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resolve symbolic links when loading develop.watch.path
Signed-off-by: Joana Hrotko <joana.hrotko@docker.com>
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Original file line number | Diff line number | Diff line change |
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package utils | ||
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import ( | ||
"os" | ||
"path/filepath" | ||
"strings" | ||
) | ||
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// ResolveSymbolicLink converts the section of an absolute path if it is a | ||
// symbolic link | ||
// | ||
// Parameters: | ||
// - path: an absolute path | ||
// | ||
// Returns: | ||
// - converted path if it has a symbolic link or the same path if there is | ||
// no symbolic link | ||
func ResolveSymbolicLink(path string) (string, error) { | ||
sym, part, err := getSymbolinkLink(path) | ||
if err != nil { | ||
return "", err | ||
} | ||
if sym == "" && part == "" { | ||
// no symbolic link detected | ||
return path, nil | ||
} | ||
return strings.Replace(path, part, sym, 1), nil | ||
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} | ||
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// getSymbolinkLink parses all parts of the path and returns the | ||
// | ||
// Parameters: | ||
// - path: an absolute path | ||
// | ||
// Returns: | ||
// - string section of the path that is a symbolic link | ||
// - string correspondent path section of the symbolic link | ||
// - An error | ||
func getSymbolinkLink(path string) (string, string, error) { | ||
parts := strings.Split(path, string(os.PathSeparator)) | ||
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// Reconstruct the path step by step, checking each component | ||
var currentPath string | ||
if filepath.IsAbs(path) { | ||
currentPath = string(os.PathSeparator) | ||
} | ||
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for _, part := range parts { | ||
if part == "" { | ||
continue | ||
} | ||
currentPath = filepath.Join(currentPath, part) | ||
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if isSymLink := isSymbolicLink(currentPath); isSymLink { | ||
// return symbolic link, and correspondent part | ||
target, err := filepath.EvalSymlinks(currentPath) | ||
if err != nil { | ||
return "", "", err | ||
} | ||
return target, currentPath, nil | ||
} | ||
} | ||
return "", "", nil // no symbolic link | ||
} | ||
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// isSymbolicLink validates if the path is a symbolic link | ||
func isSymbolicLink(path string) bool { | ||
info, err := os.Lstat(path) | ||
if err != nil { | ||
return false | ||
} | ||
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// Check if the file mode indicates a symbolic link | ||
return info.Mode()&os.ModeSymlink != 0 | ||
} |