1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
// Copyright 2011 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 tool implements the ``go tool'' command.
package tool
import (
"context"
"fmt"
exec "internal/execabs"
"os"
"os/signal"
"sort"
"strings"
"cmd/go/internal/base"
"cmd/go/internal/cfg"
)
var CmdTool = &base.Command{
Run: runTool,
UsageLine: "go tool [-n] command [args...]",
Short: "run specified go tool",
Long: `
Tool runs the go tool command identified by the arguments.
With no arguments it prints the list of known tools.
The -n flag causes tool to print the command that would be
executed but not execute it.
For more about each tool command, see 'go doc cmd/<command>'.
`,
}
var toolN bool
// Return whether tool can be expected in the gccgo tool directory.
// Other binaries could be in the same directory so don't
// show those with the 'go tool' command.
func isGccgoTool(tool string) bool {
switch tool {
case "cgo", "fix", "cover", "godoc", "vet":
return true
}
return false
}
func init() {
CmdTool.Flag.BoolVar(&toolN, "n", false, "")
}
func runTool(ctx context.Context, cmd *base.Command, args []string) {
if len(args) == 0 {
listTools()
return
}
toolName := args[0]
// The tool name must be lower-case letters, numbers or underscores.
for _, c := range toolName {
switch {
case 'a' <= c && c <= 'z', '0' <= c && c <= '9', c == '_':
default:
fmt.Fprintf(os.Stderr, "go: bad tool name %q\n", toolName)
base.SetExitStatus(2)
return
}
}
toolPath := base.Tool(toolName)
if toolPath == "" {
return
}
if toolN {
cmd := toolPath
if len(args) > 1 {
cmd += " " + strings.Join(args[1:], " ")
}
fmt.Printf("%s\n", cmd)
return
}
args[0] = toolPath // in case the tool wants to re-exec itself, e.g. cmd/dist
toolCmd := &exec.Cmd{
Path: toolPath,
Args: args,
Stdin: os.Stdin,
Stdout: os.Stdout,
Stderr: os.Stderr,
}
err := toolCmd.Start()
if err == nil {
c := make(chan os.Signal, 100)
signal.Notify(c)
go func() {
for sig := range c {
toolCmd.Process.Signal(sig)
}
}()
err = toolCmd.Wait()
signal.Stop(c)
close(c)
}
if err != nil {
// Only print about the exit status if the command
// didn't even run (not an ExitError) or it didn't exit cleanly
// or we're printing command lines too (-x mode).
// Assume if command exited cleanly (even with non-zero status)
// it printed any messages it wanted to print.
if e, ok := err.(*exec.ExitError); !ok || !e.Exited() || cfg.BuildX {
fmt.Fprintf(os.Stderr, "go tool %s: %s\n", toolName, err)
}
base.SetExitStatus(1)
return
}
}
// listTools prints a list of the available tools in the tools directory.
func listTools() {
f, err := os.Open(base.ToolDir)
if err != nil {
fmt.Fprintf(os.Stderr, "go: no tool directory: %s\n", err)
base.SetExitStatus(2)
return
}
defer f.Close()
names, err := f.Readdirnames(-1)
if err != nil {
fmt.Fprintf(os.Stderr, "go: can't read tool directory: %s\n", err)
base.SetExitStatus(2)
return
}
sort.Strings(names)
for _, name := range names {
// Unify presentation by going to lower case.
name = strings.ToLower(name)
// If it's windows, don't show the .exe suffix.
if base.ToolIsWindows && strings.HasSuffix(name, base.ToolWindowsExtension) {
name = name[:len(name)-len(base.ToolWindowsExtension)]
}
// The tool directory used by gccgo will have other binaries
// in addition to go tools. Only display go tools here.
if cfg.BuildToolchainName == "gccgo" && !isGccgoTool(name) {
continue
}
fmt.Println(name)
}
}
|
