add error message for deletion when args=0 and no --all flag

go.sum

@@ -791,6 +791,7 @@ k8s.io/apimachinery v0.0.0-20191004074956-01f8b7d1121a/go.mod h1:ccL7Eh7zubPUSh9
 k8s.io/apiserver v0.17.0/go.mod h1:ABM+9x/prjINN6iiffRVNCBR2Wk7uY4z+EtEGZD48cg=
 k8s.io/cli-runtime v0.0.0-20191004110054-fe9b9282443f h1:vJOrMsZe+RD884n+WQ5So2oOp7SajI0Op3oOBg64ZsY=
 k8s.io/cli-runtime v0.0.0-20191004110054-fe9b9282443f/go.mod h1:qWnH3/b8sp/l7EvlDh7ulDU3UWA4P4N1NFbEEP791tM=
+k8s.io/cli-runtime v0.17.3 h1:0ZlDdJgJBKsu77trRUynNiWsRuAvAVPBNaQfnt/1qtc=
 k8s.io/client-go v0.0.0-20191004102537-eb5b9a8cfde7 h1:WyPHgjjXvF4zVVwKGZKKiJGBUW45AuN44uSOuH8euuE=
 k8s.io/client-go v0.0.0-20191004102537-eb5b9a8cfde7/go.mod h1:7vJpHMYJwNQCWgzmNV+VYUl1zCObLyodBc8nIyt8L5s=
 k8s.io/cloud-provider v0.17.0/go.mod h1:Ze4c3w2C0bRsjkBUoHpFi+qWe3ob1wI2/7cUn+YQIDE=

pkg/cmd/clustertask/delete_test.go

@@ -130,6 +130,14 @@ func TestClusterTaskDelete(t *testing.T) {
 			wantError:   true,
 			want:        "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:        "Error from using clustertask delete with no names or --all",
+			command:     []string{"delete"},
+			input:       seeds[4],
+			inputStream: nil,
+			wantError:   true,
+			want:        "must provide clustertask name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {

pkg/cmd/condition/delete_test.go

@@ -149,6 +149,14 @@ func TestConditionDelete(t *testing.T) {
 			wantError:   true,
 			want:        "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:        "Error from using condition delete with no names or --all",
+			command:     []string{"delete"},
+			input:       seeds[4],
+			inputStream: nil,
+			wantError:   true,
+			want:        "must provide condition name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {

pkg/cmd/eventlistener/delete_test.go

@@ -145,6 +145,14 @@ func TestEventListenerDelete(t *testing.T) {
 			wantError:   true,
 			want:        "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:        "Error from using eventlistener delete with no names or --all",
+			command:     []string{"delete"},
+			input:       seeds[4],
+			inputStream: nil,
+			wantError:   true,
+			want:        "must provide eventlistener name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {

pkg/cmd/pipelineresource/delete_test.go

@@ -129,6 +129,14 @@ func TestPipelineResourceDelete(t *testing.T) {
 			wantError:   true,
 			want:        "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:        "Error from using resource delete with no names or --all",
+			command:     []string{"delete"},
+			input:       seeds[4],
+			inputStream: nil,
+			wantError:   true,
+			want:        "must provide pipelineresource name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {

pkg/cmd/pipelinerun/delete_test.go

@@ -167,7 +167,7 @@ func TestPipelineRunDelete(t *testing.T) {
 			input:       seeds[2],
 			inputStream: nil,
 			wantError:   true,
-			want:        "must provide pipelineruns to delete or --pipeline flag",
+			want:        "must provide pipelinerun name(s) or use --pipeline flag or --all flag to use delete",
 		},
 		{
 			name:        "Remove pipelineruns of a pipeline",

pkg/cmd/taskrun/delete_test.go

@@ -138,7 +138,7 @@ func TestTaskRunDelete(t *testing.T) {
 			input:       seeds[2],
 			inputStream: nil,
 			wantError:   true,
-			want:        "must provide taskruns to delete or --task flag",
+			want:        "must provide taskrun name(s) or use --task flag or --all flag to use delete",
 		},
 		{
 			name:        "Remove taskruns of a task",

pkg/cmd/triggerbinding/delete_test.go

@@ -145,6 +145,14 @@ func TestTriggerBindingDelete(t *testing.T) {
 			wantError:   true,
 			want:        "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:        "Error from using triggerbinding delete with no names or --all",
+			command:     []string{"delete"},
+			input:       seeds[4],
+			inputStream: nil,
+			wantError:   true,
+			want:        "must provide triggerbinding name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {

