Add Bun.canReload event to inspector

2 files changed, 17 insertions, 0 deletions

diff --git a/src/bun.js/bindings/BunDebugger.cpp b/src/bun.js/bindings/BunDebugger.cpp
index f4a5f535a..046739923 100644
--- a/src/bun.js/bindings/BunDebugger.cpp
+++ b/src/bun.js/bindings/BunDebugger.cpp
@@ -452,6 +452,21 @@ extern "C" void Bun__ensureDebugger(ScriptExecutionContextIdentifier scriptId, b
     }
 }
 
+extern "C" void BunDebugger__willHotReload() {
+    if (debuggerScriptExecutionContext == nullptr) {
+        return;
+    }
+
+    debuggerScriptExecutionContext->postTaskConcurrently([](ScriptExecutionContext &context){
+        WTF::LockHolder locker(inspectorConnectionsLock);
+        for (auto& connections : *inspectorConnections) {
+            for (auto* connection : connections.value) {
+                connection->sendMessageToFrontend("{\"method\":\"Bun.canReload\"}"_s);
+            }
+        }
+    });
+}
+
 JSC_DEFINE_HOST_FUNCTION(jsFunctionCreateConnection, (JSGlobalObject * globalObject, CallFrame* callFrame))
 {
     auto* debuggerGlobalObject = jsDynamicCast<Zig::GlobalObject*>(globalObject);
diff --git a/src/bun.js/javascript.zig b/src/bun.js/javascript.zig
index 32cf04346..212e6be71 100644
--- a/src/bun.js/javascript.zig
+++ b/src/bun.js/javascript.zig
@@ -2720,6 +2720,7 @@ pub const VirtualMachine = struct {
 
 pub const HotReloader = NewHotReloader(VirtualMachine, JSC.EventLoop, false);
 pub const Watcher = HotReloader.Watcher;
+extern fn BunDebugger__willHotReload() void;
 
 pub fn NewHotReloader(comptime Ctx: type, comptime EventLoopType: type, comptime reload_immediately: bool) type {
     return struct {
@@ -2777,6 +2778,7 @@ pub fn NewHotReloader(comptime Ctx: type, comptime EventLoopType: type, comptime
                     unreachable;
                 }
 
+                BunDebugger__willHotReload();
                 var that = bun.default_allocator.create(HotReloadTask) catch unreachable;
 
                 that.* = this.*;