Experimental PyPy version of Caluma

This uses a separate Dockerfile, so users will still have the choice

Also we need to use a different psycopg2 implementation, as the cPython
version doesn't work with pypy

caluma/settings.py

@@ -1,9 +1,17 @@
 import os
 import re
+import sys
 
 import environ
 from django.conf import global_settings
 
+if hasattr(sys, "pypy_version_info"):  # pragma: no cover
+    # in pypy, override psycopg2 with cffi version
+    from psycopg2cffi import compat
+
+    compat.register()
+
+
 env = environ.Env()
 django_root = environ.Path(__file__) - 2
 

pypy/Dockerfile

@@ -0,0 +1,35 @@
+FROM pypy:3.6
+
+# pypy image still has /usr/bin/python being cpython, we don't want that
+RUN rm /usr/bin/python && cp /usr/local/bin/pypy3 /usr/local/bin/python
+
+WORKDIR /app
+
+RUN wget -q https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh -P /usr/local/bin \
+&& chmod +x /usr/local/bin/wait-for-it.sh \
+&& mkdir -p /app \
+&& useradd -u 901 -r caluma --create-home \
+# all project specific folders need to be accessible by newly created user but also for unknown users (when UID is set manually). Such users are in group root.
+&& chown -R caluma:root /home/caluma \
+&& chmod -R 770 /home/caluma
+
+# needs to be set for users with manually set UID
+ENV HOME=/home/caluma
+
+ENV PYTHONUNBUFFERED=1
+ENV APP_HOME=/app
+ENV DJANGO_SETTINGS_MODULE caluma.settings
+ENV UWSGI_INI /app/uwsgi.ini
+
+ARG REQUIREMENTS=requirements-pypy.txt
+COPY requirements.txt requirements-dev.txt pypy/requirements-pypy.txt $APP_HOME/
+RUN pip install --no-cache-dir --upgrade -r $REQUIREMENTS --disable-pip-version-check
+
+
+USER caluma
+
+COPY . $APP_HOME
+
+EXPOSE 8000
+
+CMD /bin/sh -c "wait-for-it.sh $DATABASE_HOST:${DATABASE_PORT:-5432} -- ./manage.py migrate && uwsgi"

pypy/requirements-pypy.txt

@@ -0,0 +1,2 @@
+-f requirements.txt
+psycopg2cffi==2.8.1