Why is this an issue?

Duplicated string literals make the process of refactoring complex and error-prone, as any change would need to be propagated on all occurrences.

Exceptions

No issue will be raised on:

• literals having 5 or less characters
• literals containing only letters, digits and '_'
• literals passed to logging functions like: log.Println, slog.Info, logrus.Info etc. (standard and 3rd party libraries are supported)
• literals passed to error functions like: fmt.Errorf, errors.New, xerrors.New, etc. (standard and 3rd party libraries are supported)

How to fix it

Use constants to replace the duplicated string literals. Constants can be referenced from many places, but only need to be updated in a single place.

Code examples

Noncompliant code example

With the default threshold of 3:

func run() {
	prepare("This should be a constant")  // Noncompliant; 'This should ...' is duplicated 3 times
	execute("This should be a constant")
	release("This should be a constant")
}

Compliant solution

const ACTION = "This should be a constant"

func run() {
	prepare(ACTION)
	execute(ACTION)
	release(ACTION)
}