fix: reject include without taskfile or dir

task_test.go

@@ -1082,6 +1082,25 @@ func TestIncludesIncorrect(t *testing.T) {
 	assert.Contains(t, err.Error(), "Failed to parse testdata/includes_incorrect/incomplete.yml:", err.Error())
 }
 
+func TestIncludesMissingTaskfile(t *testing.T) {
+	t.Parallel()
+
+	const dir = "testdata/includes_missing_taskfile"
+
+	var buff bytes.Buffer
+	e := task.NewExecutor(
+		task.WithDir(dir),
+		task.WithStdout(&buff),
+		task.WithStderr(&buff),
+		task.WithSilent(true),
+	)
+
+	err := e.Setup()
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "include must specify taskfile or dir")
+	assert.NotContains(t, err.Error(), "include cycle detected")
+}
+
 func TestIncludesEmptyMain(t *testing.T) {
 	t.Parallel()
 

taskfile/ast/include.go

@@ -2,6 +2,7 @@ package ast
 
 import (
 	"iter"
+	"strings"
 	"sync"
 
 	"github.com/elliotchance/orderedmap/v3"
@@ -171,6 +172,9 @@ func (include *Include) UnmarshalYAML(node *yaml.Node) error {
 		if err := node.Decode(&includedTaskfile); err != nil {
 			return errors.NewTaskfileDecodeError(err, node)
 		}
+		if strings.TrimSpace(includedTaskfile.Taskfile) == "" && strings.TrimSpace(includedTaskfile.Dir) == "" {
+			return errors.NewTaskfileDecodeError(nil, node).WithMessage("include must specify taskfile or dir")
+		}
 		include.Taskfile = includedTaskfile.Taskfile
 		include.Dir = includedTaskfile.Dir
 		include.Optional = includedTaskfile.Optional

testdata/includes_missing_taskfile/Taskfile.yml

@@ -0,0 +1,5 @@
+version: '3'
+
+includes:
+  GOBIN:
+    sh: echo $(go env GOPATH)/bin