pkg/front_end/lib/src/fasta/outline.dart

// Copyright (c) 2016, 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.

library fasta.outline;

import 'dart:async' show Future;

import 'dart:io' show exitCode;

import 'kernel/verifier.dart' show verifyProgram;

import 'compiler_command_line.dart' show CompilerCommandLine;

import 'compiler_context.dart' show CompilerContext;

import 'errors.dart' show InputError, inputError;

import 'kernel/kernel_target.dart' show KernelTarget;

import 'dill/dill_target.dart' show DillTarget;

import 'ticker.dart' show Ticker;

import 'translate_uri.dart' show TranslateUri;

const int iterations = const int.fromEnvironment("iterations", defaultValue: 1);

compileEntryPoint(List<String> arguments) async {
  for (int i = 0; i < iterations; i++) {
    if (i > 0) {
      print("\n");
    }
    await compile(arguments);
  }
}

outlineEntryPoint(List<String> arguments) async {
  for (int i = 0; i < iterations; i++) {
    if (i > 0) {
      print("\n");
    }
    await outline(arguments);
  }
}

Future<KernelTarget> outline(List<String> arguments) async {
  try {
    return await CompilerCommandLine.withGlobalOptions("outline", arguments,
        (CompilerContext c) async {
      if (c.options.verbose) {
        print("Building outlines for ${arguments.join(' ')}");
      }
      CompileTask task =
          new CompileTask(c, new Ticker(isVerbose: c.options.verbose));
      return await task.buildOutline(c.options.output);
    });
  } on InputError catch (e) {
    exitCode = 1;
    print(e.format());
    return null;
  }
}

Future<Uri> compile(List<String> arguments) async {
  try {
    return await CompilerCommandLine.withGlobalOptions("compile", arguments,
        (CompilerContext c) async {
      if (c.options.verbose) {
        print("Compiling directly to Kernel: ${arguments.join(' ')}");
      }
      CompileTask task =
          new CompileTask(c, new Ticker(isVerbose: c.options.verbose));
      return await task.compile();
    });
  } on InputError catch (e) {
    exitCode = 1;
    print(e.format());
    return null;
  }
}

class CompileTask {
  final CompilerContext c;
  final Ticker ticker;

  CompileTask(this.c, this.ticker);

  KernelTarget createKernelTarget(
      DillTarget dillTarget, TranslateUri uriTranslator) {
    return new KernelTarget(dillTarget, uriTranslator, c.uriToSource);
  }

  Future<KernelTarget> buildOutline([Uri output]) async {
    TranslateUri uriTranslator = await TranslateUri.parse(c.options.sdk);
    ticker.logMs("Read packages file");
    DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
    KernelTarget kernelTarget = createKernelTarget(dillTarget, uriTranslator);
    Uri platform = c.options.platform;
    if (platform != null) {
      dillTarget.read(platform);
    }
    String argument = c.options.arguments.first;
    Uri uri = Uri.base.resolve(argument);
    String path = uriTranslator.translate(uri)?.path ?? argument;
    if (path.endsWith(".dart")) {
      kernelTarget.read(uri);
    } else {
      inputError(uri, -1, "Unexpected input: $uri");
    }
    await dillTarget.writeOutline(null);
    await kernelTarget.writeOutline(output);
    if (c.options.dumpIr && output != null) {
      kernelTarget.dumpIr();
    }
    return kernelTarget;
  }

  Future<Uri> compile() async {
    KernelTarget kernelTarget = await buildOutline();
    if (exitCode != 0) return null;
    Uri uri = c.options.output;
    await kernelTarget.writeProgram(uri);
    if (c.options.dumpIr) {
      kernelTarget.dumpIr();
    }
    if (c.options.verify) {
      try {
        verifyProgram(kernelTarget.program);
        ticker.logMs("Verified program");
      } catch (e, s) {
        exitCode = 1;
        print("Verification of program failed: $e");
        if (s != null && c.options.verbose) {
          print(s);
        }
      }
    }
    return uri;
  }
}