generateLock task throws exception with newer Guava version (affects older versions)

[lptr]

Note: this seems to be fixed already in 11.2.0, but is a problem for 8.8.0, 9.4.1 and 10.1.0.

I'm trying to upgrade the Guava version used by Gradle itself, and after the upgrade this plugin fails to run. The culprit seems to be on line 60 here where the private size field is referred instead of the public size() method:

gradle-dependency-lock-plugin/src/main/groovy/nebula/plugin/dependencylock/utils/ConfigurationFilters.groovy

Lines 55 to 66 in 10a7774

	static boolean safelyHasAResolutionAlternative(Configuration configuration) {
	// 'getResolutionAlternatives' is a method on DefaultConfiguration as of Gradle 6.0
	def method = configuration.metaClass.getMetaMethod('getResolutionAlternatives')
	if (method != null) {
	def alternatives = configuration.getResolutionAlternatives()
	if (alternatives != null && alternatives.size > 0) {
	return true
	}
	}
	return false
	}

The fix should be to simply replace the field reference with the method reference.

Here's the exception I get:

> Task :generateLock FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':generateLock'.
> Exception evaluating property 'size' for com.google.common.collect.RegularImmutableList, Reason: groovy.lang.MissingPropertyException: No such property: size for class: java.lang.String

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
...
Caused by: groovy.lang.MissingPropertyException: Exception evaluating property 'size' for com.google.common.collect.RegularImmutableList, Reason: groovy.lang.MissingPropertyException: No such property: size for class: java.lang.String
	at nebula.plugin.dependencylock.utils.ConfigurationFilters.safelyHasAResolutionAlternative(ConfigurationFilters.groovy:60)
	at nebula.plugin.dependencylock.utils.ConfigurationFilters$safelyHasAResolutionAlternative.call(Unknown Source)
	at nebula.plugin.dependencylock.tasks.GenerateLockTask$_lockableConfigurations_closure3.doCall(GenerateLockTask.groovy:102)
	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 org.gradle.api.specs.internal.ClosureSpec.isSatisfiedBy(ClosureSpec.java:33)
	at org.gradle.api.internal.collections.CollectionFilter.filter(CollectionFilter.java:46)
	at org.gradle.api.internal.collections.FilteredCollection$FilteringIterator.findNext(FilteredCollection.java:122)
	at org.gradle.api.internal.collections.FilteredCollection$FilteringIterator.next(FilteredCollection.java:140)
	at org.gradle.api.internal.DefaultDomainObjectCollection.findAll(DefaultDomainObjectCollection.java:442)
	at org.gradle.api.internal.DefaultNamedDomainObjectSet.findAll(DefaultNamedDomainObjectSet.java:82)
	at org.gradle.api.NamedDomainObjectSet$findAll$0.call(Unknown Source)
	at nebula.plugin.dependencylock.tasks.GenerateLockTask.lockableConfigurations(GenerateLockTask.groovy:100)
	at nebula.plugin.dependencylock.tasks.GenerateLockTask$lockableConfigurations.callStatic(Unknown Source)
	at nebula.plugin.dependencylock.tasks.GenerateLockTask.lock(GenerateLockTask.groovy:91)
	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)