refactor(cli): consolidate most MainWorker related code to the same place (#15459)

6 files changed, 621 insertions, 539 deletions

diff --git a/cli/args/mod.rs b/cli/args/mod.rs
index 7c1502ad6..ecbc53db7 100644
--- a/cli/args/mod.rs
+++ b/cli/args/mod.rs
@@ -335,6 +335,20 @@ impl CliOptions {
     &self.flags.subcommand
   }
 
+  pub fn trace_ops(&self) -> bool {
+    match self.sub_command() {
+      DenoSubcommand::Test(flags) => flags.trace_ops,
+      _ => false,
+    }
+  }
+
+  pub fn shuffle_tests(&self) -> Option<u64> {
+    match self.sub_command() {
+      DenoSubcommand::Test(flags) => flags.shuffle,
+      _ => None,
+    }
+  }
+
   pub fn type_check_mode(&self) -> TypeCheckMode {
     self.flags.type_check_mode
   }
diff --git a/cli/lsp/testing/execution.rs b/cli/lsp/testing/execution.rs
index de74de40e..dde834221 100644
--- a/cli/lsp/testing/execution.rs
+++ b/cli/lsp/testing/execution.rs
@@ -8,7 +8,6 @@ use crate::args::flags_from_vec;
 use crate::args::DenoSubcommand;
 use crate::checksum;
 use crate::create_main_worker;
-use crate::located_script_name;
 use crate::lsp::client::Client;
 use crate::lsp::client::TestingNotification;
 use crate::lsp::config;
@@ -166,39 +165,7 @@ async fn test_specifier(
         stderr: StdioPipe::File(sender.stderr()),
       },
     );
-
-    worker.js_runtime.execute_script(
-      &located_script_name!(),
-      r#"Deno[Deno.internal].enableTestAndBench()"#,
-    )?;
-
-    worker
-      .execute_script(
-        &located_script_name!(),
-        "Deno.core.enableOpCallTracing();",
-      )
-      .unwrap();
-
-    if mode != test::TestMode::Documentation {
-      worker.execute_side_module(&specifier).await?;
-    }
-
-    worker.dispatch_load_event(&located_script_name!())?;
-
-    let test_result = worker.js_runtime.execute_script(
-      &located_script_name!(),
-      r#"Deno[Deno.internal].runTests()"#,
-    )?;
-
-    worker.js_runtime.resolve_value(test_result).await?;
-
-    loop {
-      if !worker.dispatch_beforeunload_event(&located_script_name!())? {
-        break;
-      }
-      worker.run_event_loop(false).await?;
-    }
-    worker.dispatch_unload_event(&located_script_name!())?;
+    worker.run_lsp_test_specifier(mode).await?;
   }
 
   Ok(())
diff --git a/cli/main.rs b/cli/main.rs
index 8489a5f2f..de89c7e12 100644
--- a/cli/main.rs
+++ b/cli/main.rs
@@ -35,6 +35,7 @@ mod tsc;
 mod unix_util;
 mod version;
 mod windows_util;
+mod worker;
 
