Several change to mailman-web image.

- Download source code as zip from gitlab instead of git+https because speed.
- Check if the $DATABASE_URL is not defined, use a default sqlite database.
- Use dj-database-url package to set database in django settings using
  DATABASE_URL environment variable.
- Use UWSGI_LOG_URL as the URL for UWSGI logging and set it to a default value
  if it has not been defined.

web/assets/run.sh

@@ -1,14 +1,47 @@
 #! /bin/bash
 set -e
 
-# Check if the database is available yet. Do not start the container before the
-# postgresql boots up.
-until psql $DATABASE_URL -c '\l'; do
-  >&2 echo "Postgres is unavailable - sleeping"
-  sleep 1
-done
+# Check if $DATABASE_URL is defined, if not, use a standard sqlite database.
+#
+# If the $DATABASE_URL is defined and is postgres, check if it is available
+# yet. Do not start the container before the postgresql boots up.
+#
+# If the $DATABASE_URL is defined and is mysql, check if the database is
+# available before the container boots up.
+#
+# TODO: Check the database type and detect if it is up based on that. For now,
+# assume that postgres is being used if DATABASE_URL is defined.
+if [[ -z "$DATABASES_URL" ]]; then
+	echo "$DATABASE_URL is not defined. Using sqlite database..."
+	DATABASE_URL="sqlite:///opt/mailman-web-data/database/mailmanweb.db"
+	DATABASE_TYPE='sqlite'
+	if [[ ! -e "/opt/mailman-web-data/database" ]]; then
+		mkdir -p /opt/mailman-web-data/database/
+	fi
+else
+	DATABASE_TYPE='postgres'
+	wait_for_postgres()
+fi
 
->&2 echo "Postgres is up - continuing"
+function wait_for_postgres {
+	# Check if the postgres database is up and accepting connections before
+	# moving forward.
+	# TODO: Use python's psycopg2 module to do this in python instead of
+	# installing postgres-client in the image.
+	until psql $DATABASE_URL -c '\l'; do
+		>&2 echo "Postgres is unavailable - sleeping"
+		sleep 1
+	done
+	>&2 echo "Postgres is up - continuing"
+}
+
+function check_or_create {
+	# Check if the path exists, if not, create the directory.
+	if [[ ! -e dir ]]; then
+		echo "$1 does not exist, creating ..."
+		mkdir "$1"
+	fi
+}
 
 # Check if we are in the correct directory before running commands.
 if [[ ! $(pwd) == '/opt/mailman-web' ]]; then
@@ -19,11 +52,15 @@ fi
 # Check if the logs directory is setup.
 
 if [[ ! -e /opt/mailman-web-data/logs/mailmanweb.log ]]; then
-	echo "Create log file..."
+	echo "Creating log file for mailman web"
 	mkdir -p /opt/mailman-web-data/logs/
 	touch /opt/mailman-web-data/logs/mailmanweb.log
 fi
 
+if [[ ! -e /opt/mailman-web-data/logs/mailmanweb.log ]]; then
+	echo "Creating log file for uwsgi.."
+	touch /opt/mailman-web-data/logs/uwsgi.log
+fi
 
 # Check if the settings_local.py file exists, if yes, copy it too.
 if [[ -e /opt/mailman-web-data/settings_local.py ]]; then
@@ -41,5 +78,17 @@ python manage.py collectstatic --noinput
 # this command will upgrade the database.
 python manage.py migrate
 
+# Check if there is a non-standard location for logging defined.
+# It can be changed by $UWSGI_LOG_URL environment variable, which if not set points
+# to /opt/mailman-web/logs/uwsgi.log
+# It can also point to a logging daemon accessible at a URL.
+if [[ -z "$UWSGI_LOG_URL" ]]; then
+	echo "No $UWSGI_LOG_URL defined, logging uwsgi to /opt/mailman-web-data/logs/uwsgi.log ..."
+	UWSGI_LOG_URL='/opt/mailman-web-data/logs/uwsgi.log'
+	if [[ ! -e "$UWSGI_LOG_URL" ]]; then
+		touch "$UWSGI_LOG_URL"
+	fi
+fi
+
 # Run the web server.
-uwsgi --http-auto-chunked --http-keepalive --static-map /static/=/opt/mailman-web-data/static/
+uwsgi --http-auto-chunked --http-keepalive --logto "$UWSGI_LOG_URL"