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// Copyright (c) 2013, 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.
/// Generates a wrapper around dart2js to ship with the SDK.
///
/// The only reason to create this wrapper is to be able to embed the sdk
/// version information into the compiler.
import 'dart:io';
import 'dart:async';
Future<String> getVersion(var rootPath) {
var suffix = Platform.operatingSystem == 'windows' ? '.exe' : '';
var printVersionScript = rootPath.resolve("tools/make_version.py");
return Process.run(
"python$suffix", [printVersionScript.toFilePath(), "--quiet"])
.then((result) {
if (result.exitCode != 0) {
throw "Could not generate version";
}
return result.stdout.trim();
});
}
Future<String> getDart2jsSnapshotGenerationFile(var rootPath) {
return getVersion(rootPath).then((version) {
var snapshotGenerationText = """
import 'package:compiler/src/dart2js.dart' as dart2jsMain;
void main(List<String> arguments) {
dart2jsMain.BUILD_ID = "$version";
dart2jsMain.main(arguments);
}
""";
return snapshotGenerationText;
});
}
/**
* Takes the following arguments:
* --output_dir=val The full path to the output_dir.
* --dart2js_main=val The path to the dart2js main script relative to root.
*/
void main(List<String> arguments) {
var validArguments = ["--output_dir", "--dart2js_main"];
var args = {};
for (var argument in arguments) {
var argumentSplit = argument.split("=");
if (argumentSplit.length != 2) throw "Invalid argument $argument, no =";
if (!validArguments.contains(argumentSplit[0])) {
throw "Invalid argument $argument";
}
args[argumentSplit[0].substring(2)] = argumentSplit[1];
}
if (!args.containsKey("output_dir")) throw "Please specify output_dir";
var scriptFile = Uri.base.resolveUri(Platform.script);
var path = scriptFile.resolve(".");
var rootPath = path.resolve("../..");
getDart2jsSnapshotGenerationFile(rootPath).then((result) {
var wrapper = "${args['output_dir']}/dart2js.dart";
new File(wrapper).writeAsStringSync(result);
});
}