Use flutter_sdl_gamepads to compile SDL binaries (#175)

Shoutout to @Gold872 for putting in much of the work behind
`package:flutter_sdl_gamepad`

lib/src/services/files.dart

@@ -49,6 +49,8 @@ class FilesService extends Service {
   /// The encoder to convert a Map<> to a json string with a nice indent
   final JsonEncoder jsonEncoder = const JsonEncoder.withIndent("  ");
 
+  bool _isInit = false;
+
   /// Ensure that files and directories that are expected to be present actually
   /// exist on the system. If not, create them.
   @override
@@ -58,6 +60,7 @@ class FilesService extends Service {
     loggingDir = await Directory("${outputDir.path}/logs/${DateTime.now().timeStamp}").create(recursive: true);
     if (!settingsFile.existsSync()) await writeSettings(null);
     dataLogger = Timer.periodic(const Duration(seconds: 5), logAllData);
+    _isInit = true;
   }
 
   @override
@@ -139,6 +142,7 @@ class FilesService extends Service {
 
   /// Outputs error to log file
   Future<void> logError(Object error, StackTrace stack) async{
+    if (!_isInit) return;
     final file = loggingDir / "errors.log";
     await file.writeAsString("${DateTime.now().timeStamp} $error $stack\n", mode: FileMode.writeOnlyAppend);
   }

lib/src/services/gamepad/sdl.dart

@@ -1,4 +1,4 @@
-import "package:sdl_gamepad/sdl_gamepad.dart" as sdl;
+import "package:flutter_sdl_gamepad/flutter_sdl_gamepad.dart" as sdl;
 
 import "state.dart";
 import "gamepad.dart";

lib/src/services/gamepad/service.dart

@@ -1,4 +1,4 @@
-import "package:sdl_gamepad/sdl_gamepad.dart";
+import "package:flutter_sdl_gamepad/flutter_sdl_gamepad.dart";
 
 import "../service.dart";
 import "gamepad.dart";
@@ -45,7 +45,9 @@ class GamepadService extends Service {
 
   @override
   Future<void> init() async {
-    SdlLibrary.init();
+    if (!SdlLibrary.init()) {
+      throw StateError("Could not initialize SDL libraries");
+    }
     gamepads = List.generate(maxGamepads, MockGamepad.new);
     for (var i = 0; i < maxGamepads; i++) {
       await connect(i);

linux/flutter/generated_plugins.cmake

@@ -8,6 +8,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
+  flutter_sdl_gamepad
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)

pubspec.lock

@@ -207,6 +207,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.0"
+  flutter_sdl_gamepad:
+    dependency: "direct main"
+    description:
+      name: flutter_sdl_gamepad
+      sha256: "513910280591bdc5362dda0c0a8d53b310f0d9e5f53c4188ddaf13f7339847b0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -498,13 +506,13 @@ packages:
     source: hosted
     version: "0.1.34"
   sdl_gamepad:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: sdl_gamepad
-      sha256: "5d1931dc4e4831dc298a1964b94d4e5a257b027ad5ce268620c6b5e15a46c70b"
+      sha256: "3bce11dbf7da9a543ce17177342171d5033a2b7198dbfa51b5bee7cdc45d4ac2"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.1"
+    version: "1.0.2"
   sky_engine:
     dependency: transitive
     description: flutter

pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   url_launcher: ^6.1.10
   just_audio: ^0.9.36
   collection: ^1.18.0
-  sdl_gamepad: ^1.0.1
+  flutter_sdl_gamepad: ^1.0.0
 
 # Prefer to use `flutter pub add --dev packageName` rather than modify this section by hand.
 dev_dependencies:

windows/flutter/generated_plugins.cmake

@@ -8,6 +8,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
+  flutter_sdl_gamepad
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)