flynx/colors.js
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Update supports-colors.js

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paladox 2018-02-14 02:11:16 +00:00 committed by GitHub
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commit e90c3c5088
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1 changed files with 78 additions and 28 deletions
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106
lib/system/supports-colors.js
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@ -24,9 +24,23 @@ THE SOFTWARE.
*/
'use strict';
var os = require('os');
var hasFlag = require('./has-flag.js');
var support = function (level) {
var env = process.env;
var forceColor = void 0;
if (hasFlag('no-color') || hasFlag('no-colors') || hasFlag('color=false')) {
forceColor = false;
} else if (hasFlag('color') || hasFlag('colors') || hasFlag('color=true') || hasFlag('color=always')) {
forceColor = true;
}
if ('FORCE_COLOR' in env) {
forceColor = env.FORCE_COLOR.length === 0 || parseInt(env.FORCE_COLOR, 10) !== 0;
}
function translateLevel(level) {
if (level === 0) {
return false;
}
@ -37,18 +51,14 @@ var support = function (level) {
has256: level >= 2,
has16m: level >= 3
};
};
}
var supportLevel = (function () {
if (hasFlag('no-color') ||
hasFlag('no-colors') ||
hasFlag('color=false')) {
function supportsColor(stream) {
if (forceColor === false) {
return 0;
}
if (hasFlag('color=16m') ||
hasFlag('color=full') ||
hasFlag('color=truecolor')) {
if (hasFlag('color=16m') || hasFlag('color=full') || hasFlag('color=truecolor')) {
return 3;
}
@ -56,42 +66,82 @@ var supportLevel = (function () {
return 2;
}
if (hasFlag('color') ||
hasFlag('colors') ||
hasFlag('color=true') ||
hasFlag('color=always')) {
return 1;
}
if (process.stdout && !process.stdout.isTTY) {
if (stream && !stream.isTTY && forceColor !== true) {
return 0;
}
var min = forceColor ? 1 : 0;
if (process.platform === 'win32') {
// Node.js 7.5.0 is the first version of Node.js to include a patch to
// libuv that enables 256 color output on Windows. Anything earlier and it
// won't work. However, here we target Node.js 8 at minimum as it is an LTS
// release, and Node.js 7 is not. Windows 10 build 10586 is the first Windows
// release that supports 256 colors. Windows 10 build 14931 is the first release
// that supports 16m/TrueColor.
var osRelease = os.release().split('.');
if (Number(process.versions.node.split('.')[0]) >= 8 && Number(osRelease[0]) >= 10 && Number(osRelease[2]) >= 10586) {
return Number(osRelease[2]) >= 14931 ? 3 : 2;
}
return 1;
}
if ('COLORTERM' in process.env) {
return 1;
if ('CI' in env) {
if (['TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI'].some(function (sign) {
return sign in env;
}) || env.CI_NAME === 'codeship') {
return 1;
}
return min;
}
if (process.env.TERM === 'dumb') {
return 0;
if ('TEAMCITY_VERSION' in env) {
return (/^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/.test(env.TEAMCITY_VERSION) ? 1 : 0
);
}
if (/^xterm-256(?:color)?/.test(process.env.TERM)) {
if ('TERM_PROGRAM' in env) {
var version = parseInt((env.TERM_PROGRAM_VERSION || '').split('.')[0], 10);
switch (env.TERM_PROGRAM) {
case 'iTerm.app':
return version >= 3 ? 3 : 2;
case 'Hyper':
return 3;
case 'Apple_Terminal':
return 2;
// No default
}
}
if (/-256(color)?$/i.test(env.TERM)) {
return 2;
}
if (/^screen|^xterm|^vt100|color|ansi|cygwin|linux/i.test(process.env.TERM)) {
if (/^screen|^xterm|^vt100|^rxvt|color|ansi|cygwin|linux/i.test(env.TERM)) {
return 1;
}
return 0;
})();
if ('COLORTERM' in env) {
return 1;
}
if (supportLevel === 0 && 'FORCE_COLOR' in process.env) {
supportLevel = 1;
if (env.TERM === 'dumb') {
return min;
}
return min;
}
module.exports = process && support(supportLevel);
function getSupportLevel(stream) {
var level = supportsColor(stream);
return translateLevel(level);
}
module.exports = {
supportsColor: getSupportLevel,
stdout: getSupportLevel(process.stdout),
stderr: getSupportLevel(process.stderr)
};