 use crate::args::flags_from_vec;
 use crate::args::BenchFlags;
@@ -67,7 +68,6 @@ use crate::file_watcher::ResolutionResult;
 use crate::fmt_errors::format_js_error;
 use crate::graph_util::graph_lock_or_exit;
 use crate::graph_util::graph_valid;
-use crate::module_loader::CliModuleLoader;
 use crate::proc_state::ProcState;
 use crate::resolver::ImportMapResolver;
 use crate::resolver::JsxResolver;
@@ -78,26 +78,16 @@ use deno_core::error::generic_error;
 use deno_core::error::AnyError;
 use deno_core::error::JsError;
 use deno_core::futures::future::FutureExt;
-use deno_core::futures::future::LocalFutureObj;
 use deno_core::futures::Future;
-use deno_core::located_script_name;
 use deno_core::parking_lot::RwLock;
 use deno_core::resolve_url_or_path;
 use deno_core::serde_json;
 use deno_core::serde_json::json;
 use deno_core::v8_set_flags;
-use deno_core::Extension;
 use deno_core::ModuleSpecifier;
 use deno_runtime::colors;
-use deno_runtime::ops::worker_host::CreateWebWorkerCb;
-use deno_runtime::ops::worker_host::PreloadModuleCb;
 use deno_runtime::permissions::Permissions;
 use deno_runtime::tokio_util::run_local;
-use deno_runtime::web_worker::WebWorker;
-use deno_runtime::web_worker::WebWorkerOptions;
-use deno_runtime::worker::MainWorker;
-use deno_runtime::worker::WorkerOptions;
-use deno_runtime::BootstrapOptions;
 use log::debug;
 use log::info;
 use std::env;
@@ -107,167 +97,7 @@ use std::iter::once;
 use std::path::PathBuf;
 use std::pin::Pin;
 use std::sync::Arc;
-
-fn create_web_worker_preload_module_callback(
-  ps: ProcState,
-) -> Arc<PreloadModuleCb> {
-  let compat = ps.options.compat();
-
-  Arc::new(move |mut worker| {
-    let fut = async move {
-      if compat {
-        worker.execute_side_module(&compat::GLOBAL_URL).await?;
-        worker.execute_side_module(&compat::MODULE_URL).await?;
-      }
-
-      Ok(worker)
-    };
-    LocalFutureObj::new(Box::new(fut))
-  })
-}
-
-fn create_web_worker_callback(
-  ps: ProcState,
-  stdio: deno_runtime::ops::io::Stdio,
-) -> Arc<CreateWebWorkerCb> {
-  Arc::new(move |args| {
-    let maybe_inspector_server = ps.maybe_inspector_server.clone();
-
-    let module_loader = CliModuleLoader::new_for_worker(
-      ps.clone(),
-      args.parent_permissions.clone(),
-    );
-    let create_web_worker_cb =
-      create_web_worker_callback(ps.clone(), stdio.clone());
-    let preload_module_cb =
-      create_web_worker_preload_module_callback(ps.clone());
-
-    let extensions = ops::cli_exts(ps.clone());
-
-    let options = WebWorkerOptions {
-      bootstrap: BootstrapOptions {
-        args: ps.options.argv().clone(),
-        cpu_count: std::thread::available_parallelism()
-          .map(|p| p.get())
-          .unwrap_or(1),
-        debug_flag: ps
-          .options
-          .log_level()
-          .map_or(false, |l| l == log::Level::Debug),
-        enable_testing_features: ps.options.enable_testing_features(),
-        location: Some(args.main_module.clone()),
-        no_color: !colors::use_color(),
-        is_tty: colors::is_tty(),
-        runtime_version: version::deno(),
-        ts_version: version::TYPESCRIPT.to_string(),
-        unstable: ps.options.unstable(),
-        user_agent: version::get_user_agent(),
-      },
-      extensions,
-      unsafely_ignore_certificate_errors: ps
-        .options
-        .unsafely_ignore_certificate_errors()
-        .map(ToOwned::to_owned),
-      root_cert_store: Some(ps.root_cert_store.clone()),
-      seed: ps.options.seed(),
-      create_web_worker_cb,
-      preload_module_cb,
-      format_js_error_fn: Some(Arc::new(format_js_error)),
-      source_map_getter: Some(Box::new(module_loader.clone())),
-      module_loader,
-      worker_type: args.worker_type,
-      maybe_inspector_server,
-      get_error_class_fn: Some(&errors::get_error_class_name),
-      blob_store: ps.blob_store.clone(),
-      broadcast_channel: ps.broadcast_channel.clone(),
-      shared_array_buffer_store: Some(ps.shared_array_buffer_store.clone()),
-      compiled_wasm_module_store: Some(ps.compiled_wasm_module_store.clone()),
-      stdio: stdio.clone(),
-    };
-
-    WebWorker::bootstrap_from_options(
-      args.name,
-      args.permissions,
-      args.main_module,
-      args.worker_id,
-      options,
-    )
-  })
-}
-
-pub fn create_main_worker(
-  ps: &ProcState,
-  main_module: ModuleSpecifier,
-  permissions: Permissions,
-  mut custom_extensions: Vec<Extension>,
-  stdio: deno_runtime::ops::io::Stdio,
-) -> MainWorker {
-  let module_loader = CliModuleLoader::new(ps.clone());
-
-  let maybe_inspector_server = ps.maybe_inspector_server.clone();
-  let should_break_on_first_statement = ps.options.inspect_brk().is_some();
-
-  let create_web_worker_cb =
-    create_web_worker_callback(ps.clone(), stdio.clone());
-  let web_worker_preload_module_cb =
-    create_web_worker_preload_module_callback(ps.clone());
-
-  let maybe_storage_key = ps.options.resolve_storage_key(&main_module);
-  let origin_storage_dir = maybe_storage_key.map(|key| {
-    ps.dir
-      .root
-      // TODO(@crowlKats): change to origin_data for 2.0
-      .join("location_data")
-      .join(checksum::gen(&[key.as_bytes()]))
-  });
-
-  let mut extensions = ops::cli_exts(ps.clone());
-  extensions.append(&mut custom_extensions);
-
-  let options = WorkerOptions {
-    bootstrap: BootstrapOptions {
-      args: ps.options.argv().clone(),
-      cpu_count: std::thread::available_parallelism()
-        .map(|p| p.get())
-        .unwrap_or(1),
-      debug_flag: ps
-        .options
-        .log_level()
-        .map_or(false, |l| l == log::Level::Debug),
-      enable_testing_features: ps.options.enable_testing_features(),
-      location: ps.options.location_flag().map(ToOwned::to_owned),
-      no_color: !colors::use_color(),
-      is_tty: colors::is_tty(),
-      runtime_version: version::deno(),
-      ts_version: version::TYPESCRIPT.to_string(),
-      unstable: ps.options.unstable(),
-      user_agent: version::get_user_agent(),
-    },
-    extensions,
-    unsafely_ignore_certificate_errors: ps
-      .options
-      .unsafely_ignore_certificate_errors()
-      .map(ToOwned::to_owned),
-    root_cert_store: Some(ps.root_cert_store.clone()),
-    seed: ps.options.seed(),
-    source_map_getter: Some(Box::new(module_loader.clone())),
-    format_js_error_fn: Some(Arc::new(format_js_error)),
-    create_web_worker_cb,
-    web_worker_preload_module_cb,
-    maybe_inspector_server,
-    should_break_on_first_statement,
-    module_loader,
-    get_error_class_fn: Some(&errors::get_error_class_name),
-    origin_storage_dir,
-    blob_store: ps.blob_store.clone(),
-    broadcast_channel: ps.broadcast_channel.clone(),
-    shared_array_buffer_store: Some(ps.shared_array_buffer_store.clone()),
-    compiled_wasm_module_store: Some(ps.compiled_wasm_module_store.clone()),
-    stdio,
-  };
-
-  MainWorker::bootstrap_from_options(main_module, permissions, options)
-}
+use worker::create_main_worker;
 
 pub fn write_to_stdout_ignore_sigpipe(
   bytes: &[u8],
@@ -479,13 +309,13 @@ async fn install_command(
   let main_module = resolve_url_or_path(&install_flags.module_url)?;
   let mut worker = create_main_worker(
     &ps,
-    main_module.clone(),
+    main_module,
     permissions,
     vec![],
     Default::default(),
   );
   // First, fetch and compile the module; this step ensures that the module exists.
-  worker.preload_main_module(&main_module).await?;
+  worker.preload_main_module().await?;
   tools::installer::install(flags, install_flags)?;
   Ok(0)
 }
@@ -593,21 +423,8 @@ async fn eval_command(
   // Save our fake file into file fetcher cache
   // to allow module access by TS compiler.
   ps.file_fetcher.insert_cached(file);
-  debug!("main_module {}", &main_module);
-  if ps.options.compat() {
-    worker.execute_side_module(&compat::GLOBAL_URL).await?;
-  }
-  worker.execute_main_module(&main_module).await?;
-  worker.dispatch_load_event(&located_script_name!())?;
-  loop {
-    worker.run_event_loop(false).await?;
-
-    if !worker.dispatch_beforeunload_event(&located_script_name!())? {
-      break;
-    }
-  }
-  worker.dispatch_unload_event(&located_script_name!())?;
-  Ok(0)
+  let exit_code = worker.run().await?;
+  Ok(exit_code)
 }
 
