Backport to branch(3) : Create and publish snapshot version of data loader core

.github/workflows/release-snapshot.yaml

@@ -30,7 +30,7 @@ jobs:
           VERSION=$(./gradlew :core:properties -q | grep "version:" | awk '{print $2}')
           echo "version=${VERSION}" >> $GITHUB_OUTPUT
 
-      - name: Upload SNAPSHOT versions for scalardb, scalardb-schema-loader, and scalardb-integration-test to Maven Snapshot Repository
+      - name: Upload SNAPSHOT versions for scalardb, scalardb-schema-loader, scalardb-data-loader-core, and scalardb-integration-test to Maven Snapshot Repository
         if: contains(steps.version.outputs.version, '-SNAPSHOT')
         run: |
           echo "${{secrets.SIGNING_SECRET_KEY_RING}}" | base64 -d > ~/.gradle/secring.gpg

.github/workflows/upload-artifacts.yaml

@@ -57,7 +57,7 @@ jobs:
         run: |
           docker push ghcr.io/scalar-labs/scalardb-schema-loader:${{ steps.version.outputs.version }}
 
-      - name: Upload scalardb, scalardb-schema-loader, and scalardb-integration-test to Maven Central Repository
+      - name: Upload scalardb, scalardb-schema-loader, scalardb-data-loader-core, and scalardb-integration-test to Maven Central Repository
         run: |
           echo "${{secrets.SIGNING_SECRET_KEY_RING}}" | base64 -d > ~/.gradle/secring.gpg
           ./gradlew publish \

data-loader/core/build.gradle

@@ -2,6 +2,9 @@ plugins {
     id 'net.ltgt.errorprone' version "${errorpronePluginVersion}"
     id 'com.github.johnrengelman.shadow' version "${shadowPluginVersion}"
     id 'com.github.spotbugs' version "${spotbugsPluginVersion}"
+    id 'maven-publish'
+    id 'signing'
+    id 'base'
 }
 
 archivesBaseName = "scalardb-data-loader-core"
@@ -41,3 +44,67 @@ spotbugsTest.reports {
     html.enabled = true
 }
 spotbugsTest.excludeFilter = file("${project.rootDir}/gradle/spotbugs-exclude.xml")
+
+if (project.gradle.startParameter.taskNames.any { it.endsWith('publish') } ||
+        project.gradle.startParameter.taskNames.any { it.endsWith('publishToMavenLocal') }) {
+    // not to publish the fat jar to maven central
+    shadowJar.enabled = false
+}
+
+publishing {
+    publications {
+        mavenJava(MavenPublication) {
+            artifactId = 'scalardb-data-loader-core'
+            from components.java
+            pom {
+                name = 'ScalarDB Data Loader Core'
+                description = 'Core library for exporting data from and importing data into ScalarDB'
+                url = 'https://github.com/scalar-labs/scalardb'
+                licenses {
+                    license {
+                        name = 'Apache License, Version 2.0'
+                        url = 'http://www.apache.org/licenses/LICENSE-2.0'
+                    }
+                }
+                developers {
+                    developer {
+                        id = 'hiroyuki'
+                        name = 'Hiroyuki Yamada'
+                        email = '[email protected]'
+                    }
+                    developer {
+                        id = 'brfrn169'
+                        name = 'Toshihiro Suzuki'
+                        email = '[email protected]'
+                    }
+                    developer {
+                        id = 'Torch3333'
+                        name = 'Vincent Guilpain'
+                        email = '[email protected]'
+                    }
+                }
+                scm {
+                    connection = 'scm:git:https://github.com/scalar-labs/scalardb.git'
+                    developerConnection = 'scm:git:https://github.com/scalar-labs/scalardb.git'
+                    url = 'https://github.com/scalar-labs/scalardb'
+                }
+            }
+        }
+    }
+    repositories {
+        maven {
+            def releasesRepoUrl = "https://oss.sonatype.org/service/local/staging/deploy/maven2"
+            def snapshotsRepoUrl = "https://oss.sonatype.org/content/repositories/snapshots"
+            url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
+            credentials {
+                username = project.properties['ossrhUsername'] ?: ""
+                password = project.properties['ossrhPassword'] ?: ""
+            }
+        }
+    }
+}
+
+signing {
+    required { project.gradle.taskGraph.hasTask("publish") }
+    sign publishing.publications.mavenJava
+}