Allow empty accesstransformer files

[Tslat]

In FG7 (I'm not sure as of what version, but I'm currently on 7.0.0-rc5), there appears to be a check in ArtifactAccessTransformer#validateconfig that checks for a 'blank' accesstransformer file.

java.lang.IllegalStateException: Config file must not be blank at ...

I understand the logic behind this, but it is causing project templates to fail to set up, because template projects with an AT file don't put any transformers in there (since it's a template).

Can we remove this blank check, or make it toggleable or something in FG so I can allow it pls?

[Jonathing]

ForgeGradle 7.0.0-rc.2 and newer no longer use ArtifactAccessTransformer. Please verify that this issue still occurs on the latest version, 7.0.0-rc.5. It's possible that IntelliJ has cached the sources of whatever version of ForgeGradle 7 was used previously and the stacktrace is leading you to the wrong place. A full error message with a dull stacktrace would be most helpful and much appreciated.

[Tslat]

Did a full project cache wipe, still happening

If it helps, the full project is here:
https://github.com/Tslat/Mod-Templates/tree/1.21.11-Multiloader

Noting that I've got an AT in there at the moment so the thing doesn't error out

Stacktrace - Click to expand

java.lang.IllegalStateException: Config file must not be blank at C:\Users\Tslat\Workspace\Mod-Templates\common\src\main\resources\META-INF\accesstransformer.cfg
at net.minecraftforge.accesstransformers.gradle.ArtifactAccessTransformer.validateConfig(ArtifactAccessTransformer.java:343)
at net.minecraftforge.accesstransformers.gradle.AccessTransformersExtensionImpl.register(AccessTransformersExtensionImpl.java:234)
at net.minecraftforge.accesstransformers.gradle.AccessTransformersExtensionImpl.apply(AccessTransformersExtensionImpl.java:93)
at net.minecraftforge.accesstransformers.gradle.AccessTransformersExtensionImpl.lambda$new$0(AccessTransformersExtensionImpl.java:57)
at org.gradle.internal.code.DefaultUserCodeApplicationContext$CurrentApplication$1.execute(DefaultUserCodeApplicationContext.java:124)
at org.gradle.api.internal.DefaultCollectionCallbackActionDecorator$BuildOperationEmittingAction$1.run(DefaultCollectionCallbackActionDecorator.java:109)
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47)
at org.gradle.api.internal.DefaultCollectionCallbackActionDecorator$BuildOperationEmittingAction.execute(DefaultCollectionCallbackActionDecorator.java:106)
at org.gradle.internal.ImmutableActionSet$SetWithFewActions.execute(ImmutableActionSet.java:286)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.lambda$runDependencyActions$2(DefaultConfiguration.java:461)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.runActionInHierarchy(DefaultConfiguration.java:1022)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.runDependencyActions(DefaultConfiguration.java:459)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$1.call(DefaultConfiguration.java:626)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$1.call(DefaultConfiguration.java:623)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:209)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveGraphInBuildOperation(DefaultConfiguration.java:623)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.lambda$resolveExclusivelyIfRequired$3(DefaultConfiguration.java:615)
at org.gradle.api.internal.project.DefaultProjectStateRegistry$CalculatedModelValueImpl.update(DefaultProjectStateRegistry.java:546)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveExclusivelyIfRequired(DefaultConfiguration.java:610)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveGraphIfRequired(DefaultConfiguration.java:603)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$900(DefaultConfiguration.java:142)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ResolverResultsResolutionResultProvider.getValue(DefaultConfiguration.java:585)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ResolverResultsResolutionResultProvider.getValue(DefaultConfiguration.java:571)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getResolvedConfiguration(DefaultConfiguration.java:524)
at org.gradle.api.internal.artifacts.configurations.DefaultResolvableConfiguration_Decorated.getResolvedConfiguration(Unknown Source)
at com.intellij.gradle.toolingExtension.impl.model.dependencyModel.GradleDependencyResolver.resolveDependencies(GradleDependencyResolver.java:113)
at com.intellij.gradle.toolingExtension.impl.model.dependencyModel.GradleDependencyResolver.resolveDependencies(GradleDependencyResolver.java:95)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyResolver.resolveDependencies(GradleSourceSetDependencyResolver.java:128)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyResolver.resolveDependenciesWithDefault(GradleSourceSetDependencyResolver.java:302)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyResolver.resolveSourceSetCompileDependencies(GradleSourceSetDependencyResolver.java:77)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyResolver.resolveDependencies(GradleSourceSetDependencyResolver.java:59)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyModelBuilder.lambda$collectDependencies$0(GradleSourceSetDependencyModelBuilder.java:49)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyModelBuilder.collectDependencies(GradleSourceSetDependencyModelBuilder.java:48)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyModelBuilder.buildAll(GradleSourceSetDependencyModelBuilder.java:31)
