docker!

docker-compose.yml

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+# This docker-compose setup is intented for development, testing, and CI purposes.
+# -- Make changes with extreme caution!
+
+# Note: CircleCI Docker runners don't support volumes.
+
+version: "3.4"
+
+# Services are meant to be interchangeble between running them locally or
+# inside a container. That is why all of them export their server port to the host.
+
+# Images that are built here are the same used in production.
+services:
+  core:
+    image: kennethreitz/bake:core
+    build:
+      context: .
+      dockerfile: ./docker/core.Dockerfile
+
+  bake:
+    image: kennethreitz/bake:${DOCKER_RELEASE:-latest}
+    build:
+      context: .
+      dockerfile: ./docker/bake.Dockerfile
+    depends_on:
+      - core
+    volumes:
+      - ./Bakefile:/app/Bakefile
+      - .:/app

docker/bake.Dockerfile

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+FROM kennethreitz/bake:core
+
+ENV BAKEFILE_PATH /app/Bakefile
+
+# -- Install Shellcheck.
+RUN set -ex && \
+    apt-get install shellcheck -y -qq && \
+    apt-get clean -y -qq && \
+    apt-get autoclean -y -qq
+
+# -- Install latest Bake.
+RUN set -ex && \
+    pip3 install bake-cli --upgrade --quiet > /dev/null
+
+# -- Really slim down that image.
+RUN set -ex && \
+    rm -fr /var/lib/apt/lists
+
+# -- Copy Bakefile of depending Dockerfiles.
+ONBUILD COPY ./Bakefile /app/Bakefile
+
+# -- Copy the application over.
+ONBUILD COPY . /app
+
+ENTRYPOINT [ "bake" ]

docker/core.Dockerfile

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+FROM ubuntu:19.04
+
+# Tell Ubuntu to not prompt during apt installs.
+ENV DEBIAN_FRONTEND 'noninteractive'
+
+# -- Setup mirrors, for faster downloads (main sources can be *very* slow sometimes).
+COPY ./docker/scripts/use-mirrors.sh /opt/use-mirrors.sh
+RUN set -ex && \
+    /opt/use-mirrors.sh && \
+    rm -fr /opt/use-mirrors.sh
+
+# -- System dependencies + common utilities.
+RUN set -ex && \
+    apt-get update -qq && \
+    apt-get upgrade -y -qq && \
+    apt-get install curl python3 python3-distutils -y -qq >/dev/null && \
+    apt-get clean -y -qq && \
+    apt-get autoclean -y -qq
+
+# -- Install pip.
+RUN set -ex && curl -s --retry 3 https://bootstrap.pypa.io/get-pip.py > /tmp/get-pip.py && \
+    python3 /tmp/get-pip.py > /dev/null && rm -fr /tmp/get-pip.py
+
+# -- Install hconfig.
+RUN set -ex && \
+    pip3 install pipenv --quiet --no-cache 2>/dev/null
+
+# -- Clean up.
+RUN set -ex && \
+    apt-get clean -y -qq && apt-get autoremove -y -qq && apt-get autoclean -y -qq
+
+# -- Home directory.
+RUN set -ex && \
+    mkdir /app
+
+WORKDIR /app
+
+ENTRYPOINT [ "bash" ]

docker/scripts/use-mirrors.sh

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+#!/usr/bin/env bash
+
+SOURCES_LIST='/etc/apt/sources.list'
+PREVIOUS_SOURCES=$(cat $SOURCES_LIST)
+
+perl -pe '/(http|https):\/\/(.*?)(\/|$)/ && s/$2/mirror.math.princeton.edu\/pub\//g' <<< "$PREVIOUS_SOURCES" > "$SOURCES_LIST"