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README-BUCK.md

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Building ocamlrep with Buck2 and Reindeer

Instructions on how to setup a Buck2 build of ocamlrep. More Buck2 information & examples can be found on the Buck2 website.

Setup

Install Buck2

Buck2 binary

  • Get the latest prebuilt buck2 binary (and symlink it into '/usr/local/bin').

    wget https://github.com/facebook/buck2/releases/download/latest/buck2-"$PLAT".zst
zstd -d buck2-"$PLAT".zst -o buck2
chmod +x buck2
sudo ln -s "$(pwd)"/buck2 /usr/local/bin/buck2

Valid values for $PLAT are x86_64-unknown-linux-gnu on Linux, x86_64-apple-darwin on x86 macOS and aarch64-apple-darwin on ARM macOS.

Buck2 prelude

  • Initialize a Buck2 prelude Git submodule.

    git submodule update --init

Reindeer

Reindeer is a tool to generate Buck2 rules for Rust crates.

  • Install the reindeer binary from source (into '~/.cargo/bin').

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

OPAM

  • Initialize OPAM.

    opam init --compiler=5.1.1 --disable-sandboxing -y
eval $(opam env)

Symlink OPAM

  • Run the script 'ocaml-setup.sh'.

    ./ocaml-setup.sh

Note: The script assumes that OPAM_SWITCH_PREFIX is set.

Generate BUCK rules for third-party Rust.

  • Run reindeer buckify.

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

Build

  • Build the complete set of ocamlrep targets.

    buck2 build root//...