remove legacy extension

plugin/src/integrationTest/fixtures/common/gradle.properties

@@ -1,3 +1,5 @@
+RELEASE_SIGNING_ENABLED=true
+
 GROUP=com.example
 VERSION_NAME=1.0.0
 POM_ARTIFACT_ID=test-artifact

plugin/src/integrationTest/fixtures/full_pom_project/gradle.properties

@@ -1,3 +1,5 @@
+RELEASE_SIGNING_ENABLED=true
+
 GROUP=com.example
 VERSION_NAME=1.0.0
 POM_ARTIFACT_ID=test-artifact

plugin/src/integrationTest/fixtures/minimal_pom_project/gradle.properties

@@ -1,3 +1,5 @@
+RELEASE_SIGNING_ENABLED=true
+
 GROUP=com.example
 VERSION_NAME=1.0.0
 POM_ARTIFACT_ID=test-artifact

plugin/src/main/kotlin/com/vanniktech/maven/publish/MavenPublishBaseExtension.kt

@@ -14,8 +14,8 @@ abstract class MavenPublishBaseExtension(
   private val project: Project
 ) {
 
-  internal var mavenCentral: Pair<SonatypeHost, String?>? = null
-  internal var signing: Boolean? = null
+  private var mavenCentral: Pair<SonatypeHost, String?>? = null
+  private var signing: Boolean? = null
   private var pomFromProperties: Boolean? = null
   private var platform: Platform? = null
 

plugin/src/main/kotlin/com/vanniktech/maven/publish/MavenPublishPlugin.kt

@@ -4,68 +4,25 @@ import com.vanniktech.maven.publish.legacy.configurePlatform
 import com.vanniktech.maven.publish.legacy.setCoordinates
 import org.gradle.api.Plugin
 import org.gradle.api.Project
-import org.gradle.plugins.signing.SigningPlugin
 
 open class MavenPublishPlugin : Plugin<Project> {
 
   override fun apply(project: Project) {
     project.plugins.apply(MavenPublishBasePlugin::class.java)
     val baseExtension = project.baseExtension
 
-    // Apply signing immediately. It is also applied by `signAllPublications` but the afterEvaluate means
-    // that it's APIs are not available for consumers without also using afterEvaluate.
-    project.plugins.apply(SigningPlugin::class.java)
-
-    val extension = project.extensions.create("mavenPublish", MavenPublishPluginExtension::class.java, project)
-
     project.setCoordinates()
     project.configurePlatform()
 
-    project.afterEvaluate {
-      val sonatypeHost = extension.sonatypeHost
-      // ignore old extension if new extension was already called
-      if (sonatypeHost != null && baseExtension.mavenCentral == null) {
-        // only print warning when sonatypeHost was not set through a gradle property, we will continue supporting this
-        if (extension.sonatypeHostProperty() == null) {
-          when (sonatypeHost) {
-            SonatypeHost.DEFAULT -> project.logger.warn(
-              "The project is currently configured to be published to " +
-                "Maven  Central. To maintain the current behavior, you need to explicitly add SONATYPE_HOST=DEFAULT to " +
-                "your gradle.properties or add the following to your build files:\n" +
-                "mavenPublishing {" +
-                "  publishToMavenCentral()" +
-                "}"
-            )
-            SonatypeHost.S01 -> project.logger.warn(
-              "Configuring the sonatypeHost through the DSL is deprecated. " +
-                "Remove the old option and then add either SONATYPE_HOST=S01 to your gradle.properties or add the " +
-                "following to your build files:\n" +
-                "mavenPublishing {" +
-                "  publishToMavenCentral(\"S01\")" +
-                "}"
-            )
-          }
-        }
-
-        baseExtension.publishToMavenCentral(sonatypeHost)
-      }
-
-      // ignore old extension if new extension was already called
-      if (extension.releaseSigningEnabled && baseExtension.signing == null) {
-        if (extension.releaseSigningProperty() == null) {
-          project.logger.warn(
-            "The project is currently configured to be automatically sign release builds before " +
-              "publishing. To maintain the current behavior you will need to explicitly add " +
-              "RELEASE_SIGNING_ENABLED=true to your gradle.properties or add the following to your build files:\n" +
-              "mavenPublishing {" +
-              "  signAllPublications()" +
-              "}"
-          )
-        }
-        baseExtension.signAllPublications()
-      }
-
-      baseExtension.pomFromGradleProperties()
+    val sonatypeHost = project.findOptionalProperty("SONATYPE_HOST")
+    if (sonatypeHost != null && sonatypeHost.isNotBlank()) {
+      baseExtension.publishToMavenCentral(SonatypeHost.valueOf(sonatypeHost))
+    }
+    val releaseSigning = project.findOptionalProperty("RELEASE_SIGNING_ENABLED")?.toBoolean()
+    if (releaseSigning == true) {
+      baseExtension.signAllPublications()
     }
+
+    baseExtension.pomFromGradleProperties()
   }
 }

plugin/src/main/kotlin/com/vanniktech/maven/publish/ProjectExtensions.kt

@@ -8,9 +8,6 @@ import org.gradle.plugins.signing.SigningExtension
 
 internal fun Project.findOptionalProperty(propertyName: String) = findProperty(propertyName)?.toString()
 
-internal inline val Project.legacyExtension: MavenPublishPluginExtension
-  get() = extensions.getByType(MavenPublishPluginExtension::class.java)
-
 internal inline val Project.baseExtension: MavenPublishBaseExtension
   get() = extensions.getByType(MavenPublishBaseExtension::class.java)