at com.intellij.gradle.toolingExtension.impl.modelBuilder.ExtraModelBuilder.buildServiceModel(ExtraModelBuilder.java:87)
at com.intellij.gradle.toolingExtension.impl.modelBuilder.ExtraModelBuilder.buildAll(ExtraModelBuilder.java:67)
at com.intellij.gradle.toolingExtension.impl.modelBuilder.ExtraModelBuilder.buildAll(ExtraModelBuilder.java:47)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$BuilderWithParameter.build(DefaultToolingModelBuilderRegistry.java:295)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$UserCodeAssigningBuilder.lambda$build$0(DefaultToolingModelBuilderRegistry.java:382)
at org.gradle.internal.code.DefaultUserCodeApplicationContext$CurrentApplication.reapply(DefaultUserCodeApplicationContext.java:110)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$UserCodeAssigningBuilder.build(DefaultToolingModelBuilderRegistry.java:382)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$LockProjectStateBuilder.lambda$build$0(DefaultToolingModelBuilderRegistry.java:312)
at org.gradle.internal.work.DefaultWorkerLeaseService.lambda$withLocksAcquired$0(DefaultWorkerLeaseService.java:269)
at org.gradle.internal.work.ResourceLockStatistics$1.measure(ResourceLockStatistics.java:42)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocksAcquired(DefaultWorkerLeaseService.java:267)
at org.gradle.internal.work.DefaultWorkerLeaseService.lambda$withReplacedLocks$3(DefaultWorkerLeaseService.java:365)
at org.gradle.internal.work.DefaultWorkerLeaseService.withoutLocks(DefaultWorkerLeaseService.java:337)
at org.gradle.internal.work.DefaultWorkerLeaseService.withReplacedLocks(DefaultWorkerLeaseService.java:364)
at org.gradle.api.internal.project.DefaultProjectStateRegistry$ProjectStateImpl.runWithModelLock(DefaultProjectStateRegistry.java:471)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$LockProjectStateBuilder.build(DefaultToolingModelBuilderRegistry.java:312)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$BuildOperationWrappingBuilder$1.call(DefaultToolingModelBuilderRegistry.java:345)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:209)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
at org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$BuildOperationWrappingBuilder.build(DefaultToolingModelBuilderRegistry.java:342)
at org.gradle.internal.build.DefaultBuildToolingModelController$AbstractToolingScope.getModel(DefaultBuildToolingModelController.java:88)
at org.gradle.internal.buildtree.DefaultBuildTreeModelCreator$DefaultBuildTreeModelController.getModelForScope(DefaultBuildTreeModelCreator.java:156)
at org.gradle.internal.buildtree.DefaultBuildTreeModelCreator$DefaultBuildTreeModelController.access$300(DefaultBuildTreeModelCreator.java:69)
at org.gradle.internal.buildtree.DefaultBuildTreeModelCreator$DefaultBuildTreeModelController$1.call(DefaultBuildTreeModelCreator.java:85)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:209)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
at org.gradle.internal.buildtree.DefaultBuildTreeModelCreator$DefaultBuildTreeModelController.getModel(DefaultBuildTreeModelCreator.java:80)
at org.gradle.tooling.internal.provider.runner.DefaultBuildController.doGetModel(DefaultBuildController.java:126)
at org.gradle.tooling.internal.provider.runner.DefaultBuildController.getModel(DefaultBuildController.java:113)
at org.gradle.tooling.internal.consumer.connection.ParameterAwareBuildControllerAdapter.getModel(ParameterAwareBuildControllerAdapter.java:40)
at org.gradle.tooling.internal.consumer.connection.UnparameterizedBuildController.getModel(UnparameterizedBuildController.java:116)
at org.gradle.tooling.internal.consumer.connection.NestedActionAwareBuildControllerAdapter.getModel(NestedActionAwareBuildControllerAdapter.java:32)
at org.gradle.tooling.internal.consumer.connection.UnparameterizedBuildController.findModel(UnparameterizedBuildController.java:100)
at org.gradle.tooling.internal.consumer.connection.NestedActionAwareBuildControllerAdapter.findModel(NestedActionAwareBuildControllerAdapter.java:32)
at org.gradle.tooling.internal.consumer.connection.UnparameterizedBuildController.findModel(UnparameterizedBuildController.java:84)
at org.gradle.tooling.internal.consumer.connection.NestedActionAwareBuildControllerAdapter.findModel(NestedActionAwareBuildControllerAdapter.java:32)
at org.jetbrains.plugins.gradle.model.DefaultBuildController.findModel(DefaultBuildController.java:90)
