module: fix loading from global folders on Windows

Code was calculating $PREFIX/lib/node relative to process.execPath, but on Windows process.execPath is $PREFIX\node.exe whereas everywhere else process.execPath is $PREFIX/bin/node (where $PREFIX is the root of the installed Node.js). PR-URL: #9283 Reviewed-By: Sam Roberts <[email protected]> Reviewed-By: Gibson Fahnestock <[email protected]> Reviewed-By: João Reis <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]>

Author: richardlau

lib/module.js

@@ -453,7 +453,16 @@ Module._initPaths = function(){
 homeDir=process.env.HOME;
 }
 
-varpaths=[path.resolve(process.execPath,'..','..','lib','node')];
+// $PREFIX/lib/node, where $PREFIX is the root of the Node.js installation.
+varprefixDir;
+// process.execPath is $PREFIX/bin/node except on Windows where it is
+// $PREFIX\node.exe.
+if(isWindows){
+prefixDir=path.resolve(process.execPath,'..');
+}else{
+prefixDir=path.resolve(process.execPath,'..','..');
+}
+varpaths=[path.resolve(prefixDir,'lib','node')];
 
 if(homeDir){
 paths.unshift(path.resolve(homeDir,'.node_libraries'));