介绍一些有助于写出更好Go程序的工具

/*
golint 例子

Author: xcl
Date: 2015-11-22

*/

package main

import (
"fmt"
)

const fooId = "blah"

var var_name int

type hidden struct{}

func Exported() hidden {
return hidden{}
}

type T struct{}

func main() {
Exported()
}

/*
E:\GOtest\testing\testlint>golint -h
Usage of golint:
golint [flags] # runs on package in current directory
golint [flags] package
golint [flags] directory
golint [flags] files... # must be a single package
Flags:
-min_confidence float
minimum confidence of a problem to print it (default 0.8)

E:\GOtest\testing\testlint>dir
驱动器 E 中的卷是 doc
卷的序列号是 0E3D-2A1F

E:\GOtest\testing\testlint 的目录

2015/11/22  21:00    <DIR>          .
2015/11/22  21:00    <DIR>          ..
2015/11/22  20:57         6,448,128 golint.exe
2015/11/22  21:41             1,066 main.go
2 个文件      6,449,194 字节
2 个目录 15,122,874,368 可用字节

E:\GOtest\testing\testlint>golint main.go
main.go:15:7: const fooId should be fooID
main.go:17:5: don't use underscores in Go names; var var_name should be varName
main.go:21:1: exported function Exported should have comment or be unexported
main.go:21:17: exported func Exported returns unexported type main.hidden, which can be annoying to use
main.go:25:6: exported type T should have comment or be unexported

E:\GOtest\testing\testlint>

*/

/*
go vet 例子

go doc cmd/vet

Author: xcl
Date: 2015-11-22

*/

package main

import (
"fmt"
)

func main() {
var c string
fmt.Sprintf("xxx s", c)
}

/*

E:\GOtest\testing\testvet>dir
驱动器 E 中的卷是 doc
卷的序列号是 0E3D-2A1F

E:\GOtest\testing\testvet 的目录

2015/11/22  21:47    <DIR>          .
2015/11/22  21:47    <DIR>          ..
2015/11/22  21:47                98 main.go
1 个文件             98 字节
2 个目录 15,122,874,368 可用字节

E:\GOtest\testing\testvet>go vet
main.go:9: result of fmt.Sprintf call not used
main.go:9: no formatting directive in Sprintf call
exit status 1
*/

/*
race例子

go run -race trace.go

Author: xcl
Date: 2015-11-22
*/

package main

import (
"time"
)

var (
g int
)

func main() {

go func() {
g++
}()

go func() {
g = g + 2
}()

time.Sleep(1 * time.Second)

}

/*

E:\GOtest\testing\testvet>go run trace.go

E:\GOtest\testing\testvet>go run -race trace.go
==================
WARNING: DATA RACE
Write by goroutine 6:
main.main.func2()
E:/GOtest/testing/testvet/trace.go:27 +0x37

Previous write by goroutine 5:
main.main.func1()
E:/GOtest/testing/testvet/trace.go:23 +0x53

Goroutine 6 (running) created at:
main.main()
E:/GOtest/testing/testvet/trace.go:28 +0x57

Goroutine 5 (finished) created at:
main.main()
E:/GOtest/testing/testvet/trace.go:24 +0x3f
==================
Found 1 data race(s)
exit status 66

E:\GOtest\testing\testvet>
*/