 async fn create_graph_and_maybe_check(
@@ -868,15 +685,14 @@ async fn repl_command(
     vec![],
     Default::default(),
   );
-  if ps.options.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?;
-
-  tools::repl::run(&ps, worker, repl_flags.eval_files, repl_flags.eval).await
+  worker.setup_repl().await?;
+  tools::repl::run(
+    &ps,
+    worker.into_main_worker(),
+    repl_flags.eval_files,
+    repl_flags.eval,
+  )
+  .await
 }
 
 async fn run_from_stdin(flags: Flags) -> Result<i32, AnyError> {
@@ -905,88 +721,13 @@ async fn run_from_stdin(flags: Flags) -> Result<i32, AnyError> {
   // to allow module access by TS compiler
   ps.file_fetcher.insert_cached(source_file);
 
-  debug!("main_module {}", main_module);
-  if ps.options.compat() {
-    worker.execute_side_module(&compat::GLOBAL_URL).await?;
-  }
-  worker.execute_main_module(&main_module).await?;
-  worker.dispatch_load_event(&located_script_name!())?;
-  loop {
-    worker.run_event_loop(false).await?;
-    if !worker.dispatch_beforeunload_event(&located_script_name!())? {
-      break;
-    }
-  }
-  worker.dispatch_unload_event(&located_script_name!())?;
-  Ok(worker.get_exit_code())
+  let exit_code = worker.run().await?;
+  Ok(exit_code)
 }
 
 // TODO(bartlomieju): this function is not handling `exit_code` set by the runtime
 // code properly.
 async fn run_with_watch(flags: Flags, script: String) -> Result<i32, AnyError> {
-  /// The FileWatcherModuleExecutor provides module execution with safe dispatching of life-cycle events by tracking the
-  /// state of any pending events and emitting accordingly on drop in the case of a future
-  /// cancellation.
-  struct FileWatcherModuleExecutor {
-    worker: MainWorker,
-    pending_unload: bool,
-    compat: bool,
-  }
-
-  impl FileWatcherModuleExecutor {
-    pub fn new(worker: MainWorker, compat: bool) -> FileWatcherModuleExecutor {
-      FileWatcherModuleExecutor {
-        worker,
-        pending_unload: false,
-        compat,
-      }
-    }
-
-    /// Execute the given main module emitting load and unload events before and after execution
-    /// respectively.
-    pub async fn execute(
-      &mut self,
-      main_module: &ModuleSpecifier,
-    ) -> Result<(), AnyError> {
-      if self.compat {
-        self.worker.execute_side_module(&compat::GLOBAL_URL).await?;
-      }
-      self.worker.execute_main_module(main_module).await?;
-      self.worker.dispatch_load_event(&located_script_name!())?;
-      self.pending_unload = true;
-
-      let result = loop {
-        let result = self.worker.run_event_loop(false).await;
-        if !self
-          .worker
-          .dispatch_beforeunload_event(&located_script_name!())?
-        {
-          break result;
-        }
-      };
-      self.pending_unload = false;
-
-      if let Err(err) = result {
-        return Err(err);
-      }
-
-      self.worker.dispatch_unload_event(&located_script_name!())?;
-
-      Ok(())
-    }
-  }
-
-  impl Drop for FileWatcherModuleExecutor {
-    fn drop(&mut self) {
-      if self.pending_unload {
-        self
-          .worker
-          .dispatch_unload_event(&located_script_name!())
-          .unwrap();
-      }
-    }
-  }
-
   let flags = Arc::new(flags);
   let main_module = resolve_url_or_path(&script)?;
   let (sender, receiver) = tokio::sync::mpsc::unbounded_channel();
@@ -1001,20 +742,14 @@ async fn run_with_watch(flags: Flags, script: String) -> Result<i32, AnyError> {
       let ps =
         ProcState::build_for_file_watcher((*flags).clone(), sender.clone())
           .await?;
-      // We make use an module executor guard to ensure that unload is always fired when an
-      // operation is called.
-      let mut executor = FileWatcherModuleExecutor::new(
-        create_main_worker(
-          &ps,
-          main_module.clone(),
-          permissions,
-          vec![],
-          Default::default(),
-        ),
-        flags.compat,
+      let worker = create_main_worker(
+        &ps,
+        main_module.clone(),
+        permissions,
+        vec![],
+        Default::default(),
       );
-
-      executor.execute(&main_module).await?;
+      worker.run_for_watcher().await?;
 
       Ok(())
     })
@@ -1064,73 +799,8 @@ async fn run_command(
     Default::default(),
   );
 
-  let mut maybe_coverage_collector =
-    if let Some(ref coverage_dir) = ps.coverage_dir {
-      let session = worker.create_inspector_session().await;
-
-      let coverage_dir = PathBuf::from(coverage_dir);
-      let mut coverage_collector =
-        tools::coverage::CoverageCollector::new(coverage_dir, session);
-      worker
-        .with_event_loop(coverage_collector.start_collecting().boxed_local())
-        .await?;
-      Some(coverage_collector)
-    } else {
-      None
-    };
-
-  debug!("main_module {}", main_module);
-
-  if ps.options.compat() {
-    // TODO(bartlomieju): fix me
-    assert_eq!(main_module.scheme(), "file");
-
-    // Set up Node globals
-    worker.execute_side_module(&compat::GLOBAL_URL).await?;
-    // And `module` module that we'll use for checking which
-    // loader to use and potentially load CJS module with.
-    // This allows to skip permission check for `--allow-net`
-    // which would otherwise be requested by dynamically importing
-    // this file.
-    worker.execute_side_module(&compat::MODULE_URL).await?;
-
-    let use_esm_loader = compat::check_if_should_use_esm_loader(&main_module)?;
-
-    if use_esm_loader {
-      // ES module execution in Node compatiblity mode
-      worker.execute_main_module(&main_module).await?;
-    } else {
-      // CJS module execution in Node compatiblity mode
-      compat::load_cjs_module(
-        &mut worker.js_runtime,
-        &main_module.to_file_path().unwrap().display().to_string(),
-        true,
-      )?;
-    }
-  } else {
-    // Regular ES module execution
-    worker.execute_main_module(&main_module).await?;
-  }
-
-  worker.dispatch_load_event(&located_script_name!())?;
-
-  loop {
-    worker
-      .run_event_loop(maybe_coverage_collector.is_none())
-      .await?;
-    if !worker.dispatch_beforeunload_event(&located_script_name!())? {
-      break;
-    }
-  }
-
-  worker.dispatch_unload_event(&located_script_name!())?;
-
-  if let Some(coverage_collector) = maybe_coverage_collector.as_mut() {
-    worker
-      .with_event_loop(coverage_collector.stop_collecting().boxed_local())
-      .await?;
-  }
-  Ok(worker.get_exit_code())
+  let exit_code = worker.run().await?;
+  Ok(exit_code)
 }
 
