Latest version 0.43.0 requires Gradle 7

[twwwt]

After upgrading from version 0.42.0 to 0.43.0, and using Gradle 6.9.1, I get the following exception:

Caused by: java.lang.NoClassDefFoundError: groovy/xml/XmlSlurper
        at com.github.benmanes.gradle.versions.updates.Resolver$Companion.getUrlFromPom(Resolver.kt:420)
        at com.github.benmanes.gradle.versions.updates.Resolver$Companion.access$getUrlFromPom(Resolver.kt:418)
        at com.github.benmanes.gradle.versions.updates.Resolver.resolveProjectUrl(Resolver.kt:373)
        at com.github.benmanes.gradle.versions.updates.Resolver.getProjectUrl(Resolver.kt:352)
        at com.github.benmanes.gradle.versions.updates.Resolver.getStatus(Resolver.kt:74)
        at com.github.benmanes.gradle.versions.updates.Resolver.resolve(Resolver.kt:57)
        at com.github.benmanes.gradle.versions.updates.DependencyUpdates.resolve(DependencyUpdates.kt:86)
        at com.github.benmanes.gradle.versions.updates.DependencyUpdates.resolveProjects(DependencyUpdates.kt:72)
        at com.github.benmanes.gradle.versions.updates.DependencyUpdates.run(DependencyUpdates.kt:40)
        at com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask.dependencyUpdates(DependencyUpdatesTask.kt:129)
        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.internal.reflect.JavaMethod.invoke(JavaMethod.java:104)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:58)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:51)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:29)
[...]

Using Gradle 7.5.1, however, it works. Was it intentional to require Gradle 7 with the latest release? Otherwise, I would like to ask to restore compatibility with Gradle 6.

[ben-manes]

I think this was due to Gradle upgrading their version of Groovy which moved the package around (#656). We do run tests against older versions, which passes for 5.0+ so we had hoped it would not regress.

You are welcome to send a PR if we can restore that functionality, but otherwise I think it's okay to have a new minimum required version and users on older version can use earlier plugin versions. In that case we might want to update the error message rather than showing a stacktrace (our minimum version check).

[twwwt]

I think this was due to Gradle upgrading their version of Groovy which moved the package around (#656).

Groovy 2 has groovy.util.XmlSlurper, while Groovy 3 has groovy.xml.XmlSlurper, the latter being what you use now. Gradle 6 uses Groovy 2, Gradle 7 uses Groovy 3. So, either you want to use Groovy 3 (which implies minimum required version is Gradle 7), or you do not. Do you want to?

We do run tests against older versions, which passes for 5.0+ so we had hoped it would not regress.

I doubt that these tests still run with Gradle 5; do they? If they do, the only thing I can imagine is that you have implemented a kind of dynamic switching between the two XMLSlurper variants depending on what is found in the classpath and that works with Gradle 5 and 7, but not 6.

You are welcome to send a PR if we can restore that functionality, but otherwise I think it's okay to have a new minimum required version and users on older version can use earlier plugin versions. In that case we might want to update the error message rather than showing a stacktrace (our minimum version check).

Actually, I'm fine with using a previous version of the plugin to get it working with Gradle 6. I just wanted to know what your intentions are and what the minimum Gradle version is that the plugin requires. There is no changelog nor did I find any other documentation from which I can get that information.

[ben-manes]

Okay, I updated the release notes so that hopefully others won't be caught by surprise. thanks!

[ben-manes]

Oh, and yes the tests run with different versions. I don't know why they pass either.

DifferentGradleVersionsSpec > dependencyUpdates task completes without errors with Gradle #gradleVersion > com.github.benmanes.gradle.versions.DifferentGradleVersionsSpec.dependencyUpdates task completes without errors with Gradle 5.0 STANDARD_OUT
    Downloading https://services.gradle.org/distributions/gradle-5.0-bin.zip
    .................................................................................

DifferentGradleVersionsSpec > dependencyUpdates task completes without errors with Gradle #gradleVersion > com.github.benmanes.gradle.versions.DifferentGradleVersionsSpec.dependencyUpdates task completes without errors with Gradle 5.0 PASSED