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denoland-deno/tests/specs/node/stdio_ipc/main.mjs

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import { spawn } from "node:child_process";
import process from "node:process";
if (process.argv[2] === "child") {
process.send("hahah");
} else {
const proc = spawn(process.execPath, ["./main.mjs", "child"], {
stdio: ["ipc", "inherit", "inherit"],
});
proc.on("message", function (msg) {
console.log(`msg: ${msg}`);
proc.kill();
Deno.exit(0);
});
}