content: # Build app
  # Deploy using Alma Linux
  
  ARG BASE_OS=almalinux
  
  # Specify versions of Erlang, Elixir, and base OS.
  # Choose a combination supported by https://hub.docker.com/r/hexpm/elixir/tags
  
  ARG ELIXIR_VER=1.18.4
  ARG OTP_VER=28.0.1
  
  # https://hub.docker.com/_/almalinux
  ARG BUILD_OS_VER=8
  ARG PROD_OS_VER=8
  
  ARG NODE_VER=24.0.1
  ARG NODE_MAJOR=24
  ARG YARN_VER=1.22.22
  
  # Docker registry for internal images, e.g. 123.dkr.ecr.ap-northeast-1.amazonaws.com/
  # If blank, docker.io will be used. If specified, should have a trailing slash.
  ARG REGISTRY=""
  # Registry for public images such as debian, alpine, or postgres.
  ARG PUBLIC_REGISTRY=""
  # Public images may be mirrored into the private registry, with e.g. Skopeo
  # ARG PUBLIC_REGISTRY=$REGISTRY
  
  # Base image for build and test
  ARG BUILD_BASE_IMAGE_NAME=${PUBLIC_REGISTRY}${BASE_OS}
  ARG BUILD_BASE_IMAGE_TAG=$PROD_OS_VER
  # ARG BUILD_BASE_IMAGE_TAG=8
  
  # Base for final prod image
  ARG PROD_BASE_IMAGE_NAME=${PUBLIC_REGISTRY}${BASE_OS}
  ARG PROD_BASE_IMAGE_TAG=$PROD_OS_VER
  # ARG PROD_BASE_IMAGE_TAG=8
  
  # Intermediate image for files copied to prod
  ARG INSTALL_BASE_IMAGE_NAME=$PROD_BASE_IMAGE_NAME
  ARG INSTALL_BASE_IMAGE_TAG=$PROD_BASE_IMAGE_TAG
  
  # App name, used to name directories
  ARG APP_NAME=app
  
  # Dir where app is installed
  ARG APP_DIR=/app
  
  # OS user for app to run under
  # nonroot:x:65532:65532:nonroot:/home/nonroot:/usr/sbin/nologin
  # nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
  ARG APP_USER=nonroot
  # OS group that app runs under
  ARG APP_GROUP=$APP_USER
  # OS numeric user and group id
  ARG APP_USER_ID=65532
  ARG APP_GROUP_ID=$APP_USER_ID
  
  ARG LANG=C.UTF-8
  # ARG LANG=en_US.UTF-8
  
  # Elixir release env to build
  ARG MIX_ENV=prod
  
  # Name of Elixir release
  # This should match mix.exs releases()
  ARG RELEASE=prod
  
  # App listen port
  ARG APP_PORT=4000
  
  # Allow additional packages to be injected into builds
  # These variables must always have something defined
  ARG RUNTIME_PACKAGES="ca-certificates"
  ARG DEV_PACKAGES="inotify-tools"
  
  
  # Create build base image with OS dependencies
  FROM ${BUILD_BASE_IMAGE_NAME}:${BUILD_BASE_IMAGE_TAG} AS build-os-deps
  ARG APP_DIR
  ARG APP_GROUP
  ARG APP_GROUP_ID
  ARG APP_USER
  ARG APP_USER_ID
  
  # Create OS user and group to run app under
  RUN if ! grep -q "$APP_USER" /etc/passwd; \
      then groupadd -g "$APP_GROUP_ID" "$APP_GROUP" && \
      useradd -l -u "$APP_USER_ID" -g "$APP_GROUP" -d "$APP_DIR" -s /usr/sbin/nologin "$APP_USER" && \
      rm -f /var/log/lastlog && rm -f /var/log/faillog; fi
  
