[feat] fs.watch (#3249)

* initial support

* add types

* fix comment

* fix types

* bigfix up

* more fixes

* fix some encoding support for watch

* fix rename event

* fixup

* fix latin1

* add fs_events, still failing some tests

* fixuup

* remove unecesary check

* readd tests ops

* this is necessary? just testing CI/CD weird errors

* just use dupe here

* cleanup and fix deinit

* fix zig upgrade

1 files changed, 56 insertions, 0 deletions

diff --git a/src/bun.js/bindings/ZigGeneratedClasses.h b/src/bun.js/bindings/ZigGeneratedClasses.h
index 668cd3f6b..3fa0e26d2 100644
--- a/src/bun.js/bindings/ZigGeneratedClasses.h
+++ b/src/bun.js/bindings/ZigGeneratedClasses.h
@@ -578,6 +578,62 @@ public:
     mutable JSC::WriteBarrier<JSC::Unknown> m_testValue;
 };
 
+class JSFSWatcher final : public JSC::JSDestructibleObject {
+public:
+    using Base = JSC::JSDestructibleObject;
+    static JSFSWatcher* create(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure, void* ctx);
+
+    DECLARE_EXPORT_INFO;
+    template<typename, JSC::SubspaceAccess mode> static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
+    {
+        if constexpr (mode == JSC::SubspaceAccess::Concurrently)
+            return nullptr;
+        return WebCore::subspaceForImpl<JSFSWatcher, WebCore::UseCustomHeapCellType::No>(
+            vm,
+            [](auto& spaces) { return spaces.m_clientSubspaceForFSWatcher.get(); },
+            [](auto& spaces, auto&& space) { spaces.m_clientSubspaceForFSWatcher = std::forward<decltype(space)>(space); },
+            [](auto& spaces) { return spaces.m_subspaceForFSWatcher.get(); },
+            [](auto& spaces, auto&& space) { spaces.m_subspaceForFSWatcher = std::forward<decltype(space)>(space); });
+    }
+
+    static void destroy(JSC::JSCell*);
+    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
+    {
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(static_cast<JSC::JSType>(0b11101110), StructureFlags), info());
+    }
+
+    static JSObject* createPrototype(VM& vm, JSDOMGlobalObject* globalObject);
+    ;
+
+    ~JSFSWatcher();
+
+    void* wrapped() const { return m_ctx; }
+
+    void detach()
+    {
+        m_ctx = nullptr;
+    }
+
+    static void analyzeHeap(JSCell*, JSC::HeapAnalyzer&);
+    static ptrdiff_t offsetOfWrapped() { return OBJECT_OFFSETOF(JSFSWatcher, m_ctx); }
+
+    void* m_ctx { nullptr };
+
+    JSFSWatcher(JSC::VM& vm, JSC::Structure* structure, void* sinkPtr)
+        : Base(vm, structure)
+    {
+        m_ctx = sinkPtr;
+    }
+
+    void finishCreation(JSC::VM&);
+
+    DECLARE_VISIT_CHILDREN;
+    template<typename Visitor> void visitAdditionalChildren(Visitor&);
+    DECLARE_VISIT_OUTPUT_CONSTRAINTS;
+
+    mutable JSC::WriteBarrier<JSC::Unknown> m_listener;
+};
+
 class JSFileSystemRouter final : public JSC::JSDestructibleObject {
 public:
     using Base = JSC::JSDestructibleObject;