Rewrite it in Rust #9512

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2023-01-31 00:00:31

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This should be thought of as a "port" instead of a "rewrite" because we would not start from scratch; instead we would translate C++ to Rust, incrementally, module by module, in the span of one release. We'll use an FFI so the Rust and C++ bits can talk to each other until C++ is gone, and tests and CI keep passing at every commit.

To prove it can work, in this PR I've ported FLOG, topic monitor, wgetopt, builtin_wait, and some others to Rust. The Rust bits live in a crate that lives inside the C++ and links with it. You can just build it the usual way:

The Plan has a high level description, and the Development Guide has more technical details on how to proceed. Please consider both to be part of this PR.