLogger(GitRepositoryBrowser.class);
@@ -98,7 +104,6 @@ public class GitRepositoryBrowser implements RepositoryBrowser
    * @param path
    * @param output
    *
-   *
    * @throws IOException
    * @throws RepositoryException
    */
@@ -108,6 +113,37 @@ public class GitRepositoryBrowser implements RepositoryBrowser
   {
     File directory = handler.getDirectory(repository);
     org.eclipse.jgit.lib.Repository repo = GitUtil.open(directory);
+
+    try
+    {
+      ObjectId revId = GitUtil.getRevisionId(repo, revision);
+
+      getContent(repo, revId, path, output);
+    }
+    finally
+    {
+      GitUtil.close(repo);
+    }
+  }
+
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param repo
+   * @param revId
+   * @param path
+   * @param output
+   *
+   *
+   * @throws IOException
+   * @throws RepositoryException
+   */
+  public void getContent(org.eclipse.jgit.lib.Repository repo, ObjectId revId,
+                         String path, OutputStream output)
+          throws IOException, RepositoryException
+  {
     TreeWalk treeWalk = null;
     RevWalk revWalk = null;
 
@@ -116,8 +152,6 @@ public class GitRepositoryBrowser implements RepositoryBrowser
       treeWalk = new TreeWalk(repo);
       treeWalk.setRecursive(Util.nonNull(path).contains("/"));
 
-      ObjectId revId = GitUtil.getRevisionId(repo, revision);
-
       if (logger.isDebugEnabled())
       {
         logger.debug("load content for {} at {}", path, revId.name());
@@ -166,7 +200,6 @@ public class GitRepositoryBrowser implements RepositoryBrowser
     {
       GitUtil.release(revWalk);
       GitUtil.release(treeWalk);
-      GitUtil.close(repo);
     }
   }
 
@@ -232,6 +265,64 @@ public class GitRepositoryBrowser implements RepositoryBrowser
 
   //~--- methods --------------------------------------------------------------
 
+  /**
+   * Method description
+   *
+   *
+   * @param files
+   * @param repo
+   * @param revId
+   * @param path
+   *
+   * @throws IOException
+   * @throws RepositoryException
+   */
+  private void appendSubModules(List<FileObject> files,
+                                org.eclipse.jgit.lib.Repository repo,
+                                ObjectId revId, String path)
+          throws IOException, RepositoryException
+  {
+    path = Util.nonNull(path);
+
+    Map<String, SubRepository> subRepositories = getSubRepositories(repo,
+                                                   revId);
+
+    if (subRepositories != null)
+    {
+      for (Entry<String, SubRepository> e : subRepositories.entrySet())
+      {
+        String p = e.getKey();
+
+        if (p.startsWith(path))
+        {
+          p = p.substring(path.length());
+
+          if (p.startsWith("/"))
+          {
+            p = p.substring(1);
+          }
+
+          if (p.endsWith("/"))
+          {
+            p = p.substring(0, p.length() - 1);
+          }
+
+          if (!p.contains("/"))
+          {
+            FileObject fo = new FileObject();
+
+            fo.setDirectory(true);
+            fo.setPath(path);
+            fo.setName(p);
+            fo.setSubRepository(e.getValue());
+            
+            files.add(fo);
+          }
+        }
+      }
+    }
+  }
+
   /**
    * Method description
    *
@@ -349,10 +440,11 @@ public class GitRepositoryBrowser implements RepositoryBrowser
    * @return
    *
    * @throws IOException
+   * @throws RepositoryException
    */
   private BrowserResult getResult(org.eclipse.jgit.lib.Repository repo,
                                   ObjectId revId, String path)
-          throws IOException
+          throws IOException, RepositoryException
   {
     BrowserResult result = null;
     RevWalk revWalk = null;
@@ -383,6 +475,8 @@ public class GitRepositoryBrowser implements RepositoryBrowser
 
       List<FileObject> files = new ArrayList<FileObject>();
 
+      appendSubModules(files, repo, revId, path);
+
       if (Util.isEmpty(path))
       {
         while (treeWalk.next())
@@ -439,6 +533,44 @@ public class GitRepositoryBrowser implements RepositoryBrowser
     return result;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param repo
+   * @param revision
+   *
+   * @return
+   *
+   * @throws IOException
+   * @throws RepositoryException
+   */
+  private Map<String, SubRepository> getSubRepositories(
+          org.eclipse.jgit.lib.Repository repo, ObjectId revision)
+          throws IOException, RepositoryException
+  {
+    if (logger.isDebugEnabled())
+    {
+      logger.debug("read submodules of {} at {}", repository.getName(),
+                   revision);
+    }
+
+    Map<String, SubRepository> subRepositories = null;
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+    try
+    {
+      getContent(repo, revision, PATH_MODULES, baos);
+      subRepositories = GitSubModuleParser.parse(baos.toString());
+    }
+    catch (PathNotFoundException ex)
+    {
+      logger.trace("could not find .gitmodules", ex);
+    }
+
+    return subRepositories;
+  }
+
   //~--- fields ---------------------------------------------------------------
 
   /** Field description */

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

@@ -0,0 +1,109 @@
+/**
+ * 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;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import sonia.scm.util.Util;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+public class GitSubModuleParser
+{
+
+  /**
+   * //~--- methods --------------------------------------------------------------
+   *
+   *
+   * Method description
+   *
+   *
+   * @param content
+   *
+   * @return
+   */
+  public static Map<String, SubRepository> parse(String content)
+  {
+    Map<String, SubRepository> subRepositories = new HashMap<String,
+                                                   SubRepository>();
+    Scanner scanner = new Scanner(content);
+    SubRepository repository = null;
+
+    while (scanner.hasNextLine())
+    {
+      String line = scanner.nextLine();
+
+      if (Util.isNotEmpty(line))
+      {
+        line = line.trim();
+
+        if (line.startsWith("[") && line.endsWith("]"))
+        {
+          repository = new SubRepository();
+        }
+        else if (line.startsWith("path"))
+        {
+          subRepositories.put(getValue(line), repository);
+        }
+        else if (line.startsWith("url"))
+        {
+          repository.setRepositoryUrl(getValue(line));
+        }
+      }
+    }
+
+    return subRepositories;
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param line
+   *
+   * @return
+   */
+  private static String getValue(String line)
+  {
+    return line.split("=")[1].trim();
+  }
+}