eslint-plugin-licenses

Ensures all source files have a license header

Installation

You'll first need to install ESLint:

npm i eslint --save-dev

Next, install eslint-plugin-licenses:

npm install eslint-plugin-licenses --save-dev

Usage

Add licenses to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

{
    "plugins": [
        "licenses"
    ]
}

Then configure the header you want to use

{
    "rules": {
        "licenses/header": [
            2,
            {
                "comment": "line",
                "header": [
                    "Copyright (c) {YEAR} fallaciousreasoning. All rights reserved."
                ]
            }
        ]
    }
}

The {YEAR} placeholder will be generated as the current year when running eslint --fix and will match any year (including ones in the future).

If you have existing headers with different formats, you can add them as altHeaders

{
    "rules": {
        "licenses/header": [
            2,
            {
                "comment": "line",
                "header": [
                    "Copyright (c) {YEAR} fallaciousreasoning. All rights reserved."
                ],
                "altHeaders": [
                    {
                        "comment": "block",
                        "header": [
                            "",
                            "Copyright (c) Me, always & forever",
                            ""
                        ]
                    }
                ]
            }
        ]
    }
}

This will match the headers

// Copyright (c) 2022 fallaciousreasoning. All rights reserved

and

/*
 * Copyright (c) Me, always & forever
 */

but when generating fixes will use the first format.