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index.js
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Fri, Feb 14, 23:30

index.js
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'use strict';
const readline = require('readline');
const chalk = require('chalk');
const cliCursor = require('cli-cursor');
const cliSpinners = require('cli-spinners');
const logSymbols = require('log-symbols');
const stripAnsi = require('strip-ansi');
const wcwidth = require('wcwidth');
const isInteractive = require('is-interactive');
const MuteStream = require('mute-stream');
const TEXT = Symbol('text');
const PREFIX_TEXT = Symbol('prefixText');
const ASCII_ETX_CODE = 0x03; // Ctrl+C emits this code
class StdinDiscarder {
constructor() {
this.requests = 0;
this.mutedStream = new MuteStream();
this.mutedStream.pipe(process.stdout);
this.mutedStream.mute();
const self = this;
this.ourEmit = function (event, data, ...args) {
const {stdin} = process;
if (self.requests > 0 || stdin.emit === self.ourEmit) {
if (event === 'keypress') { // Fixes readline behavior
return;
}
if (event === 'data' && data.includes(ASCII_ETX_CODE)) {
process.emit('SIGINT');
}
Reflect.apply(self.oldEmit, this, [event, data, ...args]);
} else {
Reflect.apply(process.stdin.emit, this, [event, data, ...args]);
}
};
}
start() {
this.requests++;
if (this.requests === 1) {
this.realStart();
}
}
stop() {
if (this.requests <= 0) {
throw new Error('`stop` called more times than `start`');
}
this.requests--;
if (this.requests === 0) {
this.realStop();
}
}
realStart() {
// No known way to make it work reliably on Windows
if (process.platform === 'win32') {
return;
}
this.rl = readline.createInterface({
input: process.stdin,
output: this.mutedStream
});
this.rl.on('SIGINT', () => {
if (process.listenerCount('SIGINT') === 0) {
process.emit('SIGINT');
} else {
this.rl.close();
process.kill(process.pid, 'SIGINT');
}
});
}
realStop() {
if (process.platform === 'win32') {
return;
}
this.rl.close();
this.rl = undefined;
}
}
let stdinDiscarder;
class Ora {
constructor(options) {
if (!stdinDiscarder) {
stdinDiscarder = new StdinDiscarder();
}
if (typeof options === 'string') {
options = {
text: options
};
}
this.options = {
text: '',
color: 'cyan',
stream: process.stderr,
discardStdin: true,
...options
};
this.spinner = this.options.spinner;
this.color = this.options.color;
this.hideCursor = this.options.hideCursor !== false;
this.interval = this.options.interval || this.spinner.interval || 100;
this.stream = this.options.stream;
this.id = undefined;
this.isEnabled = typeof this.options.isEnabled === 'boolean' ? this.options.isEnabled : isInteractive({stream: this.stream});
// Set *after* `this.stream`
this.text = this.options.text;
this.prefixText = this.options.prefixText;
this.linesToClear = 0;
this.indent = this.options.indent;
this.discardStdin = this.options.discardStdin;
this.isDiscardingStdin = false;
}
get indent() {
return this._indent;
}
set indent(indent = 0) {
if (!(indent >= 0 && Number.isInteger(indent))) {
throw new Error('The `indent` option must be an integer from 0 and up');
}
this._indent = indent;
}
_updateInterval(interval) {
if (interval !== undefined) {
this.interval = interval;
}
}
get spinner() {
return this._spinner;
}
set spinner(spinner) {
this.frameIndex = 0;
if (typeof spinner === 'object') {
if (spinner.frames === undefined) {
throw new Error('The given spinner must have a `frames` property');
}
this._spinner = spinner;
} else if (process.platform === 'win32') {
this._spinner = cliSpinners.line;
} else if (spinner === undefined) {
// Set default spinner
this._spinner = cliSpinners.dots;
} else if (cliSpinners[spinner]) {
