Merge pull request #599 from powerapi-ng/build/container-image-install-method

build(Dockerfile): Enable build-time selection of powerapi install source

Author: gfieni

Dockerfile

@@ -1,12 +1,34 @@
-FROM python:3-slim@sha256:60248ff36cf701fcb6729c085a879d81e4603f7f507345742dc82d4b38d16784
+# ---- Image configuration flags:
+ARG POWERAPI_INSTALL_METHOD="pypi"
+ARG POWERAPI_COMPONENTS="everything"
+ARG POWERAPI_VERSION=""
+
+# ---- Base stage (common setup):
+FROM python:3-slim@sha256:60248ff36cf701fcb6729c085a879d81e4603f7f507345742dc82d4b38d16784 AS base
 
 RUN useradd -m -s /bin/bash powerapi
 WORKDIR /home/powerapi
 
 RUN python -m venv --clear /opt/powerapi-venv
-ENV VIRTUAL_ENV=/opt/powerapi-venv PATH="/opt/powerapi-venv/bin:$PATH"
+ENV VIRTUAL_ENV=/opt/powerapi-venv PATH="/opt/powerapi-venv/bin:${PATH}"
+
+# ---- Install PowerAPI package from PyPI.org:
+FROM base AS pypi
+
+ARG POWERAPI_COMPONENTS
+ARG POWERAPI_VERSION
+
+RUN python -m pip install --no-cache-dir "powerapi[${POWERAPI_COMPONENTS}]${POWERAPI_VERSION:+==$POWERAPI_VERSION}"
+
+# ---- Install PowerAPI package from local sources (editable install):
+FROM base AS local
+
+ARG POWERAPI_COMPONENTS
 
 COPY --chown=powerapi . /tmp/powerapi
-RUN pip install --no-cache-dir "/tmp/powerapi[everything]" && rm -r /tmp/powerapi
+RUN python -m pip install --no-cache-dir "/tmp/powerapi[${POWERAPI_COMPONENTS}]" && rm -r /tmp/powerapi
+
+# ---- Final stage:
+FROM ${POWERAPI_INSTALL_METHOD} AS final
 
-ENTRYPOINT ["sh", "-c", "echo 'This container image should be used as a base image for a formula and is not intended to be run directly.' >&2; exit 1"]
+ENTRYPOINT ["sh", "-c", "echo 'This container image is intended to be used as a base and should not be run directly.' >&2; exit 1"]