github.com/flyinox/gosm@v0.0.0-20171117061539-16768cb62077/src/cmd/go/internal/base/tool.go (about)

     1  // Copyright 2017 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  package base
     6  
     7  import (
     8  	"fmt"
     9  	"go/build"
    10  	"os"
    11  	"path/filepath"
    12  	"runtime"
    13  
    14  	"cmd/go/internal/cfg"
    15  )
    16  
    17  // Configuration for finding tool binaries.
    18  var (
    19  	ToolGOOS      = runtime.GOOS
    20  	ToolGOARCH    = runtime.GOARCH
    21  	ToolIsWindows = ToolGOOS == "windows"
    22  	ToolDir       = build.ToolDir
    23  )
    24  
    25  const ToolWindowsExtension = ".exe"
    26  
    27  // Tool returns the path to the named tool (for example, "vet").
    28  // If the tool cannot be found, Tool exits the process.
    29  func Tool(toolName string) string {
    30  	toolPath := filepath.Join(ToolDir, toolName)
    31  	if ToolIsWindows {
    32  		toolPath += ToolWindowsExtension
    33  	}
    34  	if len(cfg.BuildToolexec) > 0 {
    35  		return toolPath
    36  	}
    37  	// Give a nice message if there is no tool with that name.
    38  	if _, err := os.Stat(toolPath); err != nil {
    39  		if isInGoToolsRepo(toolName) {
    40  			fmt.Fprintf(os.Stderr, "go tool: no such tool %q; to install:\n\tgo get golang.org/x/tools/cmd/%s\n", toolName, toolName)
    41  		} else {
    42  			fmt.Fprintf(os.Stderr, "go tool: no such tool %q\n", toolName)
    43  		}
    44  		SetExitStatus(2)
    45  		Exit()
    46  	}
    47  	return toolPath
    48  }
    49  
    50  // TODO: Delete.
    51  func isInGoToolsRepo(toolName string) bool {
    52  	return false
    53  }