steps:
  build:
    image: alpine
    when:
      branch: [ master ]
      event: [push, pull_request]
    commands: |
      apk add --no-cache shellcheck

      find ./* -type f -name build -o -name post-\* -o -name pre-\* | sed 's/[^[:alnum:]]/\\\\&/g' | xargs shellcheck