@earendil-works/pi-coding-agent/dist/utils/clipboard-command.js

Coding agent CLI with read, bash, edit, write tools and session management

import { spawn } from "node:child_process";
/** Undefined means the command failed; an empty buffer is a successful result. */
export function runClipboardCommand(command, args, options) {
    return new Promise((resolve) => {
        // Clipboard writers can daemonize. Do not give them output pipes to retain.
        // Detach on POSIX so the daemon leaves pi's process group and Ctrl+Z suspend
        // (SIGTSTP to the group) does not stop the clipboard owner (#11179).
        // Run from / (the current drive root on Windows): clipboard tools ignore the cwd, and WSL cannot start
        // Windows executables (powershell.exe) when the cwd's \\wsl.localhost\... path
        // exceeds MAX_PATH (#11592). This also keeps daemons from pinning pi's cwd.
        const child = spawn(command, args, {
            stdio: ["pipe", options?.input === undefined ? "pipe" : "ignore", "ignore"],
            cwd: "/",
            detached: process.platform !== "win32",
            windowsHide: true,
        });
        const chunks = [];
        let length = 0;
        let settled = false;
        const finish = (result) => {
            if (settled)
                return;
            settled = true;
            clearTimeout(timer);
            resolve(result);
        };
        const abort = () => {
            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) => {
            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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