github.com/kaydxh/golang@v0.0.131/go/path/filepath/path.go (about)

     1  /*
     2   *Copyright (c) 2022, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package filepath
    23  
    24  import (
    25  	"path"
    26  	"path/filepath"
    27  )
    28  
    29  func GetParentRelPath(filePath string) string {
    30  	fileName := path.Base(filePath)
    31  	parentDir := GetParentRelDir(filePath)
    32  	return filepath.Join(parentDir, fileName)
    33  }
    34  
    35  func GetParentRelDir(filePath string) string {
    36  	dir := path.Dir(filePath)
    37  	return path.Base(dir)
    38  }
    39  
    40  func LastChar(str string) uint8 {
    41  	if str == "" {
    42  		// char '0' means dec 48, 0 means null
    43  		return 0
    44  	}
    45  
    46  	return str[len(str)-1]
    47  }
    48  
    49  // join paths, keep relativePath suffix
    50  func JoinPaths(rootPath, relativePath string) (string, error) {
    51  	absolutePath, err := filepath.Abs(rootPath)
    52  	if err != nil {
    53  		return "", err
    54  	}
    55  
    56  	if relativePath == "" {
    57  		return absolutePath, nil
    58  	}
    59  
    60  	finalPath := path.Join(absolutePath, relativePath)
    61  	if LastChar(relativePath) == '/' && LastChar(finalPath) != '/' {
    62  		return finalPath + "/", nil
    63  	}
    64  
    65  	return finalPath, nil
    66  }
    67  
    68  // CanonicalizePath turns path into an absolute path without symlinks.
    69  func CanonicalizePath(path string) (string, error) {
    70  	path, err := filepath.Abs(path)
    71  	if err != nil {
    72  		return "", err
    73  	}
    74  	activepath, err := filepath.EvalSymlinks(path)
    75  	if err == nil {
    76  		return activepath, nil
    77  	}
    78  
    79  	/*
    80  		// Get a better error if we have an invalid path
    81  		if pathErr, ok := err.(*os.PathError); ok {
    82  			err = errors.Wrap(pathErr.Err, pathErr.Path)
    83  		}
    84  	*/
    85  
    86  	return path, nil
    87  }