GitLab CI: manual publish

.gitignore

@@ -10,3 +10,6 @@ out/
 .gradle/
 build/
 publish.gradle
+
+# OTHER #
+secrets.properties

build.gradle

@@ -1,11 +1,11 @@
+//file:noinspection GroovyAssignabilityCheck
 plugins {
     id 'java'
+    id 'maven-publish'
 }
 
-def publishScript = file(rootProject.getProjectDir().getPath() + '/publish.gradle')
-if (publishScript.exists()) {
-    apply from: publishScript.path
-}
+def secrets = new Properties()
+file("secrets.properties").withInputStream { secrets.load(it) }
 
 project.group = projectGroup
 project.version = projectVersion
@@ -15,6 +15,7 @@ repositories {
     mavenCentral()
     maven { url 'https://hub.spigotmc.org/nexus/content/groups/public' }
     maven { url 'https://dmx-mc-project.gitlab.io/maven-repository/' }
+    maven { url "https://gitlab.com/api/v4/projects/${project.property('gitlab.projectid')}/packages/maven" }
 }
 
 ext {
@@ -76,4 +77,29 @@ dependencies {
 
 test {
     useJUnitPlatform()
-}
+}
+
+publishing {
+    publications {
+        mavenBinary(MavenPublication) {
+            groupId = project.property('projectGroup')
+            artifactId = project.property('projectName')
+            version = project.property('projectVersion')
+
+            from components.java
+        }
+    }
+
+    repositories {
+        maven {
+            url "https://gitlab.com/api/v4/projects/${project.property('gitlab.projectid')}/packages/maven"
+            credentials(HttpHeaderCredentials) {
+                name = 'Private-Token'
+                value = secrets.getProperty('gitlab.privateToken')
+            }
+            authentication {
+                header(HttpHeaderAuthentication)
+            }
+        }
+    }
+}

gradle.properties

@@ -1,3 +1,5 @@
 projectGroup=ghast
 projectName=ghast-tools
-projectVersion=1.12.1
+projectVersion=1.12.1
+
+gitlab.projectid=23328133