1 files changed, 95 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/runtime/commands/CanonicalizeCommand.java b/src/main/java/com/google/devtools/build/lib/runtime/commands/CanonicalizeCommand.java
new file mode 100644
index 0000000000..0bb5a0e966
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/runtime/commands/CanonicalizeCommand.java
@@ -0,0 +1,95 @@
+// 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.lib.runtime.commands;
+
+import com.google.devtools.build.lib.events.Event;
+import com.google.devtools.build.lib.runtime.BlazeCommand;
+import com.google.devtools.build.lib.runtime.BlazeCommandUtils;
+import com.google.devtools.build.lib.runtime.BlazeRuntime;
+import com.google.devtools.build.lib.runtime.Command;
+import com.google.devtools.build.lib.util.ExitCode;
+import com.google.devtools.common.options.Converter;
+import com.google.devtools.common.options.Option;
+import com.google.devtools.common.options.OptionsBase;
+import com.google.devtools.common.options.OptionsParser;
+import com.google.devtools.common.options.OptionsParsingException;
+import com.google.devtools.common.options.OptionsProvider;
+
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * The 'blaze canonicalize-flags' command.
+ */
+@Command(name = "canonicalize-flags",
+         options = { CanonicalizeCommand.Options.class },
+         allowResidue = true,
+         mustRunInWorkspace = false,
+         shortDescription = "Canonicalizes a list of Blaze options.",
+         help = "This command canonicalizes a list of Blaze options. Don't forget to prepend '--' "
+             + "to end option parsing before the flags to canonicalize.\n"
+             + "%{options}")
+public final class CanonicalizeCommand implements BlazeCommand {
+
+  public static class CommandConverter implements Converter<String> {
+
+    @Override
+    public String convert(String input) throws OptionsParsingException {
+      if (input.equals("build")) {
+        return input;
+      } else if (input.equals("test")) {
+        return input;
+      }
+      throw new OptionsParsingException("Not a valid command: '" + input + "' (should be "
+          + getTypeDescription() + ")");
+    }
+
+    @Override
+    public String getTypeDescription() {
+      return "build or test";
+    }
+  }
+
+  public static class Options extends OptionsBase {
+
+    @Option(name = "for_command",
+            defaultValue = "build",
+            category = "misc",
+            converter = CommandConverter.class,
+            help = "The command for which the options should be canonicalized.")
+    public String forCommand;
+  }
+
+  @Override
+  public ExitCode exec(BlazeRuntime runtime, OptionsProvider options) {
+    BlazeCommand command = runtime.getCommandMap().get(
+        options.getOptions(Options.class).forCommand);
+    Collection<Class<? extends OptionsBase>> optionsClasses =
+        BlazeCommandUtils.getOptions(
+            command.getClass(), runtime.getBlazeModules(), runtime.getRuleClassProvider());
+    try {
+      List<String> result = OptionsParser.canonicalize(optionsClasses, options.getResidue());
+      for (String piece : result) {
+        runtime.getReporter().getOutErr().printOutLn(piece);
+      }
+    } catch (OptionsParsingException e) {
+      runtime.getReporter().handle(Event.error(e.getMessage()));
+      return ExitCode.COMMAND_LINE_ERROR;
+    }
+    return ExitCode.SUCCESS;
+  }
+
+  @Override
+  public void editOptions(BlazeRuntime runtime, OptionsParser optionsParser) {}
+}