# HG changeset patch
# User Vladimir Kvashin <vkvashin@netbeans.org>
# Date 1478200074 -10800
# Branch release82
# Node ID 21f6eabd4aa4d1b0aba480a306f326afa4fa05e1
# Parent  404ffed5292eaa022b975ac94ffcc04a8b46d9e9
Introducing VCSForbiddenFolderProvider

diff -r 404ffed5292e -r 21f6eabd4aa4 versioning.core/src/org/netbeans/modules/versioning/core/Utils.java
--- a/versioning.core/src/org/netbeans/modules/versioning/core/Utils.java	Wed Nov 02 23:08:27 2016 +0300
+++ b/versioning.core/src/org/netbeans/modules/versioning/core/Utils.java	Thu Nov 03 22:07:54 2016 +0300
@@ -65,6 +65,7 @@
 import java.util.prefs.Preferences;
 import org.netbeans.modules.versioning.core.api.VCSFileProxy;
 import org.netbeans.modules.versioning.core.api.VersioningSupport;
+import org.netbeans.modules.versioning.core.spi.VCSForbiddenFolderProvider;
 import org.openide.filesystems.FileSystem;
 import org.openide.filesystems.URLMapper;
 import org.openide.modules.Places;
@@ -345,6 +346,12 @@
     }
 
     public static boolean isForbiddenFolder (VCSFileProxy folder) {
+        Collection<? extends VCSForbiddenFolderProvider> forbiddenFolderProviders = Lookup.getDefault().lookupAll(VCSForbiddenFolderProvider.class);
+        for (VCSForbiddenFolderProvider provider : forbiddenFolderProviders) {
+            if (provider.isForbiddenFolder(folder)) {
+                return true;
+            }
+        }
         return forbiddenFolders.contains(folder.getPath());
     }
 
diff -r 404ffed5292e -r 21f6eabd4aa4 versioning.core/src/org/netbeans/modules/versioning/core/spi/VCSForbiddenFolderProvider.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/versioning.core/src/org/netbeans/modules/versioning/core/spi/VCSForbiddenFolderProvider.java	Thu Nov 03 22:07:54 2016 +0300
@@ -0,0 +1,62 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved.
+ *
+ * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
+ * Other names may be trademarks of their respective owners.
+ *
+ * The contents of this file are subject to the terms of either the GNU
+ * General Public License Version 2 only ("GPL") or the Common
+ * Development and Distribution License("CDDL") (collectively, the
+ * "License"). You may not use this file except in compliance with the
+ * License. You can obtain a copy of the License at
+ * http://www.netbeans.org/cddl-gplv2.html
+ * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
+ * specific language governing permissions and limitations under the
+ * License.  When distributing the software, include this License Header
+ * Notice in each file and include the License file at
+ * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the GPL Version 2 section of the License file that
+ * accompanied this code. If applicable, add the following below the
+ * License Header, with the fields enclosed by brackets [] replaced by
+ * your own identifying information:
+ * "Portions Copyrighted [year] [name of copyright owner]"
+ *
+ * If you wish your version of this file to be governed by only the CDDL
+ * or only the GPL Version 2, indicate your decision by adding
+ * "[Contributor] elects to include this software in this distribution
+ * under the [CDDL or GPL Version 2] license." If you do not indicate a
+ * single choice of license, a recipient has the option to distribute
+ * your version of this file under either the CDDL, the GPL Version 2 or
+ * to extend the choice of license to its licensees as provided above.
+ * However, if you add GPL Version 2 code and therefore, elected the GPL
+ * Version 2 license, then the option applies only if the new code is
+ * made subject to such option by the copyright holder.
+ *
+ * Contributor(s):
+ */
+package org.netbeans.modules.versioning.core.spi;
+
+import org.netbeans.modules.versioning.core.api.VCSFileProxy;
+
+
+public interface VCSForbiddenFolderProvider {
+    /**
+     * Some folders are special and versioning should not look for metadata in
+     * them. Folders like /net with automount enabled may take a long time to
+     * answer I/O on their children, so
+     * <code>VCSFileProxy.exists("/net/.git")</code> will freeze until it timeouts.
+     * This method is called from org.netbeans.modules.versioning.core.util.Utils.isForbiddenFolder()
+     * This does not mean however that whole subtree should be excluded from version control, 
+     * only that you should not look for the metadata directly in this folder.
+     * Returns <code>true</code> if the given folder is among such folders.
+     * @author vkvashin
+     * @param folder a folder to query
+     * @return <code>true</code> if the given folder should be skipped when
+     * searching for metadata.
+     * @since 1.19
+     */
+    boolean isForbiddenFolder (VCSFileProxy folder);
+}