152 lines
4.0 KiB
JavaScript
152 lines
4.0 KiB
JavaScript
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/*
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The MIT License (MIT)
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Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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'use strict';
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var os = require('os');
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var hasFlag = require('./has-flag.js');
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var env = process.env;
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var forceColor = void 0;
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if (hasFlag('no-color') || hasFlag('no-colors') || hasFlag('color=false')) {
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forceColor = false;
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} else if (hasFlag('color') || hasFlag('colors') || hasFlag('color=true')
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|| hasFlag('color=always')) {
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forceColor = true;
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}
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if ('FORCE_COLOR' in env) {
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forceColor = env.FORCE_COLOR.length === 0
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|| parseInt(env.FORCE_COLOR, 10) !== 0;
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}
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function translateLevel(level) {
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if (level === 0) {
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return false;
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}
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return {
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level: level,
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hasBasic: true,
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has256: level >= 2,
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has16m: level >= 3,
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};
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}
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function supportsColor(stream) {
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if (forceColor === false) {
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return 0;
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}
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if (hasFlag('color=16m') || hasFlag('color=full')
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|| hasFlag('color=truecolor')) {
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return 3;
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}
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if (hasFlag('color=256')) {
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return 2;
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}
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if (stream && !stream.isTTY && forceColor !== true) {
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return 0;
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}
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var min = forceColor ? 1 : 0;
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if (process.platform === 'win32') {
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// Node.js 7.5.0 is the first version of Node.js to include a patch to
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// libuv that enables 256 color output on Windows. Anything earlier and it
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// won't work. However, here we target Node.js 8 at minimum as it is an LTS
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// release, and Node.js 7 is not. Windows 10 build 10586 is the first
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// Windows release that supports 256 colors. Windows 10 build 14931 is the
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// first release that supports 16m/TrueColor.
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var osRelease = os.release().split('.');
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if (Number(process.versions.node.split('.')[0]) >= 8
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&& Number(osRelease[0]) >= 10 && Number(osRelease[2]) >= 10586) {
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return Number(osRelease[2]) >= 14931 ? 3 : 2;
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}
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return 1;
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}
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if ('CI' in env) {
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if (['TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI'].some(function(sign) {
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return sign in env;
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}) || env.CI_NAME === 'codeship') {
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return 1;
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}
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return min;
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}
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if ('TEAMCITY_VERSION' in env) {
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return (/^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/.test(env.TEAMCITY_VERSION) ? 1 : 0
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);
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}
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if ('TERM_PROGRAM' in env) {
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var version = parseInt((env.TERM_PROGRAM_VERSION || '').split('.')[0], 10);
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switch (env.TERM_PROGRAM) {
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case 'iTerm.app':
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return version >= 3 ? 3 : 2;
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case 'Hyper':
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return 3;
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case 'Apple_Terminal':
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return 2;
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// No default
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}
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}
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if (/-256(color)?$/i.test(env.TERM)) {
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return 2;
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}
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if (/^screen|^xterm|^vt100|^rxvt|color|ansi|cygwin|linux/i.test(env.TERM)) {
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return 1;
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}
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if ('COLORTERM' in env) {
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return 1;
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}
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if (env.TERM === 'dumb') {
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return min;
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}
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return min;
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}
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function getSupportLevel(stream) {
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var level = supportsColor(stream);
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return translateLevel(level);
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}
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module.exports = {
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supportsColor: getSupportLevel,
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stdout: getSupportLevel(process.stdout),
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stderr: getSupportLevel(process.stderr),
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};
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