GO Configuration

installation

apt installation
- apt update && apt install -y golang
- Uninstall using the apt remove command, then use apt autoremove remove dependencies
- Note that this method can only install version 1.6. For later (such as the need context Pack), install in accordance with the second approach
Installation package
- Download the installation package
  - wget https://golang.org/dl/go1.12.3.linux-amd64.tar.gz
  - If you can use the URL in the country https://golang.google.cn/dl/go1.12.3.linux-amd64.tar.gz
- Unzip to your desired folder
  - tar -C /usr/local -xzf go1.10.3.linux-amd64.tar.gz
If the downloaded version 1.13 and above can change the default proxy
- You do not have to download plug-back manually installed
- GOPRIVATE can set up a private library in the organization

# vim ～/.profile
export GOPROXY="https://goproxy.cn,direct"
export GOPRIVATE="*.xxx.org"
export GOSUMDB="golang.google.cn"

# source ~/.profile

Multi-Versioning

Quick to install and manage multiple versions of the following script golang
- You need to /usr/localcreate a directory go-dirand go-tartwo directories
- If you need it in Linux darwin into linux

BigVersion=$1
SmallVersion=$2

RootPath=/usr/local
DirPath=/usr/local/go-dir/go-${BigVersion}-${SmallVersion}
TarFile=go1.${BigVersion}.${SmallVersion}.darwin-amd64.tar.gz

wget  https://golang.google.cn/dl/${TarFile}
mkdir -p ${DirPath}
tar -C ${DirPath} -xzf ${TarFile}
cd ${RootPath}; rm go
ln -s ${DirPath}/go/ ${RootPath}/go

Configuration environment variable

Here Insert Picture Description

/ etc / profile file the entry into force of the entire computer
~ / .profile or ~. / bash_profile file for the user to take effect
If you use zsh, then it was loaded in the / etc / zsh / zshrc file

# apt安装的不用配置该项
export GOROOT=/usr/local/go
export PATH=$PATH:$GOROOT/bin

# 这个是你自己的开发目录
# 可以同时存在多个开发目录，用：连接
export GOPATH=$HOME/vscode/go-config
export GOBIN=$GOPATH/bin
export PATH=$PATH:$GOBIN

# 如果原先有老得go环境变量，还要删除
export PATH=${PATH#/*/tiger/go/go/bin}

By configuring the effective
- source /etc/profile orsource ~/.profile

Plug (vscode)

Download the version prior to 1.11 due to the need to manually install wall
- Manually download the source code from GitHub to github.com/golang directory
  - git clone https://github.com/golang/tools.git tools
- A copy of the directory to golang.org/x/
- golint mounted to the upper end require a single directory
  - git clone https://github.com/golang/lint
- Manually go install all plug-ins
reference
- https://abelsu7.top/2018/12/28/go-vscode-plugin/
- https://blog.csdn.net/qq_23306647/article/details/96509135

GO built-in command

Command List

	build       compile packages and dependencies
	clean       remove object files
	doc         show documentation for package or symbol
	env         print Go environment information
	bug         start a bug report
	fix         run go tool fix on packages
	fmt         run gofmt on package sources
	generate    generate Go files by processing source
	get         download and install packages and dependencies
	install     compile and install packages and dependencies
	list        list packages
	run         compile and run Go program
	test        test packages
	tool        run specified go tool
	version     print Go version
	vet         run go tool vet on packages

go build

If the target has a main bag package, it will generate a binary file
- If there is no main package, build instructions can only be used by the compiler to check whether, after compilation package will drop all temporary objects generated at compile time
The default scope is the current folder, you can also specify a directory compiled
- ...All matches
  - go build flysnow.org/tools/...All packages in the compilation tools directory
Generates a binary file in the current directory
- Use the -o parameter to explicitly specify the path and file name
- raceOpen competition assay parameters
Cross-platform compilation
- GOOS=linux GOARCH=amd64 go build packageName

go clean

Delete compiled files

go install

Steps to compile and install the file, which installed more than build a
Do not specify the default package for the installation of the current package
Installed or under bin pkg directory
- Package file containing main (executable file) is mounted to the $GOPATH/bindirectory
- Normal package file (file generation .a) mounted to the $GOPATH/pkg/$GOOS/directory
When there are multiple GOPATH directory, only the first valid directory

go run

Compile and execute programs that do not generate the file
File must contain the main function as a parameter

go get

Remote Access Code package and install
- The source code is downloaded to $GOPATH/srcthe directory
-v display process
-u update with the network
-d Download only, do not install
go get automatically detect and install all dependencies
- To get all the dependencies of a project, do not use git clone, go get used