Add depreciation notice.

README.md

@@ -4,13 +4,62 @@ A license header manager for Gradle.
 
 Its goal is to ensure that the source files contains a predefined license header determined by some rules, and optionally generate them automatically with a Gradle task.
 
+## Depreciation Notice
+
+Since October 2023, the Quilt Licenser Gradle plugin is deprecated.  
+This plugin suffers from critical design flaws which leads to some OS-specific
+bugs and to a low ability to expand the plugin further in the future.
+
+To remedy those issues a rewrite was needed and the original author of this plugin
+has done such rewrite under a separate organization.
+The replacement plugin is the [Yumi Gradle Licenser Plugin].
+
+### Migration
+
+For those who wish to continue to use this kind of license header management plugin,
+the [Yumi Gradle Licenser Plugin] can be used as the replacement.
+
+That replacement plugin fixes some issues with this one:
+- Windows-specific license header detection issues are fixed.
+- Date-detection issues are fixed.
+- Kotlin is properly supported.
+
+For most cases the migration is a matter of a few line changes.
+
+In buildscripts the plugin identifier needs to be changed:
+```diff
+-	id 'org.quiltmc.gradle.licenser' version '2.+'
++	id 'dev.yumi.gradle.licenser' version '1.1.+'
+```
+
+The `license` block in buildscripts does not require any change.
+
+The format for license header files change significantly,
+the full documentation can be found [here](https://github.com/YumiProject/yumi-gradle-licenser/blob/main/README.md#license-header-rule).
+
+Changes include:
+- Replace the `${YEAR}` variable with `${CREATION_YEAR}`.
+- Addition of the `${FILE_NAME}` variable.
+- Metadata statements prefixed with `;;` are replaced with pre-processor statements prefixed with `#`:
+  - the `year_selection` statement is the same;
+  - the `year_display` statement no longer exists,
+    but similar behavior can be achieved through the use of `type` statements:
+    ```diff
+    - ;;year_display: list
+    + #type YEAR YEAR_LIST
+    ```
+    Please note that the `type` statement defines a new variable.
+  - the `match_from` statement does not currently have an equivalent,
+    but should not be an issue in most cases and only influenced initial runs of the `applyLicenses` task;
+  - a new kind of statement is available: `optional`, this allows to add optional parts to license headers.
+
 ## Usage
 
 For a project you need to apply the plugin to your project:
 
 ```groovy
 plugins {
-	id 'org.quiltmc.gradle.licenser' version '1.+'
+	id 'org.quiltmc.gradle.licenser' version '2.+'
 }
 ```
 
@@ -87,3 +136,5 @@ Currently, only the `${YEAR}` variable is available.
    Available values are:
    - `project` for which the project is used as reference,
    - `file` for which each file can have its own last modification year
+
+[Yumi Gradle Licenser Plugin]: https://github.com/YumiProject/yumi-gradle-licenser "The Git repository of the Yumi Gradle Licenser Plugin"

build.gradle

@@ -1,11 +1,11 @@
 plugins {
 	id 'com.gradle.plugin-publish' version '1.2.0'
 	id 'maven-publish'
-	id 'org.quiltmc.gradle.licenser' version '1.1.+'
+	id 'org.quiltmc.gradle.licenser' version '2.0.+'
 }
 
 group = "org.quiltmc"
-version = "2.0.1"
+version = "2.0.2"
 def javaVersion = 17
 
 repositories {
@@ -28,7 +28,7 @@ gradlePlugin {
 		quilt_gradle_licenser {
 			id = 'org.quiltmc.gradle.licenser'
 			displayName = "Quilt Gradle Licenser"
-			description = "A plugin to automatically manage license headers, designed to easily support different headers for different files."
+			description = "A plugin to automatically manage license headers, designed to easily support different headers for different files. This plugin is deprecated, please use dev.yumi.gradle.licenser instead."
 			tags.addAll('licenser', 'licensing', 'licenses', 'license-header')
 			implementationClass = 'org.quiltmc.gradle.licenser.QuiltLicenserGradlePlugin'
 		}

settings.gradle

@@ -2,10 +2,6 @@ pluginManagement {
 	repositories {
 		mavenCentral()
 		gradlePluginPortal()
-		maven {
-			name 'Quilt'
-			url 'https://maven.quiltmc.org/repository/release'
-		}
 	}
 }
 

src/main/java/org/quiltmc/gradle/licenser/QuiltLicenserGradlePlugin.java

@@ -47,6 +47,9 @@ public class QuiltLicenserGradlePlugin implements Plugin<Project> {
 	public void apply(Project project) {
 		var ext = project.getExtensions().create("license", QuiltLicenserGradleExtension.class, project);
 
+		project.getLogger()
+				.warn("The Quilt Gradle Licenser Plugin is deprecated. Please migrate to the Yumi Gradle Licenser plugin: https://github.com/QuiltMC/quilt-gradle-licenser#migration");
+
 		// Register tasks
 		project.getPlugins().withType(JavaBasePlugin.class).configureEach(plugin -> {
 			var sourceSets = (SourceSetContainer) project.getExtensions().getByName("sourceSets");