content: # Build app
  # Deploy using Alpine
  
  ARG BASE_OS=alpine
  
  # Specify versions of Erlang, Elixir, and base OS.
  # Choose a combination supported by https://hub.docker.com/r/hexpm/elixir/tags
  
  ARG ELIXIR_VER=1.18.3
  ARG OTP_VER=27.3.4
  
  # https://hub.docker.com/_/alpine
  ARG BUILD_OS_VER=3.21.3
  ARG PROD_OS_VER=3.21.3
  
  # By default, packages come from the APK index for the base Alpine image.
  # Package versions are consistent between builds, and we normally upgrade by
  # upgrading the Alpine version.
  ARG APK_UPDATE=":"
  ARG APK_UPGRADE=":"
  
  # If a vulnerability is fixed in packages but not yet released in an Alpine
  # base image, then we can run update/upgrade as part of the build.
  # ARG APK_UPDATE="apk update"
  # ARG APK_UPGRADE="apk upgrade --update-cache -a"
  
  # ARG NODE_VER=16.14.1
  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=${PUBLIC_REGISTRY}hexpm/elixir
  ARG BUILD_BASE_IMAGE_TAG=${ELIXIR_VER}-erlang-${OTP_VER}-${BASE_OS}-${BUILD_OS_VER}
  
  # Base for final prod image
  ARG PROD_BASE_IMAGE_NAME=${PUBLIC_REGISTRY}${BASE_OS}
  ARG PROD_BASE_IMAGE_TAG=$PROD_OS_VER
  
  # 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
  
  # 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
  ARG RUNTIME_PACKAGES=""
  ARG DEV_PACKAGES=""
  
  
  # 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
  # https://wiki.alpinelinux.org/wiki/Setting_up_a_new_user#adduser
  RUN if ! grep -q "$APP_USER" /etc/passwd; \
  then addgroup -g "$APP_GROUP_ID" -S "$APP_GROUP" && \
  adduser -u "$APP_USER_ID" -S "$APP_USER" -G "$APP_GROUP" -h "$APP_DIR"; fi
  
  ARG NODE_VER
  ARG NODE_MAJOR
  ARG RUNTIME_PACKAGES
  
  ARG APK_UPDATE
  ARG APK_UPGRADE
  
  # Install tools and libraries to build binary libraries
  # See https://wiki.alpinelinux.org/wiki/Local_APK_cache for details
  # on the local cache and need for the symlink
  RUN --mount=type=cache,id=apk,target=/var/cache/apk,sharing=locked \
  set -exu ; \
  ln -s /var/cache/apk /etc/apk/cache ; \
  $APK_UPDATE ; $APK_UPGRADE ; \
  apk add --no-progress nodejs npm yarn ; \
  # Get private repos
  apk add --no-progress openssh ; \
  # Build binary libraries
  # apk add --no-progress alpine-sdk ; \
  apk add --no-progress git build-base
  
  # Database command line clients to check if DBs are up when performing integration tests
  # RUN apk add --no-progress postgresql-client mysql-client
  # RUN set -exu ; apk add --no-progress --no-cache curl gnupg --virtual .build-dependencies -- ; \
  #     curl -O https://download.microsoft.com/download/e/4/e/e4e67866-dffd-428c-aac7-8d28ddafb39b/msodbcsql17_17.5.2.1-1_amd64.apk ; \
  #     curl -O https://download.microsoft.com/download/e/4/e/e4e67866-dffd-428c-aac7-8d28ddafb39b/mssql-tools_17.5.2.1-1_amd64.apk ; \
  #     echo y | apk add --allow-untrusted msodbcsql17_17.5.2.1-1_amd64.apk mssql-tools_17.5.2.1-1_amd64.apk ; \
  #     apk del .build-dependencies && rm -f msodbcsql*.sig mssql-tools*.apk
  # ENV PATH="/opt/mssql-tools/bin:${PATH}"
  
  # RUN npm install -g yarn
  
  # RUN set -ex ; corepack enable ; corepack enable npm
  
  
  # 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 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 APP_DIR
  
  WORKDIR $APP_DIR
  
  ARG MIX_ENV
  # COPY --link config ./config
  COPY --link config/config.exs "config/${MIX_ENV}.exs" ./config/
  
  # 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] ./
  
  # 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 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
  # https://wiki.alpinelinux.org/wiki/Setting_up_a_new_user#adduser
  RUN if ! grep -q "$APP_USER" /etc/passwd; \
  then addgroup -g $APP_GROUP_ID -S "$APP_GROUP" && \
  adduser -u $APP_USER_ID -S "$APP_USER" -G "$APP_GROUP" -h "$APP_DIR"; fi
  
  ARG LANG
  
  ARG RUNTIME_PACKAGES
  
  ARG APK_UPDATE
  ARG APK_UPGRADE
  
  # Install Alpine libraries needed at runtime
  # See https://wiki.alpinelinux.org/wiki/Local_APK_cache for details
  # on the local cache and need for the symlink
  RUN --mount=type=cache,id=apk,target=/var/cache/apk,sharing=locked \
  set -ex && \
  ln -s /var/cache/apk /etc/apk/cache && \
  # Upgrading ensures that we get the latest packages, but makes the build nondeterministic
  $APK_UPDATE && $APK_UPGRADE && \
  # apk add --no-progress $RUNTIME_PACKAGES && \
  # apk add --no-progress shared-mime-info tzdata && \
  # https://github.com/krallin/tini
  # apk add --no-progress tini && \
  # Make DNS resolution more reliable
  # https://github.com/sourcegraph/godockerize/commit/5cf4e6d81720f2551e6a7b2b18c63d1460bbbe4e
  # apk add --no-progress bind-tools && \
  # Support outbound TLS connections
  apk add --no-progress ca-certificates && \
  # Allow app to listen on HTTPS
  # May not be needed if HTTPS is handled outside the application, e.g. in load balancer
  apk add --no-progress openssl && \
  # Erlang deps
  apk add --no-progress ncurses-libs libgcc libstdc++
  
  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 \
  # RELEASE=$RELEASE \
  # MIX_ENV=$MIX_ENV \
  # 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"]
  
  
  # 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
  