Jens Johansen
a1ba5461d8
All numbers via ``` perf stat -e instructions:u out/ReleaseX64/dart-sdk/bin/dartaotruntime_product --deterministic --marker_tasks=1 --new_gen_semi_initial_size=10000 --new_gen_semi_max_size=20000 pkg/analyzer/tool/stable_analysis.aot --silent /tmp/stable_analysis_extract ``` ### Update With https://dart-review.googlesource.com/c/sdk/+/478701 having been reverted I've rebased and this is the new numbers: Parent CL: 42,708,904,561 instructions:u 42,705,451,731 instructions:u 42,705,714,002 instructions:u This CL: 42,517,120,185 instructions:u 42,517,237,423 instructions:u 42,514,559,436 instructions:u Saves ~188 mio instructions --------- ### Original commit message At parent CL: 43,497,152,157 instructions:u 43,496,619,753 instructions:u 43,496,990,462 instructions:u with this CL: 43,114,441,607 instructions:u 43,115,191,318 instructions:u 43,114,584,671 instructions:u So this saves ~381 mio instructions... Notice that metadata is used a lot more with https://dart-review.googlesource.com/c/sdk/+/478701 which cost ~900 mio instructions. Reverting that CL I get: 42,696,057,264 instructions:u 42,698,447,840 instructions:u 42,695,543,793 instructions:u Reverting and applying this CL I get: 42,504,068,113 instructions:u 42,503,699,054 instructions:u 42,503,965,559 instructions:u So this still saves ~191 mio instructions. Change-Id: Ibc8ff507c0ef043a3d04f6c952001795f04938bb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/481801 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Jens Johansen <jensj@google.com>
This package provides a library that performs static analysis of Dart code. It is useful for tool integration and embedding.
End-users should use the dart analyze command-line tool to analyze their Dart code.
Integrators that want to add Dart support to their editor should use the Dart Analysis Server. The Analysis Server API Specification is available. If you are adding Dart support to an editor or IDE, please let us know by emailing our list.
Configuring the analyzer
Both dart analyze and Dart Analysis Server can be configured with an
analysis_options.yaml file (using an .analysis_options file is deprecated).
This YAML file can control which files and paths are analyzed,
which lints are applied, and more.
If you are embedding the analyzer library in your project, you are responsible for finding the analysis options file, parsing it, and configuring the analyzer.
The analysis options file should live at the root of your project (for example,
next to your pubspec.yaml). Different embedders of analyzer, such as
dart analyze or Dart Analysis Server, may choose to find the file in various
different ways. Consult their documentation to learn more.
Here is an example file that instructs the analyzer to ignore two files:
analyzer:
exclude:
- test/_data/p4/lib/lib1.dart
- test/_data/p5/p5.dart
- test/_data/bad*.dart
- test/_brokendata/**
Note that you can use globs, as defined by the glob package.
Here is an example file that enables two lint rules:
linter:
rules:
- camel_case_types
- empty_constructor_bodies
Check out all the available Dart lint rules.
You can combine the analyzer section and the linter section into a single
configuration. Here is an example:
analyzer:
exclude:
- test/_data/p4/lib/lib1.dart
linter:
rules:
- camel_case_types
For more information, see the docs for customizing static analysis.
Who uses this library?
Many tools embed this library, such as:
- dart format - a formatter for Dart code
- dart doc - a documentation generator for Dart code
- Dart Analysis Server - a stateful server that supports IDEs and editors
Support
Post issues and feature requests at https://github.com/dart-lang/sdk/issues. These will be triaged according to the analyzer triage priorities.
Questions and discussions are welcome at the Dart Analyzer Discussion Group.
Background
The APIs in this package were originally machine generated by a translator and were based on an earlier Java implementation. Several of the API's still look like their Java predecessors rather than clean Dart APIs.
In addition, there is currently no clean distinction between public and internal APIs. We plan to address this issue but doing so will, unfortunately, require a large number of breaking changes. We will try to minimize the pain this causes for our clients, but some pain is inevitable.
License
See the LICENSE file.