Template parser

utils/template/temploptions.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/** General options used by the compiler. */
+TemplateOptions options;
+
+/** Extracts options from command-line arguments. */
+void parseOptions(List<String> args, var files) {
+  assert(options == null);
+  options = new TemplateOptions(args, files);
+}
+
+// TODO(sigmund): make into a generic option parser...
+class TemplateOptions {
+  /** Location of corelib and other special dart libraries. */
+  String libDir;
+
+  /* The top-level dart script to compile. */
+  String dartScript;
+
+  /** Where to place the generated code. */
+  String outfile;
+
+  // Options that modify behavior significantly
+
+  bool warningsAsErrors = false;
+  bool checkOnly = false;
+
+  // Message support
+  bool throwOnErrors = false;
+  bool throwOnWarnings = false;
+  bool throwOnFatal = false;
+  bool showInfo = false;
+  bool showWarnings = true;
+  bool useColors = true;
+
+  /**
+   * Options to be used later for passing to the generated code. These are all
+   * the arguments after the first dart script, if any.
+   */
+  List<String> childArgs;
+
+  TemplateOptions(List<String> args, var files) {
+    bool ignoreUnrecognizedFlags = false;
+    bool passedLibDir = false;
+    childArgs = [];
+
+    // Start from 2 to skip arguments representing the compiler command
+    // (node/python followed by frogsh/frog.py).
+    loop: for (int i = 2; i < args.length; i++) {
+      var arg = args[i];
+
+      switch (arg) {
+        case '--check-only':
+          checkOnly = true;
+          break;
+
+        case '--verbose':
+          showInfo = true;
+          break;
+
+        case '--suppress_warnings':
+          showWarnings = false;
+          break;
+
+        case '--warnings_as_errors':
+          warningsAsErrors = true;
+          break;
+
+        case '--throw_on_errors':
+          throwOnErrors = true;
+          break;
+
+        case '--throw_on_warnings':
+          throwOnWarnings = true;
+          break;
+
+        case '--no_colors':
+          useColors = false;
+          break;
+
+        case '--checked':
+          checkOnly = true;
+          break;
+
+        default:
+          if (!ignoreUnrecognizedFlags) {
+            print('unrecognized flag: "$arg"');
+          }
+      }
+    }
+  }
+}