Revert work-around removal from #719 and properly fix #711

config/codenarc/codenarc.xml

@@ -77,6 +77,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     <exclude name="CyclomaticComplexity"/>
     <exclude name="NestedBlockDepth"/>
     <exclude name="MethodCount"/>
+    <exclude name="ParameterCount"/>
   </ruleset-ref>
   <ruleset-ref path='rulesets/unused.xml'/>
   <ruleset-ref path='rulesets/unnecessary.xml'>

src/main/groovy/com/google/protobuf/gradle/ProtobufExtract.groovy

@@ -35,11 +35,9 @@ import org.gradle.api.file.ConfigurableFileCollection
 import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.file.DuplicatesStrategy
 import org.gradle.api.file.FileCollection
-import org.gradle.api.file.FileSystemLocation
 import org.gradle.api.file.FileTree
 import org.gradle.api.logging.Logger
 import org.gradle.api.model.ObjectFactory
-import org.gradle.api.provider.ProviderFactory
 import org.gradle.api.tasks.InputFiles
 import org.gradle.api.tasks.Internal
 import org.gradle.api.tasks.OutputDirectory
@@ -71,6 +69,13 @@ abstract class ProtobufExtract extends DefaultTask {
   @Internal
   public abstract ConfigurableFileCollection getInputFiles()
 
+  /**
+   * A dummy task dependency to delay provider calculation for input proto files to execution time
+   * even with configuration cache enabled.
+   */
+  @Internal
+  abstract ConfigurableFileCollection getDummyTaskDependency()
+
   /**
    * Inputs for this task containing only proto files, which is enough for up-to-date checks.
    * Add inputs to inputFiles. Uses relative path sensitivity as directory layout changes impact output.
@@ -96,9 +101,6 @@ abstract class ProtobufExtract extends DefaultTask {
   @Inject
   protected abstract ObjectFactory getObjectFactory()
 
-  @Inject
-  protected abstract ProviderFactory getProviderFactory()
-
   private ArchiveActionFacade instantiateArchiveActionFacade() {
     if (GradleVersion.current() >= GradleVersion.version("6.0")) {
       // Use object factory to instantiate as that will inject the necessary service.
@@ -114,14 +116,17 @@ abstract class ProtobufExtract extends DefaultTask {
     // Provider.map seems broken for excluded tasks. Add inputFiles with all contents excluded for
     // the dependency it provides, but then provide the files we actually care about in our own
     // provider. https://github.com/google/protobuf-gradle-plugin/issues/550
-    PatternSet protoFilter = new PatternSet().include("**/*.proto")
+    // Additionally depend on a dummy task for the own provider so that it is executed at
+    // execution time even with configuration cache enabled.
+    // https://github.com/google/protobuf-gradle-plugin/issues/711
+    FileCollection inputFiles = this.inputFiles
     return objectFactory.fileCollection()
         .from(inputFiles.filter { false })
-        .from(
-          inputFiles.getElements().map { elements ->
+        .from(dummyTaskDependency.elements.map { unused ->
+            Set<File> files = inputFiles.files
+            PatternSet protoFilter = new PatternSet().include("**/*.proto")
             Set<Object> protoInputs = [] as Set
-            for (FileSystemLocation e : elements) {
-              File file = e.asFile
+            for (File file : files) {
               if (file.isDirectory()) {
                 protoInputs.add(file)
               } else if (file.path.endsWith('.proto')) {
@@ -148,7 +153,7 @@ abstract class ProtobufExtract extends DefaultTask {
                       || file.path.endsWith('.tgz')) {
                 protoInputs.add(archiveFacade.tarTree(file.path).matching(protoFilter))
               } else {
-                logger.debug "Skipping unsupported file type (${file.path});" +
+                logger.debug "Skipping unsupported file type (${file.path}); " +
                         "handles only jar, tar, tar.gz, tar.bz2 & tgz"
               }
             }

src/main/groovy/com/google/protobuf/gradle/ProtobufPlugin.groovy

@@ -44,6 +44,7 @@ import org.gradle.api.GradleException
 import org.gradle.api.NamedDomainObjectContainer
 import org.gradle.api.Plugin
 import org.gradle.api.Project
+import org.gradle.api.Task
 import org.gradle.api.artifacts.Configuration
 import org.gradle.api.artifacts.type.ArtifactTypeDefinition
 import org.gradle.api.attributes.LibraryElements
@@ -129,28 +130,29 @@ class ProtobufPlugin implements Plugin<Project> {
         // extract included protos from {@code variant.compileConfiguration}
         // of each variant.
         Collection<Closure> postConfigure = []
+        Provider<Task> dummyTask = project.tasks.register("protobufDummy")
         if (isAndroid) {
           project.android.sourceSets.configureEach { sourceSet ->
             ProtoSourceSet protoSourceSet = protobufExtension.sourceSets.create(sourceSet.name)
             addSourceSetExtension(sourceSet, protoSourceSet)
             Configuration protobufConfig = createProtobufConfiguration(protoSourceSet)
-            setupExtractProtosTask(protoSourceSet, protobufConfig)
+            setupExtractProtosTask(protoSourceSet, protobufConfig, dummyTask)
           }
 