  ARG RUNTIME_PACKAGES
  
  # Install tools and libraries to build binary libraries
  RUN --mount=type=cache,id=dnf-cache,target=/var/cache/dnf,sharing=locked \
      set -ex ; \
      # add config-manager plugin
      dnf install -y --nodocs dnf-plugins-core ; \
      # dnf config-manager --set-enabled powertools ; \
      # dnf config-manager --set-enabled devel ; \
      dnf install -y epel-release ; \
      /usr/bin/crb enable ; \
      dnf upgrade -y ; \
      # dnf makecache --refresh ; \
      dnf group install -y 'Development Tools' ; \
      dnf builddep erlang -y ; \
      dnf install -y --nodocs --allowerasing \
          cmake \
          cmake3 \
          curl \
          git \
          # glibc-langpack -en \
          glibc-minimal-langpack \
          gpg \
          make \
          # useradd and groupadd
          shadow-utils \
          unzip \
          wget \
      # http://erlang.org/doc/installation_guide/INSTALL.html#required-utilities
      # https://github.com/asdf-vm/asdf-erlang
      # bin/build-install-asdf-deps-centos ; \
      # https://github.com/asdf-vm/asdf-erlang/issues/206
      # rpm --eval '%{_arch}' ; \
          # autoconf \
          # automake \
          # bison \
          # flex \
          # gcc \
          # gcc-c++ \
          # fop \
          # java-1.8.0-openjdk-devel \
          # java-11-openjdk-devel \
          libffi-devel \
          libiodbc \
          # libtool \
          libxslt \
          libxslt-devel \
          libyaml \
          # libyaml-devel \
          lksctp-tools-devel \
          mesa-libGL-devel \
          ncurses-devel \
          openssl \
          openssl-devel \
          readline-devel \
          sqlite-devel \
          unixODBC-devel \
          wxGTK3 wxGTK3-devel wxGTK3-gl wxGTK3-media
          # wxBase3 \
          # erlang-odbc
          # $RUNTIME_PACKAGES \
      # ; \
      # dnf clean all
      # dnf clean all ; rm -rf /var/cache/dnf
  
  # https://github.com/esl/packages/blob/master/builders/erlang_centos.Dockerfile
  
  ENV HOME=$APP_DIR
  
  WORKDIR $APP_DIR
  
  COPY  bi[n] ./bin
  
  # Set up ASDF
  RUN set -ex ; \
      export LD_LIBRARY_PATH="/usr/lib64:$LD_LIBRARY_PATH" ; \
      bin/build-install-asdf-init
  
  ENV ASDF_DIR="$HOME/.asdf"
  ENV PATH=$ASDF_DIR/bin:$ASDF_DIR/shims:$PATH
  
  COPY .tool-versions ./
  
  ARG ELIXIR_VER
  ARG NODE_MAJOR
  ARG NODE_VER
  ARG OTP_VER
  ARG REBAR_VER
  ARG YARN_VER
  
  # Install using asdf
  RUN set -ex ; \
      # Install using .tool-versions versions
      asdf install ; \
      # asdf install erlang "$OTP_VER" ; \
      # asdf install elixir "$ELIXIR_VER" ; \
      # asdf install nodejs "$NODE_VER" ; \
      # asdf install yarn "$YARN_VER" ; \
      # asdf install rebar "${REBAR_VER}" ; \
      # export RPM_ARCH=$(rpm --eval '%{_arch}') ; \
      # echo "RPM_ARCH=$RPM_ARCH" ; \
      # if [ "${RPM_ARCH}" = "x86_64" ]; then \
      #   # Install Erlang from erlang-solutions RPM
      #   bin/build-install-deps-alma; \
      # else \
      #   # Install using asdf
      #   # bin/build-install-asdf
      #   asdf install erlang; \
      # fi ; \
      erl -version ; \
      elixir -v ; \
      node -v
  
