Roll Observatory packages and add a roll script

packages/intl/tool/generate_locale_data_files.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.
+
+/**
+ * A utility program to take locale data represented as a Dart map whose keys
+ * are locale names and write it into individual JSON files named by locale.
+ * This should be run any time the locale data changes.
+ *
+ * The files are written under "data/dates", in two subdirectories, "symbols"
+ * and "patterns". In "data/dates" it will also generate "locale_list.dart",
+ * which is sourced by the date_symbol_data... files.
+ */
+
+import '../lib/date_symbol_data_local.dart';
+import '../lib/date_time_patterns.dart';
+import '../lib/intl.dart';
+import 'dart:convert';
+import 'dart:io';
+import '../test/data_directory.dart';
+import 'package:path/path.dart' as path;
+
+main() {
+  initializeDateFormatting("en_IGNORED", null);
+  writeSymbolData();
+  writePatternData();
+  writeLocaleList();
+}
+
+void writeLocaleList() {
+  var file = new File(path.join(dataDirectory, 'locale_list.dart'));
+  var output = file.openWrite();
+  output.write(
+      '// Copyright (c) 2012, the Dart project authors.  Please see the '
+      'AUTHORS file\n// for details. All rights reserved. Use of this source'
+      'code is governed by a\n// BSD-style license that can be found in the'
+      ' LICENSE file.\n\n'
+      '/// Hard-coded list of all available locales for dates.\n');
+  output.write('final availableLocalesForDateFormatting = const [');
+  List<String> allLocales = DateFormat.allLocalesWithSymbols();
+  allLocales.forEach((locale) {
+    output.write('"$locale"');
+    if (locale == allLocales.last) {
+      output.write('];');
+    } else {
+      output.write(',\n    ');
+    }
+  });
+  output.close();
+}
+
+void writeSymbolData() {
+  dateTimeSymbolMap()
+      .forEach((locale, symbols) => writeSymbols(locale, symbols));
+}
+
+void writePatternData() {
+  dateTimePatternMap()
+      .forEach((locale, patterns) => writePatterns(locale, patterns));
+}
+
+void writeSymbols(locale, symbols) {
+  var file = new File(path.join(dataDirectory, 'symbols', '${locale}.json'));
+  var output = file.openWrite();
+  writeToJSON(symbols, output);
+  output.close();
+}
+
+void writePatterns(locale, patterns) {
+  var file = new File(path.join(dataDirectory, 'patterns', '${locale}.json'));
+  file.openWrite()
+    ..write(JSON.encode(patterns))
+    ..close();
+}
+
+void writeToJSON(dynamic data, IOSink out) {
+  out.write(JSON.encode(data.serializeToMap()));
+}