Node-API migration

package.json

@@ -27,20 +27,21 @@
   },
   "devDependencies": {
     "cc": "^3.0.1",
+    "chai-subset": "^1.6.0",
     "chai": "^4.3.4",
-    "chai-subset": "^1.5.0",
     "codecov": "^3.8.3",
-    "eslint": "^8.2.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-import": "^2.25.3",
     "eslint-plugin-mocha": "^9.0.0",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^4.0.0",
     "eslint-plugin-promise": "^5.1.1",
-    "lerna": "^4.0.0",
+    "eslint": "^8.2.0",
     "lerna-changelog": "^2.2.0",
+    "lerna": "^4.0.0",
     "mocha": "^9.1.3",
     "node-abi": "3.5.0",
+    "node-addon-api": "^4.2.0",
     "nyc": "^15.1.0",
     "plop": "^2.7.6",
     "prebuild": "^11.0.0",

packages/bindings/binding.gyp

@@ -4,9 +4,11 @@
     'sources': [
       'src/serialport.cpp'
     ],
-    'include_dirs': [
-      '<!(node -e "require(\'nan\')")'
-    ],
+    'include_dirs': ["<!(node -p \"require('node-addon-api').include_dir\")"],
+    'dependencies': ["<!(node -p \"require('node-addon-api').gyp\")"],
+    'cflags!': [ '-fno-exceptions' ],
+    'cflags_cc!': [ '-fno-exceptions' ],
+    "defines": ["NAPI_CPP_EXCEPTIONS"],
     'conditions': [
       ['OS=="win"',
         {
@@ -16,7 +18,7 @@
           ],
           'msvs_settings': {
             'VCCLCompilerTool': {
-              'ExceptionHandling': '2',
+              'ExceptionHandling': '1',
               'DisableSpecificWarnings': [ '4530', '4506' ],
             }
           }
@@ -30,6 +32,7 @@
             'src/darwin_list.cpp'
           ],
           'xcode_settings': {
+            'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
             'MACOSX_DEPLOYMENT_TARGET': '10.9',
             'OTHER_LDFLAGS': [
               '-framework CoreFoundation -framework IOKit'

packages/bindings/package.json

@@ -10,8 +10,8 @@
     "@serialport/parser-readline": "9.2.4",
     "bindings": "^1.5.0",
     "debug": "^4.3.2",
-    "nan": "^2.15.0",
-    "prebuild-install": "^7.0.0"
+    "prebuild-install": "^7.0.0",
+    "node-addon-api": "4.2.0"
   },
   "devDependencies": {
     "@serialport/binding-mock": "9.2.4",
@@ -21,11 +21,9 @@
     "node": ">=10.0.0"
   },
   "scripts": {
-    "install": "prebuild-install --tag-prefix @serialport/bindings@ || node-gyp rebuild",
+    "install": "prebuild-install --tag-prefix @serialport/bindings@ --runtime napi --target 4 --verbose || node-gyp rebuild",
     "lint": "cc --verbose",
-    "prebuild": "npm run prebuild-node && npm run prebuild-electron",
-    "prebuild-node": "prebuild --force --strip --verbose --tag-prefix @serialport/bindings@ -t 12.0.0 -t 14.0.0 -t 16.0.0",
-    "prebuild-electron": "prebuild --force --strip --verbose --tag-prefix @serialport/bindings@ -r electron -t 13.0.0 -t 14.0.0 -t 15.0.0 -t 16.0.0",
+    "prebuild": "prebuild --runtime napi --target 4 --force --strip --verbose --tag-prefix @serialport/bindings@",
     "rebuild": "node-gyp rebuild"
   },
   "publishConfig": {
@@ -48,5 +46,10 @@
     ],
     "linelength": "120"
   },
-  "funding": "https://opencollective.com/serialport/donate"
+  "funding": "https://opencollective.com/serialport/donate",
+  "binary": {
+    "napi_versions": [
+      4
+    ]
+  }
 }

packages/bindings/src/darwin_list.cpp

@@ -16,28 +16,28 @@
 uv_mutex_t list_mutex;
 Boolean lockInitialised = FALSE;
 
-NAN_METHOD(List) {
+Napi::Value List(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
   // callback
-  if (!info[0]->IsFunction()) {
-    Nan::ThrowTypeError("First argument must be a function");
-    return;
+  if (!info[0].IsFunction()) {
+    Napi::TypeError::New(env, "First argument must be a function").ThrowAsJavaScriptException();
+    return env.Null();
   }
-
-  ListBaton* baton = new ListBaton();
+  Napi::Function callback = info[0].As<Napi::Function>();
+  ListBaton* baton = new ListBaton(callback);
   snprintf(baton->errorString, sizeof(baton->errorString), "");
-  baton->callback.Reset(info[0].As<v8::Function>());
 
-  uv_work_t* req = new uv_work_t();
-  req->data = baton;
-  uv_queue_work(uv_default_loop(), req, EIO_List, (uv_after_work_cb)EIO_AfterList);
+  baton->Queue();
+  return env.Undefined();
 }
 
