Towards https://github.com/flutter/flutter/issues/171900.
The "legacy" (`//version`) file has been "legacy" for years. This PR
allows deprecating and removing it in the near future.
Example of `//bin/cache/flutter.version.json`:
```json
{
"frameworkVersion": "3.33.0-1.0.pre-1070",
"channel": "master",
"repositoryUrl": "unknown source",
"frameworkRevision": "be9526fbaaaab9474e95d196b70c41297eeda2d0",
"frameworkCommitDate": "2025-07-22 11:34:11 -0700",
"engineRevision": "be9526fbaaaab9474e95d196b70c41297eeda2d0",
"engineCommitDate": "2025-07-22 18:34:11.000Z",
"engineContentHash": "70fb28dde094789120421d4e807a9c37a0131296",
"engineBuildDate": "2025-07-22 11:47:42.829",
"dartSdkVersion": "3.10.0 (build 3.10.0-15.0.dev)",
"devToolsVersion": "2.48.0",
"flutterVersion": "3.33.0-1.0.pre-1070"
}
```
Example of `//version`:
```txt
3.33.0-1.0.pre-1070
```
This auto-formats all *.dart files in the repository outside of the
`engine` subdirectory and enforces that these files stay formatted with
a presubmit check.
**Reviewers:** Please carefully review all the commits except for the
one titled "formatted". The "formatted" commit was auto-generated by
running `dev/tools/format.sh -a -f`. The other commits were hand-crafted
to prepare the repo for the formatting change. I recommend reviewing the
commits one-by-one via the "Commits" tab and avoiding Github's "Files
changed" tab as it will likely slow down your browser because of the
size of this PR.
---------
Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
