go tool 源码
golang tool 代码
文件路径：/src/cmd/go/internal/base/tool.go
// Copyright 2017 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.
package base
import (
"fmt"
"go/build"
"os"
"path/filepath"
"runtime"
"cmd/go/internal/cfg"
)
// Configuration for finding tool binaries.
var (
ToolGOOS = runtime.GOOS
ToolGOARCH = runtime.GOARCH
ToolIsWindows = ToolGOOS == "windows"
ToolDir = build.ToolDir
)
const ToolWindowsExtension = ".exe"
// Tool returns the path to the named tool (for example, "vet").
// If the tool cannot be found, Tool exits the process.
func Tool(toolName string) string {
toolPath := filepath.Join(ToolDir, toolName)
if ToolIsWindows {
toolPath += ToolWindowsExtension
}
if len(cfg.BuildToolexec) > 0 {
return toolPath
}
// Give a nice message if there is no tool with that name.
if _, err := os.Stat(toolPath); err != nil {
fmt.Fprintf(os.Stderr, "go: no such tool %q\n", toolName)
SetExitStatus(2)
Exit()
}
return toolPath
}
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