Improve Docker installation (#152)

docker-entrypoint.sh

@@ -1,53 +1,29 @@
-#!/bin/bash
+#!/bin/sh
 
-# This file serves 3 use cases:
-# 1: if the env variable UPDATE is 1, db is prepared
-# 2: if a command was supplied, it is executed
-# 3: otherwise, check env variable ENVIRONMENT and launch server
-
-# Exit immediately if a command exits with a non-zero status.
+# Exit immediately if a command exits with a non-zero status
 set -e
 
-# Check environment variables
-/bin/bash ./check-env.sh
-
-# Remove a potentially pre-existing server.pid for Rails.
+# Remove a potentially pre-existing server.pid for Rails
 rm -f $APP_ROOT/tmp/pids/server.pid
 
-# Use case 1
-if [ "$UPDATE" = 1 ]; then
-  # Create database, load schema, run migrations and seed data in an idempotent way.
-  echo "Preparing database..."
-  db_version=$(bundle exec rake db:version)
-  echo "$db_version"
-  if [ "$db_version" = "Current version: 0" ]; then
-    bundle exec rake db:create
-    bundle exec rake db:schema:load
-    bundle exec rake db:migrate
-    bundle exec rake db:seed
-  else
-    bundle exec rake db:migrate
-  fi
-  echo "Database prepared."
+# Prepare database
+echo "Preparing database..."
 
-  exit 0
+# Wait for database
+until bundle exec rake db:version; do
+  >&2 echo "Waiting for postgres to initialize..."
+  sleep 1
+done
+
+# Update or create database
+db_version=$(bundle exec rake db:version)
+echo "$db_version"
+if [ "$db_version" = "Current version: 0" ]; then
+  bundle exec rake db:create
+  bundle exec rake db:schema:load
+  bundle exec rake db:migrate
+  bundle exec rake db:seed
+else
+  bundle exec rake db:migrate
 fi
-
-# Use case 2
-if [ ! $# -eq 0 ]; then
-  exec "$@"
-  exit 0
-fi
-
-# Use case 3
-echo "Environment is: $ENVIRONMENT"
-export RAILS_ENV="$ENVIRONMENT"
-export NODE_ENV="$ENVIRONMENT"
-if [ $ENVIRONMENT == "development" ]; then
-  # Launch Rails server and webpack-dev-server using Foreman
-  foreman start -p 3000
-else # production
-  # Compile assets and launch server
-  rails assets:precompile
-  rails server -e production
-fi
+echo "Database prepared."