// call it on itself so we can test the export val for basic stuff
|
module.exports = colorSupport({ alwaysReturn: true }, colorSupport)
|
|
function hasNone (obj, options) {
|
obj.level = 0
|
obj.hasBasic = false
|
obj.has256 = false
|
obj.has16m = false
|
if (!options.alwaysReturn) {
|
return false
|
}
|
return obj
|
}
|
|
function hasBasic (obj) {
|
obj.hasBasic = true
|
obj.has256 = false
|
obj.has16m = false
|
obj.level = 1
|
return obj
|
}
|
|
function has256 (obj) {
|
obj.hasBasic = true
|
obj.has256 = true
|
obj.has16m = false
|
obj.level = 2
|
return obj
|
}
|
|
function has16m (obj) {
|
obj.hasBasic = true
|
obj.has256 = true
|
obj.has16m = true
|
obj.level = 3
|
return obj
|
}
|
|
function colorSupport (options, obj) {
|
options = options || {}
|
|
obj = obj || {}
|
|
// if just requesting a specific level, then return that.
|
if (typeof options.level === 'number') {
|
switch (options.level) {
|
case 0:
|
return hasNone(obj, options)
|
case 1:
|
return hasBasic(obj)
|
case 2:
|
return has256(obj)
|
case 3:
|
return has16m(obj)
|
}
|
}
|
|
obj.level = 0
|
obj.hasBasic = false
|
obj.has256 = false
|
obj.has16m = false
|
|
if (typeof process === 'undefined' ||
|
!process ||
|
!process.stdout ||
|
!process.env ||
|
!process.platform) {
|
return hasNone(obj, options)
|
}
|
|
var env = options.env || process.env
|
var stream = options.stream || process.stdout
|
var term = options.term || env.TERM || ''
|
var platform = options.platform || process.platform
|
|
if (!options.ignoreTTY && !stream.isTTY) {
|
return hasNone(obj, options)
|
}
|
|
if (!options.ignoreDumb && term === 'dumb' && !env.COLORTERM) {
|
return hasNone(obj, options)
|
}
|
|
if (platform === 'win32') {
|
return hasBasic(obj)
|
}
|
|
if (env.TMUX) {
|
return has256(obj)
|
}
|
|
if (!options.ignoreCI && (env.CI || env.TEAMCITY_VERSION)) {
|
if (env.TRAVIS) {
|
return has256(obj)
|
} else {
|
return hasNone(obj, options)
|
}
|
}
|
|
// TODO: add more term programs
|
switch (env.TERM_PROGRAM) {
|
case 'iTerm.app':
|
var ver = env.TERM_PROGRAM_VERSION || '0.'
|
if (/^[0-2]\./.test(ver)) {
|
return has256(obj)
|
} else {
|
return has16m(obj)
|
}
|
|
case 'HyperTerm':
|
case 'Hyper':
|
return has16m(obj)
|
|
case 'MacTerm':
|
return has16m(obj)
|
|
case 'Apple_Terminal':
|
return has256(obj)
|
}
|
|
if (/^xterm-256/.test(term)) {
|
return has256(obj)
|
}
|
|
if (/^screen|^xterm|^vt100|color|ansi|cygwin|linux/i.test(term)) {
|
return hasBasic(obj)
|
}
|
|
if (env.COLORTERM) {
|
return hasBasic(obj)
|
}
|
|
return hasNone(obj, options)
|
}
|
