Generating bindings for Apple APIs

It can be tricky to locate header files containing Apple's Objective-C frameworks, and the paths can vary between computers depending on which version of Xcode you are using and where it is installed. FFIgen provides helper getters that can be used when configuring Input.entryPoints:

• xcodeUri / xcodePath: The directory where Xcode's APIs are installed (resolved via xcode-select -p).
• iosSdkUri / iosSdkPath: The directory within Xcode where the iOS SDK is installed (resolved via xcrun --show-sdk-path --sdk iphoneos).
• macSdkUri / macSdkPath: The directory within Xcode where the macOS SDK is installed (resolved via xcrun --show-sdk-path --sdk macosx).

For example:

final generator = FfiGenerator(
  input: Input(
    entryPoints: [
      // Use macSdkUri to resolve headers within the macOS SDK.
      macSdkUri.resolve(
        'System/Library/Frameworks/Foundation.framework/Headers/NSDate.h',
      ),
    ],
  ),
  output: Output(dart: DartOutput(path: Uri.file('nsdate.dart'))),
);