 async fn task_command(
diff --git a/cli/tools/bench.rs b/cli/tools/bench.rs
index 60bdd6280..3d52e4226 100644
--- a/cli/tools/bench.rs
+++ b/cli/tools/bench.rs
@@ -4,7 +4,6 @@ use crate::args::BenchFlags;
 use crate::args::Flags;
 use crate::args::TypeCheckMode;
 use crate::colors;
-use crate::compat;
 use crate::create_main_worker;
 use crate::file_watcher;
 use crate::file_watcher::ResolutionResult;
@@ -12,7 +11,6 @@ use crate::fs_util::collect_specifiers;
 use crate::fs_util::is_supported_bench_path;
 use crate::graph_util::contains_specifier;
 use crate::graph_util::graph_valid;
-use crate::located_script_name;
 use crate::ops;
 use crate::proc_state::ProcState;
 use crate::tools::test::format_test_error;
@@ -40,7 +38,6 @@ use tokio::sync::mpsc::UnboundedSender;
 
 #[derive(Debug, Clone, Deserialize)]
 struct BenchSpecifierOptions {
-  compat_mode: bool,
   filter: Option<String>,
 }
 
@@ -367,50 +364,7 @@ async fn bench_specifier(
     Default::default(),
   );
 
-  worker.js_runtime.execute_script(
-    &located_script_name!(),
-    r#"Deno[Deno.internal].enableTestAndBench()"#,
-  )?;
-
-  if options.compat_mode {
-    worker.execute_side_module(&compat::GLOBAL_URL).await?;
-    worker.execute_side_module(&compat::MODULE_URL).await?;
-
-    let use_esm_loader = compat::check_if_should_use_esm_loader(&specifier)?;
-
-    if use_esm_loader {
-      worker.execute_side_module(&specifier).await?;
-    } else {
-      compat::load_cjs_module(
-        &mut worker.js_runtime,
-        &specifier.to_file_path().unwrap().display().to_string(),
-        false,
-      )?;
-      worker.run_event_loop(false).await?;
-    }
-  } else {
-    // We execute the module module as a side module so that import.meta.main is not set.
-    worker.execute_side_module(&specifier).await?;
-  }
-
-  worker.dispatch_load_event(&located_script_name!())?;
-
-  let bench_result = worker.js_runtime.execute_script(
-    &located_script_name!(),
-    r#"Deno[Deno.internal].runBenchmarks()"#,
-  )?;
-
-  worker.js_runtime.resolve_value(bench_result).await?;
-
-  loop {
-    if !worker.dispatch_beforeunload_event(&located_script_name!())? {
-      break;
-    }
-    worker.run_event_loop(false).await?;
-  }
-  worker.dispatch_unload_event(&located_script_name!())?;
-
-  Ok(())
+  worker.run_bench_specifier().await
 }
 
 /// Test a collection of specifiers with test modes concurrently.
@@ -537,13 +491,11 @@ pub async fn run_benchmarks(
 
   check_specifiers(&ps, permissions.clone(), specifiers.clone()).await?;
 
-  let compat = ps.options.compat();
   bench_specifiers(
     ps,
     permissions,
     specifiers,
     BenchSpecifierOptions {
-      compat_mode: compat,
       filter: bench_flags.filter,
     },
   )
@@ -703,7 +655,6 @@ pub async fn run_benchmarks_with_watch(
       check_specifiers(&ps, permissions.clone(), specifiers.clone()).await?;
 
       let specifier_options = BenchSpecifierOptions {
-        compat_mode: ps.options.compat(),
         filter: filter.clone(),
       };
       bench_specifiers(ps, permissions.clone(), specifiers, specifier_options)
diff --git a/cli/tools/test.rs b/cli/tools/test.rs
index 7df7e560d..6d24a7e4c 100644
--- a/cli/tools/test.rs
+++ b/cli/tools/test.rs
@@ -5,7 +5,6 @@ use crate::args::TestFlags;
 use crate::args::TypeCheckMode;
 use crate::checksum;
 use crate::colors;
-use crate::compat;
 use crate::create_main_worker;
 use crate::display;
 use crate::file_fetcher::File;
@@ -18,10 +17,8 @@ use crate::fs_util::is_supported_test_path;
 use crate::fs_util::specifier_to_file_path;
 use crate::graph_util::contains_specifier;
 use crate::graph_util::graph_valid;
-use crate::located_script_name;
 use crate::ops;
 use crate::proc_state::ProcState;
-use crate::tools::coverage::CoverageCollector;
 
 use deno_ast::swc::common::comments::CommentKind;
 use deno_ast::MediaType;
@@ -34,7 +31,6 @@ use deno_core::futures::stream;
 use deno_core::futures::FutureExt;
 use deno_core::futures::StreamExt;
 use deno_core::parking_lot::Mutex;
-use deno_core::serde_json::json;
 use deno_core::url::Url;
 use deno_core::ModuleSpecifier;
 use deno_graph::ModuleKind;
@@ -247,12 +243,9 @@ pub struct TestSummary {
 
