FeatureFlag plugin does not support Configuration Cache

[ganadist]

Configuration Cache(link) is a new (still experimental) gradle feature to improve build performance since Gradle 6.6

When Configuration Cache is enabled, gradle with Feature Flag plugin shows following error

- Task `:app:generateDebugFeatureFlag` of type `com.linecorp.android.featureflag.FeatureFlagTask`: invocation of 'Task.project' at execution time is unsupported.
  See https://docs.gradle.org/7.4.2/userguide/configuration_cache.html#config_cache:requirements:use_project_during_execution

See the complete report at file:///home/user/MyProject/build/reports/configuration-cache/9i43owv2px0b29dm55tacf45w/5y0bvx624z6zaw9tntypso0nv/configuration-cache-report.html
> Invocation of 'Task.project' by task ':app:generateDebugFeatureFlag' at execution time is unsupported.

org.gradle.api.InvalidUserCodeException: Invocation of 'Task.project' by task ':app:generateDebugFeatureFlag' at execution time is unsupported.
	at org.gradle.configurationcache.initialization.DefaultConfigurationCacheProblemsListener.onTaskExecutionAccessProblem(ConfigurationCacheProblemsListener.kt:74)
	at org.gradle.configurationcache.initialization.DefaultConfigurationCacheProblemsListener.onProjectAccess(ConfigurationCacheProblemsListener.kt:53)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:464)
	at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:446)
	at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:61)
	at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:434)
	at org.gradle.internal.event.DefaultListenerManager$EventBroadcast.dispatch(DefaultListenerManager.java:221)
	at org.gradle.internal.event.DefaultListenerManager$EventBroadcast.dispatch(DefaultListenerManager.java:192)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at com.sun.proxy.$Proxy307.onProjectAccess(Unknown Source)
	at org.gradle.api.internal.AbstractTask.notifyProjectAccess(AbstractTask.java:1053)
	at org.gradle.api.internal.AbstractTask.getProject(AbstractTask.java:237)
	at org.gradle.api.DefaultTask.getProject(DefaultTask.java:59)
	at com.linecorp.android.featureflag.FeatureFlagTask.action(FeatureFlagTask.kt:95)

See also gradle/gradle#13490

[ganadist]

Since gradle 8.0, gradle warns that getProject() is deprecated and this will raise error since Gradle 9.0

Invocation of Task.project at execution time has been deprecated.
This will fail with an error in Gradle 9.0.

Task::featureflag:generateDevelopDebugFeatureFlag	
	at org.gradle.configurationcache.StableConfigurationCacheUnsupportedApiManagerAction$DeprecatedFeaturesListener.onProjectAccess(StableConfigurationCacheUnsupportedApiManagerAction.kt:71)	
	at java.lang.reflect.Method.invoke(Method.java:568)	
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)	
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)	
	at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:460)	
	at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:442)	
	at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:83)	
	at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:69)	
	at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:431)	
	at org.gradle.internal.event.DefaultListenerManager$EventBroadcast.dispatch(DefaultListenerManager.java:219)	
	at org.gradle.internal.event.DefaultListenerManager$EventBroadcast.dispatch(DefaultListenerManager.java:190)	
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)	
	at jdk.proxy1.$Proxy145.onProjectAccess(Unknown Source)	
	at org.gradle.api.internal.AbstractTask.notifyProjectAccess(AbstractTask.java:1049)	
	at org.gradle.api.internal.AbstractTask.getProject(AbstractTask.java:232)	
	at org.gradle.api.DefaultTask.getProject(DefaultTask.java:59)	
	at com.linecorp.android.featureflag.FeatureFlagTask.action(FeatureFlagTask.kt:95)

https://docs.gradle.org/8.0.2/userguide/upgrading_version_7.html#task_project