Create Your First Linter

Here I have the content to give the presentation about how to create your first linter.

The goal of this presentation is to create a linter, and run:

• standalone
• inside golangci-lint

🔗Link to the presentation

Tools

• I am using reveal.js to create the slides.
• I am using Jujutsu as a version control.

To start the slides, inside the ./slides/ folder, run:

npm start

Go Projects

Ast Example

Example on how the AST looks like for a small .go file

cd astexample && make t

Unexported Constants Check

Exercise to implement uber style guideline Prefix Unerxported Globals with _.

Bad	Good
// foo.go const ( defaultPort = 8080 defaultUser = "user" ) // bar.go func Bar() { defaultPort := 9090 ... fmt.Println("Default port", defaultPort) // We will not see a compile error if the first line of // Bar() is deleted. }	// foo.go const ( _defaultPort = 8080 _defaultUser = "user" )

To implement: analyzer.go

Custom Module

Small web app to run custom plugin linters.