 #[derive(Debug, Clone)]
 struct TestSpecifierOptions {
-  compat_mode: bool,
   concurrent_jobs: NonZeroUsize,
   fail_fast: Option<NonZeroUsize>,
   filter: TestFilter,
-  shuffle: Option<u64>,
-  trace_ops: bool,
 }
 
 impl TestSummary {
@@ -732,90 +725,7 @@ async fn test_specifier(
     },
   );
 
-  worker.js_runtime.execute_script(
-    &located_script_name!(),
-    r#"Deno[Deno.internal].enableTestAndBench()"#,
-  )?;
-
-  let mut maybe_coverage_collector = if let Some(ref coverage_dir) =
-    ps.coverage_dir
-  {
-    let session = worker.create_inspector_session().await;
-    let coverage_dir = PathBuf::from(coverage_dir);
-    let mut coverage_collector = CoverageCollector::new(coverage_dir, session);
-    worker
-      .with_event_loop(coverage_collector.start_collecting().boxed_local())
-      .await?;
-
-    Some(coverage_collector)
-  } else {
-    None
-  };
-
-  // Enable op call tracing in core to enable better debugging of op sanitizer
-  // failures.
-  if options.trace_ops {
-    worker
-      .execute_script(
-        &located_script_name!(),
-        "Deno.core.enableOpCallTracing();",
-      )
-      .unwrap();
-  }
-
-  // We only execute the specifier as a module if it is tagged with TestMode::Module or
-  // TestMode::Both.
-  if mode != TestMode::Documentation {
-    if options.compat_mode {
-      worker.execute_side_module(&compat::GLOBAL_URL).await?;
-      worker.execute_side_module(&compat::MODULE_URL).await?;
-
-      let use_esm_loader = compat::check_if_should_use_esm_loader(&specifier)?;
-
-      if use_esm_loader {
-        worker.execute_side_module(&specifier).await?;
-      } else {
-        compat::load_cjs_module(
-          &mut worker.js_runtime,
-          &specifier.to_file_path().unwrap().display().to_string(),
-          false,
-        )?;
-        worker.run_event_loop(false).await?;
-      }
-    } else {
-      // We execute the module module as a side module so that import.meta.main is not set.
-      worker.execute_side_module(&specifier).await?;
-    }
-  }
-
-  worker.dispatch_load_event(&located_script_name!())?;
-
-  let test_result = worker.js_runtime.execute_script(
-    &located_script_name!(),
-    &format!(
-      r#"Deno[Deno.internal].runTests({})"#,
-      json!({ "shuffle": options.shuffle }),
-    ),
-  )?;
-
-  worker.js_runtime.resolve_value(test_result).await?;
-
-  loop {
-    if !worker.dispatch_beforeunload_event(&located_script_name!())? {
-      break;
-    }
-    worker.run_event_loop(false).await?;
-  }
-
-  worker.dispatch_unload_event(&located_script_name!())?;
-
-  if let Some(coverage_collector) = maybe_coverage_collector.as_mut() {
-    worker
-      .with_event_loop(coverage_collector.stop_collecting().boxed_local())
-      .await?;
-  }
-
-  Ok(())
+  worker.run_test_specifier(mode).await
 }
 
 fn extract_files_from_regex_blocks(
@@ -1076,7 +986,7 @@ async fn test_specifiers(
   options: TestSpecifierOptions,
 ) -> Result<(), AnyError> {
   let log_level = ps.options.log_level();
-  let specifiers_with_mode = if let Some(seed) = options.shuffle {
+  let specifiers_with_mode = if let Some(seed) = ps.options.shuffle_tests() {
     let mut rng = SmallRng::seed_from_u64(seed);
     let mut specifiers_with_mode = specifiers_with_mode.clone();
     specifiers_with_mode.sort_by_key(|(specifier, _)| specifier.clone());
@@ -1405,18 +1315,14 @@ pub async fn run_tests(
     return Ok(());
   }
 
-  let compat = ps.options.compat();
   test_specifiers(
     ps,
     permissions,
     specifiers_with_mode,
     TestSpecifierOptions {
-      compat_mode: compat,
       concurrent_jobs: test_flags.concurrent_jobs,
       fail_fast: test_flags.fail_fast,
       filter: TestFilter::from_flag(&test_flags.filter),
-      shuffle: test_flags.shuffle,
-      trace_ops: test_flags.trace_ops,
     },
   )
   .await?;
@@ -1561,7 +1467,6 @@ pub async fn run_tests_with_watch(
 
