feat(compat) preload Node.js built-in modules in global vars REPL (#13127)

This commit adds preloading of built-in Node.js modules in
the REPL if running with "deno repl --compat --unstable".

cli/compat/mod.rs

@@ -140,3 +140,18 @@ pub(crate) fn add_global_require(
 fn escape_for_single_quote_string(text: &str) -> String {
   text.replace(r"\", r"\\").replace("'", r"\'")
 }
+
+pub fn setup_builtin_modules(
+  js_runtime: &mut JsRuntime,
+) -> Result<(), AnyError> {
+  let mut script = String::new();
+  for module in SUPPORTED_MODULES {
+    // skipping the modules that contains '/' as they are not available in NodeJS repl as well
+    if !module.contains('/') {
+      script = format!("{}const {} = require('{}');\n", script, module, module);
+    }
+  }
+
+  js_runtime.execute_script("setup_node_builtins.js", &script)?;
+  Ok(())
+}

cli/main.rs

@@ -902,6 +902,8 @@ async fn repl_command(
   if flags.compat {
     worker.execute_side_module(&compat::GLOBAL_URL).await?;
     compat::add_global_require(&mut worker.js_runtime, main_module.as_str())?;
+    worker.run_event_loop(false).await?;
+    compat::setup_builtin_modules(&mut worker.js_runtime)?;
   }
   worker.run_event_loop(false).await?;
 

cli/tests/integration/compat_tests.rs

@@ -132,3 +132,15 @@ fn node_compat_url() {
   assert!(!err.is_empty());
   assert!(err.contains("file:///non_existent/node/global.ts"));
 }
+
+#[test]
+fn native_modules_as_global_vars() {
+  let (out, _err) = util::run_and_collect_output_with_args(
+    true,
+    vec!["repl", "--compat", "--unstable", "--quiet"],
+    Some(vec!["if(cluster && v8 && sys) { true } else { false }"]),
+    None,
+    false,
+  );
+  assert!(out.contains("true"));
+}