build.gradle

// Gradle repositories and dependencies
buildscript {
    repositories {
        gradlePluginPortal()
        mavenCentral()
    }
    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'
        classpath 'com.guardsquare:proguard-gradle:' + (JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_11) ? '7.2.0' : '7.1.0')
    }
}

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 = 'net.fabricmc'
archivesBaseName = 'sponge-mixin'
version = buildVersion + "+mixin." + upstreamMixinVersion


def ENV = System.getenv()
if (!ENV.CI) {
    version = version + "-local"
}

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

// Define variables
ext.asmVersion = project.hasProperty("asmVersion") ? asmVersion : '9.0'
ext.legacyForgeAsmVersion = project.hasProperty("legacyForgeAsmVersion") ? asmVersion : '5.0.3'

// Minimum version of Java required
sourceCompatibility = '1.8'
targetCompatibility = '1.8'

java {
    modularity.inferModulePath = false
}

// Project repositories
repositories {
    mavenCentral()
    maven {
        name = 'minecraft'
        url = 'https://libraries.minecraft.net/'
    }
    maven {
        name = 'Fabric'
        url = 'https://maven.fabricmc.net/'
    }
    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
    modlauncherImplementation   .extendsFrom implementation
    modlauncher9Implementation  .extendsFrom modlauncherImplementation
    modularityImplementation    .extendsFrom modlauncher9Implementation
    modularityCompileOnly       .extendsFrom compileOnly

    proguard {
        extendsFrom fernflowerImplementation
        extendsFrom launchwrapperImplementation
        extendsFrom modlauncherImplementation
        extendsFrom compileClasspath
    }
}

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 = '1.8'
    }
    fernflower {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.6'
        ext.modularityExcluded = true
    }
    agent {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.6'
    }
    bridge {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.8'
        ext.modularityExcluded = true
    }
    example {
        compileClasspath += main.output
        compileClasspath += ap.output
        ext.modularityExcluded = true
    }
    test {
        ext.modularityExcluded = true
    }
    launchwrapper {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.8'
    }
    modlauncher {
        compileClasspath += main.output
        ext.languageVersion = 8
        ext.compatibility = '1.8'
    }
    modlauncher4 {
        compileClasspath += main.output
        compileClasspath += modlauncher.output
        ext.languageVersion = 8
        ext.compatibility = '1.8'
    }
    modlauncher9 {
        ext.languageVersion = 16
        compileClasspath += main.output
        compileClasspath += modlauncher.output
    }
    modularity {
        ext.languageVersion = 16
        ext.modularityExcluded = true // don't add ourselves
    }
}

// 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
    def gson = 'com.google.code.gson:gson:2.2.4'

    stagingJar guava
    stagingJar gson

    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
    apImplementation gson

    // Fernflower decompiler
    fernflowerImplementation 'org.jetbrains:intellij-fernflower:1.0.0.9'

    // LegacyLauncher service
    launchwrapperImplementation ('net.minecraft:launchwrapper:1.11') {
        exclude module: 'lwjgl'
        exclude module: 'asm-debug-all'
        exclude module: 'jopt-simple'
    }
    
    modlauncherImplementation 'net.sf.jopt-simple:jopt-simple:5.0.4'
    modlauncherCompileOnly 'org.apache.logging.log4j:log4j-core:2.0-beta9'
    modlauncherImplementation ("cpw.mods:modlauncher:$legacyModlauncherVersion") {
        exclude module: 'asm'
        exclude module: 'asm-analysis'
        exclude module: 'asm-commons'
        exclude module: 'asm-tree'
        exclude module: 'jopt-simple'
    }
    
    modlauncher4Implementation ("cpw.mods:modlauncher:$legacyModlauncherVersion") {
        exclude module: 'asm'
        exclude module: 'asm-analysis'
        exclude module: 'asm-commons'
        exclude module: 'asm-tree'
        exclude module: 'jopt-simple'
    }
    
    modlauncher9Implementation ("cpw.mods:modlauncher:$modlauncherVersion") {
        exclude module: 'jopt-simple'
    }
    modlauncher9Implementation 'cpw.mods:securejarhandler:0.9.+'
    
