Dockerfile.pip-warmer

# syntax=docker/dockerfile:1.6
ARG ALPINE_TAG=3.19
FROM alpine:${ALPINE_TAG}

ARG ALPINE_BRANCH=v3.19
ARG CACHE_ID=apk-cache-alpine319
ARG PIP_CACHE_ID=pip-cache-alpine319
ARG PIP_PKGS="fastapi uvicorn[standard] jinja2"

RUN --mount=type=cache,id=${CACHE_ID},sharing=locked,target=/var/cache/apk \
    printf '%s\n' \
      "https://dl-cdn.alpinelinux.org/alpine/${ALPINE_BRANCH}/main" \
      "https://dl-cdn.alpinelinux.org/alpine/${ALPINE_BRANCH}/community" \
      > /etc/apk/repositories \
 && apk add --cache-dir /var/cache/apk python3 py3-pip

# Warm pip wheels into a persistent BuildKit cache (no need to keep the image)
# ENV PIP_DISABLE_PIP_VERSION_CHECK=1
# RUN --mount=type=cache,id=${PIP_CACHE_ID},target=/root/.cache/pip \
#     python3 -m pip install -U pip \
#  && python3 -m pip download --dest /root/.cache/pip/wheels ${PIP_PKGS}