  
  # Get Elixir deps
  FROM build-os-deps AS build-deps-get
  ARG APP_DIR
  ENV HOME=$APP_DIR
  
  WORKDIR $APP_DIR
  
  RUN mix 'do' local.rebar --force, local.hex --force
  
  # COPY --link .env.defaul[t] ./
  
  # Copy only the minimum files needed for deps, improving caching
  COPY --link mix.exs mix.lock ./
  # COPY --link config ./config
  
  # Add private repo for Oban
  RUN --mount=type=secret,id=oban_license_key --mount=type=secret,id=oban_key_fingerprint \
      if test -s /run/secrets/oban_license_key; then \
          mix hex.repo add oban https://getoban.pro/repo \
              --fetch-public-key "$(cat /run/secrets/oban_key_fingerprint)" \
              --auth-key "$(cat /run/secrets/oban_license_key)"; \
      fi
  
  # Run deps.get with optional authentication to access private repos
  RUN --mount=type=ssh --mount=type=secret,id=access_token \
      # Access private repos using ssh identity
      # https://docs.docker.com/engine/reference/commandline/buildx_build/#ssh
      # https://stackoverflow.com/questions/73263731/dockerfile-run-mount-type-ssh-doesnt-seem-to-work
      # Copying a predefined known_hosts file would be more secure, but would need to be maintained
      if test -n "$SSH_AUTH_SOCK"; then \
          set -exu ; \
          mkdir -p /etc/ssh ; \
          ssh-keyscan github.com > /etc/ssh/ssh_known_hosts ; \
          mix deps.get ; \
      # Access private repos using access token
      elif test -s /run/secrets/access_token; then \
          GIT_ASKPASS=/run/secrets/access_token mix deps.get ; \
      else \
          mix deps.get ; \
      fi
  
  
  # Create base image for tests
  FROM build-deps-get AS test-image
  ARG LANG
  ARG APP_DIR
  
  ENV MIX_ENV=test
  
  WORKDIR $APP_DIR
  
  # Postman tests
  # RUN npm install -g newman
  # RUN npm install -g newman-reporter-junitfull
  COPY --link Postma[n] ./Postman
  
  # COPY --link config ./config
  COPY --link config/config.exs "config/${MIX_ENV}.exs" ./config/
  
  # Compile deps separately from app, improving Docker caching
  RUN mix deps.compile
  
  # Use glob pattern to deal with files which may not exist
  # Must have at least one existing file
  COPY --link .formatter.ex[s] coveralls.jso[n] .credo.ex[s] dialyzer-ignor[e] trivy.yam[l] ./
  
  # Generate Dialyzer files for deps
  RUN mix dialyzer --plt
  
  COPY --link li[b] ./lib
  COPY --link app[s] ./apps
  
  # Old Phoenix
  COPY --link we[b] ./web
  
  # Erlang files
  COPY --link sr[c] ./src
  COPY --link includ[e] ./include
  COPY --link template[s] ./templates
  
  COPY --link priv ./priv
  COPY --link test ./test
  # COPY --link bi[n] ./bin
  
  # Load environment vars when compiling
  COPY --link .env.tes[t] ./
  RUN if test -f .env.test ; then set -a ; . ./.env.test ; set +a ; env ; fi ; \
      mix compile --warnings-as-errors
  
  # For umbrella, using `mix cmd` ensures each app is compiled in
  # isolation https://github.com/elixir-lang/elixir/issues/9407
  # RUN mix cmd mix compile --warnings-as-errors
  
  
  # Create Elixir release
  FROM build-deps-get AS prod-release
  ARG LANG
  ARG APP_DIR
  
  WORKDIR $APP_DIR
  
  # Build assets
  RUN mkdir -p ./assets
  
  # Install JavaScript deps
  COPY --link assets/package.jso[n] assets/package-lock.jso[n] assets/yarn.loc[k] assets/brunch-config.j[s] ./assets/
  
