build_web_compilers

• Allow the compiler to choose the default for the native null assertions option when one is not explicitly provided.

• Add support for dart:js_interop.

• Require Dart 3.0.
  • Drop support for unsound null safety.
  • Drop support for null asserts (irrelevant with sound null safety).
• Mention JSON formatting in error message about dart2js args.

• Migrate off deprecated analyzer apis.
• Update min sdk constraint to 2.18.0.
• Expand the pubspec description.

• Allow the latest package:analyzer.

• Use a standalone process to compile the ddc sdk.js file.

• Use dart compile js instead of running dart2js from its sdk snapshot.

• Allow analyzer 4.x.

• Allow the latest analyzer.

• Fix enable-experiment flag support for dartdevc to also pass experiment flags to dartdevc as well as kernel.
• Add deprecation warning for the old experiments config.
• Update pub run references to dart run.
• Fix doctor command warnings for this package.

• Allow analyzer version 2.x.x.

• Add the emit-debug-symbols option for the build_web_compilers:ddc builder. The debug symbols output is used by the debugger in webdev for variable inspection. This setting is disabled by default but can be enabled by setting it to true globally:

global_options:
  build_web_compilers:ddc:
    options:
      emit-debug-symbols: true

• Update min SDK constraint to 2.14.0-216.0.dev

• Migrate to null safety.
• Update to the latest build_modules.
• Drop support for skipPlatformCheckPackages.

• Update to build 2.x.
• Update to scratch_space 1.x.

• Update analyzer to 1.x.
• Update glob to 2.x.

• Allow the null safety pre-release of bazel_worker.

• Allow the null safety pre-release of logging.

• Clarify terminology: refer to .dart_tool/build/generated as the "artifact
  tree", and the normal output location as the "package path".
• Reduce logged compile progress output for non-interactive builds, for example
  presubmits.
• In serve and daemon modes, source files not involved in the build are no
  longer cached on read. They are re-read when requested.
• Bug fix: make post-process output behavior match normal outputs: by default,
  rebuild if deleted or incorrect. Follow --keep-modified-outputs and
  --only-check.
• Bug fix: in incremental builds, detect and delete conflicting outputs in the
  source directory rather than treating them as sources, which could cause
  builder dependency cycles and hangs; fix #5079.
• Bug fix: restrict incompatible build output deletion to output packages; do
  not attempt to delete files in dependency packages.
• Bug fix: do not invalidate retained package path outputs when conflicting
  artifact tree files appear; avoid unnecessary build step reruns.

• New default output behavior: always fix incorrect generated files. For
  example: if you "dart run build_runner build", modify a generated file,
  then build again, it will be fixed, undoing your modifications.
• New option, --keep-modified-outputs. Use this to get the old output
  behavior: manual modifications to generated files are kept. They will be
  overwritten if a build is triggered due to an input file change, a
  configuration change or dart run build_runner clean.
• New option, --only-check, for use in continuous builds and tests. With this
  option build_runner writes nothing, but builds and compares with the files
  already on disk. If there is any difference between disk and expected output
  then the differences are logged and the build fails.
• Allow package_config 3.0.0.

• Allow the latest analyzer version 0.41.x.

• Fix stack trace mapping for sound mode DDC tests and dart2js apps.

• Add native_null_asserts boolean option to the build_web_compilers:entrypoint builder. This is disabled by default but will be enabled by default in a later release.

• Fix parsing of environment config for DDC when using a bool or numeric value.
• Add sound_null_safety and null_assertions boolean options to the build_web_compilers|entrypoint builder.

• Require build_modules version ^3.0.0.

• Support sound null safety in ddc/dart2js, based on the standard entrypoint detection (enable null safety if the entrypoint opts in).
• Update dart2js support to enable experiments if provided, and use a multi-root scheme for non-package uris.
• Require build version >=1.5.0.

• Fix stripping scratch paths in metadata.

• Add the generate-full-dill option for the build_web_compilers:ddc builder. The full dill output is used by expression evaluation service in webdev for expression evaluation feature. This setting is disabled by default but can be enabled by setting it to true globally:

global_options:
  build_web_compilers:ddc:
    options:
      generate-full-dill: true

• Update build_web_compilers|ddc builder to produce a .metadata file.
• Update build_web_compilers|entrypoint builder to produce a .ddc_merged_metadata file which consists of new line separated .metadata content produced by DDC.
• Migrate off of deprecated analyzer apis.
• Allow the latest analyzer version 0.40.x.

