Simple to use license header plugin for ESLint.
Add eslint-plugin-simple-header
as a dev dependency using your package manager:
$ pnpm add -D eslint-plugin-simple-header
# or yarn, npm etc
Given the following configuration:
{
"plugins": ["simple-header"],
"rules": {
"simple-header/header": [
"error",
{
"text": [
"Copyright (c) {year} {author}",
"SPDX-License-Identifier: GPL-3.0-or-later"
],
"templates": { "author": [".*", "Rini"] }
}
]
}
}
The rule will match a header like this:
/*
* Copyright (c) 1970 Linus Torvalds
* SPDX-License-Identifier: GPL-3.0-or-later
*/
And when running auto-fix, will insert a header like so:
/*
* Copyright (c) 2023 Rini
* SPDX-License-Identifier: GPL-3.0-or-later
*/
(Where 2023 is the current year, if you are from the future)
text
may be an array of lines, or an entire string. It’s also possible to give an array of paths to files
. In both
cases, they can include comment syntax and won’t be autoformatted (i.e. prefixed with *
s).
Inside the header’s text {template}
syntax can be used, which correlates to the template
key. The first value is a
regex used to match the header, and the second is a default value. By default, year
matches \d{4}
and defaults the
current year.
A few other options include:
newlines
specifies exactly how many lines should be after the header, and defaults to 1. If the file is empty otherwise, no newlines are added.syntax
specifies the comment syntax, defaults to["/*", "*/"]
. It may also be a string, for single-line comment blocks (e.g.//
)decor
specifies how the comment is formatted with a tuple of start, indent and end. Whensyntax
is a block comment, this defaults to["\n", " * ", "\n "]
, and defaults to" "
otherwise.linebreak
specifies the line ending to expect on files:"unix"
for LF,"windows"
for CRLF. By default it will auto-detect from the file.