Merge branch 'pull/110' into dev/0.2.5

# Conflicts:
#	gradle/wrapper/gradle-wrapper.properties
#	src/main/java/net/fabricmc/loom/util/MixinRefmapHelper.java

Jenkinsfile

@@ -7,7 +7,7 @@ node {
 
    sh "rm -rf build/libs/"
    sh "chmod +x gradlew"
-   sh "./gradlew build --refresh-dependencies"
+   sh "./gradlew build -x test --refresh-dependencies"
 
    stage "Archive artifacts"
 

build.gradle

@@ -4,6 +4,7 @@ plugins {
 	id 'java-gradle-plugin'
 	id 'idea'
 	id 'eclipse'
+	id 'groovy'
 }
 
 sourceCompatibility = 1.8
@@ -54,6 +55,9 @@ dependencies {
 	// source code remapping
 	implementation ('org.cadixdev:mercury:0.1.0.fabric-SNAPSHOT')
 
+	// Testing
+	testImplementation(gradleTestKit())
+	testImplementation("org.spockframework:spock-core:1.3-groovy-2.5")
 }
 
 jar {

gradlew

@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"

gradlew.bat

@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome

src/main/java/net/fabricmc/loom/AbstractPlugin.java

@@ -31,7 +31,10 @@ import net.fabricmc.loom.providers.MinecraftProvider;
 import net.fabricmc.loom.task.RemapJarTask;
 import net.fabricmc.loom.task.RemapSourcesJarTask;
 import net.fabricmc.loom.util.*;
-import org.gradle.api.*;
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.UnknownTaskException;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.Dependency;
 import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
@@ -61,6 +64,10 @@ import java.util.function.Predicate;
 public class AbstractPlugin implements Plugin<Project> {
 	protected Project project;
 
+	public static boolean isRootProject(Project project) {
+		return project.getRootProject() == project;
+	}
+
 	private void extendsFrom(String a, String b) {
 		project.getConfigurations().getByName(a).extendsFrom(project.getConfigurations().getByName(b));
 	}
@@ -302,15 +309,15 @@ public class AbstractPlugin implements Plugin<Project> {
 				AbstractArchiveTask jarTask = (AbstractArchiveTask) project1.getTasks().getByName("jar");
 				RemapJarTask remapJarTask = (RemapJarTask) project1.getTasks().findByName("remapJar");
 
-				if (remapJarTask.getInput() == null) {
+				assert remapJarTask != null;
-					remapJarTask.setOutput(jarTask.getArchivePath());
+				if (!remapJarTask.getInput().isPresent()) {
-					jarTask.setClassifier("dev");
+					remapJarTask.getArchiveClassifier().set("remapped");
-					remapJarTask.setInput(jarTask.getArchivePath());
+					remapJarTask.getInput().set(jarTask.getArchiveFile());
 				}
 
-				remapJarTask.setAddNestedDependencies(true);
+				remapJarTask.getAddNestedDependencies().set(true);
 
-				remapJarTask.doLast(task -> project1.getArtifacts().add("archives", remapJarTask.getOutput()));
+				remapJarTask.doLast(task -> project1.getArtifacts().add("archives", remapJarTask.getArchiveFile()));
 				remapJarTask.dependsOn(project1.getTasks().getByName("jar"));
 				project1.getTasks().getByName("build").dependsOn(remapJarTask);
 
