build

• Added List<String> get pathSegments to AssetId.
• log will now always return a Logger instance.
• Support package:analyzer 0.32.0.

• Add exclude support to FileDeletingBuilder.

• Add FileDeletingBuilder.
• Add PostProcesBuilderFactory typedef.

• Added an isRoot boolean to BuilderOptions, which allows builders to have different behavior for the root package, if desired.
• Add PostProcessBuilder. This is only supported by build_runner.

• Include stack trace in log for exceptions throw by builders.

• Add BuilderOptions.empty and BuilderOptions.overrideWith.

Breaking Changes

• Added the Future<Digest> digest(AssetId id) method to the AssetReader interface. There is a default implementation which uses readAsBytes and md5.

• Support the latest analyzer package.

• Bug Fix Correctly handle encoding AssetIds as URIs when they contain characters which are not valid for a path segment.

• Bug Fix: MultiplexingBuilder now filters inputs rather than calling every builder on any input that matched any builder.

• Add BuilderOptions and BuilderFactory interfaces. Along with package:build_config this will offer a consistent way to describe and create the Builder instances exposed by a package.

• Breaking: AssetReader.findAssets now returns a Stream<AssetId> instead of an Iterable<AssetId>. This also impacts BuildStep since that implements AssetReader.

• Added the MultiPackageAssetReader interface which allows globbing within any package.
  • This is not exposed to typical users, only build system implementations need it. The BuildStep class does not implement this interface.
• The docs for AssetReader#findAssets have changed such that it globs within the current package instead of the root package (typically defined as buildStep.inputId.package).
  • Before you could run builders only on the root package, but now that you can run them on any package the old functionality no longer makes sense.

• Fix an issue where multiple ResourceManagers would share Resource instances if running at the same time.

• Remove restrictions around the root package when Builders are running. It is the responsibility of the build system to ensure that builders are only run on inputs that will produce outputs that can be written.
• Added the Resource class, and BuildStep#fetchResource method.

• Breaking: Removed deprecated method BuildStep.hasInput - all uses should be going through BuildStep.canRead.
• Breaking: Resolver has asynchronous APIs for resolution and is retrieved synchronously from the BuildStep.
• Breaking: Replaced Resolver.getLibrary with libraryFor and getLibraryByName with findLibraryByName.
• Change AssetReader.canRead to always return a Future.

• Bug Fix: Capture asynchronous errors during asset writing.

• Add support for resolving asset: URIs into AssetIds
• Add uri property on AssetId

• Skip Builders which would produce no outputs.

• Deprecate BuildStep.hasInput in favor of BuildStep.canRead.
• Rename AssetReader.hasInput as canRead. This is breaking for implementers of AssetReader and for any clients passing a BuildStep as an AssetReader
• Make canRead return a FutureOr for more flexibility
• Drop ManagedBuildStep class.
• Drop BuildStep.logger. All logging should go through the top level log.
• BuildStep.writeAs* methods now take a FutureOr for content. Builders which produce content asynchronously can now set up the write without waiting for it to resolve.
• Breaking declareOutputs is replaced with buildExtensions. All Builder implementations must now have outputs that vary only based on the extensions of inputs, rather than based on any part of the AssetId.

• Add AssetReader.findAssets to allow listing assets by glob.

• Add BuildStep.inputLibrary as a convenience.
• Fix a bug in AssetId.resolve to prepend lib/ when resolving packages.

• Add an AssetId.resolve constructor to easily construct AssetIds from import uris.
• Capture 'print' calls inside running builds and automatically turn them in to log.info. Depending on the environment a print can be hazardous so this makes all builders safe and consistent by default.

• Add a top-level log getter which is scoped to running builds and can be used anywhere within a build rather than passing around a logger. This replaces the BuildStep.logger field.
• Deprecate BuildStep.logger - it is replaced by log
• Deprecate ManagedBuildStep, all build runs should go through runBuilders.

• Use comment syntax for generic method - not everyone is on an SDK version that supports the real syntax.

A number of changes to the apis, primarily to support reading/writing as bytes, as this is going to inevitably be a required feature. This will hopefully be the last breaking change before the 1.0 release, but it is a fairly large one.

