serialfile: fix handling of hidden paths on windows

filewriter_test.go

@@ -40,6 +40,9 @@ func TestWriteTo(t *testing.T) {
 		"5/a": "foobar",
 	}
 	err = filepath.Walk(path, func(cpath string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
 		rpath, err := filepath.Rel(path, cpath)
 		if err != nil {
 			return err

is_hidden.go

@@ -1,18 +1,17 @@
-// +build !windows
+//+build !windows
 
 package files
 
 import (
-	"path/filepath"
-	"strings"
+	"os"
 )
 
-func IsHidden(name string, f Node) bool {
-	fName := filepath.Base(name)
-
-	if strings.HasPrefix(fName, ".") && len(fName) > 1 {
-		return true
+func isHidden(fi os.FileInfo) bool {
+	fName := fi.Name()
+	switch fName {
+	case "", ".", "..":
+		return false
+	default:
+		return fName[0] == '.'
 	}
-
-	return false
 }

is_hidden_windows.go

@@ -3,33 +3,26 @@
 package files
 
 import (
-	"path/filepath"
-	"strings"
+	"os"
 
 	windows "golang.org/x/sys/windows"
 )
 
-func IsHidden(name string, f Node) bool {
-
-	fName := filepath.Base(name)
+func isHidden(fi os.FileInfo) bool {
+	fName := fi.Name()
+	switch fName {
+	case "", ".", "..":
+		return false
+	}
 
-	if strings.HasPrefix(fName, ".") && len(fName) > 1 {
+	if fName[0] == '.' {
 		return true
 	}
 
-	fi, ok := f.(FileInfo)
+	wi, ok := fi.Sys().(*windows.Win32FileAttributeData)
 	if !ok {
 		return false
 	}
 
-	p, e := windows.UTF16PtrFromString(fi.AbsPath())
-	if e != nil {
-		return false
-	}
-
-	attrs, e := windows.GetFileAttributes(p)
-	if e != nil {
-		return false
-	}
-	return attrs&windows.FILE_ATTRIBUTE_HIDDEN != 0
+	return wi.FileAttributes&windows.FILE_ATTRIBUTE_HIDDEN != 0
 }

serialfile.go

@@ -75,7 +75,7 @@ func (it *serialIterator) Next() bool {
 
 	stat := it.files[0]
 	it.files = it.files[1:]
-	for !it.handleHiddenFiles && strings.HasPrefix(stat.Name(), ".") {
+	for !it.handleHiddenFiles && isHidden(stat) {
 		if len(it.files) == 0 {
 			return false
 		}

serialfile_test.go

@@ -0,0 +1,126 @@
+package files
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func isPathHidden(p string) bool {
+	return strings.HasPrefix(p, ".") || strings.Contains(p, "/.")
+}
+
+func TestSerialFile(t *testing.T) {
+	t.Run("Hidden", func(t *testing.T) { testSerialFile(t, true) })
+	t.Run("NotHidden", func(t *testing.T) { testSerialFile(t, false) })
+}
+
+func testSerialFile(t *testing.T, hidden bool) {
+	tmppath, err := ioutil.TempDir("", "files-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmppath)
+
+	expected := map[string]string{
+		"1":      "Some text!\n",
+		"2":      "beep",
+		"3":      "",
+		"4":      "boop",
+		"5":      "",
+		"5/a":    "foobar",
+		".6":     "thing",
+		"7":      "",
+		"7/.foo": "bla",
+		".8":     "",
+		".8/foo": "bla",
+	}
+
+	for p, c := range expected {
+		path := filepath.Join(tmppath, p)
+		if c != "" {
+			continue
+		}
+		if err := os.MkdirAll(path, 0777); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	for p, c := range expected {
+		path := filepath.Join(tmppath, p)
+		if c == "" {
+			continue
+		}
+		if err := ioutil.WriteFile(path, []byte(c), 0666); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	stat, err := os.Stat(tmppath)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sf, err := NewSerialFile(tmppath, hidden, stat)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer sf.Close()
+
+	rootFound := false
+	err = Walk(sf, func(path string, nd Node) error {
+		defer nd.Close()
+
+		// root node.
+		if path == "" {
+			if rootFound {
+				return fmt.Errorf("found root twice")
+			}
+			if sf != nd {
+				return fmt.Errorf("wrong root")
+			}
+			rootFound = true
+			return nil
+		}
+
+		if !hidden && isPathHidden(path) {
+			return fmt.Errorf("found a hidden file")
+		}
+
+		data, ok := expected[path]
+		if !ok {
+			return fmt.Errorf("expected something at %q", path)
+		}
+		delete(expected, path)
+
+		switch nd := nd.(type) {
+		case *Symlink:
+			return fmt.Errorf("didn't expect a symlink")
+		case Directory:
+			if data != "" {
+				return fmt.Errorf("expected a directory at %q", path)
+			}
+		case File:
+			actual, err := ioutil.ReadAll(nd)
+			if err != nil {
+				return err
+			}
+			if string(actual) != data {
+				return fmt.Errorf("expected %q, got %q", data, string(actual))
+			}
+		}
+		return nil
+	})
+	if !rootFound {
+		t.Fatal("didn't find the root")
+	}
+	for p := range expected {
+		if !hidden && isPathHidden(p) {
+			continue
+		}
+		t.Errorf("missed %q", p)
+	}
+}

walk.go

@@ -0,0 +1,27 @@
+package files
+
+import (
+	"path/filepath"
+)
+
+// Walk walks a file tree, like `os.Walk`.
+func Walk(nd Node, cb func(fpath string, nd Node) error) error {
+	var helper func(string, Node) error
+	helper = func(path string, nd Node) error {
+		if err := cb(path, nd); err != nil {
+			return err
+		}
+		dir, ok := nd.(Directory)
+		if !ok {
+			return nil
+		}
+		iter := dir.Entries()
+		for iter.Next() {
+			if err := helper(filepath.Join(path, iter.Name()), iter.Node()); err != nil {
+				return err
+			}
+		}
+		return iter.Err()
+	}
+	return helper("", nd)
+}