Crafter.Build/tests/WasmHelloRuns/main.cpp

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// SPDX-License-Identifier: LGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
import std;
import Crafter.Build;
namespace fs = std::filesystem;
using namespace Crafter;
// A wasm build end to end: the fixture is compiled for wasm32-wasip1 against
// the resolved toolchain's WASI sysroot and the result is run under
// wasmtime. The other wasm tests only inspect generated files; this is the
// one that proves the sysroot, the std module for wasm and wasm-ld all work
// together. It skips when the sysroot or wasmtime is missing, so a
// development box without them is not a failure. Inside the Flatpak both are
// bundled, and there the skip would be the failure to look for.
int main() {
const Toolchain& tc = GetToolchain();
if (!fs::exists(tc.wasiSysroot / "include")) {
std::println(std::cerr, "SKIP: no WASI sysroot at {}", tc.wasiSysroot.string());
return 77;
}
if (std::system("which wasmtime > /dev/null 2>&1") != 0) {
std::println(std::cerr, "SKIP: wasmtime not on PATH");
return 77;
}
Configuration cfg;
cfg.path = fs::current_path() / "tests" / "WasmHelloRuns" / "fixture";
cfg.name = "wasm-hello";
cfg.outputName = "wasm-hello";
cfg.target = "wasm32-wasip1";
cfg.type = ConfigurationType::Executable;
std::array<fs::path, 0> ifaces = {};
std::array<fs::path, 1> impls = { "main" };
cfg.GetInterfacesAndImplementations(ifaces, impls);
std::unordered_map<fs::path, std::shared_future<BuildResult>> depResults;
std::mutex depMutex;
BuildResult r = Build(cfg, depResults, depMutex);
if (!r.result.empty()) {
std::println(std::cerr, "build failed: {}", r.result);
return 1;
}
const fs::path wasm = ExpectedOutput(cfg);
if (!fs::exists(wasm)) {
std::println(std::cerr, "no .wasm produced at {}", wasm.string());
return 1;
}
const auto run = RunCommandWithTimeout(std::format("wasmtime {}", wasm.string()), std::chrono::seconds(60));
if (run.exitCode != 0 || !run.output.contains("hello from wasm")) {
std::println(std::cerr, "wasmtime run failed (exit {}): {}", run.exitCode, run.output);
return 1;
}
return 0;
}