Update Gradle to v7.6

This closes #242

Signed-off-by: Vladimir Sitnikov <sitnikov.vladimir@gmail.com>

Author: vlsi

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f6b8596b10cce501591e92f229816aa4046424f3b24d771751b06779d58c8ec4
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distributionSha256Sum=7ba68c54029790ab444b39d7e293d3236b2632631fb5f2e012bb28b4ff669e4b
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f6b8596b10cce501591e92f229816aa4046424f3b24d771751b06779d58c8ec4
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distributionSha256Sum=7ba68c54029790ab444b39d7e293d3236b2632631fb5f2e012bb28b4ff669e4b
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -17,9 +17,11 @@
 package dev.sigstore.sign
 
 import org.gradle.api.DefaultTask
+import org.gradle.api.Task
 import org.gradle.api.file.RegularFile
 import org.gradle.api.provider.Provider
 import org.gradle.api.publish.internal.PublicationInternal
+import org.gradle.api.specs.Spec
 import org.gradle.api.tasks.TaskProvider
 import java.io.File
 
@@ -31,5 +33,17 @@ internal class DefaultDerivedArtifactFile(
         fileProvider.get().asFile
 
     override fun shouldBePublished(): Boolean =
-        task.get().run { enabled && onlyIf.isSatisfiedBy(this) }
+        task.get().run { enabled && onlyIfSatisfied() }
+
+    /**
+     * Gradle 7.6 changed the type of `onlyIf` from `Spec<in Task>` to `SelfDescribingSpec<in Task>`,
+     * so we need to use reflection to support slightly older Gradle versions in runtime.
+     * @see [NoSuchMethodError org.gradle.api.DefaultTask.getOnlyIf when trying to run plugin compiled with Gradle 7.6 with Gradle 7.5.1](https://github.com/gradle/gradle/issues/23520)
+     */
+    private fun Task.onlyIfSatisfied() : Boolean {
+        val getOnlyIf = DefaultTask::class.java.getMethod("getOnlyIf")
+        @Suppress("UNCHECKED_CAST")
+        val onlyIf = getOnlyIf.invoke(this) as Spec<in Task>
+        return onlyIf.isSatisfiedBy(this)
+    }
 }