Dockerfile

# Inspired by https://github.com/matsp/docker-flutter/blob/3cd6be2dad8deb6b984892e300db5dad18f78c73/stable/Dockerfile.
# Used by VSCode dev containers and GitHub Actions.
FROM ubuntu:20.04

ARG USER="gitpod"

ENV HOME=/home/${USER}
ENV JAVA_VERSION="8"
ENV ANDROID_TOOLS_URL="https://dl.google.com/android/repository/commandlinetools-linux-6858069_latest.zip"
ENV ANDROID_VERSION="29"
ENV ANDROID_BUILD_TOOLS_VERSION="29.0.3"
ENV ANDROID_ARCHITECTURE="x86_64"
ENV ANDROID_SDK_ROOT="$HOME/android"
ENV FLUTTER_CHANNEL="stable"
ENV FLUTTER_VERSION="1.22.0"
ENV FLUTTER_URL="https://storage.googleapis.com/flutter_infra/releases/$FLUTTER_CHANNEL/linux/flutter_linux_$FLUTTER_VERSION-$FLUTTER_CHANNEL.tar.xz"
ENV FLUTTER_HOME="$HOME/flutter"
ENV FLUTTER_WEB_PORT="8090"
ENV FLUTTER_DEBUG_PORT="42000"
ENV FLUTTER_EMULATOR_NAME="flutter_emulator"
ENV PATH="$ANDROID_SDK_ROOT/cmdline-tools/tools/bin:$ANDROID_SDK_ROOT/emulator:$ANDROID_SDK_ROOT/platform-tools:$ANDROID_SDK_ROOT/platforms:$FLUTTER_HOME/bin:$PATH"

# Install all dependencies.
ENV DEBIAN_FRONTEND="noninteractive"
RUN apt-get update \
    && apt-get install --yes --no-install-recommends openjdk-$JAVA_VERSION-jdk curl unzip sed git bash xz-utils libglvnd0 ssh xauth x11-xserver-utils libpulse0 libxcomposite1 libgl1-mesa-glx gnupg2 ruby-dev build-essential locales sudo \
    && rm -rf /var/lib/{apt,dpkg,cache,log}

# Fastlane requires UTF-8. See https://docs.fastlane.tools/getting-started/ios/setup/#set-up-environment-variables.
# Inspired by https://stackoverflow.com/a/2840600.
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8

# Create user. Based on https://github.com/gitpod-io/workspace-images/blob/481f7600b725e0ab507fbf8377641a562a475625/base/Dockerfile.
# '-l': see https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#user
RUN if [ "${USER}" != "root" ] ; then \
    useradd -l -u 33333 -G sudo -md /home/${USER} -s /bin/bash -p ${USER} ${USER} \
    # passwordless sudo for users in the 'sudo' group
    && sed -i.bkp -e 's/%sudo\s\+ALL=(ALL\(:ALL\)\?)\s\+ALL/%sudo ALL=NOPASSWD:ALL/g' /etc/sudoers ; fi
WORKDIR $HOME

USER ${USER}
# use sudo so that user does not get sudo usage info on (the first) login
RUN sudo echo "Running 'sudo' for ${USER}: success" && \
    # create .bashrc.d folder and source it in the bashrc
    mkdir -p $HOME/.bashrc.d && \
    (echo; echo "for i in \$(ls -A \$HOME/.bashrc.d/); do source \$HOME/.bashrc.d/\$i; done"; echo) >> $HOME/.bashrc

# Install Android SDK.
RUN mkdir -p $ANDROID_SDK_ROOT \
    && mkdir -p $HOME/.android \
    && touch $HOME/.android/repositories.cfg \
    && curl -o android_tools.zip $ANDROID_TOOLS_URL \
    && unzip -qq -d "$ANDROID_SDK_ROOT" android_tools.zip \
    && rm android_tools.zip \
    && mkdir -p $ANDROID_SDK_ROOT/cmdline-tools/tools \
    && mv $ANDROID_SDK_ROOT/cmdline-tools/bin $ANDROID_SDK_ROOT/cmdline-tools/tools \
    && mv $ANDROID_SDK_ROOT/cmdline-tools/lib $ANDROID_SDK_ROOT/cmdline-tools/tools \
    && yes "y" | sdkmanager "build-tools;$ANDROID_BUILD_TOOLS_VERSION" \
    && yes "y" | sdkmanager "platforms;android-$ANDROID_VERSION" \
    && yes "y" | sdkmanager "platform-tools" \
    && yes "y" | sdkmanager "emulator" \
    && yes "y" | sdkmanager "system-images;android-$ANDROID_VERSION;google_apis_playstore;$ANDROID_ARCHITECTURE"

# Install Flutter.
RUN curl -o flutter.tar.xz $FLUTTER_URL \
    && mkdir -p $FLUTTER_HOME \
    && tar xf flutter.tar.xz -C $HOME \
    && rm flutter.tar.xz \
    && git config --global --add safe.directory $FLUTTER_HOME \
    && flutter config --no-analytics \
    && flutter precache \
    && yes "y" | flutter doctor --android-licenses \
    && flutter doctor \
    && flutter emulators --create \
    && flutter update-packages

# Install Ruby bundler (needed to install Fastlane dependency).
RUN sudo gem install bundler

# When source code is mounted, continue with `entrypoint.sh`.