github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/syscall/mksyscall_windows.go (about)

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