Add GitHub action to build Tonlib for Android OS (#517)

* GitHub action to build native-lib (tonlibjson) JNI library for Android (x86, x86_64, armeabi-v7a, arm64-v8a);
Cleanup fossil actions;

* update actions/checkout to v3

* update actions/checkout to v3

* silent removal of TonApi.java

* remove *.debug files

* minor fix

* strip files; add README.md

* put back ninja

* correct spelling

* correct README.md

* fix README.md

.github/workflows/tonlib-android-jni.yml

@@ -0,0 +1,56 @@
+name: Tonlib Android JNI
+
+on: [push,workflow_dispatch,workflow_call]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-22.04
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v3
+      with:      
+        submodules: 'recursive'
+
+    - name: Install libraries
+      run: |
+        sudo apt update
+        sudo apt install -y build-essential git make cmake clang libgflags-dev zlib1g-dev libssl-dev libreadline-dev libmicrohttpd-dev pkg-config libgsl-dev python3 python3-dev ninja-build
+
+    - name: Configure & Build
+      run: |        
+        wget https://dl.google.com/android/repository/android-ndk-r25b-linux.zip
+        unzip android-ndk-r25b-linux.zip
+        export JAVA_AWT_LIBRARY=NotNeeded
+        export JAVA_JVM_LIBRARY=NotNeeded
+        export JAVA_INCLUDE_PATH=${JAVA_HOME}/include
+        export JAVA_AWT_INCLUDE_PATH=${JAVA_HOME}/include
+        export JAVA_INCLUDE_PATH2=${JAVA_HOME}/include/linux
+        
+        export ANDROID_NDK_ROOT=$(pwd)/android-ndk-r25b
+        export OPENSSL_DIR=$(pwd)/example/android/third_party/crypto
+        
+        rm -rf example/android/src/drinkless/org/ton/TonApi.java
+        cd example/android/
+        cmake -GNinja -DTON_ONLY_TONLIB=ON . 
+        ninja prepare_cross_compiling
+        rm CMakeCache.txt
+        ./build-all.sh
+        ../../android-ndk-r25b/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip libs/x86/libnative-lib.so
+        ../../android-ndk-r25b/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip libs/x86_64/libnative-lib.so
+        ../../android-ndk-r25b/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip libs/armeabi-v7a/libnative-lib.so
+        ../../android-ndk-r25b/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip libs/arm64-v8a/libnative-lib.so
+        find . -name "*.debug" -type f -delete
+
+    - name: Find & copy binaries
+      run: |
+        mkdir -p artifacts/tonlib-android-jni        
+        cp example/android/src/drinkless/org/ton/TonApi.java artifacts/tonlib-android-jni/
+        cp -R example/android/libs/* artifacts/tonlib-android-jni/
+
+    - name: Upload artifacts
+      uses: actions/upload-artifact@master
+      with:
+        name: Tonlib JNI libraries for Android
+        path: artifacts

example/android/README.md

@@ -0,0 +1,48 @@
+# Generation of Tonlib libraries for Android OS
+**Tl;dr** Download the latest version of Tonlib libraries for Android from TON release page or check the artifacts from [Android JNI GitHub action](https://github.com/ton-blockchain/ton/actions/workflows/tonlib-android-jni.yml).
+
+## Compile Tonlib for Android manually 
+Prerequisite: installed Java and set environment variable JAVA_HOME. 
+```bash
+git clone --recursive https://github.com/ton-blockchain/ton.git
+cd ton
+wget https://dl.google.com/android/repository/android-ndk-r25b-linux.zip
+unzip android-ndk-r25b-linux.zip
+export JAVA_AWT_LIBRARY=NotNeeded
+export JAVA_JVM_LIBRARY=NotNeeded
+export JAVA_INCLUDE_PATH=${JAVA_HOME}/include
+export JAVA_AWT_INCLUDE_PATH=${JAVA_HOME}/include
+export JAVA_INCLUDE_PATH2=${JAVA_HOME}/include/linux
+
+export ANDROID_NDK_ROOT=$(pwd)/android-ndk-r25b
+export OPENSSL_DIR=$(pwd)/example/android/third_party/crypto
+
+rm -rf example/android/src/drinkless/org/ton/TonApi.java
+cd example/android/
+cmake -GNinja -DTON_ONLY_TONLIB=ON . 
+ninja prepare_cross_compiling
+rm CMakeCache.txt
+./build-all.sh
+```
+# Generation of Tonlib libraries for iOS in Xcode
+
+1. Clone repository https://github.com/labraburn/tonlib-xcframework
+2. Open repository directory in Terminal
+3. Run command:
+```bash
+swift run builder --output ./build --clean
+```
+5. Run command:
+```bash
+echo ./build/TON.xcframework/* | xargs -n 1 cp -R ./Resources/Headers
+````
+7. Import **OpenSSL.xcframework** and **TON.xcframework** in XCode in section _"Frameworks, Libraries, and Embedded Content"_
+8. Now you can start using Tonlib client by importing it in C or Objective-C source files:
+```objective-c
+#import <tonlib/tonlib_client_json.h>
+```
+
+# Generation of Tonlib libraries for Desktop applications
+You can use Tonlib compiled in an ordinary way for desktop applications. If you use Java you can load the library using JNA.
+
+The latest Tonlib library can be found among other TON artifacts either on TON release page or inside the [appropriate GitHub action](https://github.com/ton-blockchain/ton/actions/).

example/android/build.sh

@@ -33,8 +33,7 @@ mkdir -p build-$ARCH
 cd build-$ARCH
 
 
-cmake .. \
+cmake .. -DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake -DCMAKE_BUILD_TYPE=Release -GNinja -DANDROID_ABI=${ABI} -DOPENSSL_ROOT_DIR=${OPENSSL_DIR}/${ARCH} -DTON_ARCH="" -DTON_ONLY_TONLIB=ON || exit 1
-  -DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake -DCMAKE_BUILD_TYPE=Release -GNinja -DANDROID_ABI=${ABI} -DOPENSSL_ROOT_DIR=${OPENSSL_DIR}/${ARCH} -DTON_ARCH="" -DTON_ONLY_TONLIB=ON || exit 1
 ninja native-lib || exit 1
 popd