improve compile commands

Author: waruqi

assets/update_intellisense.lua

@@ -7,6 +7,8 @@ function main(compileCommandsDirectory)
 
     -- generate compile_commands.json
     -- @note we can only load configuration because we watched onFileChanged(xmake.conf)
+    os.setenv("XMAKE_IN_PROJECT_GENERATOR", "true")
     config.load()
     compile_commands.make(compileCommandsDirectory or ".vscode")
+    os.setenv("XMAKE_IN_PROJECT_GENERATOR", nil)
 end