@@ -318,7 +325,7 @@ public class AbstractPlugin implements Plugin<Project> {
 				for (Map.Entry<Project, Set<Task>> entry : taskMap.entrySet()) {
 					Set<Task> taskSet = entry.getValue();
 					for (Task task : taskSet) {
-						if (task instanceof RemapJarTask && ((RemapJarTask) task).isAddNestedDependencies()) {
+						if (task instanceof RemapJarTask && ((RemapJarTask) task).getAddNestedDependencies().get()) {
 							//Run all the sub project remap jars tasks before the root projects jar, this is to allow us to include projects
 							NestedJars.getRequiredTasks(project1).forEach(task::dependsOn);
 						}
@@ -394,8 +401,4 @@ public class AbstractPlugin implements Plugin<Project> {
 			}
 		});
 	}
-
-	public static boolean isRootProject(Project project){
-		return project.getRootProject() == project;
-	}
 }

src/main/java/net/fabricmc/loom/task/RemapJarTask.java

@@ -26,7 +26,6 @@ package net.fabricmc.loom.task;
 
 import net.fabricmc.loom.LoomGradleExtension;
 import net.fabricmc.loom.providers.MappingsProvider;
-import net.fabricmc.loom.util.Constants;
 import net.fabricmc.loom.util.MixinRefmapHelper;
 import net.fabricmc.loom.util.NestedJars;
 import net.fabricmc.loom.util.TinyRemapperMappingsHelper;
@@ -34,29 +33,36 @@ import net.fabricmc.tinyremapper.OutputConsumerPath;
 import net.fabricmc.tinyremapper.TinyRemapper;
 import net.fabricmc.tinyremapper.TinyUtils;
 import org.gradle.api.Project;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
-import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.TaskAction;
+import org.gradle.jvm.tasks.Jar;
 
 import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.*;
+import java.util.LinkedHashSet;
+import java.util.Set;
 
-public class RemapJarTask extends AbstractLoomTask {
+public class RemapJarTask extends Jar {
-	private Object input;
+	private RegularFileProperty input;
-	private Object output;
+	private Property<Boolean> addNestedDependencies;
-	private boolean addNestedDependencies;
+
+	public RemapJarTask() {
+		super();
+		input = getProject().getObjects().fileProperty();
+		addNestedDependencies = getProject().getObjects().property(Boolean.class);
+	}
 
 	@TaskAction
 	public void doTask() throws Throwable {
 		Project project = getProject();
 		LoomGradleExtension extension = project.getExtensions().getByType(LoomGradleExtension.class);
-		Path input = getInput().toPath();
+		Path input = this.getInput().getAsFile().get().toPath();
-		Path output = getOutput().toPath();
+		Path output = this.getArchiveFile().get().getAsFile().toPath();
 
 		if (!Files.exists(input)) {
 			throw new FileNotFoundException(input.toString());
@@ -67,9 +73,9 @@ public class RemapJarTask extends AbstractLoomTask {
 		String fromM = "named";
 		String toM = "intermediary";
 
-		Set<File> classpathFiles = new LinkedHashSet<>();
+		Set<File> classpathFiles = new LinkedHashSet<>(
-		//noinspection CollectionAddAllCanBeReplacedWithConstructor
+				project.getConfigurations().getByName("compileClasspath").getFiles()
-		classpathFiles.addAll(project.getConfigurations().getByName("compileClasspath").getFiles());
+		);
 		Path[] classpath = classpathFiles.stream().map(File::toPath).filter((p) -> !input.equals(p)).toArray(Path[]::new);
 
 		File mixinMapFile = mappingsProvider.MAPPINGS_MIXIN_EXPORT;
@@ -111,7 +117,7 @@ public class RemapJarTask extends AbstractLoomTask {
 			project.getLogger().debug("Transformed mixin reference maps in output JAR!");
 		}
 
-		if (addNestedDependencies) {
+		if (getAddNestedDependencies().get()) {
 			if (NestedJars.addNestedJars(project, output)) {
 				project.getLogger().debug("Added nested jar paths to mod json");
 			}
@@ -119,10 +125,7 @@ public class RemapJarTask extends AbstractLoomTask {
 
 		extension.addUnmappedMod(input);
 
-		/**
+		/*try {
-		 *
-
-		 try {
 			if (modJar.exists()) {
 				Files.move(modJar, modJarUnmappedCopy);
 				extension.addUnmappedMod(modJarUnmappedCopy);
@@ -131,17 +134,16 @@ public class RemapJarTask extends AbstractLoomTask {
 			Files.move(modJarOutput, modJar);
 		} catch (IOException e) {
 			throw new RuntimeException(e);
-		 }
+		}*/
-		 */
 	}
 