-void setIfNotEmpty(v8::Local<v8::Object> item, std::string key, const char *value) {
-  v8::Local<v8::String> v8key = Nan::New<v8::String>(key).ToLocalChecked();
+void setIfNotEmpty(Napi::Object item, std::string key, const char *value) {
+  Napi::Env env = item.Env();
+  Napi::String v8key = Napi::String::New(env, key);
   if (strlen(value) > 0) {
-    Nan::Set(item, v8key, Nan::New<v8::String>(value).ToLocalChecked());
+    (item).Set(v8key, Napi::String::New(env, value));
   } else {
-    Nan::Set(item, v8key, Nan::Undefined());
+    (item).Set(v8key, env.Undefined());
   }
 }
 
@@ -271,8 +271,7 @@ static stDeviceListItem* GetSerialDevices() {
   return devices;
 }
 
-void EIO_List(uv_work_t* req) {
-  ListBaton* data = static_cast<ListBaton*>(req->data);
+void ListBaton::Execute() {
 
   if (!lockInitialised) {
     uv_mutex_init(&list_mutex);
@@ -304,7 +303,7 @@ void EIO_List(uv_work_t* req) {
       if (*device.serialNumber) {
         resultItem->serialNumber = device.serialNumber;
       }
-      data->results.push_back(resultItem);
+      results.push_back(resultItem);
 
       stDeviceListItem* current = next;
 
@@ -316,40 +315,3 @@ void EIO_List(uv_work_t* req) {
     }
   }
 }
-
-void EIO_AfterList(uv_work_t* req) {
-  Nan::HandleScope scope;
-
-  ListBaton* data = static_cast<ListBaton*>(req->data);
-
-  v8::Local<v8::Value> argv[2];
-  if (data->errorString[0]) {
-    argv[0] = v8::Exception::Error(Nan::New<v8::String>(data->errorString).ToLocalChecked());
-    argv[1] = Nan::Undefined();
-  } else {
-    v8::Local<v8::Array> results = Nan::New<v8::Array>();
-    int i = 0;
-    for (std::list<ListResultItem*>::iterator it = data->results.begin(); it != data->results.end(); ++it, i++) {
-      v8::Local<v8::Object> item = Nan::New<v8::Object>();
-
-      setIfNotEmpty(item, "path", (*it)->path.c_str());
-      setIfNotEmpty(item, "manufacturer", (*it)->manufacturer.c_str());
-      setIfNotEmpty(item, "serialNumber", (*it)->serialNumber.c_str());
-      setIfNotEmpty(item, "pnpId", (*it)->pnpId.c_str());
-      setIfNotEmpty(item, "locationId", (*it)->locationId.c_str());
-      setIfNotEmpty(item, "vendorId", (*it)->vendorId.c_str());
-      setIfNotEmpty(item, "productId", (*it)->productId.c_str());
-
-      Nan::Set(results, i, item);
-    }
-    argv[0] = Nan::Null();
-    argv[1] = results;
-  }
-  data->callback.Call(2, argv, data);
-
-  for (std::list<ListResultItem*>::iterator it = data->results.begin(); it != data->results.end(); ++it) {
-    delete *it;
-  }
-  delete data;
-  delete req;
-}

packages/bindings/src/darwin_list.h

@@ -1,15 +1,15 @@
 #ifndef PACKAGES_SERIALPORT_SRC_DARWIN_LIST_H_
 #define PACKAGES_SERIALPORT_SRC_DARWIN_LIST_H_
 #include <sys/param.h>  // For MAXPATHLEN
-#include <nan.h>
+#include <napi.h>
+#include <uv.h>
 #include <list>
 #include <string>
 
-#define ERROR_STRING_SIZE 1024
+#define ERROR_STRING_SIZE 1088
 
-NAN_METHOD(List);
-void EIO_List(uv_work_t* req);
-void EIO_AfterList(uv_work_t* req);
+Napi::Value List(const Napi::CallbackInfo& info);
+void setIfNotEmpty(Napi::Object item, std::string key, const char *value);
 
 struct ListResultItem {
   std::string path;
@@ -21,11 +21,33 @@ struct ListResultItem {
   std::string productId;
 };
 
-struct ListBaton : public Nan::AsyncResource {
-  ListBaton() : AsyncResource("node-serialport:ListBaton"), errorString() {}
-  Nan::Callback callback;
+struct ListBaton : public Napi::AsyncWorker {
+  ListBaton(Napi::Function& callback) : Napi::AsyncWorker(callback, "node-serialport:ListBaton"), 
+  errorString() {}
   std::list<ListResultItem*> results;
   char errorString[ERROR_STRING_SIZE];
+  void Execute() override;
+
+  void OnOK() override {
+    Napi::Env env = Env();
+    Napi::HandleScope scope(env);
+    Napi::Array result = Napi::Array::New(env);
+    int i = 0;
+    for (std::list<ListResultItem*>::iterator it = results.begin(); it != results.end(); ++it, i++) {
+      Napi::Object item = Napi::Object::New(env);
+
+      setIfNotEmpty(item, "path", (*it)->path.c_str());
+      setIfNotEmpty(item, "manufacturer", (*it)->manufacturer.c_str());
+      setIfNotEmpty(item, "serialNumber", (*it)->serialNumber.c_str());
+      setIfNotEmpty(item, "pnpId", (*it)->pnpId.c_str());
+      setIfNotEmpty(item, "locationId", (*it)->locationId.c_str());
+      setIfNotEmpty(item, "vendorId", (*it)->vendorId.c_str());
+      setIfNotEmpty(item, "productId", (*it)->productId.c_str());
+
+      (result).Set(i, item);
+    }
+    Callback().Call({env.Null(), result});
+  }
 };
 
 typedef struct SerialDevice {