   let cli_options = ps.options.clone();
   let operation = |modules_to_reload: Vec<(ModuleSpecifier, ModuleKind)>| {
-    let cli_options = cli_options.clone();
     let filter = test_flags.filter.clone();
     let include = include.clone();
     let ignore = ignore.clone();
@@ -1595,12 +1500,9 @@ pub async fn run_tests_with_watch(
         permissions.clone(),
         specifiers_with_mode,
         TestSpecifierOptions {
-          compat_mode: cli_options.compat(),
           concurrent_jobs: test_flags.concurrent_jobs,
           fail_fast: test_flags.fail_fast,
           filter: TestFilter::from_flag(&filter),
-          shuffle: test_flags.shuffle,
-          trace_ops: test_flags.trace_ops,
         },
       )
       .await?;
diff --git a/cli/worker.rs b/cli/worker.rs
new file mode 100644
index 000000000..8ab9b4c67
--- /dev/null
+++ b/cli/worker.rs
@@ -0,0 +1,578 @@
+use std::path::PathBuf;
+use std::sync::Arc;
+
+use deno_ast::ModuleSpecifier;
+use deno_core::error::AnyError;
+use deno_core::futures::task::LocalFutureObj;
+use deno_core::futures::FutureExt;
+use deno_core::located_script_name;
+use deno_core::serde_json::json;
+use deno_core::Extension;
+use deno_core::ModuleId;
+use deno_runtime::colors;
+use deno_runtime::ops::worker_host::CreateWebWorkerCb;
+use deno_runtime::ops::worker_host::PreloadModuleCb;
+use deno_runtime::permissions::Permissions;
+use deno_runtime::web_worker::WebWorker;
+use deno_runtime::web_worker::WebWorkerOptions;
+use deno_runtime::worker::MainWorker;
+use deno_runtime::worker::WorkerOptions;
+use deno_runtime::BootstrapOptions;
+
+use crate::checksum;
+use crate::compat;
+use crate::errors;
+use crate::fmt_errors::format_js_error;
+use crate::module_loader::CliModuleLoader;
+use crate::ops;
+use crate::proc_state::ProcState;
+use crate::tools;
+use crate::tools::coverage::CoverageCollector;
+use crate::tools::test::TestMode;
+use crate::version;
+
+pub struct CliMainWorker {
+  main_module: ModuleSpecifier,
+  worker: MainWorker,
+  ps: ProcState,
+}
+
+impl CliMainWorker {
+  pub fn into_main_worker(self) -> MainWorker {
+    self.worker
+  }
+
+  pub async fn preload_main_module(&mut self) -> Result<ModuleId, AnyError> {
+    self.worker.preload_main_module(&self.main_module).await
+  }
+
+  pub async fn setup_repl(&mut self) -> Result<(), AnyError> {
+    if self.ps.options.compat() {
+      self.worker.execute_side_module(&compat::GLOBAL_URL).await?;
+      compat::add_global_require(
+        &mut self.worker.js_runtime,
+        self.main_module.as_str(),
+      )?;
+      self.worker.run_event_loop(false).await?;
+      compat::setup_builtin_modules(&mut self.worker.js_runtime)?;
+    }
+    self.worker.run_event_loop(false).await?;
+    Ok(())
+  }
+
+  pub async fn run(&mut self) -> Result<i32, AnyError> {
+    let mut maybe_coverage_collector =
+      self.maybe_setup_coverage_collector().await?;
+    log::debug!("main_module {}", self.main_module);
+
+    if self.ps.options.compat() {
+      // TODO(bartlomieju): fix me
+      assert_eq!(self.main_module.scheme(), "file");
+
+      // Set up Node globals
+      self.worker.execute_side_module(&compat::GLOBAL_URL).await?;
+      // And `module` module that we'll use for checking which
+      // loader to use and potentially load CJS module with.
+      // This allows to skip permission check for `--allow-net`
+      // which would otherwise be requested by dynamically importing
+      // this file.
+      self.worker.execute_side_module(&compat::MODULE_URL).await?;
+
+      let use_esm_loader =
+        compat::check_if_should_use_esm_loader(&self.main_module)?;
+
+      if use_esm_loader {
+        // ES module execution in Node compatiblity mode
+        self.worker.execute_main_module(&self.main_module).await?;
+      } else {
+        // CJS module execution in Node compatiblity mode
+        compat::load_cjs_module(
+          &mut self.worker.js_runtime,
+          &self
+            .main_module
+            .to_file_path()
+            .unwrap()
+            .display()
+            .to_string(),
+          true,
+        )?;
+      }
+    } else {
+      // Regular ES module execution
+      self.worker.execute_main_module(&self.main_module).await?;
+    }
+
+    self.worker.dispatch_load_event(&located_script_name!())?;
+
+    loop {
+      self
+        .worker
+        .run_event_loop(maybe_coverage_collector.is_none())
+        .await?;
+      if !self
+        .worker
+        .dispatch_beforeunload_event(&located_script_name!())?
+      {
+        break;
+      }
+    }
+
+    self.worker.dispatch_unload_event(&located_script_name!())?;
+
+    if let Some(coverage_collector) = maybe_coverage_collector.as_mut() {
+      self
+        .worker
+        .with_event_loop(coverage_collector.stop_collecting().boxed_local())
+        .await?;
+    }
+
+    Ok(self.worker.get_exit_code())
+  }
+
+  pub async fn run_for_watcher(self) -> Result<(), AnyError> {
+    /// The FileWatcherModuleExecutor provides module execution with safe dispatching of life-cycle events by tracking the
+    /// state of any pending events and emitting accordingly on drop in the case of a future
+    /// cancellation.
+    struct FileWatcherModuleExecutor {
+      worker: MainWorker,
+      pending_unload: bool,
+      ps: ProcState,
+    }
+
+    impl FileWatcherModuleExecutor {
+      pub fn new(
+        worker: MainWorker,
+        ps: ProcState,
+      ) -> FileWatcherModuleExecutor {
+        FileWatcherModuleExecutor {
+          worker,
+          pending_unload: false,
+          ps,
+        }
+      }
+
+      /// Execute the given main module emitting load and unload events before and after execution
+      /// respectively.
+      pub async fn execute(
+        &mut self,
+        main_module: &ModuleSpecifier,
+      ) -> Result<(), AnyError> {
+        if self.ps.options.compat() {
+          self.worker.execute_side_module(&compat::GLOBAL_URL).await?;
+        }
+        self.worker.execute_main_module(main_module).await?;
+        self.worker.dispatch_load_event(&located_script_name!())?;
+        self.pending_unload = true;
+
+        let result = loop {
+          let result = self.worker.run_event_loop(false).await;
