Third-party Dart packages

There are two types of third-party dependencies in the Fuchsia tree:

• Extracted from pub.
• Synced from Git.

Pub dependencies

Pub dependencies are hosted at //third-party/dart-pkg. That project is regularly kept up-to-date with a script that relies on the pub tool to resolve versions and fetch sources for the packages that are used in the tree. This script uses a set of canonical local packages, which are assumed to be providing the necessary package coverage for the entire tree.

Additionally, projects may request third-party dependencies to be imported through the following procedure:

1. Create a dart_dependencies.yaml file in the project.

2. Add the desired dependencies in that file:

   name: my_project
   dependencies:
     foo: ^4.0.0
     bar: >=0.1.0
   

3. Add a reference to the file in //scripts/dart/update_3p_packages.py.

4. Run that script.

5. Merge your changes to dart_dependencies.yaml to master.

6. Merge the files, downloaded by running the update_3p_packages.py script, and the script itself to master.

7. In the //topaz/manifest/dart manifest, update the project node third_part/dart-pkg revision attribute with the SHA from your commit in Step 6.

8. Merge your change to the //topaz/manifest/dart manifest file to master.