Mac環境 go語言之入門HelloWorld

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

1. 安裝mercurial

Mercurial 是一種輕量級分布式版本控制系統，採用 Python 語言實現

可以輸入hg命令查詢系統是否安裝mercurial,可以如下兩種命令安裝

$sudo pip install mercurial

安裝成功之後

$sudo easy-install mercurial

安裝之後，輸入hg命令，如下內容顯示，表示成功安裝 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

如上命令安裝失敗，可以直接去下載安裝

2. 擷取go原始碼

$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

會在當前路徑建立go目錄

3.安裝go

進入 go源碼（go/src）目錄進行安裝，執行如下命令

$ ./all.bash

最後會顯示出如下內容

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.編寫HelloWorld

$ cat helloworld.go 

package main

import (

    "fmt"

)

func main(){

    fmt.Println("Hello World")

}

5.運行程式

$ go run helloworld.go 

Hello World

參考 連結