90 lines
1.8 KiB
Go
90 lines
1.8 KiB
Go
package fs
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
)
|
|
|
|
// FileName returns the file path for a sidecar file with the specified extension.
|
|
func FileName(fileName, dirName, baseDir, fileExt string) (string, error) {
|
|
if fileName == "" {
|
|
return "", fmt.Errorf("file name is empty")
|
|
} else if fileExt == "" {
|
|
return "", fmt.Errorf("file extension is empty")
|
|
}
|
|
|
|
dir := filepath.Dir(fileName)
|
|
|
|
if dirName == "" || dirName == "." {
|
|
dirName = dir
|
|
} else if dir != dirName {
|
|
if filepath.IsAbs(dirName) {
|
|
dirName = filepath.Join(dirName, RelName(dir, baseDir))
|
|
} else {
|
|
dirName = filepath.Join(dir, dirName)
|
|
}
|
|
}
|
|
|
|
// Create parent directories if they do not exist yet.
|
|
if err := MkdirAll(dirName); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
// Compose and return file path.
|
|
result := filepath.Join(dirName, filepath.Base(fileName)) + fileExt
|
|
|
|
return result, nil
|
|
}
|
|
|
|
// RelName returns the file name relative to a directory.
|
|
func RelName(fileName, dir string) string {
|
|
if fileName == dir {
|
|
return ""
|
|
}
|
|
|
|
if dir == "" {
|
|
return fileName
|
|
}
|
|
|
|
if i := strings.Index(fileName, dir); i == 0 {
|
|
if i = strings.LastIndex(dir, string(os.PathSeparator)); i == len(dir)-1 {
|
|
pos := len(dir)
|
|
return fileName[pos:]
|
|
} else if i = strings.LastIndex(dir, string(os.PathSeparator)); i != len(dir) {
|
|
pos := len(dir) + 1
|
|
return fileName[pos:]
|
|
}
|
|
}
|
|
|
|
return fileName
|
|
}
|
|
|
|
// FileNameHidden tests is a file name belongs to a hidden file.
|
|
func FileNameHidden(name string) bool {
|
|
if len(name) == 0 {
|
|
return false
|
|
}
|
|
|
|
name = filepath.Base(name)
|
|
|
|
// Hidden files and folders starting with "." or "@" should be ignored.
|
|
switch name[0:1] {
|
|
case ".", "@":
|
|
return true
|
|
}
|
|
|
|
if len(name) == 1 {
|
|
return false
|
|
}
|
|
|
|
// File paths starting with _. and __ like __MACOSX should be ignored.
|
|
switch name[0:2] {
|
|
case "_.", "__":
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|