feat: node refactor (#1316)

* refactor: node reader interface

* refactor: rewrite Taskfile() as anon recursive func

* chore: NewNodeFromIncludedTaskfile

* chore: changelog

taskfile/read/node.go

@@ -0,0 +1,35 @@
+package read
+
+import (
+	"strings"
+
+	"github.com/go-task/task/v3/taskfile"
+)
+
+type Node interface {
+	Read() (*taskfile.Taskfile, error)
+	Parent() Node
+	Optional() bool
+	Location() string
+}
+
+func NewNodeFromIncludedTaskfile(parent Node, includedTaskfile taskfile.IncludedTaskfile) (Node, error) {
+	switch getScheme(includedTaskfile.Taskfile) {
+	// TODO: Add support for other schemes.
+	// If no other scheme matches, we assume it's a file.
+	// This also allows users to explicitly set a file:// scheme.
+	default:
+		path, err := includedTaskfile.FullTaskfilePath()
+		if err != nil {
+			return nil, err
+		}
+		return NewFileNode(parent, path, includedTaskfile.Optional)
+	}
+}
+
+func getScheme(uri string) string {
+	if i := strings.Index(uri, "://"); i != -1 {
+		return uri[:i]
+	}
+	return ""
+}