c

src/Runner.Worker/ActionManager.cs

@@ -139,10 +139,6 @@ namespace GitHub.Runner.Worker
 
                             preStepTracker[action.Id] = actionRunner;
                         }
-                        else if (!definition.Data.Execution.HasMain && definition.Data.Execution.HasCleanup)
-                        {
-                            throw new NotSupportedException($"Action {repoAction.Name}@{repoAction.Ref} only has `post` execution, `pre` or `main` is required for an actions.");
-                        }
                     }
                 }
             }

src/Runner.Worker/ActionRunner.cs

@@ -82,6 +82,13 @@ namespace GitHub.Runner.Worker
             ActionExecutionData handlerData = definition.Data?.Execution;
             ArgUtil.NotNull(handlerData, nameof(handlerData));
 
+            if (handlerData.HasInit &&
+                Action.Reference is Pipelines.RepositoryPathReference repoAction &&
+                string.Equals(repoAction.RepositoryType, Pipelines.PipelineConstants.SelfAlias, StringComparison.OrdinalIgnoreCase))
+            {
+                ExecutionContext.Warning($"`pre` execution is not supported for local action from '{repoAction.Path}'");
+            }
+
             // The action has post cleanup defined.
             // we need to create timeline record for them and add them to the step list that StepRunner is using
             if (handlerData.HasCleanup && (Stage == ActionRunStage.Pre || Stage == ActionRunStage.Main))

src/Test/L0/Worker/ActionManagerL0.cs

@@ -659,50 +659,9 @@ namespace GitHub.Runner.Common.Tests.Worker
                 {
                     await _actionManager.PrepareActionsAsync(_ec.Object, actions);
                 }
-                catch (NotSupportedException e)
+                catch (ArgumentNullException e)
                 {
-                    Assert.Contains("`pre` or `main` is required for an actions.", e.Message);
+                    Assert.Contains("Entry javascript fils is not provided.", e.Message);
-                }
-            }
-            finally
-            {
-                Teardown();
-            }
-        }
-
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Worker")]
-        public async void PrepareActions_RepositoryActionWithInvalidWrapperActionfile_Docker()
-        {
-            try
-            {
-                //Arrange
-                Setup();
-                var actionId = Guid.NewGuid();
-                var actions = new List<Pipelines.ActionStep>
-                {
-                    new Pipelines.ActionStep()
-                    {
-                        Name = "action",
-                        Id = actionId,
-                        Reference = new Pipelines.RepositoryPathReference()
-                        {
-                            Name = "TingluoHuang/runner_L0",
-                            Ref = "RepositoryActionWithInvalidWrapperActionfile_Docker",
-                            RepositoryType = "GitHub"
-                        }
-                    }
-                };
-
-                //Act
-                try
-                {
-                    await _actionManager.PrepareActionsAsync(_ec.Object, actions);
-                }
-                catch (NotSupportedException e)
-                {
-                    Assert.Contains("`pre` or `main` is required for an actions.", e.Message);
                 }
             }
             finally