Since Material and Cupertino are frozen in flutter/flutter, and their main code has been copied to flutter/packages in flutter/packages#11888, we should port to flutter/packages any open PR that affects the ported code.

Which PRs should be ported?

• Any open PRs with the override-code-freeze label: https://github.com/flutter/flutter/pulls?q=is%3Apr+label%3A%22override+code+freeze%22+is%3Aopen
• Open PRs with the waiting-on-code-freeze label: https://github.com/flutter/flutter/pulls?q=is%3Apr+is%3Aopen+label%3A%22waiting+for+code+freeze%22+
• Any other open PRs that might not have the label but that do affect the directories copied in Decoupling recopy packages#11888. How to best detect these? The directories that were copied are:
  • packages/flutter/lib/src/material
  • packages/flutter/test/material
  • examples/api/lib/material
  • examples/api/test/material
  • packages/flutter/lib/src/cupertino
  • packages/flutter/test/cupertino
  • examples/api/lib/cupertino
  • examples/api/test/cupertino
  • packages/flutter/lib/fix_data/fix_material
  • packages/flutter/test_fixes/material
  • packages/flutter/lib/fix_data/fix_cupertino.yaml
  • packages/flutter/test_fixes/cupertino

How should PRs be ported?

If possible, the easiest way may be to cherry pick the commits to flutter/packages:

1. Cherry pick the commits from the PR into a new branch in flutter/packages. Do not include merge commits.

git remote add <author's GitHub ID> git@github.com:<author's GitHub ID>/flutter.git
git fetch <author's GitHub ID>
git cherry-pick <list of SHAs from the author's PR, excluding merge commits>

2. Fix any conflicts and ensure that the changes ended up in the correct directories.
3. Push your branch and open a new PR. Tag the original author.
4. Close the old PR and leave a coment pointing to the new PR.

Some of the affected tests may be in the temporarily_disabled_tests directory of cupertino_ui or material_ui. If your change is fixing a gross import for these tests, they may be moved to the main test directory.

For an example PR, see flutter/packages#11965.

Related

Similar to #188441, which covers porting over merged PRs.