Bootstrapping Buck2

To generate BUCK files for buck2's dependencies, we use reindeer.

Note that the resulting binary will be compiled without optimisations or jemalloc, so we recommend using the Cargo-produced binary in further development.

First, install reindeer with Cargo:

cargo install --locked --git https://github.com/facebookincubator/reindeer reindeer

Next, run the following to buckify dependencies:

cd buck2/
reindeer --third-party-dir shim/third-party/rust buckify

Build buck2 with buck2:

buck2 build //:buck2