Getting Started with the MAC environment go language HelloWorld

1. Installing mercurial

Mercurial is a lightweight distributed version control system implemented in Python language

You can enter the HG command to query whether the system is installed mercurial, you can install the following two kinds of commands

$sudo pip Install mercurial

After the installation is successful

$sudo Easy-install Mercurial

After installation, enter the HG command, shown below, indicating a successful installation of 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 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 pulling 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

If the command installation fails, you can download the installation directly.

2. Get Go Source code

$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

The go directory is created in the current path

3. Install Go

Go to the Go Source (GO/SRC) directory to install, execute the following command

$./all.bash

Finally, the following will be displayed

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. Writing HelloWorld

$ cat Helloworld.go

Package Main

Import (

"FMT"

)

Func Main () {

Fmt. Println ("Hello World")

}

5. Running the program

$ go Run helloworld.go

Hello World

Reference links

Getting Started with the MAC environment go language HelloWorld