waforth/scripts/esbuild/wasm-text.js

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2022-04-14 08:53:53 +02:00
/* eslint-env node */
const { promisify } = require("util");
const exec = promisify(require("child_process").exec);
const fs = require("fs");
const path = require("path");
function wasmTextPlugin() {
return {
name: "wasm-text",
setup(build) {
build.onResolve({ filter: /.\.wat$/ }, async (args) => {
if (args.resolveDir === "") {
return;
}
const watPath = path.isAbsolute(args.path)
? args.path
: path.join(args.resolveDir, args.path);
return {
path: watPath,
namespace: "wasm-text",
watchFiles: [watPath],
};
});
build.onLoad({ filter: /.*/, namespace: "wasm-text" }, async (args) => {
// Would be handy if we could get output from stdout without going through file
const out = args.path.replace(".wat", ".wasm");
const flags = "";
// flags = --debug-names
// console.log("wat: compiling %s", args.path);
await exec(`wat2wasm ${flags} --output=${out} ${args.path}`);
return {
contents: await fs.promises.readFile(out),
loader: "binary",
};
});
},
};
}
module.exports = {
wasmTextPlugin,
};