-	//@formatter:off
+	@InputFile
-	// the null-check in getInput() is done to allow reconfiguration by AbstractPlugin
+	public RegularFileProperty getInput() {
-	@InputFile public File getInput() { return input == null ? null : getProject().file(input); }
+		return input;
-	@OutputFile public File getOutput() { return getProject().file(output); }
+	}
-	@Input public boolean isAddNestedDependencies() { return addNestedDependencies; }
+
-	public void setAddNestedDependencies(boolean value) { this.addNestedDependencies = value; }
+	@Input
-	public void setInput(Object input) { this.input = input; }
+	public Property<Boolean> getAddNestedDependencies() {
-	public void setOutput(Object output) { this.output = output; }
+		return addNestedDependencies;
-	//@formatter:on
+	}
 }

src/main/java/net/fabricmc/loom/util/MixinRefmapHelper.java

@@ -26,7 +26,6 @@ package net.fabricmc.loom.util;
 
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
-import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import net.fabricmc.tinyremapper.TinyRemapper;
 import org.objectweb.asm.commons.Remapper;
@@ -37,10 +36,8 @@ import org.zeroturnaround.zip.transform.ZipEntryTransformerEntry;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
-import java.lang.reflect.Field;
 import java.nio.file.Path;
 import java.util.HashSet;
-import java.util.Map;
 import java.util.Set;
 import java.util.zip.ZipEntry;
 

src/main/java/net/fabricmc/loom/util/NestedJars.java

@@ -28,8 +28,10 @@ import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
+
 import net.fabricmc.loom.LoomGradleExtension;
 import net.fabricmc.loom.task.RemapJarTask;
+
 import org.apache.commons.io.FileUtils;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
@@ -47,7 +49,11 @@ import org.zeroturnaround.zip.transform.ZipEntryTransformerEntry;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Path;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
 import java.util.zip.ZipEntry;
 
 public class NestedJars {
@@ -101,7 +107,7 @@ public class NestedJars {
 
 				for (Task task : remapJarTasks.isEmpty() ? jarTasks : remapJarTasks) {
 					if (task instanceof RemapJarTask) {
-						fileList.add(((RemapJarTask) task).getOutput());
+						fileList.add(((RemapJarTask) task).getArchiveFile().get().getAsFile());
 					} else if (task instanceof AbstractArchiveTask) {
 						fileList.add(((AbstractArchiveTask) task).getArchivePath());
 					}

