build.gradle

// Gradle repositories and dependencies
buildscript {
    repositories {
        gradlePluginPortal()
    }
    dependencies {
        classpath 'gradle.plugin.com.hierynomus.gradle.plugins:license-gradle-plugin:0.16.1'
        classpath 'gradle.plugin.com.github.jengelman.gradle.plugins:shadow:7.0.0'
    }
}

import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar

// Apply plugin
apply plugin: 'java'
apply plugin: 'com.github.hierynomus.license'
apply plugin: 'checkstyle'
apply plugin: 'maven-publish'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'com.github.johnrengelman.shadow'
apply plugin: 'potemkin-modules'

// Default tasks
defaultTasks 'licenseFormat', 'check', 'build'

// Basic project information
group = 'org.spongepowered'
archivesBaseName = 'mixin'
version = buildVersion + (buildType == 'RELEASE' ? '' : "-$buildType")

// Extended project information
ext.projectName = 'Mixin'
ext.inceptionYear = '2014'
ext.packaging = 'jar'

// Define variables
ext.buildNumber = project.hasProperty("buildNumber") ? buildNumber : '0'
ext.ciSystem = project.hasProperty("ciSystem") ? ciSystem : 'unknown'
ext.commit = project.hasProperty("commit") ? commit : 'unknown'
ext.asmVersion = project.hasProperty("asmVersion") ? asmVersion : '6.2'

// True to do jar signing task
ext.doSignJar = project.hasProperty("keyStorePath")

java {
    toolchain.languageVersion = JavaLanguageVersion.of(ciSystem == 'unknown' ? 16 : 8)
}

// Project repositories
repositories {
    mavenCentral()
    maven {
        name = 'minecraft'
        url = 'https://libraries.minecraft.net/'
    }
    maven {
        // For fernflower
        name = 'sponge'
        url = 'https://repo.spongepowered.org/maven'
    }
    maven {
        // For modlauncher
        name = 'forge'
        url = 'https://files.minecraftforge.net/maven'
    }
}

configurations {
    stagingJar
    
    exampleImplementation       .extendsFrom implementation
    fernflowerImplementation    .extendsFrom implementation
    launchwrapperImplementation .extendsFrom implementation
    agentImplementation         .extendsFrom implementation
}

sourceSets {
    legacy {
        ext.languageVersion = 8
        ext.compatibility = '1.6'
    }
    main {
        compileClasspath += legacy.output
        ext.languageVersion = 8
        ext.compatibility = '1.6'
    }
    ap {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.6'
    }
    fernflower {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.6'
    }
    agent {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.6'
    }
    bridge {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.8'
    }
    example {
        compileClasspath += main.output
        compileClasspath += ap.output
    }
    launchwrapper {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.8'
    }
}

// Because Mixin aims to support a variety of environments, we have to be able to run with older versions of GSON and Guava that lack official module
// names. This means the same library may appear with multiple module names. We want to be able to link our module with either of these two at
// runtime, without having to have two versions of the library on our compile-time module path. To do this, we generate empty "potemkin" jars with
// *only* a module descriptor for the module we want to be able to compile against.
potemkinModules {
    module 'com.google.gson'
    module 'com.google.common'
}

// Project dependencies
dependencies {
    def guava = 'com.google.guava:guava:21.0' // from mc1.12 onwards
    
    implementation guava
    implementation 'com.google.code.gson:gson:2.2.4'
    if (Float.parseFloat(asmVersion) < 6) {
        implementation "org.ow2.asm:asm-debug-all:$asmVersion"
    }
    implementation "org.ow2.asm:asm-tree:$asmVersion"
    implementation "org.ow2.asm:asm-commons:$asmVersion"
    implementation "org.ow2.asm:asm-util:$asmVersion"

    // Annotation Processor
    apImplementation "org.ow2.asm:asm-tree:$asmVersion"
    apImplementation guava
    
    // Fernflower decompiler
    fernflowerImplementation 'org.jetbrains.java.decompiler:fernflower:sponge-SNAPSHOT'

