flow like the river

BACK_BACK/node_modules/ora/index.js

@@ -0,0 +1,190 @@
+'use strict';
+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 TEXT = Symbol('text');
+
+class Ora {
+	constructor(options) {
+		if (typeof options === 'string') {
+			options = {
+				text: options
+			};
+		}
+
+		this.options = Object.assign({
+			text: '',
+			color: 'cyan',
+			stream: process.stderr
+		}, options);
+
+		const sp = this.options.spinner;
+		this.spinner = typeof sp === 'object' ? sp : (process.platform === 'win32' ? cliSpinners.line : (cliSpinners[sp] || cliSpinners.dots)); // eslint-disable-line no-nested-ternary
+
+		if (this.spinner.frames === undefined) {
+			throw new Error('Spinner must define `frames`');
+		}
+
+		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 = null;
+		this.frameIndex = 0;
+		this.enabled = typeof this.options.enabled === 'boolean' ? this.options.enabled : ((this.stream && this.stream.isTTY) && !process.env.CI);
+
+		// Set *after* `this.stream`
+		this.text = this.options.text;
+		this.linesToClear = 0;
+	}
+
+	get text() {
+		return this[TEXT];
+	}
+
+	get isSpinning() {
+		return this.id !== null;
+	}
+
+	set text(value) {
+		this[TEXT] = value;
+		const columns = this.stream.columns || 80;
+		this.lineCount = stripAnsi('--' + value).split('\n').reduce((count, line) => {
+			return count + Math.max(1, Math.ceil(wcwidth(line) / columns));
+		}, 0);
+	}
+
+	frame() {
+		const frames = this.spinner.frames;
+		let frame = frames[this.frameIndex];
+
+		if (this.color) {
+			frame = chalk[this.color](frame);
+		}
+
+		this.frameIndex = ++this.frameIndex % frames.length;
+
+		return frame + ' ' + this.text;
+	}
+
+	clear() {
+		if (!this.enabled) {
+			return this;
+		}
+
+		for (let i = 0; i < this.linesToClear; i++) {
+			if (i > 0) {
+				this.stream.moveCursor(0, -1);
+			}
+			this.stream.clearLine();
+			this.stream.cursorTo(0);
+		}
+		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.enabled || this.isSpinning) {
+			return this;
+		}
+
+		if (this.hideCursor) {
+			cliCursor.hide(this.stream);
+		}
+		this.render();
+		this.id = setInterval(this.render.bind(this), this.interval);
+
+		return this;
+	}
+
+	stop() {
+		if (!this.enabled) {
+			return this;
+		}
+
+		clearInterval(this.id);
+		this.id = null;
+		this.frameIndex = 0;
+		this.clear();
+		if (this.hideCursor) {
+			cliCursor.show(this.stream);
+		}
+
+		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) {
+		if (!this.enabled) {
+			return this;
+		}
+
+		// TODO: Remove in the next major version
+		if (typeof options === 'string') {
+			throw new TypeError('This argument now accepts an options object, not a string');
+		}
+
+		options = options || {};
+
+		this.stop();
+		this.stream.write(`${options.symbol || ' '} ${options.text || this.text}\n`);
+
+		return this;
+	}
+}
+
+module.exports = function (opts) {
+	return new Ora(opts);
+};
+
+module.exports.promise = (action, options) => {
+	if (typeof action.then !== 'function') {
+		throw new TypeError('Parameter `action` must be a Promise');
+	}
+
+	const spinner = new Ora(options);
+	spinner.start();
+
+	action.then(
+		() => {
+			spinner.succeed();
+		},
+		() => {
+			spinner.fail();
+		}
+	);
+
+	return spinner;
+};