  WORKDIR ${APP_DIR}/assets
  
  # Install JavaScript dependencies
  RUN --mount=type=cache,target=~/.npm,sharing=locked \
      # corepack enable ; corepack enable npm ; \
      # yarn --cwd ./assets install --prod
      yarn install --prod
      # pnpm install --prod
      # npm install
      # npm run deploy
      # npm --prefer-offline --no-audit --progress=false --loglevel=error ci
      # node node_modules/brunch/bin/brunch build
      # node node_modules/webpack/bin/webpack.js --mode production
  
  WORKDIR $APP_DIR
  
  # Compile deps separately from the application for better Docker caching.
  # Doing "mix 'do' compile, assets.deploy" in a single stage is worse
  # because a single line of code changed causes a complete recompile.
  
  COPY --link .env.pro[d] ./
  
  ARG MIX_ENV
  # COPY --link config ./config
  COPY --link config/config.exs "config/${MIX_ENV}.exs" ./config/
  
  # Load environment vars when compiling
  RUN if test -f .env.prod ; then set -a ; . ./.env.prod ; set +a ; env ; fi ; \
      mix deps.compile
  
  COPY --link li[b] ./lib
  COPY --link app[s] ./apps
  
  # Old Phoenix
  COPY --link we[b] ./web
  
  # Erlang files
  COPY --link sr[c] ./src
  COPY --link includ[e] ./include
  COPY --link template[s] ./templates
  
  COPY --link priv ./priv
  COPY --link assets ./assets
  
  COPY --link bi[n] ./bin
  
  # For umbrella, using `mix cmd` ensures each app is compiled in
  # isolation https://github.com/elixir-lang/elixir/issues/9407
  # RUN mix cmd mix compile --warnings-as-errors
  
  RUN if test -f .env.prod ; then set -a ; . ./.env.prod ; set +a ; env ; fi ; \
      mix compile --warnings-as-errors
  
  RUN mix assets.setup
  
  RUN mix assets.deploy
  
  # Build release
  COPY --link config/runtime.exs ./config/
  
  COPY --link rel ./rel
  
  # Generate systemd and deploy scripts
  # RUN mix do systemd.init, systemd.generate, deploy.init, deploy.generate
  
  ARG RELEASE
  RUN mix release "$RELEASE"
  
  # Create revision for CodeDeploy
  # WORKDIR /revision
  # COPY appspec.yml ./
  # RUN set -exu ; \
  #     mkdir -p etc bin systemd ; \
  #     chmod +x /app/bin/* ; \
  #     cp /app/bin/* ./bin/ ; \
  #     cp /app/_build/${MIX_ENV}/systemd/lib/systemd/system/* ./systemd/ ; \
  #     cp /app/_build/${MIX_ENV}/${RELEASE}-*.tar.gz "./${RELEASE}.tar.gz" ; \
  #     zip -r /revision.zip . ; \
  #     rm -rf /revision/*
  
  # Create release package for Ansible
  # WORKDIR /ansible
  # RUN set -exu ; \
  #     mkdir -p _build/${MIX_ENV}/systemd/lib/systemd/system ; \
  #     cp /app/_build/${MIX_ENV}/systemd/lib/systemd/system/* _build/${MIX_ENV}/systemd/lib/systemd/system/ ; \
  #     # mkdir -p _build/${MIX_ENV}/deploy/bin ; \
  #     # cp /app/_build/${MIX_ENV}/deploy/bin/* _build/${MIX_ENV}/deploy/bin/ ; \
  #     # chmod +x /app/_build/${MIX_ENV}/deploy/bin/* ; \
  #     mkdir -p bin ; \
  #     cp /app/bin/* ./bin/ ; \
  #     chmod +x ./bin/* ; \
  #     cp /app/_build/${MIX_ENV}/${RELEASE}-*.tar.gz _build/${MIX_ENV}/ ; \
  #     zip -r /ansible.zip . ; \
  #     rm -rf /ansible/*
  
