testenv_windows.go

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package testenv
     6  
     7  import (
     8  	"errors"
     9  	"os"
    10  	"path/filepath"
    11  	"sync"
    12  	"syscall"
    13  )
    14  
    15  var hasSymlink = sync.OnceValues(func() (bool, string) {
    16  	tmpdir, err := os.MkdirTemp("", "symtest")
    17  	if err != nil {
    18  		panic("failed to create temp directory: " + err.Error())
    19  	}
    20  	defer os.RemoveAll(tmpdir)
    21  
    22  	err = os.Symlink("target", filepath.Join(tmpdir, "symlink"))
    23  	switch {
    24  	case err == nil:
    25  		return true, ""
    26  	case errors.Is(err, syscall.EWINDOWS):
    27  		return false, ": symlinks are not supported on your version of Windows"
    28  	case errors.Is(err, syscall.ERROR_PRIVILEGE_NOT_HELD):
    29  		return false, ": you don't have enough privileges to create symlinks"
    30  	}
    31  	return false, ""
    32  })
    33
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