fix: add message about restarting the shell

src/main.ts

@@ -184,6 +184,24 @@ export async function main(args: string[]): Promise<number> {
   errorMessages.forEach((tool) => error(tool))
 
   core.info("setup_cpp finished")
+
+  if (!isCI()) {
+    switch (process.platform) {
+      case "win32": {
+        core.info("Run `RefreshEnv.cmd` or restart your shell to update the environment.")
+        break
+      }
+      case "linux":
+      case "darwin": {
+        core.info("Run `source ~/.profile` or restart your shell to update the environment.")
+        break
+      }
+      default: {
+        // nothing
+      }
+    }
+  }
+
   return errorMessages.length === 0 ? 0 : 1 // exit with non-zero if any error message
 }
 // Run main