mksyscall_windows.go

     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.
     8  package main
     9  
    10  import (
    11  	"bytes"
    12  	"os"
    13  	"os/exec"
    14  	"path/filepath"
    15  	"runtime"
    16  )
    17  
    18  func 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
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