altered bindings.gyp to use DOKAN_INSTALL_DIR env var

abstractions.cc

@@ -39,7 +39,7 @@ void thread_join (HANDLE thread) {
 
 void fusermount (char *path) {
     char cmdLine[MAX_PATH];
-    sprintf(cmdLine, "\"C:\\Program Files\\Dokan\\DokanLibrary\\dokanctl.exe\" /u %s", path);
+    sprintf(cmdLine, "\"%s/dokanctl.exe\" /u %s", DOKAN_INSTALL_DIR, path);
 
     STARTUPINFO info = {sizeof(info)};
     PROCESS_INFORMATION procInfo;

binding.gyp

@@ -17,13 +17,20 @@
                 }
             }],
             ['OS=="win"', {
+                "variables": {
+                    "dokan_install_path%": "<!(echo %DOKAN_INSTALL_DIR%)"
+                },
+                "defines": [
+                    ["DOKAN_INSTALL_DIR",
+                        "<!(node -e \"process.stdout.write(JSON.stringify(process.argv[1]))\" -- \"<(dokan_install_path)\")"]
+                ],
                 "include_dirs": [
                     "$(DOKAN_FUSE_INCLUDE)",
                     "$(INCLUDE)"
                 ],
                 "link_settings": {
                     "libraries": [
-                        "C:\\Program Files\\Dokan\\DokanLibrary\\dokanfuse.lib"
+                        "<(dokan_install_path)/dokanfuse.lib"
                     ]
                 }
             }]