mirror of https://github.com/k3s-io/k3s
80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
// Copyright 2019 The Kubernetes Authors.
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
package filesys
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"path/filepath"
|
|
"strings"
|
|
)
|
|
|
|
// ConfirmedDir is a clean, absolute, delinkified path
|
|
// that was confirmed to point to an existing directory.
|
|
type ConfirmedDir string
|
|
|
|
// NewTmpConfirmedDir returns a temporary dir, else error.
|
|
// The directory is cleaned, no symlinks, etc. so it's
|
|
// returned as a ConfirmedDir.
|
|
func NewTmpConfirmedDir() (ConfirmedDir, error) {
|
|
n, err := ioutil.TempDir("", "kustomize-")
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
// In MacOs `ioutil.TempDir` creates a directory
|
|
// with root in the `/var` folder, which is in turn
|
|
// a symlinked path to `/private/var`.
|
|
// Function `filepath.EvalSymlinks`is used to
|
|
// resolve the real absolute path.
|
|
deLinked, err := filepath.EvalSymlinks(n)
|
|
return ConfirmedDir(deLinked), err
|
|
}
|
|
|
|
// HasPrefix returns true if the directory argument
|
|
// is a prefix of self (d) from the point of view of
|
|
// a file system.
|
|
//
|
|
// I.e., it's true if the argument equals or contains
|
|
// self (d) in a file path sense.
|
|
//
|
|
// HasPrefix emulates the semantics of strings.HasPrefix
|
|
// such that the following are true:
|
|
//
|
|
// strings.HasPrefix("foobar", "foobar")
|
|
// strings.HasPrefix("foobar", "foo")
|
|
// strings.HasPrefix("foobar", "")
|
|
//
|
|
// d := fSys.ConfirmDir("/foo/bar")
|
|
// d.HasPrefix("/foo/bar")
|
|
// d.HasPrefix("/foo")
|
|
// d.HasPrefix("/")
|
|
//
|
|
// Not contacting a file system here to check for
|
|
// actual path existence.
|
|
//
|
|
// This is tested on linux, but will have trouble
|
|
// on other operating systems.
|
|
// TODO(monopole) Refactor when #golang/go/18358 closes.
|
|
// See also:
|
|
// https://github.com/golang/go/issues/18358
|
|
// https://github.com/golang/dep/issues/296
|
|
// https://github.com/golang/dep/blob/master/internal/fs/fs.go#L33
|
|
// https://codereview.appspot.com/5712045
|
|
func (d ConfirmedDir) HasPrefix(path ConfirmedDir) bool {
|
|
if path.String() == string(filepath.Separator) || path == d {
|
|
return true
|
|
}
|
|
return strings.HasPrefix(
|
|
string(d),
|
|
string(path)+string(filepath.Separator))
|
|
}
|
|
|
|
func (d ConfirmedDir) Join(path string) string {
|
|
return filepath.Join(string(d), path)
|
|
}
|
|
|
|
func (d ConfirmedDir) String() string {
|
|
return string(d)
|
|
}
|