returnstyles

Go (golang) linter to check function return styles according to rules of your choice.

Install

go install -v github.com/gavv/returnstyles/cmd/returnstyles@latest

Usage

returnstyles [options] <package>

For example:

returnstyles -allow-naked-returns=false .

Options

option	default	description
-allow-unnamed	true	allow functions with unnamed return variables
-allow-named	true	allow functions with named return variables
-allow-partially-named	false	allow functions with partially named return variables
-allow-normal-returns	true	allow normal (non-naked) returns in functions with named return variables
-allow-naked-returns	true	allow naked returns in functions with named return variables
-allow-mixing-returns	false	allow mixing normal and naked in functions with named return variables
-include-generated	false	include diagnostics for generated files

Config

Instead of specifying individual command-line options, you can provide a single configuration file in YAML format:

returnstyles -config path/to/config.yaml <package>

It should have the following format:

returnstyles:
  allow-unnamed: true
  allow-named: true
  allow-partially-named: false
  allow-normal-returns: true
  allow-naked-returns: true
  allow-mixing-returns: false
  include-generated: false

Package

import "github.com/gavv/returnstyles"

Global variable returnstyles.Analyzer follows guidelines in the golang.org/x/tools/go/analysis package.

Samples

-allow-unnamed=false

func foo() (int, int) { // lint: functions with unnamed return variables not allowed
    return 11, 22
}

-allow-named=false

func foo() (a int, b int) { // lint: functions with named return variables not allowed
    return 11, 22
}

-allow-partially-named=false

func foo() (int, b int) { // lint: functions with partially named return variables not allowed
    return 11, 22
}

-allow-normal-returns=false

func foo() (a int, b int) {
    return 11, 22 // lint: normal (non-naked) returns not allowed
                  // in functions with named return variables
}

-allow-naked-returns=false

func foo() (a int, b int) {
    a = 11
    b = 22
    return // lint: naked returns not allowed
}

-allow-mixing-returns=false

func foo() (a int, b int) {
    if cond() {
        return 11, 22
    } else {
        a = 11
        b = 22
        return // lint: mixing normal and naked returns not allowed
    }
}

func bar() (a int, b int) {
    if cond() {
        a = 11
        b = 22
        return
    } else {
        return 11, 22 // lint: mixing normal and naked returns not allowed
    }
}

Authors

See here.

License

MIT