1// Copyright 2013 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//go:build ignore
6
7// mksyscall_windows wraps golang.org/x/sys/windows/mkwinsyscall.
8package main
9
10import (
11	"bytes"
12	"os"
13	"os/exec"
14	"path/filepath"
15	"runtime"
16)
17
18func main() {
19	goTool := filepath.Join(runtime.GOROOT(), "bin", "go")
20
21	listCmd := exec.Command(goTool, "list", "-m")
22	listCmd.Env = append(os.Environ(), "GO111MODULE=on")
23
24	var (
25		cmdEnv  []string
26		modArgs []string
27	)
28	if out, err := listCmd.Output(); err == nil && string(bytes.TrimSpace(out)) == "std" {
29		// Force module mode to use mkwinsyscall at the same version as the x/sys
30		// module vendored into the standard library.
31		cmdEnv = append(os.Environ(), "GO111MODULE=on")
32
33		// Force -mod=readonly instead of the default -mod=vendor.
34		//
35		// mkwinsyscall is not itself vendored into the standard library, and it is
36		// not feasible to do so at the moment: std-vendored libraries are included
37		// in the "std" meta-pattern (because in general they *are* linked into
38		// users binaries separately from the original import paths), and we can't
39		// allow a binary in the "std" meta-pattern.
40		modArgs = []string{"-mod=readonly"}
41	} else {
42		// Nobody outside the standard library should be using this wrapper: other
43		// modules can vendor in the mkwinsyscall tool directly (as described in
44		// https://golang.org/issue/25922), so they don't need this wrapper to
45		// set module mode and -mod=readonly explicitly.
46		os.Stderr.WriteString("WARNING: Please switch from using:\n    go run $GOROOT/src/syscall/mksyscall_windows.go\nto using:\n    go run golang.org/x/sys/windows/mkwinsyscall\n")
47	}
48
49	args := append([]string{"run"}, modArgs...)
50	args = append(args, "golang.org/x/sys/windows/mkwinsyscall")
51	args = append(args, os.Args[1:]...)
52	cmd := exec.Command(goTool, args...)
53	cmd.Stdout = os.Stdout
54	cmd.Stderr = os.Stderr
55	cmd.Env = cmdEnv
56	err := cmd.Run()
57	if err != nil {
58		os.Exit(1)
59	}
60}
61