sdk/pkg/dev_compiler/tool/build_pkgs.dart

#!/usr/bin/env dart
import 'dart:async';
import 'dart:io';

import 'package:front_end/compilation_message.dart';
import 'package:front_end/compiler_options.dart';
import 'package:front_end/summary_generator.dart';
import 'package:path/path.dart' as p;

import 'package:dev_compiler/src/analyzer/command.dart' as analyzer;
import 'package:dev_compiler/src/kernel/target.dart';

final String scriptDirectory = p.dirname(p.fromUri(Platform.script));

/// The directory that output is written to.
///
/// The DDC kernel SDK should be directly in this directory. The resulting
/// packages will be placed in a "pkg" subdirectory of this.
String outputDirectory;

String get pkgDirectory => p.join(outputDirectory, "pkg");

/// Compiles the packages that the DDC tests use to JS into the given output
/// directory. Usage:
///
///     dart build_pkgs.dart <output_dir> [travis]
///
/// If "travis" is passed, builds the all of the modules tested on Travis.
/// Otherwise, only builds the modules needed by the tests.
Future main(List<String> arguments) async {
  var isTravis = arguments.isNotEmpty && arguments.last == "travis";
  if (isTravis) {
    arguments = arguments.sublist(0, arguments.length - 1);
  }

  if (arguments.length != 1) {
    print("Usage: dart build_pkgs.dart <output_dir> [travis]");
    exit(1);
  }

  outputDirectory = arguments[0];
  new Directory(pkgDirectory).createSync(recursive: true);

  // Build leaf packages. These have no other package dependencies.

  // Under pkg.
  await compileModule('async_helper');
  await compileModule('expect', libs: ['minitest']);
  await compileModule('js', libs: ['js_util']);
  await compileModule('meta');
  if (isTravis) {
    await compileModule('microlytics', libs: ['html_channels']);
    await compileModule('typed_mock');
  }

  // Under third_party/pkg.
  await compileModule('collection');
  await compileModule('path');
  if (isTravis) {
    await compileModule('args', libs: ['command_runner']);
    await compileModule('charcode');
    await compileModule('fixnum');
    await compileModule('logging');
    await compileModule('markdown');
    await compileModule('mime');
    await compileModule('plugin', libs: ['manager']);
    await compileModule('typed_data');
    await compileModule('usage');
    await compileModule('utf');
  }

  // Composite packages with dependencies.
  await compileModule('stack_trace', deps: ['path']);
  await compileModule('matcher', deps: ['stack_trace']);
  if (isTravis) {
    await compileModule('async', deps: ['collection']);
  }

  if (!isTravis) {
    await compileModule('unittest', deps: [
      'matcher',
      'path',
      'stack_trace'
    ], libs: [
      'html_config',
      'html_individual_config',
      'html_enhanced_config'
    ]);
  }
}

/// Compiles a [module] with a single matching ".dart" library and additional
/// [libs] and [deps] on other modules.
Future compileModule(String module,
    {List<String> libs, List<String> deps}) async {
  compileModuleUsingAnalyzer(module, libs, deps);
  await compileKernelSummary(module, libs, deps);
}

void compileModuleUsingAnalyzer(
    String module, List<String> libraries, List<String> dependencies) {
  var sdkSummary = p.join(scriptDirectory, "../lib/sdk/ddc_sdk.sum");
  var args = ['--dart-sdk-summary=$sdkSummary', '-o${pkgDirectory}/$module.js'];

  // There is always a library that matches the module.
  args.add('package:$module/$module.dart');

  // Add any additional libraries.
  if (libraries != null) {
    for (var lib in libraries) {
      args.add('package:$module/$lib.dart');
    }
  }

  // Add summaries for any modules this depends on.
  if (dependencies != null) {
    for (var dep in dependencies) {
      args.add('-s${pkgDirectory}/$dep.sum');
    }
  }

  // TODO(rnystrom): Hack. DDC has its own forked copy of async_helper that
  // has a couple of differences from pkg/async_helper. We should unfork them,
  // but I'm not sure how they'll affect the other non-DDC tests. For now, just
  // use ours.
  if (module == 'async_helper') {
    args.add('--url-mapping=package:async_helper/async_helper.dart,' +
        p.join(scriptDirectory, "../test/codegen/async_helper.dart"));
  }

  var exitCode = analyzer.compile(args);
  if (exitCode != 0) exit(exitCode);
}

Future compileKernelSummary(
    String module, List<String> libraries, List<String> dependencies) async {
  var succeeded = true;

  void errorHandler(CompilationMessage error) {
    if (error.severity == Severity.error) succeeded = false;
  }

  var sdk = p.toUri(p.join(outputDirectory, "ddc_sdk.dill"));
  print(sdk);
  var options = new CompilerOptions()
    ..sdkSummary = sdk
    ..packagesFileUri = _uriInRepo(".packages")
    ..strongMode = true
    ..debugDump = true
    ..chaseDependencies = true
    ..onError = errorHandler
    ..reportMessages = true
    ..target = new DevCompilerTarget();

  var inputs = <Uri>[];

  if (module == "async_helper") {
    // TODO(rnystrom): Hack. DDC has its own forked copy of async_helper that
    // has a couple of differences from pkg/async_helper. We should unfork them,
    // but I'm not sure how they'll affect the other non-DDC tests. For now,
    // just use ours.
    inputs.add(_uriInRepo("pkg/dev_compiler/test/codegen/async_helper.dart"));
  } else {
    // There is always a library that matches the module.
    inputs.add(Uri.parse("package:$module/$module.dart"));

    // Add any other libraries too.
    if (libraries != null) {
      for (var lib in libraries) {
        inputs.add(Uri.parse("package:$module/$lib.dart"));
      }
    }
  }

  // Add summaries for any modules this depends on.
  if (dependencies != null) {
    var uris = <Uri>[];

    for (var dep in dependencies) {
      uris.add(p.toUri(p.absolute(p.join(pkgDirectory, "$dep.dill"))));
    }

    options.inputSummaries = uris;
  }

  // Compile the summary.
  var bytes = await summaryFor(inputs, options);
  var dillFile = new File(p.join(pkgDirectory, "$module.dill"));
  if (succeeded) {
    dillFile.writeAsBytesSync(bytes);
  } else {
    // Don't leave the previous version of the file on failure.
    if (dillFile.existsSync()) dillFile.deleteSync();

    stderr.writeln("Could not generate kernel summary for $module.");
    exit(1);
  }
}

Uri _uriInRepo(String pathInRepo) {
  // Walk up to repo root.
  var result = p.join(scriptDirectory, "../../../");
  result = p.join(result, pathInRepo);
  return p.toUri(p.absolute(p.normalize(result)));
}