Package scores & pub points #
NOTE: The Pub scoring model evolves over time, and is likely to be extended with additional checks in the future.
For each package, this site displays three scoring dimensions. These are displayed in search results, in the sidebar on individual package pages, and in full detail in the scoring report on the 'Scores' tag of an individual package. The three dimensions are:
- Likes: A measure of how many developers have liked a package. This provides a raw measure of the overall sentiment of a package from peer developers.
- Pub Points: A new measure of quality. This includes several dimensions of quality such as code style, platform support, and maintainability. More about this below.
- Popularity: A measure of how many developers use a package, providing insight into what other developers are using.
Likes offer a measure of how many developers have liked a package. To like a package, locate the thumbs up button located in the upper-right corner of a package page.
To view packages you have liked, use the My pub.flutter-io.cn > My liked packages menu option.
Popularity measures the number of apps that depend on a package over the past 60 days. We show this as a percentile from 100% (among the top 1% most used packages) to 0% (the least used package). We are investigating if we can provide absolute usage counts in a future version See this issue.
Although this score is based on actual download counts, it compensates for automated tools such as continuous builds that fetch the package on each change request.
Pub Points #
Pub points is pub.flutter-io.cn's measure of quality. Pub points are awarded in six categories:
Follow Dart file conventions #
Dart packages are expected to follow certain file conventions for how to organize a package. Most importantly make sure to:
pubspec.yamlfile. Ensure all Urls are valid and use a secure
README.md filedescribing the changes in each version of the package.
CHANGELOG.md filedescribing the changes in each version of the package. Make sure to follow the guidelines for how to format headings and versions so that these can be rendered correctly on pub.flutter-io.cn.
Provide documentation #
This category measures if a package has documentation in two areas:
The package has an illustrative code example. See the layout documentation for details about where to place this example.
At least 20% of the public API members contain API documentation.
Platform support #
Packages are encouraged to support multiple platforms, to enable app developers to support a wide variety of platforms for their apps. This includes Dart's native and web platforms, and Flutter's mobile, web, and desktop targets.
pub.flutter-io.cn knows about the following platforms:
And the two SDKs:
The platform support will be detected by analyzing the transitive import graph
of the top-level libraries, and finding what core libraries are used. (e.g. a
dart:html does not support the 'windows' platform).
If you need to import different libraries for specific platforms (e.g. on the web vs on devices), you can use Dart's conditional imports.
For packages that make sense or only have implementation on a subset of
platforms the detected platform support can be overridden with a platform
declaration in the
Flutter plugins declare their platforms by the
Packages using FFI or otherwise being platform-specific can declare their platform support using a top-level [
# This package works only on Windows and Linux. platforms: windows: linux:
Pass static analysis #
Static analysis is used to determine of the package contains any errors, warnings, and lints (code style issues).
To validate a package prior to publishing, run
dart analyze (Dart SDK) /
flutter analyze (Flutter SDK), and fix the items it returns.
For code style, make sure to familiarize yourself with the Dart style guide.
Support up-to-date dependencies #
This category measures if a package has up-to-date dependencies in three areas:
- Works with the latest stable Dart SDK.
- Works with the latest stable Flutter SDK (if applicable).
- Works with the latest versions of all dependencies.
To determine if your package supports the latest versions of dependencies prior
to publishing, run the
pub outdated command (Dart SDK) or
flutter pub outdated command (Flutter SDK).
This category will award points to packages that have updated to null-safety.
Calculating pub points prior to publishing #
The pub.flutter-io.cn site uses the analysis tool pana to calculate pub points. This is run automatically on the pub.flutter-io.cn site whenever you publish a new package, or a new version of an existing package.
You can view your pub points report to get suggestions before publishing, by
panawill make modifications to the package, so start by making a copy of the directory holding your package:
cp ~/dev/mypkg ~/tmp/mypkg
Make sure you have the latest pana tool:
dart pub global activate pana(
panachanges frequently, so run this again frequently to update the pana tool)
Run pana on the copy we made earlier:
dart pub global run pana ~/tmp/mypkg