Dockerfile

# base image for APK builds
FROM ubuntu:jammy

RUN --mount=type=cache,target=/var/cache/apt apt-get update
# make...python3 for tflite build
# nasm for x264
RUN --mount=type=cache,target=/var/cache/apt apt-get install -qy \
    zip \
    openjdk-21-jdk-headless \
    make curl patch cmake git python3 wget pkg-config \
    nasm

ENV ANDROID_HOME=/droid
ENV ANDROID_SDK_ROOT=/droid

WORKDIR ${ANDROID_SDK_ROOT}

# https://developer.android.com/studio#command-line-tools-only
ARG CLI_TOOLS=commandlinetools-linux-11076708_latest.zip
RUN curl --fail --silent --show-error -o ${CLI_TOOLS} https://dl.google.com/android/repository/${CLI_TOOLS} && unzip -q ${CLI_TOOLS} && rm ${CLI_TOOLS}

ENV PATH=${PATH}:/droid/cmdline-tools/bin
ARG NDK_VERSION=26.2.11394342
ENV NDK_ROOT=${ANDROID_SDK_ROOT}/ndk/${NDK_VERSION}

# note: we target android 28, but compileSdk is 34 in our gradle files; check if both are needed
# we're removing unused tools to shrink the image size
RUN yes | sdkmanager --sdk_root=$(realpath .) --install "platforms;android-28" "platforms;android-34" "build-tools;26.0.3" "ndk;${NDK_VERSION}" \
    && rm -rf emulator \
    && rm -rf tools/lib/monitor* \
    && rm -rf ${NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/musl

ENV SDKMAN_DIR=/usr/local/sdkman
# this is the sdk manager script from https://get.sdkman.io/
# we have a copy checked-in to get a consistent version
# todo: look at getting openjdk from here as well
RUN --mount=type=bind,source=etc/get-sdkman.sh,target=get-sdkman.sh ./get-sdkman.sh
# requires bash because it uses 'source' keyword internally
RUN bash -c "source $SDKMAN_DIR/bin/sdkman-init.sh && sdk install gradle 8.2"

# note: actions/setup-go fails at the jni step in a way I don't understand. manually installing for now.
ARG GO_VERSION=1.23.2
RUN wget --quiet https://go.dev/dl/go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz \
	&& tar xf go*.linux-*.tar.gz -C /usr/local/lib \
	&& mv /usr/local/lib/go /usr/local/lib/go-${GO_VERSION} \
	&& rm go*.linux-*.tar.gz \
	&& update-alternatives --install /usr/bin/go go /usr/local/lib/go-${GO_VERSION}/bin/go 10 \
	    --slave /usr/bin/gofmt gofmt /usr/local/lib/go-${GO_VERSION}/bin/gofmt

# todo: pin gomobile in rdk tools.go
ENV PATH=${PATH}:/root/go/bin
RUN go install golang.org/x/mobile/cmd/gomobile@latest && gomobile init