#309 Switch to regular Maven publishing using a "marker artifact"

Kudos to the Gradle support forum: https://discuss.gradle.org/t/how-to-publish-to-maven-local-multi-project-java-library-gradle-plugin/47512/2

build.gradle

@@ -51,25 +51,6 @@ allprojects {
     }
 }
 
-subprojects {
-    ext {
-        publishVariant = { String variant ->
-            publishing {
-                publications {
-                    maven(MavenPublication) {
-                        from components[variant]
-
-                        // We have to perform some fancy renaming to make the plugin GAV coordinates match with docToolchain
-                        groupId = group
-                        artifactId = "org.aim42.${project.name.replaceAll('-', '.')}"
-                        version = version
-                    }
-                }
-            }
-        }
-    }
-}
-
 configure(subprojects) {
     apply plugin: 'java'
     apply plugin: 'groovy'
@@ -101,8 +82,6 @@ configure(subprojects) {
     // The CodeNarc plugin performs quality checks on your project’s
     // Groovy source files using CodeNarc and generates reports from these checks.
     // apply plugin: 'codenarc'
-
-    project.ext.publishVariant('java')
 }
 
 /*

htmlSanityCheck-core/build.gradle

@@ -1,3 +1,7 @@
+plugins {
+    id 'java-library'
+}
+
 dependencies {
     implementation libs.slf4j.api
     testImplementation libs.slf4j.nop
@@ -8,8 +12,6 @@ dependencies {
     implementation 'org.codehaus.groovy:groovy-dateutil'
 }
 
-//apply plugin: 'groovy'
-
 tasks.register('copyResourceImages', Copy) {
     from('src/main/resources') {
         include '**/*.png'

htmlSanityCheck-gradle-plugin/build.gradle

@@ -1,4 +1,15 @@
-apply plugin: 'java-gradle-plugin'
+plugins {
+    id 'java-gradle-plugin'
+}
+
+gradlePlugin {
+    plugins {
+        htmlSanityCheck {
+            id = 'org.aim42.htmlSanityCheck'
+            implementationClass = 'org.aim42.htmlsanitycheck.HtmlSanityCheckPlugin'
+        }
+    }
+}
 
 dependencies {
     testImplementation(