Support configuration cache fully & Gradle 9 compatibility

[Vampire]

• I have read the guidelines for submitting issues

⚠️ Is your feature request related to a problem? Please describe

The plugin is not compatible with Gradle 9.
For example it accesses Task#project at execution time, which was deprecated and will fail with Gradle 9.

Maybe in the course of fixing this, supporting the configuration cache could also be reconsidered as it is one of the issues which makes the tasks incompatible right now.
The argument "isn't worth caching as it changes the versions file and thus invalidates the cache" is only true if it actually changes the file. If you use it to check for updates and no updates are available, the CC could be reused. :-)
And finally, since Gradle 8.1 the CC was promoted to stable.

💡 Describe the solution you'd like

Plugin compatible with Gradle 9 and optimally configuration cache

🤚 Do you want to develop this feature yourself?

• Yes
• No

[LouisCAD]

Configuration cache support was fully implemented for the refreshVersions task.
It's in the latest snapshot and will make it into a release next week.

Besides other tasks that are not supporting configuration cache yet, please let me know if you spot any other Gradle 9 compatibility issues.

[hektorKS]

Gradle 9.0.0 is out and not working with refreshVersions unfortunately.

I wonder if support for this project was dropped @jmfayard @LouisCAD ?

./gradlew help --scan --stacktrace
Configuration on demand is an incubating feature.
Parallel Configuration Cache is an incubating feature.
Calculating task graph as no cached configuration is available for tasks: help
Type-safe project accessors is an incubating feature.

FAILURE: Build failed with an exception.

* What went wrong:
org/gradle/api/internal/artifacts/dependencies/DefaultClientModule
> org.gradle.api.internal.artifacts.dependencies.DefaultClientModule

* Try:
> Run with --info or --debug option to get more log output.
> Get more help at https://help.gradle.org.

* Exception is:
java.lang.NoClassDefFoundError: org/gradle/api/internal/artifacts/dependencies/DefaultClientModule
        at de.fayard.refreshVersions.core.RefreshVersionsCoreSetup.pluginIdToDependency(RefreshVersionsCoreSetup.kt:252)
        at de.fayard.refreshVersions.core.RefreshVersionsCoreSetup$setupPluginsVersionsResolution$1$1.execute(RefreshVersionsCoreSetup.kt:215)
        at de.fayard.refreshVersions.core.RefreshVersionsCoreSetup$setupPluginsVersionsResolution$1$1.execute(RefreshVersionsCoreSetup.kt:194)
        at org.gradle.internal.ImmutableActionSet$SingletonSet.execute(ImmutableActionSet.java:226)
        at org.gradle.internal.MutableActionSet.execute(MutableActionSet.java:41)
        at org.gradle.plugin.management.internal.DefaultPluginResolutionStrategy.applyTo(DefaultPluginResolutionStrategy.java:62)
        at org.gradle.plugin.use.internal.DefaultPluginRequestApplicator.applyPlugins(DefaultPluginRequestApplicator.java:100)
        at org.gradle.kotlin.dsl.provider.PluginRequestsHandler.handle(PluginRequestsHandler.kt:45)
        at org.gradle.kotlin.dsl.provider.StandardKotlinScriptEvaluator$InterpreterHost.applyPluginsTo(KotlinScriptEvaluator.kt:242)
        at org.gradle.kotlin.dsl.execution.Interpreter$ProgramHost.applyPluginsTo(Interpreter.kt:387)
        at Program.execute(Unknown Source)

[LouisCAD]

Hello!

It's currently in slow maintenance mode because of different priorities.

I saw a PR attempting to fix Gradle 9.0 support, I'll look at it in the coming days.