    // 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"
    
    modularityCompileOnly 'org.apache.logging.log4j:log4j-core:2.11.2'
}

javadoc {
    exclude '**/throwables'
    classpath += sourceSets.legacy.output
    source sourceSets.ap.allJava
    options.encoding = 'UTF-8'
    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 {
            // Can't include old modlauncher because it causes issues with modules
            entries.removeAll { it.kind == 'lib' && it.path =~ ~/modlauncher-$legacyModlauncherVersion/ }
            entries.removeAll { it.kind == 'src' && it.path =~ ~/modlauncher4/ }
            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 compileModlauncher4Java, compileModlauncher9Java, compileLaunchwrapperJava
}

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

// License header formatting
license {
    ext {
        name = "Mixin"
        organization = "SpongePowered"
        url = "https://www.spongepowered.org"
    }
    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'
}

def modularityInputs = objects.fileCollection()

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
    }
    def modularityExcluded = set.ext.has("modularityExcluded") && set.ext.modularityExcluded
    if (!modularityExcluded) {
        project.sourceSets.modularity {
            compileClasspath += set.output
        }
        modularityInputs.from set.output
    }
}}

compileModularityJava {
    inputs.files(modularityInputs)
    doFirst {
        options.compilerArgs = [
            '--module-path', classpath.asPath,
            '--patch-module', "org.spongepowered.mixin=${modularityInputs.collect { it.absolutePath }.join(File.pathSeparator)}"
        ]
    }
}

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,
        "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
    )
    
    mergeServiceFiles()
    relocate 'com.google', 'org.spongepowered.include.com.google'
    archiveClassifier = "staging"
}

File proguardFile = file("build/libs/sponge-mixin-${version}.jar")

task stagingProguardJar(type: proguard.gradle.ProGuardTask, dependsOn: stagingJar) {
    doFirst {
        configurations.proguard.resolve().forEach {
            libraryjars it
        }
    }

    outputs.upToDateWhen { false }

    libraryjars JavaVersion.current().java9Compatible ? "${System.getProperty('java.home')}/jmods" : "${System.getProperty('java.home')}/lib/rt.jar"

    injars stagingJar.archiveFile
    outjars proguardFile
    configuration file("proguard.conf")
}
build.dependsOn stagingProguardJar

// 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
    archiveClassifier = 'processor'
}
build.dependsOn(shadowJar)

// 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.archiveClassifier = new Date().format('yyyyMMddHHmmss')
    }
}

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

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

artifacts {
    archives stagingJar
    archives sourceJar
    archives javadocJar
    archives shadowJar
}

ext.excludePomDeps = [
    'fernflower',
    'jarjar',
    'hamcrest-library',
    'junit',
    'mockito-core',
    'mixin-asm-debug-all',
    'log4j-core'
]

publishing {
    publications {
        developer(MavenPublication) { publication ->
            groupId project.group
            artifactId project.archivesBaseName
            version project.version

            artifact sourceJar
            artifact javadocJar
            artifact(proguardFile) {
                builtBy stagingProguardJar
                classifier = null
            }

            // https://issues.gradle.org/browse/GRADLE-2966
            pom.withXml {
                def dependenciesNode = asNode().appendNode('dependencies')

                configurations.runtimeClasspath.allDependencies.each {
                    if (it.group != null && it.name != null && !excludePomDeps.contains(it.name)) {
                        def dependencyNode = dependenciesNode.appendNode('dependency')
                        dependencyNode.appendNode('groupId', it.group)
                        dependencyNode.appendNode('artifactId', it.name)
                        dependencyNode.appendNode('version', it.version)

                        if (it.excludeRules.size() > 0) {
                            def exclusionsNode = dependencyNode.appendNode('exclusions')
                            it.excludeRules.each { rule ->
                                def exclusionNode = exclusionsNode.appendNode('exclusion')
                                exclusionNode.appendNode('groupId', rule.group)
                                exclusionNode.appendNode('artifactId', rule.module)
                            }
                        }
                    }
                }
            }
        }
    }

    repositories {
        if (ENV.MAVEN_URL) {
            maven {
                url ENV.MAVEN_URL
                credentials {
                    username ENV.MAVEN_USERNAME
                    password ENV.MAVEN_PASSWORD
                }
            }
        }
    }
}

// A task to ensure that the version being released has not already been released.
task checkVersion {
    doFirst {
        def xml = new URL("https://maven.fabricmc.net/net/fabricmc/sponge-mixin/maven-metadata.xml").text
        def metadata = new XmlSlurper().parseText(xml)
        def versions = metadata.versioning.versions.version*.text();
        if (versions.contains(version)) {
            throw new RuntimeException("${version} has already been released!")
        }
    }
}

publish.mustRunAfter checkVersion