1f9b4fb4c8
This patch: - changes `let` into `const` throughout codebase - adds eslint check to prefer const over let
119 lines
2.6 KiB
JavaScript
119 lines
2.6 KiB
JavaScript
/**
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* Copyright 2017 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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const readline = require('readline');
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const await = require('./utilities').await;
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const os = require('os');
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class System {
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/**
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* @param {!Array<string>} args
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*/
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constructor(args) {
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this.args = args;
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this.env = {};
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Object.assign(this.env, process.env);
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this.stdin = new StandardInput(process.stdin);
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this.stdout = new StandardOutput(process.stdout);
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this.stderr = new StandardOutput(process.stderr);
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this.platform = 'phantomjs';
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this.pid = process.pid;
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this.isSSLSupported = false;
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this.os = {
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architecture: os.arch(),
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name: os.type(),
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version: os.release()
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};
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}
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}
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class StandardInput {
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/**
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* @param {!Readable} readableStream
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*/
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constructor(readableStream) {
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this._readline = readline.createInterface({
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input: readableStream
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});
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this._lines = [];
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this._closed = false;
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this._readline.on('line', line => this._lines.push(line));
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this._readline.on('close', () => this._closed = true);
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}
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/**
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* @return {string}
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*/
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readLine() {
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if (this._closed && !this._lines.length)
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return '';
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if (!this._lines.length) {
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const linePromise = new Promise(fulfill => this._readline.once('line', fulfill));
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await(linePromise);
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}
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return this._lines.shift();
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}
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/**
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* @return {string}
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*/
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read() {
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if (!this._closed) {
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const closePromise = new Promise(fulfill => this._readline.once('close', fulfill));
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await(closePromise);
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}
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const text = this._lines.join('\n');
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this._lines = [];
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return text;
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}
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close() {
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this._readline.close();
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}
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}
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class StandardOutput {
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/**
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* @param {!Writable} writableStream
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*/
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constructor(writableStream) {
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this._stream = writableStream;
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}
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/**
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* @param {string} data
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*/
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write(data) {
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this._stream.write(data);
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}
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/**
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* @param {string} data
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*/
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writeLine(data) {
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this._stream.write(data + '\n');
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}
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flush() {
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}
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close() {
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this._stream.end();
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}
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}
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module.exports = System;
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