build.gradle

buildscript {
    repositories {
        maven { url = 'https://files.minecraftforge.net/maven' }
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'net.minecraftforge.gradle:ForgeGradle:3.+'
    }
}

apply plugin: 'net.minecraftforge.gradle'
apply plugin: 'eclipse'
apply plugin: 'maven-publish'

version = '1.0'
group = 'com.yourname.modid' // http://maven.apache.org/guides/mini/guide-naming-conventions.html
archivesBaseName = 'modid'

sourceCompatibility = targetCompatibility = compileJava.sourceCompatibility = compileJava.targetCompatibility = '1.8'

minecraft {
    mappings channel: 'snapshot', version: '20171003-1.12'
    // makeObfSourceJar = false // an Srg named sources jar is made by default. uncomment this to disable.

    // accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')


    runs {
        client {
            workingDirectory project.file('run')

            property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'

            property 'forge.logging.console.level', 'debug'
 }

 server {

 property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'

 property 'forge.logging.console.level', 'debug'
            }
       }
 }

 dependencies {
   minecraft 'net.minecraftforge:forge:1.12.2-14.23.5.2854'


}

jar {
    manifest {
        attributes([
            "Specification-Title": "examplemod",
            "Specification-Vendor": "examplemodsareus",
            "Specification-Version": "1",
            "Implementation-Title": project.name,
            "Implementation-Version": "${version}",
            "Implementation-Vendor" :"examplemodsareus",
            "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
        ])
    }
}

jar.finalizedBy('reobfJar')

//publish.dependsOn('reobfJar')

publishing {
    publications {
        mavenJava(MavenPublication) {
           artifact jar
        }
    }
    repositories {
        maven {
            url "file:///${project.projectDir}/mcmodsrepo"
        }
    }
}