@kwsites/exec-p/dist/index.js

Execute a command and retrieve data as a promise.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const child_process_1 = require("child_process");
/**
 * Spawns a child process to run the specified command. When there is a non-zero exit code, and there has been
 * output to `stderr` the resulting promise will throw and must be caught by the caller.
 *
 * @returns {Promise<string>}
 */
function execP(command, params = [], options = {}) {
    return new Promise((ok, fail) => {
        const out = [];
        const err = [];
        const spawned = child_process_1.spawn(command, params, options);
        spawned.stdout.on('data', data => out.push(data));
        spawned.stderr.on('data', data => err.push(data));
        spawned.on('error', e => err.push(new Buffer(String(e.stack), 'ascii')));
        spawned.on('exit', (exitCode, exitSignal) => {
            if (exitCode && err.length) {
                return fail(new Error(Buffer.concat(err).toString('utf-8')));
            }
            ok(Buffer.concat(out).toString('utf-8'));
        });
    });
}
exports.execP = execP;