1 files changed, 42 insertions, 0 deletions
diff --git a/runtime/worker_bootstrap.rs b/runtime/worker_bootstrap.rs
index c019dae1a..ee3b81c62 100644
--- a/runtime/worker_bootstrap.rs
+++ b/runtime/worker_bootstrap.rs
@@ -4,10 +4,36 @@ use deno_core::v8;
 use deno_core::ModuleSpecifier;
 use serde::Serialize;
 use std::cell::RefCell;
+use std::num::NonZeroU16;
 use std::thread;
 
 use deno_terminal::colors;
 
+/// The execution mode for this worker. Some modes may have implicit behaviour.
+#[derive(Copy, Clone)]
+#[repr(u8)]
+pub enum WorkerExecutionMode {
+  /// No special behaviour.
+  None,
+
+  /// Running in a worker.
+  Worker,
+  /// `deno run`
+  Run,
+  /// `deno repl`
+  Repl,
+  /// `deno eval`
+  Eval,
+  /// `deno test`
+  Test,
+  /// `deno bench`
+  Bench,
+  /// `deno serve`
+  Serve,
+  /// `deno jupyter`
+  Jupyter,
+}
+
 /// The log level to use when printing diagnostic log messages, warnings,
 /// or errors in the worker.
 ///
@@ -63,6 +89,10 @@ pub struct BootstrapOptions {
   pub disable_deprecated_api_warning: bool,
   pub verbose_deprecated_api_warning: bool,
   pub future: bool,
+  pub mode: WorkerExecutionMode,
+  // Used by `deno serve`
+  pub serve_port: Option<NonZeroU16>,
+  pub serve_host: Option<String>,
 }
 
 impl Default for BootstrapOptions {
@@ -94,6 +124,9 @@ impl Default for BootstrapOptions {
       disable_deprecated_api_warning: false,
       verbose_deprecated_api_warning: false,
       future: false,
+      mode: WorkerExecutionMode::None,
+      serve_port: Default::default(),
+      serve_host: Default::default(),
     }
   }
 }
@@ -129,6 +162,12 @@ struct BootstrapV8<'a>(
   bool,
   // future
   bool,
+  // mode
+  i32,
+  // serve port
+  u16,
+  // serve host
+  Option<&'a str>,
 );
 
 impl BootstrapOptions {
@@ -151,6 +190,9 @@ impl BootstrapOptions {
       self.disable_deprecated_api_warning,
       self.verbose_deprecated_api_warning,
       self.future,
+      self.mode as u8 as _,
+      self.serve_port.map(|x| x.into()).unwrap_or_default(),
+      self.serve_host.as_deref(),
     );
 
     bootstrap.serialize(ser).unwrap()