Fix/browse without current file

.run/Run Plugin.run.xml

@@ -0,0 +1,24 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Run Plugin" type="GradleRunConfiguration" factoryName="Gradle">
+    <ExternalSystemSettings>
+      <option name="executionName" />
+      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+      <option name="externalSystemIdString" value="GRADLE" />
+      <option name="scriptParameters" value="" />
+      <option name="taskDescriptions">
+        <list />
+      </option>
+      <option name="taskNames">
+        <list>
+          <option value="runIde" />
+        </list>
+      </option>
+      <option name="vmOptions" />
+    </ExternalSystemSettings>
+    <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
+    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+    <DebugAllEnabled>false</DebugAllEnabled>
+    <RunAsTest>false</RunAsTest>
+    <method v="2" />
+  </configuration>
+</component>

build.gradle

@@ -1,3 +1,5 @@
+
+
 plugins {
     id 'java'
     id 'org.jetbrains.intellij' version '0.4.1'
@@ -8,8 +10,12 @@ version '0.4.4'
 
 sourceCompatibility = 1.8
 
+repositories {
+    mavenCentral()
+}
+
 dependencies {
-    testCompile group: 'junit', name: 'junit', version: '4.12'
+    testCompile group: 'junit', name: 'junit', version: '4.13.2'
 }
 
 intellij {

src/main/java/gitextensions/commands/BaseAction.java

@@ -3,8 +3,10 @@
 import com.google.common.base.Strings;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.DataConstants;
 import com.intellij.openapi.actionSystem.PlatformDataKeys;
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.Messages;
 import com.intellij.openapi.vfs.VirtualFile;
 import gitextensions.GitExtensionsService;
@@ -29,8 +31,7 @@ public BaseAction(@NotNull String command) {
     @Override
     public void actionPerformed(@NotNull AnActionEvent e) {
         try {
-            VirtualFile file = e.getData(PlatformDataKeys.VIRTUAL_FILE);
-            String fileName = getFileName(file);
+            String fileName = getFileNameFromEvent(e);
 
             if (fileName != null) {
                 GitExtensionsService service = ApplicationManager.getApplication().getService(GitExtensionsService.class);
@@ -57,6 +58,12 @@ public void actionPerformed(@NotNull AnActionEvent e) {
         }
     }
 
+    @Nullable
+    protected String getFileNameFromEvent(@NotNull AnActionEvent e) {
+        VirtualFile file = e.getData(PlatformDataKeys.VIRTUAL_FILE);
+        return getFileName(file);
+    }
+
     protected String getFileName(@Nullable VirtualFile file) {
         return file != null ? file.getCanonicalPath() : null;
     }

src/main/java/gitextensions/commands/Browse.java

@@ -1,7 +1,26 @@
 package gitextensions.commands;
 
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.actionSystem.PlatformDataKeys;
+import com.intellij.openapi.project.Project;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
 public class Browse extends BaseAction {
     public Browse() {
         super(Commands.BROWSE);
     }
+
+    @Nullable
+    @Override
+    protected String getFileNameFromEvent(@NotNull AnActionEvent e) {
+        String result = super.getFileNameFromEvent(e);
+        if (result == null) {
+            Project project = e.getData(PlatformDataKeys.PROJECT);
+            if (project != null) {
+                result = project.getBasePath();
+            }
+        }
+        return result;
+    }
 }