  
  # Create staging image for files which are copied into final prod image
  FROM ${INSTALL_BASE_IMAGE_NAME}:${INSTALL_BASE_IMAGE_TAG} AS prod-install
  ARG LANG
  
  # https://groups.google.com/g/cloudlab-users/c/Re6Jg7oya68?pli=1
  
  ARG RUNTIME_PACKAGES
  
  RUN --mount=type=cache,id=dnf-cache,target=/var/cache/dnf,sharing=locked \
      set -exu ; \
      # dnf makecache --refresh ; \
      dnf upgrade -y ; \
      dnf install -y --nodocs --allowerasing \
          ca-certificates \
          curl \
          gnupg-agent \
          # software-properties-common \
          # glibc-langpack -en \
          glibc-minimal-langpack \
          gpg \
          unzip \
          # jq \
          lsb-release \
          # Needed by Erlang VM
          # Additional libs
          libstdc++6 \
          libgcc-s1 \
          # locales \
          $RUNTIME_PACKAGES
      # dnf clean all
      # dnf clean all ; rm -rf /var/cache/yum
  
  # Creating minimal CentOS docker image from scratch
  # https://gist.github.com/silveraid/e6bdf78441c731a30a66fc6adca6f4b5
  # https://www.mankier.com/8/microdnf
  # https://git.rockylinux.org/rocky/images/-/blob/main/base/scripts/build-container-rootfs.sh
  
  
  # Create base image for prod with everything but the code release
  FROM ${PROD_BASE_IMAGE_NAME}:${PROD_BASE_IMAGE_TAG} AS prod-base
  ARG APP_NAME
  ARG APP_DIR
  ARG APP_GROUP
  ARG APP_GROUP_ID
  ARG APP_USER
  ARG APP_USER_ID
  
  # Create OS user and group to run app under
  RUN if ! grep -q "$APP_USER" /etc/passwd; \
      then groupadd -g "$APP_GROUP_ID" "$APP_GROUP" && \
      useradd -l -u "$APP_USER_ID" -g "$APP_GROUP" -d "$APP_DIR" -s /usr/sbin/nologin "$APP_USER" && \
      rm -f /var/log/lastlog && rm -f /var/log/faillog; fi
  
  ARG RUNTIME_PACKAGES
  
  RUN --mount=type=cache,id=dnf-cache,target=/var/cache/dnf,sharing=locked \
      set -exu ; \
      # dnf makecache --refresh ; \
      dnf upgrade -y ; \
      dnf install -y --nodocs --allowerasing \
          # Enable the app to make outbound SSL calls.
          ca-certificates \
          # Run health checks and get ECS metadata
          curl \
          # glibc-langpack -en \
          glibc-minimal-langpack \
          jq \
          # useradd and groupadd
          shadow-utils \
          wget \
          $RUNTIME_PACKAGES
      # dnf clean all
      # dnf clean all ; rm -rf /var/cache/dnf
  
  ARG LANG
  
  # Set environment vars that do not change. Secrets like SECRET_KEY_BASE and
  # environment-specific config such as DATABASE_URL are set at runtime.
  ENV HOME=$APP_DIR \
      LANG=$LANG \
      # Writable tmp directory for releases
      RELEASE_TMP="/run/${APP_NAME}"
  
  RUN set -exu ; \
      # Create app dirs
      mkdir -p "/run/${APP_NAME}" ; \
      # mkdir -p "/etc/foo" ; \
      # mkdir -p "/var/lib/foo" ; \
      # Make dirs writable by app
      chown -R "${APP_USER}:${APP_GROUP}" \
          # Needed for RELEASE_TMP
          "/run/${APP_NAME}"
          # "/var/lib/foo"
  
  
  # Create final prod image which gets deployed
  FROM prod-base AS prod
  ARG APP_DIR
  ARG APP_USER
  ARG APP_GROUP
  
  # This could be put in a separate target, but it's faster to do it from prod test
  
  # Copy CodeDeploy revision into prod image for publishing later
  # COPY --from=prod-release --chown="$APP_USER:$APP_GROUP" /revision.zip /revision.zip
  