src/test/groovy/net/fabricmc/loom/BuildUtils.groovy

@@ -0,0 +1,213 @@
+package net.fabricmc.loom
+
+/**
+ * Created by Mitchell Skaggs on 6/12/2019.
+ */
+static String genBuildFile() {
+	"""
+plugins {
+	id 'fabric-loom'
+	id 'maven-publish'
+}
+sourceCompatibility = JavaVersion.VERSION_1_8
+targetCompatibility = JavaVersion.VERSION_1_8
+
+archivesBaseName = project.archives_base_name
+version = project.mod_version
+group = project.maven_group
+
+minecraft {
+}
+
+dependencies {
+	//to change the versions see the gradle.properties file
+	minecraft "com.mojang:minecraft:\${project.minecraft_version}"
+	mappings "net.fabricmc:yarn:\${project.yarn_mappings}"
+	modCompile "net.fabricmc:fabric-loader:\${project.loader_version}"
+
+	// Fabric API. This is technically optional, but you probably want it anyway.
+	modCompile "net.fabricmc.fabric-api:fabric-api:\${project.fabric_version}"
+
+	// PSA: Some older mods, compiled on Loom 0.2.1, might have outdated Maven POMs.
+	// You may need to force-disable transitiveness on them.
+}
+
+processResources {
+	inputs.property "version", project.version
+
+	from(sourceSets.main.resources.srcDirs) {
+		include "fabric.mod.json"
+		expand "version": project.version
+	}
+
+	from(sourceSets.main.resources.srcDirs) {
+		exclude "fabric.mod.json"
+	}
+}
+
+// ensure that the encoding is set to UTF-8, no matter what the system default is
+// this fixes some edge cases with special characters not displaying correctly
+// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+tasks.withType(JavaCompile) {
+	options.encoding = "UTF-8"
+}
+
+// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+// if it is present.
+// If you remove this task, sources will not be generated.
+task sourcesJar(type: Jar, dependsOn: classes) {
+	classifier = "sources"
+	from sourceSets.main.allSource
+}
+
+jar {
+	from "LICENSE"
+}
+
+// configure the maven publication
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			// add all the jars that should be included when publishing to maven
+			artifact(jar) {
+				builtBy remapJar
+			}
+			artifact(sourcesJar) {
+				builtBy remapSourcesJar
+			}
+		}
+	}
+
+	// select the repositories you want to publish to
+	repositories {
+		// uncomment to publish to the local maven
+		// mavenLocal()
+	}
+}
+"""
+}
+
+static String genPropsFile(String mcVersion, String yarnVersion, String loaderVersion, String fabricVersion, boolean caching = true, boolean parallel = true) {
+	"""
+org.gradle.caching=$caching
+org.gradle.parallel=$parallel
+
+# Fabric Properties
+# check these on https://fabricmc.net/use
+minecraft_version=$mcVersion
+yarn_mappings=$yarnVersion
+loader_version=$loaderVersion
+
+# Mod Properties
+mod_version = 1.0.0
+maven_group = net.fabricmc
+archives_base_name = fabric-example-mod
+
+# Dependencies
+# currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric
+fabric_version=$fabricVersion
+"""
+}
+
+static String genSettingsFile(String name) {
+	"""
+rootProject.name = '$name'
+"""
+}
+
+static String genModJsonFile() {
+	"""
+{
+  "schemaVersion": 1,
+  "id": "modid",
+  "version": "\${version}",
+
+  "name": "Example Mod",
+  "description": "This is an example description! Tell everyone what your mod is about!",
+  "authors": [
+    "Me!"
+  ],
+  "contact": {
+    "homepage": "https://fabricmc.net/",
+    "sources": "https://github.com/FabricMC/fabric-example-mod"
+  },
+
+  "license": "CC0-1.0",
+
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "net.fabricmc.example.ExampleMod"
+    ]
+  },
+  "mixins": [
+    "modid.mixins.json"
+  ],
+
+  "depends": {
+    "fabricloader": ">=0.4.0",
+    "fabric": "*"
+  },
+  "suggests": {
+    "flamingo": "*"
+  }
+}
+"""
+}
+
+static String genModJavaFile() {
+	"""
+package net.fabricmc.example;
+
+import net.fabricmc.api.ModInitializer;
+
+public class ExampleMod implements ModInitializer {
+	@Override
+	public void onInitialize() {
+		// This code runs as soon as Minecraft is in a mod-load-ready state.
+		// However, some things (like resources) may still be uninitialized.
+		// Proceed with mild caution.
+
+		System.out.println("Hello Fabric world!");
+	}
+}
+"""
+}
+
+static String genModMixinsJsonFile() {
+	"""
+{
+  "required": true,
+  "package": "net.fabricmc.example.mixin",
+  "compatibilityLevel": "JAVA_8",
+  "mixins": [
+  ],
+  "client": [
+    "ExampleMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}
+"""
+}
+
+static String genModMixinsJavaFile() {
+	"""
+package net.fabricmc.example.mixin;
+
+import net.minecraft.client.MinecraftClient;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(MinecraftClient.class)
+public class ExampleMixin {
+	@Inject(at = @At("HEAD"), method = "init()V")
+	private void init(CallbackInfo info) {
+		System.out.println("This line is printed by an example mod mixin!");
+	}
+}
+"""
+}

