Go language code formatting tool: Detailed explanation of GoFmt command

GoFmt, the official formatting tool of the Go language, implements the formatting standards of the Go programming style guide, automatically organizes indentation, line width, brackets and semicolons to maintain code uniformity and readability. Installation: go install golang.org/x/tools/cmd/goimports; go install golang.org/x/tools/cmd/gofmt. Use: gofmt -w your_code.go. Options: -d only shows diffs; -l only inspects code; -r recursively formats all Go files in the directory.

Detailed explanation of GoFmt command: Go language code formatting tool

Introduction

GoFmt is a code formatting tool officially provided by the Go language, which is used to enforce the code format defined in the Go programming style guide. It can automatically organize code indentation, line width, brackets and semicolons, etc., thereby helping to maintain code uniformity and readability.

Install GoFmt

To install GoFmt, run the following command:

go install golang.org/x/tools/cmd/goimports
go install golang.org/x/tools/cmd/gofmt

How to use

Using GoFmt is very simple, just run the following command in the command line:

gofmt -w your_code.go

The above command will format the your_code.go file and save the changes.

Practical case

The following is an unformatted code snippet:

package main

import (
    "fmt"
    "log"
)

func main() {
    log.Println("Hello World!")
    fmt.Println("Hello Go!")
}

After formatting using GoFmt, the code will become:

package main

import (
    "fmt"
    "log"
)

func main() {
    log.Println("Hello World!")
    fmt.Println("Hello Go!")
}

As you can see, GoFmt has organized the code into a format that conforms to the Go programming style guide:

• Indentation: Code blocks are indented using 4 spaces indentation.
• Line width: Lines of code should be no more than 80 characters and automatically wrapped as needed.
• Brackets and semicolons:Brackets and semicolons are used correctly in the code.

Other options

GoFmt provides additional options to customize code formatting:

• -d : Only displays the diff without modifying the file.
• -l: Only check the code, no formatting.
• -r: Recursively format all Go files in the directory.

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