+          if !self
+            .worker
+            .dispatch_beforeunload_event(&located_script_name!())?
+          {
+            break result;
+          }
+        };
+        self.pending_unload = false;
+
+        if let Err(err) = result {
+          return Err(err);
+        }
+
+        self.worker.dispatch_unload_event(&located_script_name!())?;
+
+        Ok(())
+      }
+    }
+
+    impl Drop for FileWatcherModuleExecutor {
+      fn drop(&mut self) {
+        if self.pending_unload {
+          self
+            .worker
+            .dispatch_unload_event(&located_script_name!())
+            .unwrap();
+        }
+      }
+    }
+
+    let mut executor = FileWatcherModuleExecutor::new(self.worker, self.ps);
+    executor.execute(&self.main_module).await
+  }
+
+  pub async fn run_test_specifier(
+    &mut self,
+    mode: TestMode,
+  ) -> Result<(), AnyError> {
+    self.worker.js_runtime.execute_script(
+      &located_script_name!(),
+      r#"Deno[Deno.internal].enableTestAndBench()"#,
+    )?;
+
+    // Enable op call tracing in core to enable better debugging of op sanitizer
+    // failures.
+    if self.ps.options.trace_ops() {
+      self
+        .worker
+        .js_runtime
+        .execute_script(
+          &located_script_name!(),
+          "Deno.core.enableOpCallTracing();",
+        )
+        .unwrap();
+    }
+
+    let mut maybe_coverage_collector =
+      self.maybe_setup_coverage_collector().await?;
+
+    // We only execute the specifier as a module if it is tagged with TestMode::Module or
+    // TestMode::Both.
+    if mode != TestMode::Documentation {
+      if self.ps.options.compat() {
+        self.worker.execute_side_module(&compat::GLOBAL_URL).await?;
+        self.worker.execute_side_module(&compat::MODULE_URL).await?;
+
+        let use_esm_loader =
+          compat::check_if_should_use_esm_loader(&self.main_module)?;
+
+        if use_esm_loader {
+          self.worker.execute_side_module(&self.main_module).await?;
+        } else {
+          compat::load_cjs_module(
+            &mut self.worker.js_runtime,
+            &self
+              .main_module
+              .to_file_path()
+              .unwrap()
+              .display()
+              .to_string(),
+            false,
+          )?;
+          self.worker.run_event_loop(false).await?;
+        }
+      } else {
+        // We execute the module module as a side module so that import.meta.main is not set.
+        self.worker.execute_side_module(&self.main_module).await?;
+      }
+    }
+
+    self.worker.dispatch_load_event(&located_script_name!())?;
+
+    let test_result = self.worker.js_runtime.execute_script(
+      &located_script_name!(),
+      &format!(
+        r#"Deno[Deno.internal].runTests({})"#,
+        json!({ "shuffle": self.ps.options.shuffle_tests() }),
+      ),
+    )?;
+
+    self.worker.js_runtime.resolve_value(test_result).await?;
+
+    loop {
+      if !self
+        .worker
+        .dispatch_beforeunload_event(&located_script_name!())?
+      {
+        break;
+      }
+      self.worker.run_event_loop(false).await?;
+    }
+
+    self.worker.dispatch_unload_event(&located_script_name!())?;
+
+    if let Some(coverage_collector) = maybe_coverage_collector.as_mut() {
+      self
+        .worker
+        .with_event_loop(coverage_collector.stop_collecting().boxed_local())
+        .await?;
+    }
+    Ok(())
+  }
+
+  pub async fn run_lsp_test_specifier(
+    &mut self,
+    mode: TestMode,
+  ) -> Result<(), AnyError> {
+    self.worker.js_runtime.execute_script(
+      &located_script_name!(),
+      r#"Deno[Deno.internal].enableTestAndBench()"#,
+    )?;
+
+    self
+      .worker
+      .execute_script(
+        &located_script_name!(),
+        "Deno.core.enableOpCallTracing();",
+      )
+      .unwrap();
+
+    if mode != TestMode::Documentation {
+      self.worker.execute_side_module(&self.main_module).await?;
+    }
+
+    self.worker.dispatch_load_event(&located_script_name!())?;
+
+    let test_result = self.worker.js_runtime.execute_script(
+      &located_script_name!(),
+      r#"Deno[Deno.internal].runTests()"#,
+    )?;
+
+    self.worker.js_runtime.resolve_value(test_result).await?;
+
+    loop {
+      if !self
+        .worker
+        .dispatch_beforeunload_event(&located_script_name!())?
+      {
+        break;
+      }
+      self.worker.run_event_loop(false).await?;
+    }
+    self.worker.dispatch_unload_event(&located_script_name!())?;
+    Ok(())
+  }
+
+  pub async fn run_bench_specifier(&mut self) -> Result<(), AnyError> {
+    self.worker.js_runtime.execute_script(
+      &located_script_name!(),
+      r#"Deno[Deno.internal].enableTestAndBench()"#,
+    )?;
+
+    if self.ps.options.compat() {
+      self.worker.execute_side_module(&compat::GLOBAL_URL).await?;
+      self.worker.execute_side_module(&compat::MODULE_URL).await?;
+
+      let use_esm_loader =
+        compat::check_if_should_use_esm_loader(&self.main_module)?;
+
+      if use_esm_loader {
+        self.worker.execute_side_module(&self.main_module).await?;
+      } else {
+        compat::load_cjs_module(
+          &mut self.worker.js_runtime,
+          &self
+            .main_module
+            .to_file_path()
+            .unwrap()
+            .display()
+            .to_string(),
+          false,
+        )?;
+        self.worker.run_event_loop(false).await?;
+      }
+    } else {
+      // We execute the module module as a side module so that import.meta.main is not set.
+      self.worker.execute_side_module(&self.main_module).await?;
+    }
+
+    self.worker.dispatch_load_event(&located_script_name!())?;
+
+    let bench_result = self.worker.js_runtime.execute_script(
+      &located_script_name!(),
+      r#"Deno[Deno.internal].runBenchmarks()"#,
+    )?;
+
+    self.worker.js_runtime.resolve_value(bench_result).await?;
+
+    loop {
+      if !self
+        .worker
+        .dispatch_beforeunload_event(&located_script_name!())?
+      {
+        break;
+      }
+      self.worker.run_event_loop(false).await?;
+    }
+    self.worker.dispatch_unload_event(&located_script_name!())?;
+    Ok(())
+  }
+
