Add main to print list of rules.

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MOS_MIGRATED_REVID=94762936

1 files changed, 45 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/docgen/ListRuleMain.java b/src/main/java/com/google/devtools/build/docgen/ListRuleMain.java
new file mode 100644
index 0000000000..4d5de006cf
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/docgen/ListRuleMain.java
@@ -0,0 +1,45 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// 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.devtools.build.docgen;
+
+import com.google.devtools.build.lib.Constants;
+import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider;
+import com.google.devtools.build.lib.packages.RuleClass;
+import com.google.devtools.build.lib.packages.RuleClassProvider;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Map;
+
+/**
+ * Prints out list of known rules.
+ */
+public class ListRuleMain {
+
+  private static ConfiguredRuleClassProvider createRuleClassProvider()
+      throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException,
+          IllegalAccessException {
+    Class<?> providerClass = Class.forName(Constants.MAIN_RULE_CLASS_PROVIDER);
+    Method createMethod = providerClass.getMethod("create");
+    return (ConfiguredRuleClassProvider) createMethod.invoke(null);
+  }
+
+  public static void main(String[] args) throws Exception {
+    RuleClassProvider provider = createRuleClassProvider();
+    Map<String, RuleClass> rcMap = provider.getRuleClassMap();
+    for (String name : rcMap.keySet()) {
+      System.out.println(name);
+    }
+  }
+}