           NamedDomainObjectContainer<ProtoSourceSet> variantSourceSets =
             project.objects.domainObjectContainer(ProtoSourceSet) { String name ->
               new DefaultProtoSourceSet(name, project.objects)
             }
           ProjectExt.forEachVariant(this.project) { BaseVariant variant ->
-            addTasksForVariant(variant, variantSourceSets, postConfigure)
+            addTasksForVariant(variant, variantSourceSets, postConfigure, dummyTask)
           }
         } else {
           project.sourceSets.configureEach { sourceSet ->
             ProtoSourceSet protoSourceSet = protobufExtension.sourceSets.create(sourceSet.name)
             addSourceSetExtension(sourceSet, protoSourceSet)
             Configuration protobufConfig = createProtobufConfiguration(protoSourceSet)
             Configuration compileProtoPath = createCompileProtoPathConfiguration(protoSourceSet)
-            addTasksForSourceSet(sourceSet, protoSourceSet, protobufConfig, compileProtoPath, postConfigure)
+            addTasksForSourceSet(sourceSet, protoSourceSet, protobufConfig, compileProtoPath, postConfigure, dummyTask)
           }
         }
         project.afterEvaluate {
@@ -237,11 +239,11 @@ class ProtobufPlugin implements Plugin<Project> {
      */
     private void addTasksForSourceSet(
         SourceSet sourceSet, ProtoSourceSet protoSourceSet, Configuration protobufConfig,
-        Configuration compileProtoPath, Collection<Closure> postConfigure) {
-      Provider<ProtobufExtract> extractProtosTask = setupExtractProtosTask(protoSourceSet, protobufConfig)
+        Configuration compileProtoPath, Collection<Closure> postConfigure, Provider<Task> dummyTask) {
+      Provider<ProtobufExtract> extractProtosTask = setupExtractProtosTask(protoSourceSet, protobufConfig, dummyTask)
 
       Provider<ProtobufExtract> extractIncludeProtosTask = setupExtractIncludeProtosTask(
-        protoSourceSet, compileProtoPath)
+        protoSourceSet, compileProtoPath, dummyTask)
 
       // Make protos in 'test' sourceSet able to import protos from the 'main' sourceSet.
       // Pass include proto files from main to test.
@@ -295,7 +297,8 @@ class ProtobufPlugin implements Plugin<Project> {
     private void addTasksForVariant(
       Object variant,
       NamedDomainObjectContainer<ProtoSourceSet> variantSourceSets,
-      Collection<Closure> postConfigure
+      Collection<Closure> postConfigure,
+      Provider<Task> dummyTask
     ) {
       Boolean isTestVariant = variant instanceof TestVariant || variant instanceof UnitTestVariant
       ProtoSourceSet variantSourceSet = variantSourceSets.create(variant.name)
@@ -318,7 +321,7 @@ class ProtobufPlugin implements Plugin<Project> {
         }
       }
 
-      setupExtractIncludeProtosTask(variantSourceSet, classPathConfig)
+      setupExtractIncludeProtosTask(variantSourceSet, classPathConfig, dummyTask)
 
       // GenerateProto task, one per variant (compilation unit).
       variant.sourceSets.each { SourceProvider sourceProvider ->
@@ -422,14 +425,16 @@ class ProtobufPlugin implements Plugin<Project> {
      */
     private Provider<ProtobufExtract> setupExtractProtosTask(
       ProtoSourceSet protoSourceSet,
-      Configuration protobufConfig
+      Configuration protobufConfig,
+      Provider<Task> dummyTask
     ) {
       String sourceSetName = protoSourceSet.name
       String taskName = getExtractProtosTaskName(sourceSetName)
       Provider<ProtobufExtract> task = project.tasks.register(taskName, ProtobufExtract) {
         it.description = "Extracts proto files/dependencies specified by 'protobuf' configuration"
         it.destDir.set(getExtractedProtosDir(sourceSetName) as File)
         it.inputFiles.from(protobufConfig)
+        it.dummyTaskDependency.from(dummyTask)
       }
       protoSourceSet.proto.srcDir(task)
       return task
@@ -448,13 +453,15 @@ class ProtobufPlugin implements Plugin<Project> {
      */
     private Provider<ProtobufExtract> setupExtractIncludeProtosTask(
         ProtoSourceSet protoSourceSet,
-        FileCollection archives
+        FileCollection archives,
+        Provider<Task> dummyTask
     ) {
       String taskName = 'extractInclude' + Utils.getSourceSetSubstringForTaskNames(protoSourceSet.name) + 'Proto'
       Provider<ProtobufExtract> task = project.tasks.register(taskName, ProtobufExtract) {
         it.description = "Extracts proto files from compile dependencies for includes"
         it.destDir.set(getExtractedIncludeProtosDir(protoSourceSet.name) as File)
         it.inputFiles.from(archives)
+        it.dummyTaskDependency.from(dummyTask)
       }
       protoSourceSet.includeProtoDirs.from(task)
       return task