at com.intellij.gradle.toolingExtension.impl.util.GradleModelProviderUtil.buildModelsInSequence(GradleModelProviderUtil.java:65)
at com.intellij.gradle.toolingExtension.impl.util.GradleModelProviderUtil.buildModels(GradleModelProviderUtil.java:27)
at com.intellij.gradle.toolingExtension.impl.model.sourceSetDependencyModel.GradleSourceSetDependencyModelProvider.populateModels(GradleSourceSetDependencyModelProvider.java:33)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$populateModels$13(GradleModelFetchAction.java:247)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.lambda$runWithSpan$1(GradleOpenTelemetry.java:37)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:55)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:31)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.runWithSpan(GradleOpenTelemetry.java:36)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.populateModels(GradleModelFetchAction.java:246)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$executeAction$11(GradleModelFetchAction.java:228)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.lambda$runWithSpan$1(GradleOpenTelemetry.java:37)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:55)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:31)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.runWithSpan(GradleOpenTelemetry.java:36)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$executeAction$12(GradleModelFetchAction.java:226)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.executeAction(GradleModelFetchAction.java:225)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$doExecute$5(GradleModelFetchAction.java:125)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.lambda$runWithSpan$1(GradleOpenTelemetry.java:37)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:55)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:31)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.runWithSpan(GradleOpenTelemetry.java:36)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.doExecute(GradleModelFetchAction.java:124)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$execute$1(GradleModelFetchAction.java:103)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:55)
at com.intellij.gradle.toolingExtension.impl.telemetry.GradleOpenTelemetry.callWithSpan(GradleOpenTelemetry.java:31)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$execute$2(GradleModelFetchAction.java:102)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.withOpenTelemetry(GradleModelFetchAction.java:291)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.lambda$execute$3(GradleModelFetchAction.java:101)
at com.intellij.gradle.toolingExtension.impl.util.GradleExecutorServiceUtil.withSingleThreadExecutor(GradleExecutorServiceUtil.java:18)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.execute(GradleModelFetchAction.java:100)
at com.intellij.gradle.toolingExtension.impl.modelAction.GradleModelFetchAction.execute(GradleModelFetchAction.java:34)
at org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter.execute(InternalBuildActionAdapter.java:65)
at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.executeAction(AbstractClientProvidedBuildActionRunner.java:108)
at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.runAction(AbstractClientProvidedBuildActionRunner.java:96)
at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.fromBuildModel(AbstractClientProvidedBuildActionRunner.java:85)
at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner$ActionAdapter.fromBuildModel(AbstractClientProvidedBuildActionRunner.java:68)
at org.gradle.internal.buildtree.DefaultBuildTreeModelCreator.fromBuildModel(DefaultBuildTreeModelCreator.java:66)
at org.gradle.internal.cc.impl.barrier.BarrierAwareBuildTreeModelCreator.fromBuildModel$lambda$0(BarrierAwareBuildTreeModelCreator.kt:36)
at org.gradle.internal.cc.impl.barrier.VintageConfigurationTimeActionRunner.runConfigurationTimeAction(VintageConfigurationTimeActionRunner.kt:48)
at org.gradle.internal.cc.impl.barrier.BarrierAwareBuildTreeModelCreator.fromBuildModel(BarrierAwareBuildTreeModelCreator.kt:35)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.lambda$fromBuildModel$2(DefaultBuildTreeLifecycleController.java:90)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.lambda$runBuild$4(DefaultBuildTreeLifecycleController.java:120)
at org.gradle.internal.model.StateTransitionController.lambda$transition$6(StateTransitionController.java:179)
at org.gradle.internal.model.StateTransitionController.doTransition(StateTransitionController.java:276)
at org.gradle.internal.model.StateTransitionController.lambda$transition$7(StateTransitionController.java:179)
at org.gradle.internal.work.DefaultSynchronizer.withLock(DefaultSynchronizer.java:45)
at org.gradle.internal.model.StateTransitionController.transition(StateTransitionController.java:179)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.runBuild(DefaultBuildTreeLifecycleController.java:117)
