Add StatDir and replace com.StatDir (#14099)

* Add StatDir and replace com.StatDir

* a nit

* Remove wrong file

Co-authored-by: 6543 <6543@obermui.de>

modules/util/path.go

@@ -5,8 +5,11 @@
 package util
 
 import (
+	"errors"
 	"os"
+	"path"
 	"path/filepath"
+	"strings"
 )
 
 // EnsureAbsolutePath ensure that a path is absolute, making it
@@ -70,3 +73,80 @@ func IsExist(path string) (bool, error) {
 	}
 	return false, err
 }
+
+func statDir(dirPath, recPath string, includeDir, isDirOnly, followSymlinks bool) ([]string, error) {
+	dir, err := os.Open(dirPath)
+	if err != nil {
+		return nil, err
+	}
+	defer dir.Close()
+
+	fis, err := dir.Readdir(0)
+	if err != nil {
+		return nil, err
+	}
+
+	statList := make([]string, 0)
+	for _, fi := range fis {
+		if strings.Contains(fi.Name(), ".DS_Store") {
+			continue
+		}
+
+		relPath := path.Join(recPath, fi.Name())
+		curPath := path.Join(dirPath, fi.Name())
+		if fi.IsDir() {
+			if includeDir {
+				statList = append(statList, relPath+"/")
+			}
+			s, err := statDir(curPath, relPath, includeDir, isDirOnly, followSymlinks)
+			if err != nil {
+				return nil, err
+			}
+			statList = append(statList, s...)
+		} else if !isDirOnly {
+			statList = append(statList, relPath)
+		} else if followSymlinks && fi.Mode()&os.ModeSymlink != 0 {
+			link, err := os.Readlink(curPath)
+			if err != nil {
+				return nil, err
+			}
+
+			isDir, err := IsDir(link)
+			if err != nil {
+				return nil, err
+			}
+			if isDir {
+				if includeDir {
+					statList = append(statList, relPath+"/")
+				}
+				s, err := statDir(curPath, relPath, includeDir, isDirOnly, followSymlinks)
+				if err != nil {
+					return nil, err
+				}
+				statList = append(statList, s...)
+			}
+		}
+	}
+	return statList, nil
+}
+
+// StatDir gathers information of given directory by depth-first.
+// It returns slice of file list and includes subdirectories if enabled;
+// it returns error and nil slice when error occurs in underlying functions,
+// or given path is not a directory or does not exist.
+//
+// Slice does not include given path itself.
+// If subdirectories is enabled, they will have suffix '/'.
+func StatDir(rootPath string, includeDir ...bool) ([]string, error) {
+	if isDir, err := IsDir(rootPath); err != nil {
+		return nil, err
+	} else if !isDir {
+		return nil, errors.New("not a directory or does not exist: " + rootPath)
+	}
+
+	isIncludeDir := false
+	if len(includeDir) != 0 {
+		isIncludeDir = includeDir[0]
+	}
+	return statDir(rootPath, "", isIncludeDir, false, false)
+}