Gradle build support for publishing Maven snapshots. Updates the release.yml to publish only the Maven release artifacts. (opensearch-project#5797)

Signed-off-by: David Venable <dlv@amazon.com>
Signed-off-by: Jonah Calvo <caljonah@amazon.com>

Author: dlvenable

.github/workflows/release.yml

@@ -45,7 +45,7 @@ jobs:
       run: ./gradlew --parallel --max-workers 2 :release:archives:buildArchives
 
     - name: Build Maven Artifacts
-      run: ./gradlew publish
+      run: ./gradlew publishAllPublicationsToMavenRepository
 
     - name: Build Docker Image
       run: ./gradlew :release:docker:docker

build.gradle

@@ -22,7 +22,7 @@ allprojects {
     apply plugin: 'com.github.jk1.dependency-license-report'
 
     ext {
-        mavenPublicationRootFile = file("${rootProject.buildDir}/m2")
+        mavenPublicationRootFile = file(rootProject.layout.buildDirectory.dir('m2'))
     }
 
     spotless {

buildSrc/src/main/groovy/data-prepper.publish.gradle

@@ -15,6 +15,14 @@ afterEvaluate {
             maven {
                 url "file://${mavenPublicationRootFile.absolutePath}"
             }
+            maven {
+                name = 'snapshots'
+                url = 'https://aws.oss.sonatype.org/content/repositories/snapshots'
+                credentials {
+                    username "$System.env.SONATYPE_USERNAME"
+                    password "$System.env.SONATYPE_PASSWORD"
+                }
+            }
         }
         publications {
             mavenJava(MavenPublication) {