at org.gradle.internal.buildtree.DefaultBuildTreeLifecycleController.fromBuildModel(DefaultBuildTreeLifecycleController.java:82)
at org.gradle.tooling.internal.provider.runner.AbstractClientProvidedBuildActionRunner.runClientAction(AbstractClientProvidedBuildActionRunner.java:42)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner.run(ClientProvidedPhasedActionRunner.java:58)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.internal.buildtree.ProblemReportingBuildActionRunner.run(ProblemReportingBuildActionRunner.java:54)
at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:83)
at org.gradle.tooling.internal.provider.FileSystemWatchingBuildActionRunner.run(FileSystemWatchingBuildActionRunner.java:135)
at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:54)
at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.lambda$execute$0(RootBuildLifecycleBuildActionExecutor.java:101)
at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:126)
at org.gradle.launcher.exec.RootBuildLifecycleBuildActionExecutor.execute(RootBuildLifecycleBuildActionExecutor.java:101)
at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.runRootBuildAction(BuildTreeLifecycleBuildActionExecutor.java:98)
at org.gradle.launcher.exec.BuildTreeLifecycleBuildActionExecutor.execute(BuildTreeLifecycleBuildActionExecutor.java:69)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$2.call(RunAsBuildOperationBuildActionExecutor.java:65)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor$2.call(RunAsBuildOperationBuildActionExecutor.java:61)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:209)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:166)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionExecutor.execute(RunAsBuildOperationBuildActionExecutor.java:61)
at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.lambda$execute$0(RunAsWorkerThreadBuildActionExecutor.java:36)
at org.gradle.internal.work.DefaultWorkerLeaseService.lambda$withLocksAcquired$0(DefaultWorkerLeaseService.java:269)
at org.gradle.internal.work.ResourceLockStatistics$1.measure(ResourceLockStatistics.java:42)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocksAcquired(DefaultWorkerLeaseService.java:267)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:259)
at org.gradle.internal.work.DefaultWorkerLeaseService.runAsWorkerThread(DefaultWorkerLeaseService.java:127)
at org.gradle.launcher.exec.RunAsWorkerThreadBuildActionExecutor.execute(RunAsWorkerThreadBuildActionExecutor.java:36)
at org.gradle.tooling.internal.provider.continuous.ContinuousBuildActionExecutor.execute(ContinuousBuildActionExecutor.java:110)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecutor.execute(SubscribableBuildActionExecutor.java:64)
at org.gradle.internal.session.DefaultBuildSessionContext.execute(DefaultBuildSessionContext.java:46)
at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor$ActionImpl.apply(BuildSessionLifecycleBuildActionExecutor.java:106)
at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor$ActionImpl.apply(BuildSessionLifecycleBuildActionExecutor.java:94)
at org.gradle.internal.session.BuildSessionState.run(BuildSessionState.java:73)
at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor.execute(BuildSessionLifecycleBuildActionExecutor.java:67)
at org.gradle.internal.buildprocess.execution.BuildSessionLifecycleBuildActionExecutor.execute(BuildSessionLifecycleBuildActionExecutor.java:45)
at org.gradle.internal.buildprocess.execution.StartParamsValidatingActionExecutor.execute(StartParamsValidatingActionExecutor.java:57)
at org.gradle.internal.buildprocess.execution.StartParamsValidatingActionExecutor.execute(StartParamsValidatingActionExecutor.java:32)
at org.gradle.internal.buildprocess.execution.SessionFailureReportingActionExecutor.execute(SessionFailureReportingActionExecutor.java:51)
at org.gradle.internal.buildprocess.execution.SessionFailureReportingActionExecutor.execute(SessionFailureReportingActionExecutor.java:39)
at org.gradle.internal.buildprocess.execution.SetupLoggingActionExecutor.execute(SetupLoggingActionExecutor.java:47)
at org.gradle.internal.buildprocess.execution.SetupLoggingActionExecutor.execute(SetupLoggingActionExecutor.java:31)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:70)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:39)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:29)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:35)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.lambda$execute$0(ForwardClientInput.java:40)
at org.gradle.internal.daemon.clientinput.ClientInputForwarder.forwardInput(ClientInputForwarder.java:80)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:64)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:63)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:84)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:52)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator.lambda$runCommand$0(DaemonStateCoordinator.java:321)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:47)

