flynx/colors.js
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Update supports-colors.js

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paladox 2018-02-14 01:09:26 +00:00 committed by GitHub
parent 2c38a68a7c
commit 007f4d1cd5
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1 changed files with 25 additions and 82 deletions
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lib/system/supports-colors.js
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@ -24,27 +24,9 @@ THE SOFTWARE.
*/ */
'use strict'; 'use strict';
var os = require('os');
var hasFlag = require('./has-flag.js'); var hasFlag = require('./has-flag.js');
var env = process.env; var support = function (level) {
var forceColor;
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) { if (level === 0) {
return false; return false;
} }
@ -55,10 +37,12 @@ function translateLevel(level) {
has256: level >= 2, has256: level >= 2,
has16m: level >= 3 has16m: level >= 3
}; };
} };
function supportsColor(stream) { var supportLevel = (function () {
if (forceColor === false) { if (hasFlag('no-color') ||
hasFlag('no-colors') ||
hasFlag('color=false')) {
return 0; return 0;
} }
@ -72,83 +56,42 @@ function supportsColor(stream) {
return 2; return 2;
} }
if (stream && !stream.isTTY && forceColor !== true) { if (hasFlag('color') ||
hasFlag('colors') ||
hasFlag('color=true') ||
hasFlag('color=always')) {
return 1;
}
if (process.stdout && !process.stdout.isTTY) {
return 0; return 0;
} }
var min = forceColor ? 1 : 0;
if (process.platform === 'win32') { 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; return 1;
} }
if ('CI' in env) { if ('COLORTERM' in process.env) {
if (['TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI'].some(sign => sign in env) || env.CI_NAME === 'codeship') {
return 1; return 1;
} }
return min; if (process.env.TERM === 'dumb') {
return 0;
} }
if ('TEAMCITY_VERSION' in env) { if (/^xterm-256(?:color)?/.test(process.env.TERM)) {
return /^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/.test(env.TEAMCITY_VERSION) ? 1 : 0;
}
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; return 2;
} }
if (/^screen|^xterm|^vt100|^rxvt|color|ansi|cygwin|linux/i.test(env.TERM)) { if (/^screen|^xterm|^vt100|color|ansi|cygwin|linux/i.test(process.env.TERM)) {
return 1; return 1;
} }
if ('COLORTERM' in env) { return 0;
return 1; })();
if (supportLevel === 0 && 'FORCE_COLOR' in process.env) {
supportLevel = 1;
} }
if (env.TERM === 'dumb') { module.exports = process && support(supportLevel);
return min;
}
return min;
}
function getSupportLevel(stream) {
var level = supportsColor(stream);
return translateLevel(level);
}
module.exports = {
supportsColor: getSupportLevel,
stdout: getSupportLevel(process.stdout),
stderr: getSupportLevel(process.stderr)
};