Yumi Licenser Gradle Plugin

A license header manager plugin for Gradle.

The goal of this plugin is to ensure that the source files contains a predefined license header determined by some rules, and optionally to generate them automatically through a Gradle task.

This plugin is different from other similar plugins as it manages more easily projects bound to multiple licenses.

Usage

For a project you need to apply the plugin to your project:

plugins {
	id "dev.yumi.gradle.licenser" version "1.2.+"
}

This plugin is available on the Gradle Plugin Portal.

Tasks

Name	Description
applyLicenses	Updates the license headers in the selected source files.
checkLicenses	Verifies the license headers for the selected source files.

More tasks are available for each source set.

Configuration

The plugin can be configured using the license extension on the project.

license {
	// Add a license header rule, at least one must be present.
	rule file("codeformat/HEADER")

	// Exclude/include certain file types, defaults are provided to easily deal with Java/Kotlin projects.
	include "**/*.java" // Include Java files into the file resolution.
	exclude "**/*.properties" // Exclude properties files from the file resolution.
}

These configuration options are not final as more may come in the future. Feel free to request changes through the issue tracker if the current options don't satisfy your needs.

License header rule

A license header rule is a file containing a template-like license header. It will define how the license headers should look like, with the ability to resolve some variables like the file creation year, and the ability to make some lines optional.

Multiple license header rules can be given to the plugin, the plugin will then attempt to identify the license headers to use by trying each given rules in the same order as the definition of those rules.

An example file can be found in this repository: codeformat/HEADER.

Format

A license header rule contains the license header text, along with pre-processor statements and variable tokens.

Variable tokens are parsed by matching any characters between ${ and }. For example: ${VARIABLE}.

File example:

License text ${CREATION_YEAR}.

#optional
Optional line
#end

#year_selection file

Variables

There are the default variables:

Name	Default Value	Description
CREATION_YEAR	Current year if the year selection is file, or the project creation year otherwise.	The year the file or project was created (depends on year_selection value).
FILE_NAME	The name of the current file.	The name of the current file.

More variables can be defined with the usage of the type pre-processor.

Pre-Processor Statements

optional

Optional text is encapsulated between an #optional statement and ends with a #end statement.

type

The type pre-processor statement allows to define a new variable with a type: #type <VARIABLE NAME> <VARIABLE TYPE>

year_selection

Defines how the creation and modification years for each file should be gathered: per-project or per-file: #year_selection <file|project>.

The default value is project.