Dockerfile.3.6.3-alpine-onbuild

FROM python:3.6.3-alpine3.6

MAINTAINER Dmitriy Lekomtsev <lekomtsev@gmail.com>

COPY ./prepare_alpine.sh /prepare_alpine.sh
# Prepare script for installing runtime and buildtime dependencies of child images
COPY ./pip_install.sh /pip_install.sh
# Script for installing packages via pip only if requirements.txt exists.
COPY ./postinstall_alpine.sh /postinstall_alpine.sh

RUN   apk --no-cache add curl \
# Sadly curl needed to download tini executable
  &&  mkdir /app/ \
  &&  pip install pip setuptools wheel \
# Updating Python install system. Not mandatory I will always do this at start
  &&  pip install shyaml \
# Installing YAML command line parser
  &&  curl -L https://github.com/krallin/tini/releases/download/v0.9.0/tini-static -o /usr/local/bin/tini \
  &&  chmod +x /usr/local/bin/tini \
# Installing minimal init system for container
# as defence from https://blog.phusion.nl/2015/01/20/docker-and-the-pid-1-zombie-reaping-problem/
  &&  chmod +x /prepare_alpine.sh \
  &&  chmod +x /pip_install.sh \
  &&  chmod +x /postinstall_alpine.sh

WORKDIR /app

ENTRYPOINT ["tini", "--"]
CMD ["python"]

ONBUILD COPY ./app.yaml /app/app.yaml
ONBUILD COPY ./requirements.txt /app/requirements.txt
ONBUILD RUN /prepare_alpine.sh \
  && /pip_install.sh \
  && /postinstall_alpine.sh
  # app.yaml contains two keys 'runtime' and 'buildtime' under dependencies.alpine key.
  # 'runtime' enlist OS packages contains libraries needed by Python packages
  # to work. For example, lxml Python package uses libxml2 and libxslt libraries
  # at runtime.
  # 'buildtime' enlist OS packages contains header files needed by Python packages
  # while pip installing them. For example, lxml Python package uses lixml2-dev
  # and libxslt-dev during its installation process. This list does not include
  # standard OS packages needed at build time like gcc or cmake.
ONBUILD COPY . /app/