update buildscript

build.gradle

@@ -1,4 +1,4 @@
-//version: 928ecf7feb33a1149538b0e2cd17e3bc5f281428
+//version: be36e1399d5622c152db7c530c48e17cde0ce1bb
 /*
 DO NOT CHANGE THIS FILE!
 
@@ -42,6 +42,7 @@ plugins {
     id("org.ajoberstar.grgit") version("3.1.1")
     id("com.github.johnrengelman.shadow") version("4.0.4")
     id("com.palantir.git-version") version("0.12.3")
+    id("maven-publish")
 }
 
 apply plugin: 'forge'
@@ -460,6 +461,38 @@ artifacts {
     }
 }
 
+// publishing
+publishing {
+    publications {
+        maven(MavenPublication) {
+            artifact source: jar
+            artifact source: sourcesJar, classifier: "src"
+            artifact source: devJar, classifier: "dev"
+            if (apiPackage) {
+                archives source: apiJar, classifier: "api"
+            }
+
+            groupId = System.getenv("ARTIFACT_GROUP_ID") ?: group
+            artifactId = System.getenv("ARTIFACT_ID") ?: project.name
+            version = System.getenv("ARTIFACT_VERSION") ?: project.version
+        }
+    }
+
+    repositories {
+        maven {
+            String owner = System.getenv("REPOSITORY_OWNER") ?: "Unknown"
+            String repositoryName = System.getenv("REPOSITORY_NAME") ?: "Unknown"
+            String githubRepositoryUrl = "https://maven.pkg.github.com/$owner/$repositoryName"
+            name = "GitHubPackages"
+            url = githubRepositoryUrl
+            credentials {
+                username = System.getenv("GITHUB_ACTOR") ?: "NONE"
+                password = System.getenv("GITHUB_TOKEN") ?: "NONE"
+            }
+        }
+    }
+}
+
 // Updating
 task updateBuildScript {
     doLast {