Create Go projects with GoLand (with ring GOPATH/GOROOT environment configuration)

1. Download and install Golang development environment

Download address

Golang official website: golang.google.cn/dl/

The version numbers below may not be up to date, but overall the installation tutorial is similar. Go language updates quickly. It is recommended to use the latest version to experience the latest features:

Version selection

You are advised to download the executable file for Windows and Mac platforms, and download the compressed file for Linux.

Run the installation after downloading:

Note: The installation directory can be easily found by yourself.

Run CMD on the PC and enter Go version to check whether the installation is successful.

Under Linux installation

If you do not need to type go code on Linux platform, there is no need to install Go on Linux platform. The GO code written on our development machine only needs cross-platform compilation (see cross-platform compilation at the end of the article), and then you can copy it to run on Linux server. This is also the advantage of easy cross-platform deployment of GO program.

We have selected and downloaded the go1.15.2.linux-amd64.tar.gz file from the version selection page:

$wget HTTP: / / https://dl.google.com/go/go1.15.2.linux-amd64.tar.gzCopy the code

Unzip the downloaded file to /usr/local:

$tar -zxvf go1.15.2.linux-amd64.tar.gz -c /usr/local  # decompression
Copy the code

If no permission is displayed, add sudo as root and run again. After executing, you can see the go directory under /usr/local/.

Configure environment variables: In Linux, you can configure environment variables in two files. /etc/profile takes effect for all users. $HOME/. Profile is valid for the current user. Select a file to open according to your own situation, add the following two lines of code, save and exit.

export GOROOT=/usr/local/go
export PATH=$PATH:$GOROOT/bin
Copy the code

Profile takes effect after you run the source command to load $HOME/. Profile after you modify $HOME/. Check:

$go Version $Go Version go1.15.2 Linux/AMD64Copy the code

2. Configuration GOPATH

3. Create a new Go project using Goland

Create a project:

Create the bin SRC PKG folder

Bin: used to store the compiled.exe file. SRC: Used to store the development files of our project. Create the project and project files in SRC

Create projects and files

Modify runtime configuration information

Run Kind: Selects Directory

Directory: Specifies the project Directory

Out Directory: Specifies the output path of the compiled file

WOrking Directory: Specifies the path of the workspace

The results

package main  // Declare the main package, indicating that it is currently an executable program

import "fmt"  // Import the built-in FMT package

func main(a){  // The main function is the entry point for program execution
	fmt.Println("Hello Golang!")  // 在终端打印 Hello Golang!
}
Copy the code

Matters needing attention:

# main is the entry to the program. Pakage must be main
Copy the code

4. GOPROXY