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// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package utils
import (
"errors"
"os"
"os/user"
"path/filepath"
"strings"
)
// PathExists returns whether the given file or directory exists or not
func PathExists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil {
return true, nil
}
if os.IsNotExist(err) {
return false, nil
}
return true, err
}
// FileExist returns whether the given file exists or not
func FileExist(fileName string) (bool, error) {
return exists(fileName, false)
}
// DirExists returns whether the given file exists or not
func DirExists(path string) (bool, error) {
return exists(path, true)
}
func exists(path string, expectDir bool) (bool, error) {
f, err := os.Stat(path)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return false, nil
} else if err.(*os.PathError).Err.Error() == "not a directory" {
// some middle segment of path is a file, cannot traverse
// FIXME: catches error on linux; go does not provide a way to catch this properly..
return false, nil
}
return false, err
}
isDir := f.IsDir()
if isDir && !expectDir {
return false, errors.New("A directory with the same name exists")
} else if !isDir && expectDir {
return false, errors.New("A file with the same name exists")
}
return true, nil
}
// AbsPathWithExpansion expand path beginning with "~/" to absolute path
func AbsPathWithExpansion(p string) (string, error) {
u, err := user.Current()
if err != nil {
return "", err
}
if p == "~" {
return u.HomeDir, nil
} else if strings.HasPrefix(p, "~/") {
return filepath.Join(u.HomeDir, p[2:]), nil
} else {
return filepath.Abs(p)
}
}
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