Add Android build system (builds android SFML example)

docker-scripts/build-dockers/Dockerfile_Android

@@ -0,0 +1,33 @@
+################################################################################
+###  Build Android                                                           ###
+################################################################################
+# Different from all others
+FROM saschpe/android-ndk:31-jdk11.0.13_8-ndk23.0.7599858-cmake3.18.1 as builderandroid
+RUN apt update && apt install -y lsb-release g++ build-essential wget git libssl-dev pkg-config zip unzip
+RUN wget https://github.com/Kitware/CMake/releases/download/v3.30.2/cmake-3.30.2.tar.gz
+RUN tar -xvf cmake-3.30.2.tar.gz
+RUN cd cmake-3.30.2 && ./bootstrap && make -j && make install
+RUN curl -s "https://get.sdkman.io" | bash
+RUN /bin/bash -c "source /root/.sdkman/bin/sdkman-init.sh ; sdk install gradle 7.6.2"
+RUN sdkmanager "build-tools;30.0.3" "cmake;3.22.1"
+ENV ANDROID_SDK_VERSION="31"
+ENV ANDROID_HOME="/opt/android-sdk-linux"
+ENV ANDROID_NDK_VERSION="23.0.7599858"
+ENV ANDROID_NDK_HOME="$ANDROID_HOME/ndk/$ANDROID_NDK_VERSION"
+ENV GRADLE_DIR="/home/builder/gradle"
+ENV GRADLE_HOME="$GRADLE_DIR/current"
+ENV GRADLE_USER_HOME=$GRADLE_HOME
+ENV PATH="$ANDROID_HOME:$GRADLE_HOME/bin:$ANDROID_NDK_HOME:$PATH"
+RUN useradd builder -m
+RUN mkdir -p /home/builder/cc3dsfs
+RUN mkdir -p /home/builder/building
+RUN chown -R builder:builder /home/builder
+WORKDIR /home/builder/building
+COPY  docker_build_starter /
+RUN chmod +x /docker_build_starter
+RUN chown -R builder:builder $ANDROID_HOME
+RUN mkdir -p $GRADLE_DIR
+RUN mv /root/.sdkman/candidates/gradle/* $GRADLE_DIR/
+RUN chown -R builder:builder $GRADLE_DIR
+USER builder
+CMD /docker_build_starter docker-scripts/docker_build_android

docker-scripts/build-dockers/build-builder.sh

@@ -7,3 +7,5 @@ docker image rm lorenzooone/cc3dsfs:builderarm32
 docker build --target builderarm32 . -t lorenzooone/cc3dsfs:builderarm32
 docker image rm lorenzooone/cc3dsfs:builderarm64
 docker build --target builderarm64 . -t lorenzooone/cc3dsfs:builderarm64
+docker image rm lorenzooone/cc3dsfs:builderandroid
+docker build --target builderandroid . -f Dockerfile_Android -t lorenzooone/cc3dsfs:builderandroid

docker-scripts/docker_build_android

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+SFML_EXTRACTED_TO_FOLDER=~
+SFML_EXTRACTED_FOLDER=${SFML_EXTRACTED_TO_FOLDER}/SFML-master
+BUILD_ARCH_COMMAND=docker-scripts/docker_build_android_single_arch
+
+STL_CHOSEN=c++_static
+RELEASE_TYPE=Debug
+OUT_FOLDER=~/cc3dsfs/build
+ANDROID_FOLDER=${SFML_EXTRACTED_FOLDER}/examples/android
+
+export LANG=C.UTF-8
+
+(cd ${SFML_EXTRACTED_TO_FOLDER} ; wget https://github.com/SFML/SFML/archive/refs/heads/master.zip ; unzip master.zip)
+#${BUILD_ARCH_COMMAND} ${SFML_EXTRACTED_FOLDER} armeabi-v7a ${STL_CHOSEN} ${RELEASE_TYPE} ${OUT_FOLDER} ${ANDROID_FOLDER}
+${BUILD_ARCH_COMMAND} ${SFML_EXTRACTED_FOLDER} arm64-v8a ${STL_CHOSEN} ${RELEASE_TYPE} ${OUT_FOLDER} ${ANDROID_FOLDER}

docker-scripts/docker_build_android_single_arch

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+SFML_FOLDER=$1
+ARCH_CHOSEN=$2
+STL_CHOSEN=$3
+RELEASE_TYPE=$4
+OUT_FOLDER=$5
+ANDROID_FOLDER=$6
+GRADLE_FLAGS=""
+
+add_to_gradle_flags()
+{
+	to_add=$1
+	GRADLE_FLAGS="${GRADLE_FLAGS} -P${to_add}"
+}
+
+to_lower()
+{
+	echo "$1" | tr '[:upper:]' '[:lower:]'
+}
+
+(cd ${SFML_FOLDER} ; mkdir -p build/${ARCH_CHOSEN})
+(cd ${SFML_FOLDER}/build/${ARCH_CHOSEN} ; cmake -DCMAKE_SYSTEM_NAME=Android -DCMAKE_ANDROID_NDK=${ANDROID_NDK_HOME} -DCMAKE_ANDROID_ARCH_ABI=${ARCH_CHOSEN} -DCMAKE_ANDROID_STL_TYPE=${STL_CHOSEN} -DCMAKE_BUILD_TYPE=${RELEASE_TYPE} ../.. ; make ; make install)
+add_to_gradle_flags NDK_VERSION=${ANDROID_NDK_VERSION}
+add_to_gradle_flags ARCH_ABI=${ARCH_CHOSEN}
+add_to_gradle_flags TARGET_SDK=${ANDROID_SDK_VERSION}
+add_to_gradle_flags STL_TYPE=${STL_CHOSEN}
+LOWER_RELEASE_TYPE=$(to_lower $RELEASE_TYPE)
+# Default with gradle-wrapper, slow in docker
+#./gradlew assemble${RELEASE_TYPE} ${GRADLE_FLAGS}
+# Use the pre-donwloaded gradle to speed build up
+(cd ${ANDROID_FOLDER} && gradle assemble${RELEASE_TYPE} ${GRADLE_FLAGS} && mkdir -p ${OUT_FOLDER} && cp app/build/outputs/apk/${LOWER_RELEASE_TYPE}/*.apk ${OUT_FOLDER})