Detailed explanation of how to install dependencies in golang

Golang is an efficient, simple, and easy-to-use programming language that is widely used in cloud computing, network programming and other fields. For developers who want to use Golang, installing dependencies is a very important step. This article will introduce you to the method of installing dependencies in Golang.

1. Preparation before installation

Before starting to install Golang, you need to check whether the operating system has installed Git and Mercurial tools. These two tools are dependencies of Golang, through which you can easily download and update some open source library files.

To install Git, you can download the corresponding installation package from the official website https://git-scm.com/downloads for installation.

To install Mercurial, you can download the corresponding installation package from the official website https://www.mercurial-scm.org/downloads for installation.

2. Download and install Golang

The Golang official website provides installation packages for different operating systems such as Windows, Linux, MacOS, etc. You can download the corresponding installation packages according to your own operating system. The download address of the installation package is https://golang.org/dl/. Here we take the Windows system as an example to introduce the installation method.

1. After the installation package is downloaded, run the .exe file and the Golang Setup window will appear.

2. Click the "Next" button to enter the License Agreement page.

3. After reading the License Agreement, click the "I Agree" button.

4. On the Setup Type page, select the "Typical" option.

5. On the Installation Folder page, modify the installation path.

6. On the Golang Components page, choose to install everything including the Go compiler, Go tool chain, Goroot, etc.

7. On the Git for Windows Integration page, choose to install Git Integration and select "Git from the command line and also from 3rd-party software".

8. On the completion page, click "Finish" to complete the installation.

3. Install dependency packages

After installing Golang, we need to install some commonly used dependency packages, such as: net/http, crypto, json, etc. Golang's dependency packages can be easily downloaded and installed through the go get command. First, we need to create three directories, src, pkg, and bin, under the GOPATH path.

1. Open the command line, enter the go env command, and check the GOROOT (Golang SDK installation path) set in the local environment variables, and GOPATH and other environment variables.

2. Create three directories: src, pkg, and bin under the GOPATH directory.

3. Use the go get command to install the specified dependency package. For example, to install the http package, the command is: go get -u github.com/golang/net/http

4. Verify the installation

After completing the installation of dependent packages, we need to verify whether Golang is installed success. You can create a new Golang project, write a Hello World program, and then compile and run it.

1. First, create a project directory named "hello" under the GOPATH path.

2. Then, create a new hello.go file in the project directory and write the following program code.

package main

import "fmt"

func main() {
    fmt.Println("Hello, world!")
}

3. Use the command line to enter the project directory and run the command go run hello.go. The program will be executed and the 'Hello, world!' result will be output.

5. Summary

Through the above steps, we can easily install Golang's dependencies and toolkits. During the installation and use process, we also need to pay attention to the updates and changes in the Golang official website and community in order to better understand and master the use of Golang.

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