gaaclarke 386f767f36
licenses_cpp: initial commit (#169105)
Initial commit for the c++ license checker.

This lays the foundation for all the technical challenges. The logic
isn't 100% what we want yet. This is a facsimile of the operations we
want to perform and currently it operates in 30s as opposed to 30m with
the old license chcker.

Included in this PR:
1) Sets up BUILD.gn
   1) Makes RE2 available to the repo.
   1) Sets up the test infrastructure (integration and unit tests).
   1) Sets up the executable.
   1) Sets up VSCode integration
1) Sets up the CI (macos builds for now)
1) Sets up logic
   1) Sets up the crawling through the tree.
   1) Sets up flex lexer for comments.
   1) Runs git subprocesses.
   1) Parses command line arguments.
1) Sets up data practices
   1) Allow/deny lists added.
   1) In memory representation of license catalog added.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
2025-06-10 14:07:23 +00:00
..