61 lines
1.7 KiB
JavaScript
61 lines
1.7 KiB
JavaScript
/*! arch. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
|
|
var cp = require('child_process')
|
|
var fs = require('fs')
|
|
var path = require('path')
|
|
|
|
/**
|
|
* Returns the operating system's CPU architecture. This is different than
|
|
* `process.arch` or `os.arch()` which returns the architecture the Node.js (or
|
|
* Electron) binary was compiled for.
|
|
*/
|
|
module.exports = function arch () {
|
|
/**
|
|
* The running binary is 64-bit, so the OS is clearly 64-bit.
|
|
*/
|
|
if (process.arch === 'x64') {
|
|
return 'x64'
|
|
}
|
|
|
|
/**
|
|
* All recent versions of Mac OS are 64-bit.
|
|
*/
|
|
if (process.platform === 'darwin') {
|
|
return 'x64'
|
|
}
|
|
|
|
/**
|
|
* On Windows, the most reliable way to detect a 64-bit OS from within a 32-bit
|
|
* app is based on the presence of a WOW64 file: %SystemRoot%\SysNative.
|
|
* See: https://twitter.com/feross/status/776949077208510464
|
|
*/
|
|
if (process.platform === 'win32') {
|
|
var useEnv = false
|
|
try {
|
|
useEnv = !!(process.env.SYSTEMROOT && fs.statSync(process.env.SYSTEMROOT))
|
|
} catch (err) {}
|
|
|
|
var sysRoot = useEnv ? process.env.SYSTEMROOT : 'C:\\Windows'
|
|
|
|
// If %SystemRoot%\SysNative exists, we are in a WOW64 FS Redirected application.
|
|
var isWOW64 = false
|
|
try {
|
|
isWOW64 = !!fs.statSync(path.join(sysRoot, 'sysnative'))
|
|
} catch (err) {}
|
|
|
|
return isWOW64 ? 'x64' : 'x86'
|
|
}
|
|
|
|
/**
|
|
* On Linux, use the `getconf` command to get the architecture.
|
|
*/
|
|
if (process.platform === 'linux') {
|
|
var output = cp.execSync('getconf LONG_BIT', { encoding: 'utf8' })
|
|
return output === '64\n' ? 'x64' : 'x86'
|
|
}
|
|
|
|
/**
|
|
* If none of the above, assume the architecture is 32-bit.
|
|
*/
|
|
return 'x86'
|
|
}
|