73 lines
1.8 KiB
JavaScript
73 lines
1.8 KiB
JavaScript
|
var isWindows = process.platform === 'win32'
|
||
|
|
var path = require('path')
|
||
|
|
var exec = require('child_process').exec
|
||
|
|
var osTmpdir = require('os-tmpdir')
|
||
|
|
var osHomedir = require('os-homedir')
|
||
|
|
|
||
|
|
// looking up envs is a bit costly.
|
||
|
|
// Also, sometimes we want to have a fallback
|
||
|
|
// Pass in a callback to wait for the fallback on failures
|
||
|
|
// After the first lookup, always returns the same thing.
|
||
|
|
function memo (key, lookup, fallback) {
|
||
|
|
var fell = false
|
||
|
|
var falling = false
|
||
|
|
exports[key] = function (cb) {
|
||
|
|
var val = lookup()
|
||
|
|
if (!val && !fell && !falling && fallback) {
|
||
|
|
fell = true
|
||
|
|
falling = true
|
||
|
|
exec(fallback, function (er, output, stderr) {
|
||
|
|
falling = false
|
||
|
|
if (er) return // oh well, we tried
|
||
|
|
val = output.trim()
|
||
|
|
})
|
||
|
|
}
|
||
|
|
exports[key] = function (cb) {
|
||
|
|
if (cb) process.nextTick(cb.bind(null, null, val))
|
||
|
|
return val
|
||
|
|
}
|
||
|
|
if (cb && !falling) process.nextTick(cb.bind(null, null, val))
|
||
|
|
return val
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
memo('user', function () {
|
||
|
|
return ( isWindows
|
||
|
|
? process.env.USERDOMAIN + '\\' + process.env.USERNAME
|
||
|
|
: process.env.USER
|
||
|
|
)
|
||
|
|
}, 'whoami')
|
||
|
|
|
||
|
|
memo('prompt', function () {
|
||
|
|
return isWindows ? process.env.PROMPT : process.env.PS1
|
||
|
|
})
|
||
|
|
|
||
|
|
memo('hostname', function () {
|
||
|
|
return isWindows ? process.env.COMPUTERNAME : process.env.HOSTNAME
|
||
|
|
}, 'hostname')
|
||
|
|
|
||
|
|
memo('tmpdir', function () {
|
||
|
|
return osTmpdir()
|
||
|
|
})
|
||
|
|
|
||
|
|
memo('home', function () {
|
||
|
|
return osHomedir()
|
||
|
|
})
|
||
|
|
|
||
|
|
memo('path', function () {
|
||
|
|
return (process.env.PATH ||
|
||
|
|
process.env.Path ||
|
||
|
|
process.env.path).split(isWindows ? ';' : ':')
|
||
|
|
})
|
||
|
|
|
||
|
|
memo('editor', function () {
|
||
|
|
return process.env.EDITOR ||
|
||
|
|
process.env.VISUAL ||
|
||
|
|
(isWindows ? 'notepad.exe' : 'vi')
|
||
|
|
})
|
||
|
|
|
||
|
|
memo('shell', function () {
|
||
|
|
return isWindows ? process.env.ComSpec || 'cmd'
|
||
|
|
: process.env.SHELL || 'bash'
|
||
|
|
})
|