this._spinner = cliSpinners[spinner];
} else {
throw new Error(`There is no built-in spinner named '${spinner}'. See https://github.com/sindresorhus/cli-spinners/blob/master/spinners.json for a full list.`);
}
this._updateInterval(this._spinner.interval);
}
get text() {
return this[TEXT];
}
get prefixText() {
return this[PREFIX_TEXT];
}
get isSpinning() {
return this.id !== undefined;
}
updateLineCount() {
const columns = this.stream.columns || 80;
const fullPrefixText = (typeof this[PREFIX_TEXT] === 'string') ? this[PREFIX_TEXT] + '-' : '';
this.lineCount = stripAnsi(fullPrefixText + '--' + this[TEXT]).split('\n').reduce((count, line) => {
return count + Math.max(1, Math.ceil(wcwidth(line) / columns));
}, 0);
}
set text(value) {
this[TEXT] = value;
this.updateLineCount();
}
set prefixText(value) {
this[PREFIX_TEXT] = value;
this.updateLineCount();
}
frame() {
const {frames} = this.spinner;
let frame = frames[this.frameIndex];
if (this.color) {
frame = chalk[this.color](frame);
}
this.frameIndex = ++this.frameIndex % frames.length;
const fullPrefixText = (typeof this.prefixText === 'string' && this.prefixText !== '') ? this.prefixText + ' ' : '';
const fullText = typeof this.text === 'string' ? ' ' + this.text : '';
return fullPrefixText + frame + fullText;
}
clear() {
if (!this.isEnabled || !this.stream.isTTY) {
return this;
}
for (let i = 0; i < this.linesToClear; i++) {
if (i > 0) {
this.stream.moveCursor(0, -1);
}
this.stream.clearLine();
this.stream.cursorTo(this.indent);
}
this.linesToClear = 0;
return this;
}
render() {
this.clear();
this.stream.write(this.frame());
this.linesToClear = this.lineCount;
return this;
}
start(text) {
if (text) {
this.text = text;
}
if (!this.isEnabled) {
if (this.text) {
this.stream.write(`- ${this.text}\n`);
}
return this;
}
if (this.isSpinning) {
return this;
}
if (this.hideCursor) {
cliCursor.hide(this.stream);
}
if (this.discardStdin && process.stdin.isTTY) {
this.isDiscardingStdin = true;
stdinDiscarder.start();
}
this.render();
this.id = setInterval(this.render.bind(this), this.interval);
return this;
}
stop() {
if (!this.isEnabled) {
return this;
}
clearInterval(this.id);
this.id = undefined;
this.frameIndex = 0;
this.clear();
if (this.hideCursor) {
cliCursor.show(this.stream);
}
if (this.discardStdin && process.stdin.isTTY && this.isDiscardingStdin) {
stdinDiscarder.stop();
this.isDiscardingStdin = false;
}
return this;
}
succeed(text) {
return this.stopAndPersist({symbol: logSymbols.success, text});
}
fail(text) {
return this.stopAndPersist({symbol: logSymbols.error, text});
}
warn(text) {
return this.stopAndPersist({symbol: logSymbols.warning, text});
}
info(text) {
return this.stopAndPersist({symbol: logSymbols.info, text});
}
stopAndPersist(options = {}) {
const prefixText = options.prefixText || this.prefixText;
const fullPrefixText = (typeof prefixText === 'string' && prefixText !== '') ? prefixText + ' ' : '';
const text = options.text || this.text;
const fullText = (typeof text === 'string') ? ' ' + text : '';
this.stop();
this.stream.write(`${fullPrefixText}${options.symbol || ' '}${fullText}\n`);
return this;
}
}
const oraFactory = function (options) {
return new Ora(options);
};
module.exports = oraFactory;
module.exports.promise = (action, options) => {
// eslint-disable-next-line promise/prefer-await-to-then
if (typeof action.then !== 'function') {
throw new TypeError('Parameter `action` must be a Promise');
}
const spinner = new Ora(options);
spinner.start();
(async () => {
try {
await action;
spinner.succeed();
} catch (_) {
spinner.fail();
}
})();
return spinner;
};

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