+  async fn maybe_setup_coverage_collector(
+    &mut self,
+  ) -> Result<Option<CoverageCollector>, AnyError> {
+    if let Some(ref coverage_dir) = self.ps.coverage_dir {
+      let session = self.worker.create_inspector_session().await;
+
+      let coverage_dir = PathBuf::from(coverage_dir);
+      let mut coverage_collector =
+        tools::coverage::CoverageCollector::new(coverage_dir, session);
+      self
+        .worker
+        .with_event_loop(coverage_collector.start_collecting().boxed_local())
+        .await?;
+      Ok(Some(coverage_collector))
+    } else {
+      Ok(None)
+    }
+  }
+}
+
+pub fn create_main_worker(
+  ps: &ProcState,
+  main_module: ModuleSpecifier,
+  permissions: Permissions,
+  mut custom_extensions: Vec<Extension>,
+  stdio: deno_runtime::ops::io::Stdio,
+) -> CliMainWorker {
+  let module_loader = CliModuleLoader::new(ps.clone());
+
+  let maybe_inspector_server = ps.maybe_inspector_server.clone();
+  let should_break_on_first_statement = ps.options.inspect_brk().is_some();
+
+  let create_web_worker_cb =
+    create_web_worker_callback(ps.clone(), stdio.clone());
+  let web_worker_preload_module_cb =
+    create_web_worker_preload_module_callback(ps.clone());
+
+  let maybe_storage_key = ps.options.resolve_storage_key(&main_module);
+  let origin_storage_dir = maybe_storage_key.map(|key| {
+    ps.dir
+      .root
+      // TODO(@crowlKats): change to origin_data for 2.0
+      .join("location_data")
+      .join(checksum::gen(&[key.as_bytes()]))
+  });
+
+  let mut extensions = ops::cli_exts(ps.clone());
+  extensions.append(&mut custom_extensions);
+
+  let options = WorkerOptions {
+    bootstrap: BootstrapOptions {
+      args: ps.options.argv().clone(),
+      cpu_count: std::thread::available_parallelism()
+        .map(|p| p.get())
+        .unwrap_or(1),
+      debug_flag: ps
+        .options
+        .log_level()
+        .map_or(false, |l| l == log::Level::Debug),
+      enable_testing_features: ps.options.enable_testing_features(),
+      location: ps.options.location_flag().map(ToOwned::to_owned),
+      no_color: !colors::use_color(),
+      is_tty: colors::is_tty(),
+      runtime_version: version::deno(),
+      ts_version: version::TYPESCRIPT.to_string(),
+      unstable: ps.options.unstable(),
+      user_agent: version::get_user_agent(),
+    },
+    extensions,
+    unsafely_ignore_certificate_errors: ps
+      .options
+      .unsafely_ignore_certificate_errors()
+      .map(ToOwned::to_owned),
+    root_cert_store: Some(ps.root_cert_store.clone()),
+    seed: ps.options.seed(),
+    source_map_getter: Some(Box::new(module_loader.clone())),
+    format_js_error_fn: Some(Arc::new(format_js_error)),
+    create_web_worker_cb,
+    web_worker_preload_module_cb,
+    maybe_inspector_server,
+    should_break_on_first_statement,
+    module_loader,
+    get_error_class_fn: Some(&errors::get_error_class_name),
+    origin_storage_dir,
+    blob_store: ps.blob_store.clone(),
+    broadcast_channel: ps.broadcast_channel.clone(),
+    shared_array_buffer_store: Some(ps.shared_array_buffer_store.clone()),
+    compiled_wasm_module_store: Some(ps.compiled_wasm_module_store.clone()),
+    stdio,
+  };
+
+  let worker = MainWorker::bootstrap_from_options(
+    main_module.clone(),
+    permissions,
+    options,
+  );
+  CliMainWorker {
+    main_module,
+    worker,
+    ps: ps.clone(),
+  }
+}
+
+fn create_web_worker_preload_module_callback(
+  ps: ProcState,
+) -> Arc<PreloadModuleCb> {
+  let compat = ps.options.compat();
+
+  Arc::new(move |mut worker| {
+    let fut = async move {
+      if compat {
+        worker.execute_side_module(&compat::GLOBAL_URL).await?;
+        worker.execute_side_module(&compat::MODULE_URL).await?;
+      }
+
+      Ok(worker)
+    };
+    LocalFutureObj::new(Box::new(fut))
+  })
+}
+
+fn create_web_worker_callback(
+  ps: ProcState,
+  stdio: deno_runtime::ops::io::Stdio,
+) -> Arc<CreateWebWorkerCb> {
+  Arc::new(move |args| {
+    let maybe_inspector_server = ps.maybe_inspector_server.clone();
+
+    let module_loader = CliModuleLoader::new_for_worker(
+      ps.clone(),
+      args.parent_permissions.clone(),
+    );
+    let create_web_worker_cb =
+      create_web_worker_callback(ps.clone(), stdio.clone());
+    let preload_module_cb =
+      create_web_worker_preload_module_callback(ps.clone());
+
+    let extensions = ops::cli_exts(ps.clone());
+
+    let options = WebWorkerOptions {
+      bootstrap: BootstrapOptions {
+        args: ps.options.argv().clone(),
+        cpu_count: std::thread::available_parallelism()
+          .map(|p| p.get())
+          .unwrap_or(1),
+        debug_flag: ps
+          .options
+          .log_level()
+          .map_or(false, |l| l == log::Level::Debug),
+        enable_testing_features: ps.options.enable_testing_features(),
+        location: Some(args.main_module.clone()),
+        no_color: !colors::use_color(),
+        is_tty: colors::is_tty(),
+        runtime_version: version::deno(),
+        ts_version: version::TYPESCRIPT.to_string(),
+        unstable: ps.options.unstable(),
+        user_agent: version::get_user_agent(),
+      },
+      extensions,
+      unsafely_ignore_certificate_errors: ps
+        .options
+        .unsafely_ignore_certificate_errors()
+        .map(ToOwned::to_owned),
+      root_cert_store: Some(ps.root_cert_store.clone()),
+      seed: ps.options.seed(),
+      create_web_worker_cb,
+      preload_module_cb,
+      format_js_error_fn: Some(Arc::new(format_js_error)),
+      source_map_getter: Some(Box::new(module_loader.clone())),
+      module_loader,
+      worker_type: args.worker_type,
+      maybe_inspector_server,
+      get_error_class_fn: Some(&errors::get_error_class_name),
+      blob_store: ps.blob_store.clone(),
+      broadcast_channel: ps.broadcast_channel.clone(),
+      shared_array_buffer_store: Some(ps.shared_array_buffer_store.clone()),
+      compiled_wasm_module_store: Some(ps.compiled_wasm_module_store.clone()),
+      stdio: stdio.clone(),
+    };
+
+    WebWorker::bootstrap_from_options(
+      args.name,
+      args.permissions,
+      args.main_module,
+      args.worker_id,
+      options,
+    )
+  })
+}