docs/script/release-heroku

#!/usr/bin/env bash

# [start-readme]
#
# Light Bash wrapper for the Heroku release command, which sometimes fails
# unexpectedly in staging environments when a Node installation is missing
#
# [end-readme]

# Check for node but don't fail immediately if it's not present
./script/check-for-node
EXIT_STATUS=$?

# If node is missing...
if [[ "$EXIT_STATUS" -ne "0" ]]; then
  # Fail hard if this is our Heroku production app or if Redis is configured
  if [[ "$HEROKU_PRODUCTION_APP" == "true" || -n "$REDIS_URL" ]]; then
    echo "Error: cannot execute the release script without Node.js, which is fatal."
    echo "Exiting..."
    exit $EXIT_STATUS
  # Otherwise succeed with only a warning
  else
    echo "Warning: although Node.js is missing, it is non-critical."
    echo "Exiting..."
    exit 0
  fi
else
  # Execute the release script and exit with its status
  node script/purge-redis-pages.js
  exit $?
fi