Merge branch 'stable-3.0' into stable-3.1

Change-Id: I9807c516b1a0d9c8762e77300673cb831b549b1d
diff --git a/.bazelversion b/.bazelversion
index 7ec1d6d..ccbccc3 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-2.1.0
+2.2.0
diff --git a/src/main/java/com/ericsson/gerrit/plugins/goimport/GoImportFilter.java b/src/main/java/com/ericsson/gerrit/plugins/goimport/GoImportFilter.java
index 697938f..f6252c9 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/goimport/GoImportFilter.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/goimport/GoImportFilter.java
@@ -16,15 +16,21 @@
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Strings;
+import com.google.gerrit.entities.BranchNameKey;
 import com.google.gerrit.entities.Project;
+import com.google.gerrit.entities.RefNames;
 import com.google.gerrit.httpd.AllRequestFilter;
 import com.google.gerrit.httpd.HtmlDomUtil;
+import com.google.gerrit.server.AnonymousUser;
 import com.google.gerrit.server.config.CanonicalWebUrl;
+import com.google.gerrit.server.permissions.PermissionBackend;
+import com.google.gerrit.server.permissions.RefPermission;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.project.ProjectState;
 import com.google.gerrit.util.http.CacheHeaders;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
+import com.google.inject.Provider;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.net.URI;
@@ -74,13 +80,21 @@
           + "</html>";
 
   private static final Pattern AUTHENTICATED_REQ = Pattern.compile("^/a/.*");
+  private final Provider<AnonymousUser> anonProvider;
+  private final PermissionBackend permissions;
   private final ProjectCache projectCache;
   final String webUrl;
   final String projectPrefix;
 
   @Inject
-  GoImportFilter(ProjectCache projectCache, @CanonicalWebUrl String webUrl)
+  GoImportFilter(
+      Provider<AnonymousUser> anonProvider,
+      PermissionBackend permissions,
+      ProjectCache projectCache,
+      @CanonicalWebUrl String webUrl)
       throws URISyntaxException {
+    this.anonProvider = anonProvider;
+    this.permissions = permissions;
     this.projectCache = projectCache;
     this.webUrl = webUrl.replaceFirst("/?$", "/");
     this.projectPrefix = generateProjectPrefix();
@@ -160,9 +174,22 @@
         + (authenticated ? "a/" : "")
         + projectName
         + " git "
-        + webUrl
-        + "a/"
-        + projectName;
+	+ getRepoRoot(projectName, authenticated);
+  }
+
+  private String getRepoRoot(String projectName, boolean authenticated) {
+    if (allowsAnonymousAccess(projectName) && !authenticated) {
+      return webUrl + projectName;
+    }
+    return webUrl + "a/" + projectName;
+  }
+
+  private boolean allowsAnonymousAccess(String projectName) {
+    AnonymousUser anonymous = anonProvider.get();
+    BranchNameKey heads =
+        BranchNameKey.create(Project.nameKey(projectName), RefNames.REFS_HEADS);
+
+    return permissions.user(anonymous).ref(heads).testOrFalse(RefPermission.READ);
   }
 
   private boolean projectExists(String projectName) {
diff --git a/src/test/java/com/ericsson/gerrit/plugins/goimport/GoImportFilterTest.java b/src/test/java/com/ericsson/gerrit/plugins/goimport/GoImportFilterTest.java
index c65fb5e..4bc2978 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/goimport/GoImportFilterTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/goimport/GoImportFilterTest.java
@@ -27,6 +27,7 @@
 import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.AnonymousUser;
 import com.google.gerrit.server.permissions.PermissionBackend;
+import com.google.gerrit.server.permissions.RefPermission;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.project.ProjectState;
 import com.google.inject.Provider;
@@ -51,6 +52,8 @@
   private static final String CONTENT_FORMAT = "%1$s/%3$s git %2$s/%3$s";
   private static final String CONTENT =
       String.format(CONTENT_FORMAT, PROD_FQDN, auth(PROD_URL), PROJECT_NAME);
+  private static final String ANON_CONTENT =
+      String.format(CONTENT_FORMAT, PROD_FQDN, PROD_URL, PROJECT_NAME);
   private static final String AUTH_CONTENT =
       String.format(CONTENT_FORMAT, auth(PROD_FQDN), auth(PROD_URL), PROJECT_NAME);
 
@@ -59,10 +62,13 @@
     return baseUrl + "/a";
   }
 
-  private static byte[] response200(boolean authenticated) {
-    return authenticated
-        ? PAGE_200.replace(CONTENT_PLH, AUTH_CONTENT).getBytes()
-        : PAGE_200.replace(CONTENT_PLH, CONTENT).getBytes();
+  private static byte[] response200(boolean allowAnon, boolean authenticated) {
+    if (authenticated) {
+      return PAGE_200.replace(CONTENT_PLH, AUTH_CONTENT).getBytes();
+    } else if (allowAnon) {
+      return PAGE_200.replace(CONTENT_PLH, ANON_CONTENT).getBytes();
+    }
+    return PAGE_200.replace(CONTENT_PLH, CONTENT).getBytes();
   }
 
   private GoImportFilter unitUnderTest;
@@ -81,23 +87,31 @@
 
   @Before
   public void setUp() throws Exception {
-    unitUnderTest = new GoImportFilter(mockProjectCache, PROD_URL);
+    unitUnderTest = new GoImportFilter(mockAnonProvider, mockPerms, mockProjectCache, PROD_URL);
     assertThat(unitUnderTest).isNotNull();
     when(mockResponse.getOutputStream()).thenReturn(mockOutputStream);
+
+    when(mockAnonProvider.get()).thenReturn(mockAnon);
+    when(mockPerms.user(mockAnon)).thenReturn(mockPermsWithUser);
+    when(mockPermsWithUser.ref(any())).thenReturn(mockPermsForRef);
   }
 
