next space coop

Setup

Make sure you have a (recent) installation of bazel.

Working on next_space_coop

Pulling cargo dependencies down

All required third party dependencies should already exist in //third_party.

Working with Cargo.toml

We use Cargo (Rust's package manager) for third party dependency location and resolution, but there is a bit of a ritual to perform to acquire new dependencies.

Install cargo-vendor and cargo-raze via cargo install, like

cargo install cargo-vendor
cargo install cargo-raze

Then:

Add a dependency to the Cargo.toml
Open a shell into ./cargo
Run cargo generate-lockfile
Run cargo vendor -x
Run cargo raze "//cargo/vendor"

Building Rust on Nix

For users on Nixos, there is an extra step -- patching the rustc the cargo pulls down. You'll want to run something like the following (adjusted for your user and bazel path).

 patchelf  --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" ~/.cache/bazel/_bazel_alex/137a6182ca2a00cee867ee137dbd907b/execroot/prototype3/external/rust_linux_x86_64/rustc/bin/rustc

Building with Bazel on NixOS

This repo comes bundled with a default.nix, and an old-ish bazel dependency override. You'll want to link that in, or go excavate a newer version from my dotfiles

Code organization

See the root directories for information on their purposes

Running the application

In the case of space_coop (the testbed game), for the client and the server, you'll need to build the core crate, which is the hotloaded game, and the launcher crate, which hotloads the game. My current workflow is as follows.

// In one window
//
// Start autobuilding server core
./space_coop/server/core/hotbuild.sh

// In another window
bazel build //space_coop/server/launcher
// Launch outside bazel to avoid blocking rebuilds of core
./space_coop/server/launcher

This workflow keeps the latest code loaded at all times, and automatically compiles for you similar to cargo watch.