Apply legacy plugin last, and declare capabilities for old plugins

build-logic/src/main/kotlin/shadow.convention.publish.gradle.kts

@@ -45,3 +45,34 @@ tasks.withType<Javadoc>().configureEach {
     it.addStringOption("Xdoclint:none", "-quiet")
   }
 }
+
+configurations {
+  sequenceOf(
+    apiElements,
+    runtimeElements,
+    named("javadocElements"),
+    named("sourcesElements"),
+  ).forEach {
+    it.configure {
+      outgoing {
+        // Main/current capability
+        capability("com.gradleup.shadow:shadow-gradle-plugin:$version")
+
+        // Historical capabilities
+        capability("io.github.goooler.shadow:shadow-gradle-plugin:$version")
+        capability("com.github.johnrengelman:shadow:$version")
+        capability("gradle.plugin.com.github.jengelman.gradle.plugins:shadow:$version")
+        capability("gradle.plugin.com.github.johnrengelman:shadow:$version")
+        capability("com.github.jengelman.gradle.plugins:shadow:$version")
+      }
+    }
+  }
+}
+
+publishing.publications.withType<MavenPublication>().configureEach {
+  // We don't care about capabilities being unmappable to Maven
+  suppressPomMetadataWarningsFor("apiElements")
+  suppressPomMetadataWarningsFor("runtimeElements")
+  suppressPomMetadataWarningsFor("javadocElements")
+  suppressPomMetadataWarningsFor("sourcesElements")
+}

src/docs/changes/README.md

@@ -3,6 +3,7 @@
 
 ## [Unreleased]
 
+- Apply legacy plugin last, and declare capabilities for old plugins, fixes [#964](https://github.com/GradleUp/shadow/issues/964) ([#991](https://github.com/GradleUp/shadow/pull/991))
 
 ## [v8.3.2]
 

src/main/groovy/com/github/jengelman/gradle/plugins/shadow/ShadowPlugin.groovy

@@ -13,13 +13,18 @@ class ShadowPlugin implements Plugin<Project> {
     void apply(Project project) {
         project.with {
             plugins.apply(ShadowBasePlugin)
-            plugins.apply(LegacyShadowPlugin)
             plugins.withType(JavaPlugin) {
                 plugins.apply(ShadowJavaPlugin)
             }
             plugins.withType(ApplicationPlugin) {
                 plugins.apply(ShadowApplicationPlugin)
             }
+            // Apply the legacy plugin last
+            //   Because we apply the ShadowJavaPlugin/ShadowApplication plugin in a withType callback for the
+            //   respective JavaPlugin/ApplicationPlugin, it may still apply before the shadowJar task is created and
+            //   etc. if the user applies shadow before those plugins. However, this is fine, because this was also
+            //   the behavior with the old plugin when applying in that order.
+            plugins.apply(LegacyShadowPlugin)
 
             // Legacy build scan support for Gradle Enterprise, users should migrate to develocity plugin.
             rootProject.plugins.withId('com.gradle.enterprise') {