Added checking for the master branch.

services/git-bridge/src/uk/ac/ic/wlgitbridge/git/handler/hook/WriteLatexPutHook.java

@@ -8,6 +8,7 @@ import org.eclipse.jgit.transport.ReceivePack;
 import uk.ac.ic.wlgitbridge.bridge.RawDirectoryContents;
 import uk.ac.ic.wlgitbridge.bridge.WriteLatexDataSource;
 import uk.ac.ic.wlgitbridge.git.handler.hook.exception.ForcedPushException;
+import uk.ac.ic.wlgitbridge.git.handler.hook.exception.WrongBranchException;
 import uk.ac.ic.wlgitbridge.git.util.RepositoryObjectTreeWalker;
 import uk.ac.ic.wlgitbridge.writelatex.api.request.push.exception.OutOfDateException;
 import uk.ac.ic.wlgitbridge.writelatex.api.request.push.exception.SnapshotPostException;
@@ -56,11 +57,18 @@ public class WriteLatexPutHook implements PreReceiveHook {
     }
 
     private void handleReceiveCommand(Repository repository, ReceiveCommand receiveCommand) throws IOException, SnapshotPostException, FailedConnectionException {
+        checkBranch(receiveCommand);
         checkForcedPush(receiveCommand);
         writeLatexDataSource.putDirectoryContentsToProjectWithName(repository.getWorkTree().getName(),
-                                                                   getPushedDirectoryContents(repository,
-                                                                                              receiveCommand),
-                                                                   hostname);
+                getPushedDirectoryContents(repository,
+                        receiveCommand),
+                hostname);
+    }
+
+    private void checkBranch(ReceiveCommand receiveCommand) throws WrongBranchException {
+        if (!receiveCommand.getRefName().equals("refs/heads/master")) {
+            throw new WrongBranchException();
+        }
     }
 
     private void checkForcedPush(ReceiveCommand receiveCommand) throws ForcedPushException {

services/git-bridge/src/uk/ac/ic/wlgitbridge/git/handler/hook/exception/ForcedPushException.java

@@ -1,6 +1,7 @@
 package uk.ac.ic.wlgitbridge.git.handler.hook.exception;
 
 import com.google.gson.JsonElement;
+import uk.ac.ic.wlgitbridge.util.Util;
 import uk.ac.ic.wlgitbridge.writelatex.api.request.push.exception.SnapshotPostException;
 
 import java.util.Arrays;
@@ -12,7 +13,7 @@ import java.util.List;
 public class ForcedPushException extends SnapshotPostException {
 
     private static final String[] DESCRIPTION_LINES = {
-            "You can't git push --force to a WriteLatex project.",
+            "You can't git push --force to a " + Util.getServiceName() + " project.",
             "Try to put your changes on top of the current head.",
             "If everything else fails, delete and reclone your repository, make your changes, then push again."
     };
@@ -31,4 +32,5 @@ public class ForcedPushException extends SnapshotPostException {
     public void fromJSON(JsonElement json) {
 
     }
+
 }

services/git-bridge/src/uk/ac/ic/wlgitbridge/git/handler/hook/exception/WrongBranchException.java

@@ -0,0 +1,34 @@
+package uk.ac.ic.wlgitbridge.git.handler.hook.exception;
+
+import com.google.gson.JsonElement;
+import uk.ac.ic.wlgitbridge.writelatex.api.request.push.exception.SnapshotPostException;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Created by Winston on 19/12/14.
+ */
+public class WrongBranchException extends SnapshotPostException {
+
+    private static final String[] DESCRIPTION_LINES = {
+            "You can't push any new branches.",
+            "Please use the master branch."
+    };
+
+    @Override
+    public String getMessage() {
+        return "wrong branch";
+    }
+
+    @Override
+    public List<String> getDescriptionLines() {
+        return Arrays.asList(DESCRIPTION_LINES);
+    }
+
+    @Override
+    public void fromJSON(JsonElement json) {
+
+    }
+
+}