[Tslat]

Funnily enough, it only checks for a blank file, so even just putting a comment in there allows it through

[LexManos]

This is a user error, and also not something that has to do with ForgeGradle.
As Jonathing said, FG no longer directly uses ArtifactAccessTransformer, that is part of the stand alone AccessTransformer gradle plugin.

You are explicitly using the AccessTransformer gradle plugin to transform your own code.
You are explicitly telling it that you need to transform the common project using the common project's own config.
This is a costly process that has both performance and consumer implications and thus should not be done unless you need to.
This is EXPLICITLY the user error that this check is designed to detect.

And it's an error I already explained to you last time you asked.
Configure your project correctly.

If you do need to access transform your own code I would suggest changing your common project to expose proper APIs so that you do not have to Transform your own code.

If you insist of having this setup, then you can do what you already do and have a conditional in your buildscript.

I am not seeing why we need to suppress an error as this is a case where a user's explicit actions are invalid. And thus we should tell the user that they are doing something wrong.

Because you seem to be missing the point what you PROBABLY want is something like this:

    implementation(minecraft.dependency(libs.forge)) {
        def at = rootProject.file("common/src/main/resources/META-INF/accesstransformer.cfg")
        if (at.exists())
          accessTransformer.setFrom(at)
    }

[Jonathing]

For reference, the code in ForgeGradle 7 that grabs user-defined AccessTransformer configuration files does not check the contents of those files. They are passed as file paths into Mavenizer directly, which also indiscriminately runs AccessTranformer using them without any sort of validation beforehand, since that is the job of AccessTransformer.
See MinecraftExtensionImpl.java:428-432.

I understand that ForgeGradle 7's current lack of documentation makes it difficult to understand exactly how the new DSL features work or what has changed in the various betas. That is why we created our new MDKExamples repository, so that there are existing examples that can be built off of. This is our stop-gap for now while @Fealtous and I work on actual documentation in the near future.

The behavior of the AccessTransformers Gradle plugin is very different from ForgeGradle 7's usage of the accessTransformer property for the Minecraft extension/dependency. It does need a little work, but as of ForgeGradle 7.0.0-beta.2, ForgeGradle 7 and AccessTransformers Gradle are divorced from each other. You should only use the former if you need to access transform a non-Minecraft dependency. Additionally, for advanced build engineering, you can simply use the ArtifactAccessTransformer class directly to register the artifact transformer as you see fit. The reason why ForgeGradle 7 no longer depends on AccessTransformers Gradle for access transformation is due to bugs in IDEs that prevent the artifact's sources from being attached.