wishthis/node_modules/homedir-polyfill/polyfill.js

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2022-01-21 08:28:41 +00:00
'use strict';
var fs = require('fs');
var parse = require('parse-passwd');
function homedir() {
// The following logic is from looking at logic used in the different platform
// versions of the uv_os_homedir function found in https://github.com/libuv/libuv
// This is the function used in modern versions of node.js
if (process.platform === 'win32') {
// check the USERPROFILE first
if (process.env.USERPROFILE) {
return process.env.USERPROFILE;
}
// check HOMEDRIVE and HOMEPATH
if (process.env.HOMEDRIVE && process.env.HOMEPATH) {
return process.env.HOMEDRIVE + process.env.HOMEPATH;
}
// fallback to HOME
if (process.env.HOME) {
return process.env.HOME;
}
return null;
}
// check HOME environment variable first
if (process.env.HOME) {
return process.env.HOME;
}
// on linux platforms (including OSX) find the current user and get their homedir from the /etc/passwd file
var passwd = tryReadFileSync('/etc/passwd');
var home = find(parse(passwd), getuid());
if (home) {
return home;
}
// fallback to using user environment variables
var user = process.env.LOGNAME || process.env.USER || process.env.LNAME || process.env.USERNAME;
if (!user) {
return null;
}
if (process.platform === 'darwin') {
return '/Users/' + user;
}
return '/home/' + user;
}
function find(arr, uid) {
var len = arr.length;
for (var i = 0; i < len; i++) {
if (+arr[i].uid === uid) {
return arr[i].homedir;
}
}
}
function getuid() {
if (typeof process.geteuid === 'function') {
return process.geteuid();
}
return process.getuid();
}
function tryReadFileSync(fp) {
try {
return fs.readFileSync(fp, 'utf8');
} catch (err) {
return '';
}
}
module.exports = homedir;