CreateMod/build.gradle

buildscript {
    repositories {
        maven { url = 'https://files.minecraftforge.net/maven' }
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '3.+', changing: true
    }
}
apply plugin: 'net.minecraftforge.gradle'
// Only edit below this line, the above code adds and enables the necessary things for Forge to be setup.
apply plugin: 'eclipse'
apply plugin: 'maven-publish'

version = 'mc1.15.2_v0.2'
group = 'com.simibubi.create'
archivesBaseName = 'create'

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

minecraft {
    mappings channel: 'snapshot', version: '20200301-mixed-1.15.2'
    
    runs {		
		client {
            workingDirectory project.file('run')
            property 'forge.logging.console.level', 'info'
            mods {
                create {
                    source sourceSets.main
                }
            }
        }

        server {
            workingDirectory project.file('run/server')
            property 'forge.logging.console.level', 'info'
            mods {
                create {
                    source sourceSets.main
                }
            }
        }

        data {
            workingDirectory project.file('run')
            property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'
            property 'forge.logging.console.level', 'debug'
            args '--mod', 'create', '--all', '--output', file('src/generated/resources/')
            mods {
                create {
                    source sourceSets.main
                }
            }
        }
    }
}

repositories {
  maven {
    // location of the maven that hosts JEI files
    name = "Progwml6 maven"
    url = "https://dvs1.progwml6.com/files/maven/"
  }
  maven {
    // location of a maven mirror for JEI files, as a fallback
    name = "ModMaven"
    url = "https://modmaven.k-4u.nl"
  }
  maven {
    // for mixed mappings
    name = "tterrag maven"
    url = "https://maven.tterrag.com/"
  }
}

dependencies {
    minecraft 'net.minecraftforge:forge:1.15.2-31.1.27'
    
    // compile against the JEI API but do not include it at runtime
 	compileOnly fg.deobf("mezz.jei:jei-1.15.2:6.0.0.2:api")
  	// at runtime, use the full JEI jar
  	runtimeOnly fg.deobf("mezz.jei:jei-1.15.2:6.0.0.2")
}

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

// Example configuration to allow publishing using the maven-publish task
// we define a custom artifact that is sourced from the reobfJar output task
// and then declare that to be published
// Note you'll need to add a repository here
def reobfFile = file("$buildDir/reobfJar/output.jar")
def reobfArtifact = artifacts.add('default', reobfFile) {
    type 'jar'
    builtBy 'reobfJar'
}
publishing {
    publications {
        mavenJava(MavenPublication) {
            artifact reobfArtifact
        }
    }
    repositories {
        maven {
            url "file:///${project.projectDir}/mcmodsrepo"
        }
    }
}