pkg/cmd/triggertemplate/delete_test.go

@@ -145,6 +145,14 @@ func TestTriggerTemplateDelete(t *testing.T) {
 			wantError:   true,
 			want:        "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:        "Error from using triggertemplate delete with no names or --all",
+			command:     []string{"delete"},
+			input:       seeds[4],
+			inputStream: nil,
+			wantError:   true,
+			want:        "must provide triggertemplate name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {

pkg/helper/options/delete.go

@@ -34,20 +34,29 @@ type DeleteOptions struct {
 }
 
 func (o *DeleteOptions) CheckOptions(s *cli.Stream, resourceNames []string, ns string) error {
+	// make sure no resource names are provided when using --all flag
 	if len(resourceNames) > 0 && (o.DeleteAllNs || o.DeleteAll) {
 		return fmt.Errorf("--all flag should not have any arguments or flags specified with it")
 	}
 
+	// make sure either resource names are provided, name of related resource,
+	// or --all specified if deleting PipelineRuns or TaskRuns
+	if len(resourceNames) == 0 && o.ParentResource != "" && o.ParentResourceName == "" && !o.DeleteAllNs {
+		return fmt.Errorf("must provide %s name(s) or use --%s flag or --all flag to use delete", o.Resource, o.ParentResource)
+	}
+
+	// make sure that resource name or --all flag is specified to use delete
+	// in non PipelineRun or TaskRun deletions
+	if len(resourceNames) == 0 && o.ParentResource == "" && o.ParentResourceName == "" && !o.DeleteAllNs && !o.DeleteAll {
+		return fmt.Errorf("must provide %s name(s) or use --all flag with delete", o.Resource)
+	}
+
 	if o.ForceDelete {
 		return nil
 	}
 
 	formattedNames := names.QuotedList(resourceNames)
 
-	if len(resourceNames) == 0 && o.ParentResource != "" && o.ParentResourceName == "" && !o.DeleteAllNs {
-		return fmt.Errorf("must provide %ss to delete or --%s flag", o.Resource, o.ParentResource)
-	}
-
 	switch {
 	case o.DeleteAllNs:
 		fmt.Fprintf(s.Out, "Are you sure you want to delete all %ss in namespace %q (y/n): ", o.Resource, ns)

pkg/helper/options/delete_test.go

@@ -106,15 +106,13 @@ func TestDeleteOptions(t *testing.T) {
 		{
 			name:           "Error when all defaults specified with ParentResource",
 			opt:            &DeleteOptions{Resource: "TaskRun", ParentResource: "task", ForceDelete: false, DeleteRelated: false, DeleteAllNs: false},
-			stream:         &cli.Stream{In: strings.NewReader("y"), Out: os.Stdout},
 			resourcesNames: []string{},
 			wantError:      true,
-			want:           "must provide TaskRuns to delete or --task flag",
+			want:           "must provide TaskRun name(s) or use --task flag or --all flag to use delete",
 		},
 		{
 			name:           "Error when resource name provided with DeleteAllNs",
 			opt:            &DeleteOptions{DeleteAllNs: true},
-			stream:         &cli.Stream{In: strings.NewReader("y"), Out: os.Stdout},
 			resourcesNames: []string{"test1"},
 			wantError:      true,
 			want:           "--all flag should not have any arguments or flags specified with it",
@@ -129,11 +127,17 @@ func TestDeleteOptions(t *testing.T) {
 		{
 			name:           "Error when resource name provided with DeleteAll",
 			opt:            &DeleteOptions{DeleteAll: true},
-			stream:         &cli.Stream{In: strings.NewReader("y"), Out: os.Stdout},
 			resourcesNames: []string{"test1"},
 			wantError:      true,
 			want:           "--all flag should not have any arguments or flags specified with it",
 		},
+		{
+			name:           "Error when not specifying resource name or --all flag in non PipelineRun/TaskRun deletion",
+			opt:            &DeleteOptions{Resource: "Condition", ParentResource: "", ParentResourceName: "", DeleteRelated: false, DeleteAllNs: false},
+			resourcesNames: []string{},
+			wantError:      true,
+			want:           "must provide Condition name(s) or use --all flag with delete",
+		},
 	}
 
 	for _, tp := range testParams {