• Deprecated support for the experiments configuration in favor of the general mechanism exposed by the build package(exposed through the --enable-experiment flag to match other Dart tools).

• Pass the package_config.json file when compiling with ddc/dart2js instead of the .packages file.

• Add support for enabling experiments through the experiments option on the build_web_compilers|ddc builder. This must be configured globally.
  • This is a list of experiment names, which translates into --enable-experiment=<name> arguments.

• Enable asserts in dev mode with dart2js by default.

• Fix a bug with hot restart, #2586.

• Allow analyzer version 0.39.x.

• Added an environment option to the DevCompilerBuilder.
  • This can be configured using the environment option of the build_web_compilers|ddc builder.
  • The expected value is a Map<String, String> and is equivalent to providing -D<key>=<value> command line arguments.
  • This option should only be set globally, and will throw if it ever recieves two different values. This is to ensure all modules are compiled with the same environment.

• Enforce builder application ordering between the SDK JS copy builder and the DDC entrypoint builder.

Fix the skipPlatformCheck option which was accidentally doing the opposite of what it claimed.

• Use the kernel version of dart_sdk.js rather than the analyzer version.

Add an option to globally skip the platform checks instead of only skipping them for a set of allowed packages.

Republish of 2.5.0 with the proper min sdk contraint.

Bug fix for issue #2464

Ignore the trackUnusedInputs option that was added in 2.5.0.

This option will be respected again in the next release which will have the proper minimum sdk constraint.

Add support for dependency pruning to the DevCompilerBuilder. This should greatly improve the invalidation semantics for builds, meaning that less code will be recompiled for each edit you make.

This is enabled by default when using build_runner, and can be disabled using the track-unused-inputs: false option if you run into issues, so in your build.yaml it would look like this:

targets:
  $default:
    build_web_compilers:ddc:
      options:
        track-unused-inputs: false

When using the builder programatically it is disabled by default and can be enabled by passing trackUnusedInputs: true to the DevCompilerBuilder constructor.

Make the required assets for DDC applications configurable in the bootstrapDdc method instead of hard coded. This allows custom integrations like flutter web to not require the same assets, or require additional custom assets.

New Feature: Better --build-filter support for building a single test.

You can now build a basic app or test in isolation by only requesting the *.dart.js file using a build filter, for example adding this argument to any build_runner command would build the web/main.dart app only: --build-filter=web/main.dart.js.

For tests you will need to specify the bootstrapped test file, so: --build-filter=test/hello_world.dart.browser_test.dart.js.

Previously you also had to explicitly require the SDK resources like: --build-filter="package:build_web_compilers/**.js" or similar.

Note: If your app relies on any non-Dart generated files you will likely have to ask for those explicitly as well with additinal filters.

• Add an option to the DDC bootstrap to skip the checks around modules that have imports to unsupported SDK libraries like dart:io when the module is from a specified package. This is not used in the default build, but is available for custom DDC integrations.

• Allow analyzer version 0.38.0.

• Re-publish 2.2.0 with proper minimum sdk constraint of >=2.4.0.

• Revert of bad 2.2.0 release (had a bad min sdk).

• Make librariesPath configurable in DevCompilerBuilder.

• Add pre-emptive support for an upcoming breaking change in ddc around entrypoint naming.

• Allow analyzer version 0.37.0.

• Improve error message when dart2js_args is configured improperly.

• Fix hot restart bootstrapping logic for dart scripts that live in a different directory than the html file.

• Prepare for source map change from dartdevc, don't modify relative paths in source maps.
• Fix hot reload bootstrap logic for app entrypoints under lib.

• Make platformSdk, sdkKernelPath, and platform configurable in DevCompilerBuilder.

• Prepare for the next sdk release, which changes what the uris look like for non-package sources, and breaks our existing hot restart logic.

• Fix issue #2269, which could cause applications to fail to properly bootstrap.
• Skip compiling modules with ddc when the primary source isn't the primary input (only shows up in non-lazy builds - essentially just tests).