Puma sanity check, for CI / Docker builds

puma_sanity_check.sh

#!/bin/bash
set -e

# When running on a local machine, we need to kill the Spring loader.
if [ -f .env ]; then spring stop; fi

# Ensures that the Rails app can boot and pass a simple health check.
export RAILS_ENV=production
export PORT=4123
export DATABASE_URL=postgresql:does_not_exist

PUMA_PID_FILE="tmp/puma.pid"
HEALTH_CHECK_PATH="localhost:${PORT}/health/site"
echo "Starting Puma..."
puma -C config/puma.rb --pidfile "$PUMA_PID_FILE" -d
sleep 0.5

printf "GET $HEALTH_CHECK_PATH: "
RESPONSE=$(curl -s "$HEALTH_CHECK_PATH")
echo "$RESPONSE"
if [ "$RESPONSE" != "success" ]; then
  echo "Health check failed!"
fi

if [ -f "$PUMA_PID_FILE" ]; then
  PUMA_PID=$(cat "$PUMA_PID_FILE")
  if [ -z "$PUMA_PID" ]; then
    echo "$PUMA_PID_FILE was empty. Please manually kill puma."
  fi
else
  echo "Could not find PID file at $PUMA_PID_FILE. Please manually kill puma."
fi
if [ -z "$PUMA_PID" ]; then exit 1; fi
echo "Shutting down Puma ($PUMA_PID)..."
kill -HUP "$PUMA_PID"

if [ "$RESPONSE" != "success" ]; then exit 1; fi

if [ -f .env ]; then spring stop; fi