Fix JitPack (#1547)

Author: nedtwigg

CONTRIBUTING.md

@@ -207,7 +207,7 @@ If it doesn't work, you can check the JitPack log at `https://jitpack.io/com/git
 
 ### Maven
 
-Run `./gradlew publishToMavenLocal` to publish this to your local repository. The maven plugin is not published to JitPack due to [jitpack/jitpack.io#4112](https://github.com/jitpack/jitpack.io/issues/4112).
+Run `./gradlew publishToMavenLocal` to publish this to your local repository. You can also use the JitPack artifacts, using the same principles as Gradle above.
 
 ## License
 

gradle/java-publish.gradle

@@ -170,7 +170,11 @@ model {
 	}
 }
 
-if (!version.endsWith('-SNAPSHOT')) {
+if (System.env['JITPACK'] == 'true') {
+	signing {
+		setRequired(false)
+	}
+} else if (!version.endsWith('-SNAPSHOT')) {
 	signing {
 		String gpg_key = decode64('ORG_GRADLE_PROJECT_gpg_key64')
 		useInMemoryPgpKeys(gpg_key, System.env['ORG_GRADLE_PROJECT_gpg_passphrase'])

jitpack.yml

@@ -0,0 +1,2 @@
+jdk:
+  - openjdk11

plugin-maven/CHANGES.md

@@ -5,6 +5,7 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 ## [Unreleased]
 ### Added
 * A synthesis log with the number of considered files is added after each formatter execution ([#1507](https://github.com/diffplug/spotless/pull/1507))
+* Any commit of the Spotless maven plugin now available via JitPack ([#1547](https://github.com/diffplug/spotless/pull/1547))
 
 ## [2.31.0] - 2023-01-26
 ### Added

settings.gradle

@@ -91,7 +91,7 @@ def getStartProperty(java.lang.String name) {
 
 }
 
-if (System.getenv('SPOTLESS_EXCLUDE_MAVEN') != 'true' && getStartProperty('SPOTLESS_EXCLUDE_MAVEN') != 'true' && System.getenv('JITPACK') != 'true') {
+if (System.getenv('SPOTLESS_EXCLUDE_MAVEN') != 'true' && getStartProperty('SPOTLESS_EXCLUDE_MAVEN') != 'true') {
 	include 'plugin-maven'	// maven-specific glue code
 }