Mac周边环境 goBASIC语言HelloWorld

1. 安装mercurial

Mercurial 是一种轻量级分布式版本号控制系统，採用 Python 语言实现

能够输入hg命令查询系统是否安装mercurial,能够例如以下两种命令安装

$sudo pip install mercurial

成功安装之后

$sudo easy-install mercurial

安装之后。输入hg命令。例如以下内容显示，表示安装成功 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。能够直接去下载安装

2. 获取go源码

$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文件夹

3.安装go

进入 go源代码（go/src）文件夹进行安装，运行例如以下命令

$ ./all.bash

最后会显示出例如以下内容

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.执行程序

$ go run helloworld.go

Hello World

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