    // LegacyLauncher service
    launchwrapperImplementation ('net.minecraft:launchwrapper:1.11') {
        exclude module: 'lwjgl'
        exclude module: 'asm-debug-all'
        exclude module: 'jopt-simple'
    }
    
    // asm bridge
    bridgeImplementation 'org.apache.logging.log4j:log4j-core:2.0-beta9'
    bridgeImplementation "org.ow2.asm:asm-commons:$legacyForgeAsmVersion"
	
    legacyImplementation "org.ow2.asm:asm-tree:$asmVersion"
}

javadoc {
    exclude '**/throwables'
    classpath += sourceSets.legacy.output
    source sourceSets.ap.allJava
    exclude {
        it.relativePath.file && it.relativePath.pathString =~ 'tools' && !(it.name =~ /SuppressedBy|package-info/) }
    options {
        docTitle 'Welcome to the Mixin Javadoc'
        overview 'docs/javadoc/overview.html'
        stylesheetFile file('docs/javadoc/mixin.css')
        addBooleanOption '-allow-script-in-comments', true
    }
    doLast {
        copy {
            from 'docs/javadoc/resources'
            into outputDirectory
        }
    }
}

eclipse {
    classpath {
        containers 'org.eclipse.buildship.core.gradleclasspathcontainer'
        file.whenMerged {
            entries.removeAll { it.kind == 'lib' && it.path =~ ~/log4j.*beta9/ }
            
            // Mark everything else as a module
            entries.findAll { it.kind == "con" && it.path =~ /gradleclasspathcontainer$/ }.each {
                it.entryAttributes['module'] = 'true'
            }
        }
    }
    
    project {
        resourceFilter {
            appliesTo = 'FOLDERS'
            type = 'EXCLUDE_ALL'
            matcher {
                id = 'org.eclipse.ui.ide.multiFilter'
                arguments = '1.0-name-matches-false-false-buildSrc'
            }
        }
    }
    
    // Build service task outputs for test projects
    autoBuildTasks compileLaunchwrapperJava
}

// Filter, process, and include resources
processResources {
    // Include in final JAR
   from 'LICENSE.txt'
}

// License header formatting
license {
    ext {
        name = project.name
        organization = project.organization
        url = project.url
    }
    include '**/*.java'
    header file("HEADER.txt")
    sourceSets = project.sourceSets
    ignoreFailures false
    strictCheck true
    mapping {
        java = 'SLASHSTAR_STYLE'
    }
}

checkstyle {
    configProperties = [
        "name"        : project.name,
        "organization": project.organization,
        "url"         : project.url,
        "year"        : project.inceptionYear
    ]
    configFile = file("checkstyle.xml")
    toolVersion = '8.44'
}

// Source compiler configuration
tasks.withType(JavaCompile) {
    options.compilerArgs += ['-Xlint:all', '-Xlint:-path', '-proc:none']
    options.deprecation = true
    options.encoding = 'utf8'
}

project.sourceSets.each { set -> {
    if (set.ext.has("languageVersion")) {
        project.tasks[set.compileJavaTaskName].javaCompiler = javaToolchains.compilerFor {
            languageVersion = JavaLanguageVersion.of(set.ext.languageVersion)
        }
    } 
    if (set.ext.has("compatibility")) {
        project.tasks[set.compileJavaTaskName].sourceCompatibility = set.ext.compatibility
        project.tasks[set.compileJavaTaskName].targetCompatibility = set.ext.compatibility
    }
}}

if (JavaVersion.current().isJava8Compatible()) {
    tasks.withType(Javadoc) {
        // disable the crazy super-strict doclint tool in Java 8
        options.addStringOption('Xdoclint:syntax', '-quiet')
    }
}

task stagingJar(type: ShadowJar) {
    sourceSets.findAll { !(it.name =~ /example|test/) }.each {
        from it.output
    }
    configurations = [project.configurations.stagingJar]
    
