Migrate to Maven Central Publisher Portal (#208)

see junit-team/junit-framework#4483

Author: marcphilipp

.github/workflows/main.yml

@@ -110,15 +110,15 @@ jobs:
       - shell: bash
         env:
           DEVELOCITY_ACCESS_KEY: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
-          ORG_GRADLE_PROJECT_sonatypeUsername: ${{ secrets.SONATYPE_USERNAME }}
-          ORG_GRADLE_PROJECT_sonatypePassword: ${{ secrets.SONATYPE_PASSWORD }}
+          ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.MAVEN_CENTRAL_USERNAME }}
+          ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}
         run: |
           ./gradlew \
           -Porg.gradle.java.installations.auto-download=false \
           "-Dscan.value.GitHub job=${{ github.job }}" \
           -Dscan.tag.publish \
           --scan \
           javaToolchains \
-          publish \
+          publishAllPublicationsToMavenCentralSnapshotsRepository \
           -x check \
           --no-configuration-cache

build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
     `maven-publish`
     signing
     id("com.diffplug.spotless") version "7.0.3"
-    id("io.github.gradle-nexus.publish-plugin") version "2.0.0"
+    id("com.gradleup.nmcp") version "0.1.4"
 }
 
 val javaToolchainVersion = providers.gradleProperty("javaToolchainVersion")
@@ -240,13 +240,6 @@ spotless {
     lineEndings = LineEnding.PLATFORM_NATIVE
 }
 
-nexusPublishing {
-    packageGroup.set("org.junit")
-    repositories {
-        sonatype()
-    }
-}
-
 publishing {
     publications {
         create<MavenPublication>("maven") {
@@ -280,6 +273,24 @@ publishing {
             }
         }
     }
+    repositories {
+        maven {
+            name = "mavenCentralSnapshots"
+            url = uri("https://central.sonatype.com/repository/maven-snapshots/")
+            credentials {
+                username = providers.gradleProperty("mavenCentralUsername").orNull
+                password = providers.gradleProperty("mavenCentralPassword").orNull
+            }
+        }
+    }
+}
+
+nmcp {
+    centralPortal {
+        username = providers.gradleProperty("mavenCentralUsername")
+        password = providers.gradleProperty("mavenCentralPassword")
+        publishingType = providers.gradleProperty("mavenCentralPublishingType").orElse("USER_MANAGED")
+    }
 }
 
 signing {