Build Python and JavaScript dependencies in separate Docker stages

.dockerignore

@@ -1,6 +1,10 @@
 .git
+.github
 .gitignore
 **/__pycache__
 **/*.egg-info
-pip-wheel-metadata
 **/node_modules
+Dockerfile
+makefile
+pip-wheel-metadata
+README.md

Dockerfile

@@ -1,30 +1,58 @@
-FROM python:3.8-slim
+FROM python:3.8.2-alpine3.11 AS poetry
 
 RUN mkdir /src
 WORKDIR /src
 
-RUN apt-get update
-RUN apt-get -y install curl gcc gnupg
-RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
-RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
-RUN apt-get update
-RUN apt-get -y install yarn
+RUN apk update
+RUN apk add build-base libffi-dev openssl-dev
 
-RUN pip install --upgrade pip
+RUN pip install poetry==1.0.5
+ADD pyproject.toml pyproject.toml
+ADD poetry.lock poetry.lock
+RUN poetry export -f requirements.txt -o requirements.txt
 
-ADD requirements.txt requirements.txt
-RUN pip install -r requirements.txt
 
-ADD timeuntil timeuntil
-ADD setup.py setup.py
-RUN pip install -e .
 
-WORKDIR /src/timeuntil/static/js
+FROM python:3.8.2-alpine3.11 AS pip
+
+RUN mkdir /src
+WORKDIR /src
+
+RUN apk update
+RUN apk add build-base libffi-dev openssl-dev
+
+COPY --from=poetry /src/requirements.txt /src/requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+
+
+FROM alpine:3.11.5 AS yarn
+
+RUN mkdir /src
+WORKDIR /src
+
+RUN apk update
+RUN apk add yarn
+
+ADD timeuntil/static/js/package.json package.json
+ADD timeuntil/static/js/yarn.lock yarn.lock
 RUN yarn install
+
+
+
+FROM python:3.8.2-alpine3.11 AS production
+
+RUN mkdir /src
 WORKDIR /src
 
-ENV FLASK_APP timeuntil/app.py
+ADD timeuntil timeuntil
 ADD uwsgi.yaml uwsgi.yaml
+
+COPY --from=pip /usr/local/lib/python3.8/site-packages /usr/local/lib/python3.8/site-packages
+COPY --from=pip /usr/local/bin /usr/local/bin
+COPY --from=yarn /src/node_modules /src/timeuntil/static/js/node_modules
+
+ENV FLASK_APP timeuntil/app.py
 EXPOSE 5000
 
 CMD uwsgi --socket 0.0.0.0:5000 --protocol=http --yaml uwsgi.yaml

README.md

@@ -18,11 +18,3 @@ zone.
 - Activate the virtual environment
 - Install the app via `make install_locally`
 - Launch the app via `make run_locally`
-
-## Development guidelines
-
-The use of Poetry is experimental. There are still some limits when having to
-build a container to run the app. Namely a minimal `setup.py` and a full list
-of requirements are still needed. In particular, before each commit run
-`make update_requirements` which uses Poetry to export the requirements list
-used in the container. This step will be automated via git pre-commit hooks.

makefile

@@ -1,7 +1,3 @@
-update_requirements:
-	poetry export -f requirements.txt -o requirements.txt && \
-	poetry export -f requirements.txt -o test_requirements.txt --dev
-
 install_locally:
 	pip install --upgrade pip && \
 	poetry install && \