    // JAR manifest configuration
    manifest.attributes(
        "Built-By": System.properties['user.name'],
        "Created-By": System.properties['java.vm.version'] + " (" + System.properties['java.vm.vendor'] + ")",
        "Implementation-Title": name,
        "Implementation-Version": project.version + "+" + ciSystem + "-b" + buildNumber + ".git-" + commit,
        "Implementation-Vendor": url,
        // for hotswap agent
        "Premain-Class": "org.spongepowered.tools.agent.MixinAgent",
        "Agent-Class": "org.spongepowered.tools.agent.MixinAgent",
        "Can-Redefine-Classes": true,
        "Can-Retransform-Classes": true
    )

    if (project.doSignJar) {
        classifier = 'unsigned'
    }
    
    mergeServiceFiles()
}

// Clear artifacts because jar will be there by default and we want to use staging jar instead
configurations.archives.artifacts.clear()

// generate shadow jar so we can use the AP standalone
shadowJar  {
    from sourceSets.ap.output
    classifier = 'processor'
}
build.dependsOn(shadowJar)

if (project.doSignJar) {
    // Define signjar task    
    task signJar() {
        inputs.files(stagingJar.outputs)
        outputs.files stagingJar.outputs.files.collect {
            new File(it.parent, it.name.replace('-unsigned', ''))
        }
        doLast {
            stagingJar.outputs.files.each {
                ant.signjar(
                    alias: project.keyStoreCert,
                    jar: it,
                    signedJar: new File(it.parent, it.name.replace('-unsigned', '')),
                    keystore: project.keyStorePath,
                    storepass: project.keyStoreSecret,
                    keypass: project.keyStoreSecret,
                    tsaurl: project.timestampAuthority,
                    preservelastmodified: 'true',
                    verbose: true
                )
            }
        }
    }
    build.dependsOn(signJar)
}

// Run this task instead of build to generate a timestamped shadow jar (for dev)
task timestamp(type: Jar, dependsOn: build) {
    if (gradle.startParameter.taskNames.contains(name)) {
        shadowJar.classifier = new Date().format('yyyyMMddHHmmss')
    }
}

task sourceJar(type: Jar) {
    sourceSets.findAll { it.name != 'modularity' }.each {
        from it.java
        from it.resources
    }
	classifier = "sources"
    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
}

task javadocJar(type: Jar, dependsOn: javadoc) {
	from javadoc.destinationDir
	classifier = "javadoc"
}

artifacts {
    if (project.doSignJar) {
        archives signJar.outputs.files[0]
    } else {
        archives stagingJar
    }
    archives sourceJar
    archives javadocJar
    archives shadowJar
}

ext.mavenPom = {
    name = project.archivesBaseName
    packaging = project.packaging
    description = project.projectName
    url = 'http://www.spongepowered.org/'

    scm {
        url = 'https://github.com/SpongePowered/Mixin'
        connection = 'scm:git:git://github.com/SpongePowered/Mixin.git'
        developerConnection = 'scm:git:git@github.com:SpongePowered/Mixin.git'
    }

    issueManagement {
        system = 'GitHub Issues'
        url = 'https://github.com/SpongePowered/Mixin/issues'
    }

    licenses {
        license {
            name = 'MIT license'
            url = 'http://opensource.org/licenses/MIT'
            distribution = 'repo'
        }
    }
}

publishing {
    publications {
        maven(MavenPublication) {
            pom mavenPom
            groupId = project.group
            version = project.version
            artifactId = project.archivesBaseName

            if (project.doSignJar) {
                artifact signJar.outputs.files[0]
            } else {
                artifact stagingJar
            }
            artifact sourceJar
            artifact javadocJar
            artifact shadowJar
        }
    }
    
    repositories {
        if (buildType == 'RELEASE') {
            if (project.hasProperty("releaseRepo")) {
                maven {
                    credentials {
                        username = project.releaseRepoUsername
                        password = project.releaseRepoPassword
                    }
                    url project.releaseRepo
                }
            }
            if (project.hasProperty("spongeReleaseRepo")) {
                maven {
                    credentials {
                        username = project.spongeUsername
                        password = project.spongePassword
                    }
                    url project.spongeReleaseRepo
                }
            }
        } else if (project.hasProperty("spongeSnapshotRepo")) {
            maven {
                credentials {
                    username = project.spongeUsername
                    password = project.spongePassword
                }
                url project.spongeSnapshotRepo
            }
        }
    }
}