readonly

readonly is a Go linter that enforces the immutability of struct fields, preventing modifications from outside their package.

This tool offers a simpler alternative to getter methods.

Installation

go install github.com/devinalvaro/readonly/cmd/readonly@latest

Usage

readonly [package]

Example

Consider the following struct:

package example

type Config struct {
	Name  string `readonly:"enforce"`
	Value string
}

readonly will report an error if Config.Name is modified from outside the example package.

Another example:

package example

type Config struct {
	Name  string `readonly:"enforce_all"`
	Value string
}

readonly now enforces both Config.Name and Config.Value.

Testing

The test file shows all cases that readonly covers.