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description = "Synapse Agriculture — WASM-native farm stack development environment";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
rust-overlay.url = "github:oxalica/rust-overlay";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, rust-overlay, flake-utils }:
flake-utils.lib.eachDefaultSystem (system:
let
overlays = [ (import rust-overlay) ];
pkgs = import nixpkgs { inherit system overlays; };
# Rust stable with WASM targets.
# Two targets, two purposes:
# wasm32-unknown-unknown → bare WASM for MCU (wasm3) and browser
# wasm32-wasip1 → WASI preview 1 for gateway/host (wasmtime)
rustToolchain = pkgs.rust-bin.stable.latest.default.override {
extensions = [ "rust-src" "rust-analyzer" ];
targets = [
"wasm32-unknown-unknown"
"wasm32-wasip1"
];
};
in
{
devShells.default = pkgs.mkShell {
buildInputs = with pkgs; [
# ── Rust compilation ──────────────────────────────────────
rustToolchain
# ── WASM runtimes ─────────────────────────────────────────
wasmtime # Full WASI + Component Model runtime
# Tests gateway/host modules with all capabilities
# ── WASM binary tools ─────────────────────────────────────
binaryen # wasm-opt: aggressive size optimization
# wasm-opt -Oz -o small.wasm big.wasm
# Critical for MCU — can cut binaries 40-60%
wabt # wasm2wat / wat2wasm: bytecode inspection
# When something breaks, read the WAT
wasm-tools # Bytecode Alliance multi-tool:
# validate, component lower, strip, compose
# component lower = component → core wasm for MCU
# ── Web frontend ──────────────────────────────────────────
trunk # Dev server for Leptos/Yew WASM apps
# Handles wasm-bindgen, assets, hot reload
wasm-pack # WASM npm package builder (JS interop)
wasm-bindgen-cli
# ── Size profiling ────────────────────────────────────────
twiggy # WASM code size profiler
# twiggy top module.wasm — largest functions
# twiggy dominators module.wasm — dep graph
# RP2350 budget: ~400KB for module + heap
# ── Build deps ────────────────────────────────────────────
cmake # For building wasm3 from source
pkg-config
openssl
# ── Dev workflow ──────────────────────────────────────────
cargo-watch # cargo watch -x test — auto-test on save
];
shellHook = ''
echo ""
echo " ┌──────────────────────────────────────────────┐"
echo " │ Synapse Agriculture — WASM Dev Environment │"
echo " └──────────────────────────────────────────────┘"
echo ""
echo " Rust: $(rustc --version 2>/dev/null || echo 'loading...')"
echo " wasmtime: $(wasmtime --version 2>/dev/null || echo 'loading...')"
echo " wasm-opt: $(wasm-opt --version 2>/dev/null || echo 'loading...')"
echo ""
echo " Build targets:"
echo " wasm32-unknown-unknown → MCU (wasm3) + browser"
echo " wasm32-wasip1 → gateway/host (wasmtime)"
echo ""
echo " Quick start:"
echo " cargo test all native tests"
echo " cargo build -p synapse-sensor --target wasm32-unknown-unknown --release"
echo " wasm-opt -Oz -o opt.wasm target/.../synapse_sensor.wasm"
echo " twiggy top opt.wasm size check"
echo ""
'';
};
}
);
}
|