tailscale/drive/driveimpl/shared/pathutil.go

62 lines
1.6 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package shared
import (
"net/url"
"path"
"strings"
)
// This file provides utility functions for working with URL paths. These are
// similar to functions in package path in the standard library, but differ in
// ways that are documented on the relevant functions.
const (
sepString = "/"
sepStringAndDot = "/."
sep = '/'
)
// CleanAndSplit cleans the provided path p and splits it into its constituent
// parts. This is different from path.Split which just splits a path into prefix
// and suffix.
func CleanAndSplit(p string) []string {
return strings.Split(strings.Trim(path.Clean(p), sepStringAndDot), sepString)
}
// Join behaves like path.Join() but also includes a leading slash.
func Join(parts ...string) string {
fullParts := make([]string, 0, len(parts))
fullParts = append(fullParts, sepString)
for _, part := range parts {
fullParts = append(fullParts, part)
}
return path.Join(fullParts...)
}
// JoinEscaped is like Join but path escapes each part.
func JoinEscaped(parts ...string) string {
fullParts := make([]string, 0, len(parts))
fullParts = append(fullParts, sepString)
for _, part := range parts {
fullParts = append(fullParts, url.PathEscape(part))
}
return path.Join(fullParts...)
}
// IsRoot determines whether a given path p is the root path, defined as either
// empty or "/".
func IsRoot(p string) bool {
return p == "" || p == sepString
}
// Base is like path.Base except that it returns "" for the root folder
func Base(p string) string {
if IsRoot(p) {
return ""
}
return path.Base(p)
}