allow custom maven publishing

Author: serenibyss

build.gradle

@@ -18,9 +18,9 @@ plugins {
     id 'java'
     id 'java-library'
     id 'eclipse'
+    id 'maven-publish'
     id 'org.jetbrains.gradle.plugin.idea-ext' version '1.1.7'
     id 'com.gtnewhorizons.retrofuturagradle' version '1.3.+'
-    id 'scala' apply false
     id 'net.darkhax.curseforgegradle' version '1.0.+' apply false
     id 'com.modrinth.minotaur' version '2.7.+' apply false
     id 'com.diffplug.spotless' version '6.13.0' apply false
@@ -66,6 +66,7 @@ propertyDefaultIfUnset("modrinthRelations", "")
 propertyDefaultIfUnset("curseForgeProjectId", "")
 propertyDefaultIfUnset("curseForgeRelations", "")
 propertyDefaultIfUnset("releaseType", "release")
+propertyDefaultIfUnset("customMavenPublishUrl", "")
 propertyDefaultIfUnset("enableModernJavaSyntax", false)
 propertyDefaultIfUnset("enableSpotless", false)
 propertyDefaultIfUnset("enableJUnit", false)
@@ -739,6 +740,39 @@ def addModrinthDep(String scope, String type, String name) {
     project.modrinth.dependencies.add(dep)
 }
 
+if (customMavenPublishUrl) {
+    String publishedVersion = modVersion
+
+    publishing {
+        publications {
+            create('maven', MavenPublication) {
+                //noinspection GroovyAssignabilityCheck
+                from components.java
+
+                if (apiPackage) {
+                    artifact apiJar
+                }
+
+                // providers is not available here, use System for getting env vars
+                groupId = System.getenv('ARTIFACT_GROUP_ID') ?: project.group
+                artifactId = System.getenv('ARTIFACT_ID') ?: project.name
+                version = System.getenv('RELEASE_VERSION') ?: publishedVersion
+            }
+        }
+
+        repositories {
+            maven {
+                url = customMavenPublishUrl
+                allowInsecureProtocol = !customMavenPublishUrl.startsWith('https')
+                credentials {
+                    username = providers.environmentVariable('MAVEN_USER').getOrElse('NONE')
+                    password = providers.environmentVariable('MAVEN_PASSWORD').getOrElse('NONE')
+                }
+            }
+        }
+    }
+}
+
 
 // Buildscript updating
 

gradle.properties

@@ -103,6 +103,16 @@ releaseType = release
 # Prevent the source code from being published
 noPublishedSources = false
 
+
+# Publish to a custom maven location. Follows a few rules:
+# Group ID can be set with the 'ARTIFACT_GROUP_ID' environment variable, default to 'project.group'
+# Artifact ID can be set with the 'ARTIFACT_ID' environment variable, default to 'project.name'
+# Version can be set with the 'RELEASE_VERSION' environment variable, default to 'modVersion'
+# For maven credentials:
+# Username is set with the 'MAVEN_USER' environment variable, default to "NONE"
+# Password is set with the 'MAVEN_PASSWORD' environment variable, default to "NONE"
+customMavenPublishUrl =
+
 # Enable spotless checks
 # Enforces code formatting on your source code
 # By default this will use the files found here: https://github.com/GregTechCEu/Buildscripts/tree/master/spotless