README for compile_rust_for_flutter.sh

This script compiles a Rust library for both Android and iOS and copies the generated libraries to the appropriate Flutter project directories.

Features:

• Compiles Rust for Android using cargo-ndk for arm64-v8a, armeabi-v7a, x86_64, and x86 architectures.
• Conditionally compiles Rust for iOS if running on macOS.
• Automatically cleans the build directory before compiling.
• Copies .so (Android) and .a (iOS) files to the Flutter project.

Usage:

1. Ensure the following are installed:

   • cargo-ndk: cargo install cargo-ndk
   • Android NDK (set ANDROID_NDK_HOME or ANDROID_SDK_ROOT)
   • Rust toolchains for iOS targets if compiling on macOS

2. Run the script:

   ./compile_rust_for_flutter.sh <path_to_rust_project> <path_to_flutter_project>
   

Example:

./compile_rust_for_flutter.sh ./rust_project ./flutter_project

Notes:

• Android libraries are copied to android/app/src/main/jniLibs/<arch>.
• iOS libraries are copied to the ios directory.