build.gradle

buildscript {
    repositories {
        maven { url = 'https://files.minecraftforge.net/maven' }
        maven { url = 'https://repo.spongepowered.org/repository/maven-public/' }
        mavenCentral()
    }
    dependencies {
        classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '4.1.+', changing: true
        classpath 'org.spongepowered:mixingradle:0.7-SNAPSHOT'
    }
}
apply plugin: 'net.minecraftforge.gradle'
apply plugin: 'org.spongepowered.mixin'

// Maven info
version = "${modMinecraftVersion}-${modVersion}"
group = modGroup
archivesBaseName = modFileName

java.toolchain.languageVersion = JavaLanguageVersion.of(8) // Mojang ships Java 8 to end users, so your mod should target Java 8.

println('Java: ' + System.getProperty('java.version') + ' JVM: ' + System.getProperty('java.vm.version') + '(' + System.getProperty('java.vendor') + ') Arch: ' + System.getProperty('os.arch'))
minecraft {
    mappings channel: modMcpMappingsChannel, version: modMcpMappingsVersion
    // 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')
            arg "-mixin.config=" + modId + ".mixins.json"
            property 'mixin.env.disableRefMap', 'true'
//            property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'
//            property 'forge.logging.console.level', 'debug'

            mods { betterportals { source sourceSets.main } }
        }

        server {
            workingDirectory project.file('run')
            arg "-mixin.config=" + modId + ".mixins.json"
//            property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'
//            property 'forge.logging.console.level', 'debug'
            mods { betterportals { source sourceSets.main } }
        }

        data {
            workingDirectory project.file('run')
//            property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'
//            property 'forge.logging.console.level', 'debug'

            // Specify the modid for data generation, where to output the resulting resource, and where to look for existing resources.
            args '--mod', 'betterportals', '--all', '--output', file('src/generated/resources/'), '--existing', file('src/main/resources/')

            mods { betterportals { source sourceSets.main } }
        }
    }
}

// Include resources generated by data generators.
sourceSets.main.resources { srcDir 'src/generated/resources' }

repositories {
    mavenCentral()
}

dependencies {
    minecraft "net.minecraftforge:forge:" + modMinecraftVersion + "-" + modForgeVersion
    compile fg.deobf("com.yungnickyoung.minecraft.yungsapi:YungsApi:${yungsApiVersion}")
    if (System.getProperty("idea.sync.active") != "true") {
        annotationProcessor 'org.spongepowered:mixin:0.8.2:processor'
    }
}

processResources {
    // this will ensure that this task is redone when any variables change
    inputs.property "modId", modId
    inputs.property "version", project.version
    inputs.property "modName", modName
    inputs.property "modCredits", modCredits
    inputs.property "modAuthor", modAuthor
    inputs.property "modDescription", modDescription
    inputs.property "modMinecraftVersion", modMinecraftVersion

    // Replace stuff in mods.toml, nothing else
    from(sourceSets.main.resources.srcDirs) {
        include 'META-INF/mods.toml'

        // Replace vars in mods.toml
        expand 'modId':modId,
                'version': project.version,
                'modName':modName,
                'modCredits':modCredits,
                'modAuthor':modAuthor,
                'modDescription':modDescription,
                'modMinecraftVersion': modMinecraftVersion
    }

    // Copy everything else except the mods.toml
    from(sourceSets.main.resources.srcDirs) {
        exclude 'META-INF/mods.toml'
    }
}

// Example for how to get properties into the manifest for reading by the runtime..
jar {
    manifest {
        attributes([
                "Specification-Title"     : modId,
                "Specification-Vendor"    : modGroup,
                "Specification-Version"   : "1.0", // We are version 1 of ourselves
                "Implementation-Title"    : project.name,
                "Implementation-Version"  : "${version}",
                "Implementation-Vendor"   : modGroup,
                "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
                "Signing-Fingerprint"     : project.hasProperty('signSHA1') ? project.findProperty('signSHA1') : "unsigned",
                "MixinConfigs": "${modId}.mixins.json"
        ],)
    }
}

// Example configuration to allow publishing using the maven-publish task
// This is the preferred method to reobfuscate your jar file
jar.finalizedBy('reobfJar') 
// However if you are in a multi-project build, dev time needs unobfed jar files, so you can delay the obfuscation until publishing by doing
//publish.dependsOn('reobfJar')

mixin {
    add sourceSets.main, "${modId}.refmap.json"
}