   @Test
   public void testConstructor() throws Exception {
     assertThat(unitUnderTest.webUrl.endsWith("/")).isTrue();
     unitUnderTest =
-        new GoImportFilter(mockProjectCache, "http://gerrit-review.googlesource.com:8080/");
+        new GoImportFilter(
+            mockAnonProvider,
+            mockPerms,
+            mockProjectCache,
+            "http://gerrit-review.googlesource.com:8080/");
     assertThat(unitUnderTest.webUrl.endsWith("/")).isTrue();
     assertThat(unitUnderTest.projectPrefix).isNotNull();
   }
 
   @Test(expected = URISyntaxException.class)
   public void testConstructorWithURISyntaxException() throws Exception {
-    unitUnderTest = new GoImportFilter(mockProjectCache, "\\\\");
+    unitUnderTest = new GoImportFilter(mockAnonProvider, mockPerms, mockProjectCache, "\\\\");
   }
 
   @Test
@@ -127,11 +141,13 @@
     when(mockRequest.getServletPath()).thenReturn("/" + PROJECT_NAME);
     when(mockRequest.getParameter("go-get")).thenReturn("1");
     when(mockProjectCache.get(Project.nameKey(PROJECT_NAME))).thenReturn(mockProjectState);
+    when(mockPermsForRef.testOrFalse(RefPermission.READ)).thenReturn(false);
     unitUnderTest.doFilter(mockRequest, mockResponse, mockChain);
-    verify(mockOutputStream, times(1)).write(response200(false));
+    verify(mockOutputStream, times(1)).write(response200(false, false));
     verify(mockChain, times(0)).doFilter(mockRequest, mockResponse);
     verify(mockProjectCache, times(1)).get(any(Project.NameKey.class));
     verify(mockResponse, times(1)).setStatus(200);
+    verify(mockPermsForRef, times(1)).testOrFalse(RefPermission.READ);
   }
 
   @Test
@@ -139,11 +155,13 @@
     when(mockRequest.getServletPath()).thenReturn("/a/" + PROJECT_NAME);
     when(mockRequest.getParameter("go-get")).thenReturn("1");
     when(mockProjectCache.get(Project.nameKey(PROJECT_NAME))).thenReturn(mockProjectState);
+    when(mockPermsForRef.testOrFalse(RefPermission.READ)).thenReturn(false);
     unitUnderTest.doFilter(mockRequest, mockResponse, mockChain);
-    verify(mockOutputStream, times(1)).write(response200(true));
+    verify(mockOutputStream, times(1)).write(response200(false, true));
     verify(mockChain, times(0)).doFilter(mockRequest, mockResponse);
     verify(mockProjectCache, times(1)).get(any(Project.NameKey.class));
     verify(mockResponse, times(1)).setStatus(200);
+    verify(mockPermsForRef, times(1)).testOrFalse(RefPermission.READ);
   }
 
   @Test
@@ -151,8 +169,9 @@
     when(mockRequest.getServletPath()).thenReturn("/" + PROJECT_NAME + "/my/package");
     when(mockRequest.getParameter("go-get")).thenReturn("1");
     when(mockProjectCache.get(Project.nameKey(PROJECT_NAME))).thenReturn(mockProjectState);
+    when(mockPermsForRef.testOrFalse(RefPermission.READ)).thenReturn(false);
     unitUnderTest.doFilter(mockRequest, mockResponse, mockChain);
-    verify(mockOutputStream, times(1)).write(response200(false));
+    verify(mockOutputStream, times(1)).write(response200(false, false));
     verify(mockChain, times(0)).doFilter(mockRequest, mockResponse);
     verify(mockProjectCache, times(3)).get(any(Project.NameKey.class));
     verify(mockResponse, times(1)).setStatus(200);
@@ -163,12 +182,13 @@
     when(mockRequest.getServletPath()).thenReturn("/projectName");
     when(mockRequest.getParameter("go-get")).thenReturn("1");
     when(mockProjectCache.get(Project.nameKey("projectName"))).thenReturn(mockProjectState);
-    when(mockProjectCache.get(Project.nameKey("projectName"))).thenReturn(mockProjectState);
+    when(mockPermsForRef.testOrFalse(RefPermission.READ)).thenReturn(true);
     unitUnderTest.doFilter(mockRequest, mockResponse, mockChain);
-    verify(mockOutputStream, times(1)).write(response200(false));
+    verify(mockOutputStream, times(1)).write(response200(true, false));
     verify(mockChain, times(0)).doFilter(mockRequest, mockResponse);
     verify(mockProjectCache, times(1)).get(any(Project.NameKey.class));
     verify(mockResponse, times(1)).setStatus(200);
+    verify(mockPermsForRef, times(1)).testOrFalse(RefPermission.READ);
   }
 
   @Test