1 files changed, 60 insertions, 0 deletions
diff --git a/src/syscall/mksyscall_windows.go b/src/syscall/mksyscall_windows.go
new file mode 100644
index 0000000..240254b
--- /dev/null
+++ b/src/syscall/mksyscall_windows.go
@@ -0,0 +1,60 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// mksyscall_windows wraps golang.org/x/sys/windows/mkwinsyscall.
+package main
+
+import (
+	"bytes"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+)
+
+func main() {
+	goTool := filepath.Join(runtime.GOROOT(), "bin", "go")
+
+	listCmd := exec.Command(goTool, "list", "-m")
+	listCmd.Env = append(os.Environ(), "GO111MODULE=on")
+
+	var (
+		cmdEnv  []string
+		modArgs []string
+	)
+	if out, err := listCmd.Output(); err == nil && string(bytes.TrimSpace(out)) == "std" {
+		// Force module mode to use mkwinsyscall at the same version as the x/sys
+		// module vendored into the standard library.
+		cmdEnv = append(os.Environ(), "GO111MODULE=on")
+
+		// Force -mod=readonly instead of the default -mod=vendor.
+		//
+		// mkwinsyscall is not itself vendored into the standard library, and it is
+		// not feasible to do so at the moment: std-vendored libraries are included
+		// in the "std" meta-pattern (because in general they *are* linked into
+		// users binaries separately from the original import paths), and we can't
+		// allow a binary in the "std" meta-pattern.
+		modArgs = []string{"-mod=readonly"}
+	} else {
+		// Nobody outside the standard library should be using this wrapper: other
+		// modules can vendor in the mkwinsyscall tool directly (as described in
+		// https://golang.org/issue/25922), so they don't need this wrapper to
+		// set module mode and -mod=readonly explicitly.
+		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")
+	}
+
+	args := append([]string{"run"}, modArgs...)
+	args = append(args, "golang.org/x/sys/windows/mkwinsyscall")
+	args = append(args, os.Args[1:]...)
+	cmd := exec.Command(goTool, args...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Env = cmdEnv
+	err := cmd.Run()
+	if err != nil {
+		os.Exit(1)
+	}
+}