New Features

• The AssetWriter class now has a Future writeAsBytes(AssetId id, List<int> bytes) method.
• The AssetReader class now has a Future<List<int>> readAsBytes(AssetId id) method.
• You no longer need to call Resolver#release on any resolvers you get from a BuildStep (in fact, the Resolver interface no longer has this method).
• There is now a BuildStep#resolver getter, which resolves the primary input, and returns a Future<Resolver>. This replaces the BuildStep#resolve method.
• Resolver has a new isLibrary method to check whether an asset is a Dart library source file before trying to resolve it's LibraryElement

Breaking Changes

• The Asset class has been removed entirely.
• The AssetWriter#writeAsString signature has changed to Future writeAsString(AssetId id, String contents, {Encoding encoding}).
• The type of the AssetWriterSpy#assetsWritten getter has changed from an Iterable<Asset> to an Iterable<AssetId>.
• BuildStep#input has been changed to BuildStep#inputId, and its type has changed from Asset to AssetId. This means you must now use BuildStep#readAsString or BuildStep#readAsBytes to read the primary input, instead of it already being read in for you.
• Resolver no longer has a release method (they are released for you).
• BuildStep#resolve no longer exists, and has been replaced with the BuildStep#resolver getter.
• Resolver.getLibrary will now throw a NonLibraryAssetException instead of return null if it is asked to resolve an impossible library.

Note: The changes to AssetReader and AssetWriter also affect BuildStep and other classes that implement those interfaces.

• Add hook for build_barback to write assets from a Future

• Remove unused dependencies

• BuildStep now implements AssetReader and AssetWriter so it's easier to share with other code paths using a more limited interface.

• BREAKING Move some classes and methods out of this package. If you are using build, watch, or serve, along with PhaseGroup and related classes add a dependency on build_runner. If you are using BuilderTransformer or TansformerBuilder add a dependency on build_barback.
• BREAKING Resolvers is now an abstract class. If you were using the constructor const Resolvers() as a default instance import build_barback and used const BarbackResolvers() instead.

• BREAKING BuilderTransformer must be constructed with a single Builder. Use the MultiplexingBuilder to cover cases with a list of builders
• When using a MultiplexingBuilder if multiple Builders have overlapping outputs the entire step will not run rather than running builders up to the point where there is an overlap

• Support analyzer 0.28.x

• Support analyzer 0.29.x

• Stop using removed argument useSharedSources when constructing Resolvers
• Support code_transformers 0.5.x

• With the default logger, print exceptions with a terse stack trace.
• Provide a better error when an inputSet package cannot be found.
• Fix dev_dependencies so tests run.

• BREAKING BuilderTransformer must be constructed with a List<Builder> rather than inherit and override.
• Simplifies Resolver interface so it is possible to add implementations which are less complex than the one from code_transformers.
• Adds a Resolvers class and support for overriding the concrete Resolver that is used by build steps.
• Updates some test expectations to match the new behavior of analyzer.

• BREAKING Renamed values of three enums to be lower-case: BuildType, BuildStatus, and PackageDependencyType.
• Updated to crypto ^1.0.0.
• Added option to resolve additional entry points in buildStep.resolve.
• Added option to pass in a custom Resolvers instance.

• Fix an AssetGraph bug where generated nodes might be created as non-generated nodes if they are attempted to be read from previous build steps.

• Enable serving files outside the server root by default (enables serving files from other packages).

• Fixed BuilderTransformer so that logs are passed on to the TransformLogger.

• Add error and stack trace to log messages from the BuilderTransformer.

• Fix duplicate logs issue when running as a BuilderTransformer.

• Support crypto 2.0.0.

• Convert packages paths in the file watcher to their absolute paths. This fixes #109.

• Added the deleteFilesByDefault option to all top level methods. This will skip the prompt to delete files, and instead act as if you responded y.
  • Also by default in a non-console environment the prompt no longer exists and it will instead just exit with an error.
• Added support for multiple build scripts. Each script now has its own asset graph based on a hash of the script uri.
  • You need to be careful here, as you can get in an infinite loop if two separate build scripts keep triggering updates for each other.
  • There is no explicit link between multiple scripts, so they operate as if all changes from other scripts were user edits. This will usually just do the "right thing", but may result in undesired behavior in some circumstances.
• Improved logging for non-posix consoles.

• Updated the top level classes to take a PhaseGroup instead of a List<List<Phase>>.
• Added logic to handle nested package directories.
• Basic windows support added, although it may still be unstable.
• Significantly increased the resolving speed by using the same sources cache.
• Added a basic README.
• Moved the .build folder to .dart_tool/build. Other packages in the future may also use this folder.