@plugjs/plug/dist/logging/spinner.js

PlugJS Build System ===================

/* coverage ignore file */
import { runningTasks } from "../async.js";
import { $cyn, $gry, $plur, $t } from "./colors.js";
import { logOptions } from "./options.js";
/* ========================================================================== */
/* Clear the current line and set column to zero */
export const zapSpinner = '\u001b[0G\u001b[2K';
/* Disable word wrap (when running lotsa tasks) */
export const disableWrap = '\u001b[?7l';
/* Enable word wrap (after printing lotsa tasks) */
export const enableWrap = '\u001b[?7h';
/* ========================================================================== */
/* Initial value of log colors, and subscribe to changes */
let _output = logOptions.output;
let _colors = logOptions.colors;
let _format = logOptions.format;
let _spinner = logOptions.spinner;
let _taskLength = logOptions.taskLength;
logOptions.on('changed', ({ output, colors, format, spinner, taskLength }) => {
    _output = output;
    _colors = colors;
    _format = format;
    _spinner = spinner;
    _taskLength = taskLength;
    setupSpinner();
});
/* ========================================================================== */
/* Spinner characters */
const _spins = [
    $cyn('\u2809'), // ⠉ - 14
    $cyn('\u2819'), // ⠙ - 145
    $cyn('\u2818'), // ⠘ - 45
    $cyn('\u2838'), // ⠸ - 456
    $cyn('\u2830'), // ⠰ - 56
    $cyn('\u2834'), // ⠴ - 356
    $cyn('\u2824'), // ⠤ - 36
    $cyn('\u2826'), // ⠦ - 236
    $cyn('\u2806'), // ⠆ - 23
    $cyn('\u2807'), // ⠇ - 123
    $cyn('\u2803'), // ⠃ - 12
    $cyn('\u280b'), // ⠋ - 124
];
/* The index in our `_spins` */
let _nextSpin = 0;
/* The interval running the spinner */
let _interval;
/* Spin the spinner! */
function spin() {
    if (!_colors)
        return clearInterval(_interval);
    if (!_spinner)
        return clearInterval(_interval);
    const tasks = runningTasks();
    if (!tasks.length)
        return;
    const pad = ''.padStart(_taskLength, ' ');
    const names = tasks.map((task) => $t(task)).join($gry(', '));
    const task = $plur(tasks.length, 'task', 'tasks');
    _nextSpin = (++_nextSpin) % _spins.length;
    _output.write(`${zapSpinner}${disableWrap}${pad} ${_spins[_nextSpin]}  Running ${task}: ${$gry(names)}${enableWrap}`);
}
/* Start or stop the spinner */
export function setupSpinner() {
    if (_interval)
        clearInterval(_interval);
    if (_colors && _spinner && (_format === 'fancy')) {
        _interval = setInterval(spin, 150).unref();
    }
}
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