added unit testing, and started implementing unit tests...phew

node_modules/homedir-polyfill/polyfill.js

@@ -0,0 +1,81 @@
+'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;
+