Gradle Configuration Cache Support

[mpern]

Configuration Cache

• Remove HybrisPluginExtension.platform - it's stateful and fundamentally incompatible with configuration cache
  • ValueSource as potential workaround?
• Ensure reading of build.number is properly declared, otherwise platform unpack is broken
• Check usage of mpern.sap.commerce.build.util.Version across the code base
  • all tasks that require the current platform version must properly define it as Task Input
    • maybe one (internal) task to read it and provide an @Output with the version? 🤔
    • or provide a custom ValueSource Instead?
  • a custom serialization strategy for Version might be necessary to properly store it in build cache (see also Integrity Checks, Java Object Serialization)
  • Plan B: only use it at execution time, so task configuration only dependsd on e.g. Strings or other primitives.
• Verify/double-check CCV2.manifiest property if it is correctly serialized/desrialized to cache and even more importantly, properly invalidated if the file changes
  • most likely needs another internal tas that declares the file read and provides a manifest @output and updates the CCv2 extension l
  • open question: invalidate cached extension how?
  • or provide a custom ValueSource Instead?

[mpern]

https://docs.gradle.org/current/userguide/configuration_cache_requirements.html#config_cache:requirements:task_extensions - ouch...

https://docs.gradle.org/current/userguide/configuration_cache_requirements.html#config_cache:requirements:external_processe

https://docs.gradle.org/current/userguide/configuration_cache_requirements.html#config_cache:requirements:undeclared_file_read