When Expressions Status

When a Task is skipped because its When Expressions evaluated to false,
its resolved When Expressions are listed alongside the PipelineTaskName
in the SkippedTasks section of the PipelineRunStatus.

When a Task is executed because its When Expressions evaluated to true,
its resolved When Expressions are listed in the TaskRuns section of the
PipelineRunStatus.

Further details in https://github.com/tektoncd/community/blob/master/teps/0007-conditions-beta.md#status-1

Closes tektoncd#3139

docs/pipelineruns.md

@@ -458,8 +458,8 @@ False|PipelineRunTimeout|Yes|The `PipelineRun` timed out.
 When a `PipelineRun` changes status, [events](events.md#pipelineruns) are triggered accordingly.
 
 When a `PipelineRun` has `Tasks` with [WhenExpressions](pipelines.md#guard-task-execution-using-whenexpressions):
-- If the `WhenExpressions` evaluate to `true`, the `Task` is executed and the `TaskRun` will be listed in the `Task Runs` section of the `status` of the `PipelineRun`.
-- If the `WhenExpressions` evaluate to `false`, the `Task` is skipped and it is listed in the `Skipped Tasks` section of the `status` of the `PipelineRun`. 
+- If the `WhenExpressions` evaluate to `true`, the `Task` is executed then the `TaskRun` and its resolved `WhenExpressions` will be listed in the `Task Runs` section of the `status` of the `PipelineRun`.
+- If the `WhenExpressions` evaluate to `false`, the `Task` is skipped then its name and its resolved `WhenExpressions` will be listed in the `Skipped Tasks` section of the `status` of the `PipelineRun`. 
 
 ```yaml
 Conditions:
@@ -470,11 +470,25 @@ Conditions:
   Type:                  Succeeded
 Skipped Tasks:
   Name:       skip-this-task
+  When Expressions:
+    Input:     foo
+    Operator:  in
+    Values:
+      bar
+    Input:     foo
+    Operator:  notin
+    Values:
+      foo
 Task Runs:
   pipelinerun-to-skip-task-run-this-task-r2djj:
     Pipeline Task Name:  run-this-task
     Status:
       ...
+    When Expressions:
+      Input:     foo
+      Operator:  in
+      Values:
+        foo
 ```
 
 ## Cancelling a `PipelineRun`

pkg/apis/pipeline/v1beta1/pipelinerun_types.go

@@ -342,6 +342,9 @@ type PipelineRunStatusFields struct {
 type SkippedTask struct {
 	// Name is the Pipeline Task name
 	Name string `json:"name"`
+	// WhenExpressions is the list of checks guarding the execution of the PipelineTask
+	// +optional
+	WhenExpressions []WhenExpression `json:"whenExpressions,omitempty"`
 }
 
 // PipelineRunResult used to describe the results of a pipeline
@@ -363,6 +366,9 @@ type PipelineRunTaskRunStatus struct {
 	// ConditionChecks maps the name of a condition check to its Status
 	// +optional
 	ConditionChecks map[string]*PipelineRunConditionCheckStatus `json:"conditionChecks,omitempty"`
+	// WhenExpressions is the list of checks guarding the execution of the PipelineTask
+	// +optional
+	WhenExpressions []WhenExpression `json:"whenExpressions,omitempty"`
 }
 
 // PipelineRunConditionCheckStatus returns the condition check status

pkg/reconciler/pipelinerun/pipelinerun_test.go

@@ -762,7 +762,12 @@ func TestUpdateTaskRunsState(t *testing.T) {
 	// from a TaskRun associated to the PipelineRun
 	pr := tb.PipelineRun("test-pipeline-run", tb.PipelineRunNamespace("foo"), tb.PipelineRunSpec("test-pipeline"))
 	pipelineTask := v1beta1.PipelineTask{
-		Name:    "unit-test-1",
+		Name: "unit-test-1",
+		WhenExpressions: []v1beta1.WhenExpression{{
+			Input:    "foo",
+			Operator: selection.In,
+			Values:   []string{"foo", "bar"},
+		}},
 		TaskRef: &v1beta1.TaskRef{Name: "unit-test-task"},
 	}
 	task := tb.Task("unit-test-task", tb.TaskSpec(
@@ -792,6 +797,11 @@ func TestUpdateTaskRunsState(t *testing.T) {
 				Conditions: []apis.Condition{{Type: apis.ConditionSucceeded}},
 			},
 		},
+		WhenExpressions: []v1beta1.WhenExpression{{
+			Input:    "foo",
+			Operator: selection.In,
+			Values:   []string{"foo", "bar"},
+		}},
 	}
 	expectedPipelineRunStatus := v1beta1.PipelineRunStatus{
 		PipelineRunStatusFields: v1beta1.PipelineRunStatusFields{
@@ -809,7 +819,7 @@ func TestUpdateTaskRunsState(t *testing.T) {
 	}}
 	pr.Status.InitializeConditions()
 	status := state.GetTaskRunsStatus(pr)
-	if d := cmp.Diff(status, expectedPipelineRunStatus.TaskRuns); d != "" {
+	if d := cmp.Diff(expectedPipelineRunStatus.TaskRuns, status); d != "" {
 		t.Fatalf("Expected PipelineRun status to match TaskRun(s) status, but got a mismatch: %s", diff.PrintWantGot(d))
 	}
 
