memfs: export the NewNode function

The implication for exporting NewNode function is the parent parameter
can be nil, and if its nil the SysPath and Path will be derived from
FileInfo.Name().

The reason for exporting this function is to allow creating independent
node from FileInfo.

2 files changed, 17 insertions, 6 deletions

diff --git a/lib/memfs/memfs.go b/lib/memfs/memfs.go
index b2754ad6..cb196a6f 100644
--- a/lib/memfs/memfs.go
+++ b/lib/memfs/memfs.go
@@ -302,7 +302,7 @@ func (mfs *MemFS) AddChild(parent *Node, fi os.FileInfo) (*Node, error) {
 		return nil, nil
 	}
 
-	child, err := newNode(parent, fi, mfs.withContent)
+	child, err := NewNode(parent, fi, mfs.withContent)
 	if err != nil {
 		return nil, err
 	}
diff --git a/lib/memfs/node.go b/lib/memfs/node.go
index caad37c2..c4b7d1c2 100644
--- a/lib/memfs/node.go
+++ b/lib/memfs/node.go
@@ -32,20 +32,31 @@ type Node struct {
 }
 
 //
-// newNode create a new node based on file information "fi".
+// NewNode create a new node based on file information "fi".
 // If withContent is true, the file content and its type will be saved in
 // node as V and ContentType.
 //
-func newNode(parent *Node, fi os.FileInfo, withContent bool) (node *Node, err error) {
-	if parent == nil || fi == nil {
+func NewNode(parent *Node, fi os.FileInfo, withContent bool) (node *Node, err error) {
+	if fi == nil {
 		return nil, nil
 	}
 
-	sysPath := filepath.Join(parent.SysPath, fi.Name())
+	var (
+		sysPath string
+		absPath string
+	)
+
+	if parent != nil {
+		sysPath = filepath.Join(parent.SysPath, fi.Name())
+		absPath = path.Join(parent.Path, fi.Name())
+	} else {
+		sysPath = fi.Name()
+		absPath = fi.Name()
+	}
 
 	node = &Node{
 		SysPath: sysPath,
-		Path:    path.Join(parent.Path, fi.Name()),
+		Path:    absPath,
 		Name:    fi.Name(),
 		ModTime: fi.ModTime(),
 		Mode:    fi.Mode(),