Mac环境 go语言之入门HelloWorld

1. 安装mercurial

Mercurial 是一种轻量级分布式版本控制系统，采用 Python 语言实现

可以输入hg命令查询系统是否安装mercurial,可以如下两种命令安装

$sudo pip install mercurial

安装成功之后

$sudo easy-install mercurial

安装之后，输入hg命令，如下内容显示，表示成功安装 mercuria

$ hg

Mercurial Distributed SCM

basic commands:

 add           add the specified files on the next commit

 annotate      show changeset information by line for each file

 clone         make a copy of an existing repository

 commit        commit the specified files or all outstanding changes

 diff          diff repository (or selected files)

 export        dump the header and diffs for one or more changesets

 forget        forget the specified files on the next commit

 init          create a new repository in the given directory

 log           show revision history of entire repository or files

 merge         merge working directory with another revision

 pull          pull changes from the specified source

 push          push changes to the specified destination

 remove        remove the specified files on the next commit

 serve         start stand-alone webserver

 status        show changed files in the working directory

 summary       summarize working directory state

 update        update working directory (or switch revisions)

use "hg help" for the full list of commands or "hg -v" for details

如上命令安装失败，可以直接去下载安装

2. 获取go源代码

$hg clone -r release https://go.googlecode.com/hg/ go

warning: go.googlecode.com certificate with fingerprint 3f:8a:ae:12:fc:c2:65:d0:64:42:ee:6f:cc:b3:41:a1:9a:76:6e:8c not verified (check hostfingerprints or web.cacerts config setting)

adding changesets

adding manifests

adding file changes

added 19559 changesets with 68116 changes to 8835 files

updating to branch release-branch.go1.3

4167 files updated, 0 files merged, 0 files removed, 0 files unresolved

会在当前路径创建go目录

3.安装go

进入 go源码（go/src）目录进行安装，执行如下命令

$ ./all.bash

最后会显示出如下内容

ALL TESTS PASSED

---

Installed Go for darwin/amd64 in /Users/angel/iProject/go

Installed commands in /Users/angel/iProject/go/bin

*** You need to add /Users/angel/iProject/go/bin to your PATH.

4.编写HelloWorld

$ cat helloworld.go 

package main

import (

    "fmt"

)

func main(){

    fmt.Println("Hello World")

}

5.运行程序

$ go run helloworld.go 

Hello World

参考 链接

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