Added structure for storage information about included tasks

internal/taskfile/included_taskfile.go

@@ -0,0 +1,38 @@
+package taskfile
+
+import "errors"
+
+var (
+	// ErrCantUnmarshalIncludedTaskFile is returned for invalid var YAML.
+	ErrCantUnmarshalIncludedTaskFile = errors.New("task: can't unmarshal included value")
+)
+
+// IncludedTaskFile represents information about included tasksfile
+type IncludedTaskFile struct {
+	Taskfile string
+	Dir      string
+}
+
+// IncludedTaskFiles represents information about included tasksfiles
+type IncludedTaskFiles = map[string]IncludedTaskFile
+
+// UnmarshalYAML implements yaml.Unmarshaler interface
+func (it *IncludedTaskFile) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var str string
+	if err := unmarshal(&str); err == nil {
+		it.Taskfile = str
+		return nil
+	}
+
+	var includedTaskfile struct {
+		Taskfile string
+		Dir      string
+	}
+	if err := unmarshal(&includedTaskfile); err == nil {
+		it.Dir = includedTaskfile.Dir
+		it.Taskfile = includedTaskfile.Taskfile
+		return nil
+	}
+
+	return ErrCantUnmarshalIncludedTaskFile
+}