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CONTRIBUTING.md

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Contributing

Please file issues (bug reports, questions, feature requests, etc.) on the GitHub repository. That's also the place for pull requests. If you're planning to make a big change, please file an issue first to avoid duplicate effort.

Outside of GitHub, most development discussion happens at the SIG Guest Languages Python subgroup meetings and the Guest Languages Zulip channel.

Building from source

For the time being, we use temporary forks of wasi-sdk and wasi-libc which enable support for wasi-sockets. Once that support is upstreamed, we'll switch.

Prerequisites

  • Tools needed to build CPython (Make, Clang, etc.)
  • Rust stable 1.71 or later and nightly 2023-07-27 or later, including the wasm32-wasi and wasm32-unknown-unknown targets
    • Note that we currently use the -Z build-std Cargo option to build the componentize-py runtime with position-independent code (which is not the default for wasm32-wasi) and this requires using a recent nightly build of Rust.

For Rust, something like this should work once you have rustup:

rustup update
rustup install nightly
rustup component add rust-src --toolchain nightly
rustup target add wasm32-wasi wasm32-unknown-unknown

Building and Running

First, make sure you've got all the submodules cloned.

git submodule update --init --recursive

Next, install WASI SDK to /opt/wasi-sdk (alternatively, you can specify a different location and reference it later using the WASI_SDK_PATH environment variable). Replace linux with macos or mingw (Windows) below depending on your OS.

curl -LO https://github.com/dicej/wasi-sdk/releases/download/wasi-sockets-alpha-5/wasi-sdk-20.46gf3a1f8991535-linux.tar.gz
tar xf wasi-sdk-20.46gf3a1f8991535-linux.tar.gz
sudo mv wasi-sdk-20.46gf3a1f8991535 /opt/wasi-sdk
export WASI_SDK_PATH=/opt/wasi-sdk

Finally, build and run componentize-py.

cargo run --release -- --help