Lots of projects developed at Google use Starlark. Copybara is one of them. That's where the connection comes from.
Many other companies are also adopting Starlark for their own needs. For example, Meta has invested a lot in Starlark and published their implementation (https://developers.facebook.com/blog/post/2021/04/08/rust-st...), although they don't use Bazel at all.
Starlark was first created for Bazel. The organic user growth comes from people who have seen and used the language, so often Bazel users. But it doesn't have to be.
Lots of projects developed at Google use Starlark. Copybara is one of them. That's where the connection comes from.
Many other companies are also adopting Starlark for their own needs. For example, Meta has invested a lot in Starlark and published their implementation (https://developers.facebook.com/blog/post/2021/04/08/rust-st...), although they don't use Bazel at all.
Starlark was first created for Bazel. The organic user growth comes from people who have seen and used the language, so often Bazel users. But it doesn't have to be.