mirror of
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50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testenv
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"sync"
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"syscall"
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)
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var symlinkOnce sync.Once
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var winSymlinkErr error
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func initWinHasSymlink() {
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tmpdir, err := ioutil.TempDir("", "symtest")
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if err != nil {
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panic("failed to create temp directory: " + err.Error())
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}
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defer os.RemoveAll(tmpdir)
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err = os.Symlink("target", filepath.Join(tmpdir, "symlink"))
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if err != nil {
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err = err.(*os.LinkError).Err
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switch err {
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case syscall.EWINDOWS, syscall.ERROR_PRIVILEGE_NOT_HELD:
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winSymlinkErr = err
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}
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}
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os.Remove("target")
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}
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func hasSymlink() (ok bool, reason string) {
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symlinkOnce.Do(initWinHasSymlink)
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switch winSymlinkErr {
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case nil:
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return true, ""
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case syscall.EWINDOWS:
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return false, ": symlinks are not supported on your version of Windows"
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case syscall.ERROR_PRIVILEGE_NOT_HELD:
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return false, ": you don't have enough privileges to create symlinks"
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}
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return false, ""
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}
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