[dart2js] Update Dart2jsStage definitions and CLI surface area.

Today to invoke Dart2js with sequential actions there are 2 ways to specify the stage from the command line. By specifying a `write-<stage-data>=<some-uri>` or by using `stage=<some-stage>`. Internally we use the former via a similar (but separate) concept to Dart2jsStage. The goal here is to consolidate all these different entry points.

The new CLI works as follows:
- To run the compiler in full you can:
  - Pass no additional flags as before
  - Specify 'stage=all'
  - 'dump-info-all' runs the full compilation from scratch but includes
    dump info.
- To run the compiler in sequential mode you specify a stage:
  - Each stage has its own name passed to the '--stage' flag.
  - All the intermediate data URIs can be passed to every stage and only
    the relevant ones are used for any given stage. If no URI is passed
    then a default URI is used.
  - 'dump-info' is now its own stage. Partial dump info data is
    always included in the emit-js and codegen-emit-js steps.
  - 'cfe-only' flag is maintained for compatibility with Flutter CLI.


Change-Id: I67965d7708688a85c866d8abef3716bee23a083f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/358740
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nate Biggs <natebiggs@google.com>
20 files changed
tree: 21168f307f085914a6280d31fed11770cf2bd8b8
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. sdk.code-workspace
  34. sdk_args.gni
  35. sdk_packages.yaml
  36. SECURITY.md
  37. WATCHLISTS
README.md

Dart

An approachable, portable, and productive language for high-quality apps on any platform

Dart is:

  • Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.

  • Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit dart.dev to learn more about the language, tools, and to find codelabs.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents on our wiki.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.