File size: 1,501 Bytes
f500658 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | import { spawn } from "node:child_process";
/** Undefined means the command failed; an empty buffer is a successful result. */
export function runClipboardCommand(
command: string,
args: readonly string[],
options?: { input?: string; timeoutMs?: number; maxBufferBytes?: number },
): Promise<Buffer | undefined> {
return new Promise((resolve) => {
// Clipboard writers can daemonize. Do not give them output pipes to retain.
const child = spawn(command, args, {
stdio: ["pipe", options?.input === undefined ? "pipe" : "ignore", "ignore"],
windowsHide: true,
});
const chunks: Buffer[] = [];
let length = 0;
let settled = false;
const finish = (result: Buffer | undefined): void => {
if (settled) return;
settled = true;
clearTimeout(timer);
resolve(result);
};
const abort = (): void => {
child.kill("SIGKILL");
child.stdout?.destroy();
child.stdin?.destroy();
finish(undefined);
};
const timer = setTimeout(abort, options?.timeoutMs ?? 3000);
child.on("error", () => finish(undefined));
child.on("close", (code) => {
if (!settled) finish(code === 0 ? Buffer.concat(chunks, length) : undefined);
});
child.stdout?.on("data", (chunk: Buffer) => {
if (settled) return;
length += chunk.length;
if (length > (options?.maxBufferBytes ?? 50 * 1024 * 1024)) abort();
else chunks.push(chunk);
});
child.stdin?.on("error", () => {}); // A writer may exit before consuming all input.
child.stdin?.end(options?.input);
});
}
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