  # Copy Ansible release into prod image for publishing later
  # COPY --from=prod-release --chown="$APP_USER:$APP_GROUP" /ansible.zip /ansible.zip
  
  # USER $APP_USER:$APP_GROUP
  
  # Setting WORKDIR after USER makes directory be owned by the user.
  # Setting it before makes it owned by root, which is more secure.
  WORKDIR $APP_DIR
  
  # When using a startup script, copy to /app/bin
  # COPY --link bi[n] ./bin
  
  USER $APP_USER:$APP_GROUP
  
  # Chown files while copying. Running "RUN chown -R app:app /app"
  # adds an extra layer which is about 10Mb, a huge difference if the
  # app image is around 20Mb.
  
  # TODO: For more security, change specific files to have group read/execute
  # permissions while leaving them owned by root
  
  # When using a startup script, unpack release under "/app/current" dir
  # WORKDIR $APP_DIR/current
  
  ARG MIX_ENV
  ARG RELEASE
  
  COPY --from=prod-release --chown="$APP_USER:$APP_GROUP" "/app/_build/${MIX_ENV}/rel/${RELEASE}" ./
  
  ARG APP_PORT
  EXPOSE $APP_PORT
  
  # Erlang EPMD port
  EXPOSE 4369
  
  # Intra-Erlang communication ports
  EXPOSE 9000-9010
  
  # :erpc default port
  EXPOSE 9090
  
  # "bin" is the directory under the unpacked release, and "prod" is the name
  # of the release top level script, which should match the RELEASE var.
  # ENTRYPOINT ["bin/prod"]
  
  # Run under init to avoid zombie processes
  # https://github.com/krallin/tini
  # ENTRYPOINT ["/sbin/tini", "--", "bin/prod"]
  
  # Wrapper script which runs e.g. migrations before starting
  ENTRYPOINT ["bin/start-docker"]
  
  # Run app in foreground
  # CMD ["start"]
  
  
  # Dev image which mounts code from local filesystem
  FROM build-os-deps AS dev
  ARG LANG
  
  ARG APP_DIR
  ARG APP_GROUP
  ARG APP_NAME
  ARG APP_USER
  
  # Set environment vars used by the app
  ENV HOME=$APP_DIR \
      LANG=$LANG
  
  RUN set -exu ; \
      # Create app dirs
      mkdir -p "/run/${APP_NAME}" ; \
      # mkdir -p "/etc/foo" ; \
      # mkdir -p "/var/lib/foo" ; \
      # Make dirs writable by app
      chown -R "${APP_USER}:${APP_GROUP}" \
          # Needed for RELEASE_TMP
          "/run/${APP_NAME}"
         # "/var/lib/foo"
  
  ARG DEV_PACKAGES
  
  RUN --mount=type=cache,id=dnf-cache,target=/var/cache/dnf,sharing=locked \
      set -exu ; \
      dnf install -y --nodocs --allowerasing \
          inotify-tools \
          openssh-clients \
          sudo \
          # for chsh
          util-linux-user \
          $DEV_PACKAGES
      # dnf clean all
  
  RUN chsh --shell /bin/bash "$APP_USER"
  
  
  # Copy build artifacts to host
  FROM scratch AS artifacts
  ARG MIX_ENV
  ARG RELEASE
  
  # COPY --from=prod-release "/app/_build/${MIX_ENV}/rel/${RELEASE}" /release
  # COPY --from=prod-release /app/_build/${MIX_ENV}/${RELEASE}-*.tar.gz /release
  # COPY --from=prod-release "/app/_build/${MIX_ENV}/systemd/lib/systemd/system" /systemd
  COPY --from=prod-release /app/priv/static /static
  
  
  # Default target
  FROM prod
  