Extract global commentlink config into a Provider

Change-Id: I4f28bff33a0955202767e7a9ea90e256f9a66da7

gerrit-server/src/main/java/com/google/gerrit/server/project/CommentLinkProvider.java

@@ -0,0 +1,47 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.project;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Lists;
+import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.gerrit.server.git.ProjectConfig;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+
+import org.eclipse.jgit.lib.Config;
+
+import java.util.List;
+import java.util.Set;
+
+public class CommentLinkProvider implements Provider<List<CommentLinkInfo>> {
+  private final Config cfg;
+
+  @Inject
+  CommentLinkProvider(@GerritServerConfig Config cfg) {
+    this.cfg = cfg;
+  }
+
+  @Override
+  public List<CommentLinkInfo> get() {
+    Set<String> subsections = cfg.getSubsections(ProjectConfig.COMMENTLINK);
+    List<CommentLinkInfo> cls =
+        Lists.newArrayListWithCapacity(subsections.size());
+    for (String name : subsections) {
+      cls.add(ProjectConfig.buildCommentLink(cfg, name));
+    }
+    return ImmutableList.copyOf(cls);
+  }
+}