@cocalc/project/dist/jupyter/upstream-jupyter.js

CoCalc: project daemon

"use strict";
/*
Start official upstream Jupyter(Lab) server if necessary, then send a message
to the hub with the port the server is serving on.

This is used by the proxy server to route a certain URL to jupyter(lab).

- socket -- TCP connection between project and hub
- mesg -- the message from the hub requesting the jupyter port.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const util_1 = require("util");
const child_process_1 = require("child_process");
const logger_1 = require("@cocalc/project/logger");
const exec = (0, util_1.promisify)(child_process_1.exec);
const winston = (0, logger_1.getLogger)("upstream-jupyter");
async function getPort(lab = false) {
    let s = await status(lab);
    winston.debug(`jupyter_port, lab=${lab}, status = ${JSON.stringify(s)}`);
    if (!s.port || s.status != "running") {
        winston.debug("getPort: not running so start");
        s = await start(lab);
    }
    if (!s.port || s.status != "running") {
        throw Error(`unable to start jupyter ${lab ? "lab" : "classic"}`);
    }
    winston.debug(`getPort: started jupyter ${lab ? "lab" : "classic"} at port ${s.port}`);
    return s.port;
}
exports.default = getPort;
async function cmd(arg, lab) {
    const command = `cc-jupyter${lab ? "lab" : ""} ${arg}`;
    winston.debug(command);
    return await exec(command);
}
async function start(lab) {
    const { stdout } = await cmd("start", lab);
    return JSON.parse(stdout);
}
async function status(lab) {
    try {
        const { stdout } = await cmd("status", lab);
        return JSON.parse(stdout);
    }
    catch (err) {
        return { status: "stopped" };
    }
}
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