@@ -2076,9 +2086,28 @@ func TestReconcileWithWhenExpressionsWithParameters(t *testing.T) {
 		t.Errorf("expected to see TaskRun %v created. Diff %s", expectedTaskRunName, diff.PrintWantGot(d))
 	}
 
+	actualWhenExpressionsInTaskRun := pipelineRun.Status.PipelineRunStatusFields.TaskRuns[expectedTaskRunName].WhenExpressions
+	expectedWhenExpressionsInTaskRun := []v1beta1.WhenExpression{{
+		Input:    "foo",
+		Operator: "notin",
+		Values:   []string{"bar"},
+	}, {
+		Input:    "yes",
+		Operator: "in",
+		Values:   []string{"yes"},
+	}}
+	if d := cmp.Diff(expectedWhenExpressionsInTaskRun, actualWhenExpressionsInTaskRun); d != "" {
+		t.Errorf("expected to see When Expressions %v created. Diff %s", expectedTaskRunName, diff.PrintWantGot(d))
+	}
+
 	actualSkippedTasks := pipelineRun.Status.SkippedTasks
 	expectedSkippedTasks := []v1beta1.SkippedTask{{
 		Name: "hello-world-2",
+		WhenExpressions: v1beta1.WhenExpressions{{
+			Input:    "yes",
+			Operator: "notin",
+			Values:   []string{"yes"},
+		}},
 	}}
 	if d := cmp.Diff(actualSkippedTasks, expectedSkippedTasks); d != "" {
 		t.Errorf("expected to find Skipped Tasks %v. Diff %s", expectedSkippedTasks, diff.PrintWantGot(d))
@@ -2197,9 +2226,28 @@ func TestReconcileWithWhenExpressionsWithTaskResults(t *testing.T) {
 		t.Errorf("expected to see TaskRun %v created. Diff %s", expectedTaskRunName, diff.PrintWantGot(d))
 	}
 
+	actualWhenExpressionsInTaskRun := pipelineRun.Status.PipelineRunStatusFields.TaskRuns[expectedTaskRunName].WhenExpressions
+	expectedWhenExpressionsInTaskRun := []v1beta1.WhenExpression{{
+		Input:    "aResultValue",
+		Operator: "in",
+		Values:   []string{"aResultValue"},
+	}, {
+		Input:    "aResultValue",
+		Operator: "in",
+		Values:   []string{"aResultValue"},
+	}}
+	if d := cmp.Diff(expectedWhenExpressionsInTaskRun, actualWhenExpressionsInTaskRun); d != "" {
+		t.Errorf("expected to see When Expressions %v created. Diff %s", expectedTaskRunName, diff.PrintWantGot(d))
+	}
+
 	actualSkippedTasks := pipelineRun.Status.SkippedTasks
 	expectedSkippedTasks := []v1beta1.SkippedTask{{
 		Name: "c-task",
+		WhenExpressions: v1beta1.WhenExpressions{{
+			Input:    "aResultValue",
+			Operator: "in",
+			Values:   []string{"missing"},
+		}},
 	}, {
 		Name: "d-task",
 	}}

pkg/reconciler/pipelinerun/resources/pipelinerunstate.go

@@ -75,6 +75,7 @@ func (state PipelineRunState) GetTaskRunsStatus(pr *v1beta1.PipelineRun) map[str
 		if prtrs == nil {
 			prtrs = &v1beta1.PipelineRunTaskRunStatus{
 				PipelineTaskName: rprt.PipelineTask.Name,
+				WhenExpressions:  rprt.PipelineTask.WhenExpressions,
 			}
 		}
 
@@ -281,10 +282,14 @@ func (facts *PipelineRunFacts) GetPipelineConditionStatus(pr *v1beta1.PipelineRu
 }
 
 func (facts *PipelineRunFacts) GetSkippedTasks() []v1beta1.SkippedTask {
-	skipped := []v1beta1.SkippedTask{}
+	var skipped []v1beta1.SkippedTask
 	for _, rprt := range facts.State {
 		if rprt.Skip(facts) {
-			skipped = append(skipped, v1beta1.SkippedTask{Name: rprt.PipelineTask.Name})
+			skippedTask := v1beta1.SkippedTask{
+				Name:            rprt.PipelineTask.Name,
+				WhenExpressions: rprt.PipelineTask.WhenExpressions,
+			}
+			skipped = append(skipped, skippedTask)
 		}
 	}
 	return skipped