build.gradle

buildscript {
    repositories {
        mavenCentral()
        jcenter()
        maven {
            name = "forge"
            url = "http://files.minecraftforge.net/maven"
        }
    }
    dependencies {
        classpath group: "net.minecraftforge.gradle", name: "ForgeGradle", version: "3.+", changing: true
    }
}

apply plugin: "net.minecraftforge.gradle"
apply plugin: "maven"
apply plugin: "java"
apply plugin: "idea"

version = "${minecraft_version}-" + getVersion()
group = "${group}"
archivesBaseName = "${archive}"

repositories {
    mavenLocal()
    mavenCentral()
    maven {
        name = "forge"
        url = "http://files.minecraftforge.net/maven"
    }
}

minecraft {
    mappings channel: "snapshot", version: "${mappings_version}"

    runs {
        client {
            workingDirectory project.file("run")
            source sourceSets.main
        }

        server {
            workingDirectory project.file("run")
            source sourceSets.main
        }
    }
}

dependencies {
    minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"
}

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

apply plugin: "maven"

wrapper {
    distributionType = Wrapper.DistributionType.ALL
    gradleVersion = '4.9'
}

uploadArchives {
    repositories {
        mavenDeployer {
            repository(url: "file://" + (System.getenv("local_maven") != null ? System.getenv("local_maven") : System.getenv("bamboo_local_maven")))
        }
    }
}

String getVersion() {
    String version = "${mod_version}"
    String branch = project.hasProperty("branch") ? project.branch : ""

    if(branch != "") {
        version += "-" + branch

        String buildNumber = getBuildNumber()
        if(buildNumber != "") {
            version += "." + buildNumber
        }
    }

    return version
}

static String getBuildNumber() {
    String buildNumber = System.getenv("BUILD_NUMBER") != null ? System.getenv("BUILD_NUMBER") : ""
    if(buildNumber == "") {
        buildNumber = System.getenv("bamboo_buildNumber") != null ? "." + System.getenv("bamboo_buildNumber") : ""
    }
    return buildNumber
}