music-curator/Dockerfile

# Alpine because there is nothing to compile and nothing to link against: the
# application is one Python module with no dependencies outside the standard
# library, so the base image is almost the whole image.
FROM python:3.13-alpine AS runtime

ENV PYTHONUNBUFFERED=1

WORKDIR /app
COPY pyproject.toml README.md ./
COPY music_curator.py ./
RUN pip install --no-cache-dir . \
    && rm -rf build music_curator.egg-info

# The store lives here. Mount a volume over it, or the history is re-downloaded
# from Last.fm every time the container is recreated.
ENV MUSIC_CURATOR_DB=/data/curator.db
VOLUME ["/data"]

# Runs as root by default so a bind-mounted dataset of any ownership is
# writable. Override with `user:` in compose to run as the dataset's owner.
ENTRYPOINT ["music-curator"]

# Test stage: build it with `--target test`; a failing test fails the build.
# The suite talks to a fake transport, never to Last.fm, so it needs no
# credentials and no network. The published image is the `runtime` stage above
# and carries none of this.
FROM runtime AS test

RUN pip install --no-cache-dir pytest
COPY pytest.ini ./
# The host-side tools are not part of the runtime image, but their tests are
# part of the suite, so they have to be present for it.
COPY tools ./tools
COPY tests ./tests
RUN python -m pytest