moved to a pythonic entry point

{{cookiecutter.project_slug}}/compose/django/Dockerfile

@@ -10,11 +10,11 @@ COPY ./requirements /requirements
 RUN pip install --no-cache-dir -r /requirements/production.txt \
     && rm -rf /requirements
 
-COPY ./compose/django/gunicorn.sh ./compose/django/entrypoint.sh /
+COPY ./compose/django/gunicorn.sh ./compose/django/entrypoint.py /
-RUN sed -i 's/\r//' /entrypoint.sh \
+RUN sed -i 's/\r//' /entrypoint.py \
     && sed -i 's/\r//' /gunicorn.sh \
-    && chmod +x /entrypoint.sh \
+    && chmod +x /entrypoint.py \
-    && chown django /entrypoint.sh \
+    && chown django /entrypoint.py \
     && chmod +x /gunicorn.sh \
     && chown django /gunicorn.sh
 
@@ -26,4 +26,4 @@ USER django
 
 WORKDIR /app
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/entrypoint.py"]

{{cookiecutter.project_slug}}/compose/django/Dockerfile-dev

@@ -5,9 +5,9 @@ ENV PYTHONUNBUFFERED 1
 COPY ./requirements /requirements
 RUN pip install -r /requirements/local.txt
 
-COPY ./compose/django/entrypoint.sh /entrypoint.sh
+COPY ./compose/django/entrypoint.py /entrypoint.py
-RUN sed -i 's/\r//' /entrypoint.sh
+RUN sed -i 's/\r//' /entrypoint.py
-RUN chmod +x /entrypoint.sh
+RUN chmod +x /entrypoint.py
 
 COPY ./compose/django/start-dev.sh /start-dev.sh
 RUN sed -i 's/\r//' /start-dev.sh
@@ -15,4 +15,4 @@ RUN chmod +x /start-dev.sh
 
 WORKDIR /app
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/entrypoint.py"]

{{cookiecutter.project_slug}}/compose/django/entrypoint.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python
+
+"""
+# This entrypoint is used to play nicely with the current cookiecutter configuration.
+# Since docker-compose relies heavily on environment variables itself for configuration, we'd have to define multiple
+# environment variables just to support cookiecutter out of the box. That makes no sense, so this little entrypoint
+# does all this for us.
+"""
+
+from __future__ import print_function
+import os
+import sys
+import psycopg2
+import time
+
+
+def exports(list=None):
+    """Useful environment variables
+    :list: TODO
+    """
+    os.environ['REDIS_URL'] = 'redis://redis:6379'
+    os.environ['CELERY_BROKER_URL'] = os.environ['REDIS_URL'] + '/0'
+
+def pingpost():
+    """
+    This is the function that actually trys to connect
+    to postgres
+
+    """
+    try:
+		if os.environ['POSTGRES_USER']:
+            pg_user = os.environ['POSTGRES_USER']
+        else:
+            os.environ['POSTGRES_USER'] = pg_user = 'postgres'
+        pg_pass = os.environ['POSTGRES_PASSWORD']
+
+		DATABASE_URL='postgres://{username}:{password}@postgres:5432/{username}'
+        DATABASE_URL = DATABASE_URL.format(username=pg_user, password=pg_pass),
+        os.environ['DATABASE_URL'] = DATABASE_URL
+
+        conn = psycopg2.connect(DATABASE_URL, connect_timeout=3)
+
+    except psycopg2.OperationalError as error:
+        print(error)
+        return False
+    return True
+
+def main(arguments):
+    """
+    call exports
+    and check to see if postgres is ready
+    """
+    exports()
+
+    while True:
+        if pingpost():
+            break
+            print('Postgres is unavailable - sleeping')
+            time.sleep(1)
+
+    import subprocess
+    try:
+        hold = subprocess.check_call(arguments)
+    except subprocess.CalledProcessError as cpe:
+        print("something went wrong")
+        raise Exception(cpe)
+
+    print('exiting: ...')
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))

{{cookiecutter.project_slug}}/compose/django/entrypoint.sh

@@ -1,39 +0,0 @@
-#!/bin/bash
-set -e
-cmd="$@"
-
-# This entrypoint is used to play nicely with the current cookiecutter configuration.
-# Since docker-compose relies heavily on environment variables itself for configuration, we'd have to define multiple
-# environment variables just to support cookiecutter out of the box. That makes no sense, so this little entrypoint
-# does all this for us.
-export REDIS_URL=redis://redis:6379
-
-# the official postgres image uses 'postgres' as default user if not set explictly.
-if [ -z "$POSTGRES_USER" ]; then
-    export POSTGRES_USER=postgres
-fi
-
-export DATABASE_URL=postgres://$POSTGRES_USER:$POSTGRES_PASSWORD@postgres:5432/$POSTGRES_USER
-{% if cookiecutter.use_celery == 'y' %}
-export CELERY_BROKER_URL=$REDIS_URL/0
-{% endif %}
-
-function postgres_ready(){
-python << END
-import sys
-import psycopg2
-try:
-    conn = psycopg2.connect(dbname="$POSTGRES_USER", user="$POSTGRES_USER", password="$POSTGRES_PASSWORD", host="postgres")
-except psycopg2.OperationalError:
-    sys.exit(-1)
-sys.exit(0)
-END
-}
-
-until postgres_ready; do
-  >&2 echo "Postgres is unavailable - sleeping"
-  sleep 1
-done
-
->&2 echo "Postgres is up - continuing..."
-exec $cmd