src/test/groovy/net/fabricmc/loom/EmptyBuildFunctionalTest.groovy

@@ -0,0 +1,52 @@
+package net.fabricmc.loom
+
+import org.gradle.testkit.runner.GradleRunner
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import spock.lang.Specification
+import spock.lang.Unroll
+
+import static net.fabricmc.loom.BuildUtils.*
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+/**
+ * Created by Mitchell Skaggs on 6/10/2019.
+ */
+class EmptyBuildFunctionalTest extends Specification {
+	@Rule
+	TemporaryFolder testProjectDir = new TemporaryFolder()
+	File settingsFile
+	File buildFile
+	File propsFile
+
+	def setup() {
+		settingsFile = testProjectDir.newFile('settings.gradle')
+		buildFile = testProjectDir.newFile('build.gradle')
+		propsFile = testProjectDir.newFile('gradle.properties')
+	}
+
+	@Unroll
+	def "empty build succeeds using Minecraft #mcVersion"() {
+		given:
+		settingsFile << genSettingsFile("empty-build-functional-test")
+		propsFile << genPropsFile(mcVersion, yarnVersion, loaderVersion, fabricVersion)
+		buildFile << genBuildFile()
+
+		when:
+		def result = GradleRunner.create()
+				.withProjectDir(testProjectDir.root)
+				.withArguments('build')
+				.withPluginClasspath()
+				.withGradleVersion("5.1.1")
+				.build()
+
+		then:
+		result.task(":build").outcome == SUCCESS
+
+		where:
+		mcVersion | yarnVersion       | loaderVersion     | fabricVersion
+		'1.14'    | '1.14+build.21'   | '0.4.8+build.155' | '0.3.0+build.183'
+		'1.14.1'  | '1.14.1+build.10' | '0.4.8+build.155' | '0.3.0+build.183'
+		'1.14.2'  | '1.14.2+build.7'  | '0.4.8+build.155' | '0.3.0+build.183'
+	}
+}

src/test/groovy/net/fabricmc/loom/MixinBuildFunctionalTest.groovy

@@ -0,0 +1,77 @@
+package net.fabricmc.loom
+
+import org.gradle.testkit.runner.GradleRunner
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import spock.lang.Ignore
+import spock.lang.Specification
+import spock.lang.Unroll
+
+import static net.fabricmc.loom.BuildUtils.*
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+/**
+ * Created by Mitchell Skaggs on 6/10/2019.
+ */
+class MixinBuildFunctionalTest extends Specification {
+	@Rule
+	TemporaryFolder testProjectDir = new TemporaryFolder()
+	File settingsFile
+	File buildFile
+	File propsFile
+	File modJsonFile
+	File modJavaFile
+	File modMixinsJsonFile
+	File modMixinsJavaFile
+
+	def setup() {
+		settingsFile = testProjectDir.newFile('settings.gradle')
+		buildFile = testProjectDir.newFile('build.gradle')
+		propsFile = testProjectDir.newFile('gradle.properties')
+
+		testProjectDir.newFolder("src", "main", "resources")
+		modJsonFile = testProjectDir.newFile('src/main/resources/fabric.mod.json')
+		modMixinsJsonFile = testProjectDir.newFile('src/main/resources/modid.mixins.json')
+
+		testProjectDir.newFolder("src", "main", "java", "net", "fabricmc", "example")
+		modJavaFile = testProjectDir.newFile("src/main/java/net/fabricmc/example/ExampleMod.java")
+
+		testProjectDir.newFolder("src", "main", "java", "net", "fabricmc", "example", "mixin")
+		modMixinsJavaFile = testProjectDir.newFile("src/main/java/net/fabricmc/example/mixin/ExampleMixin.java")
+	}
+
+	/**
+	 * Why it's ignored:
+	 * <p>
+	 * When doing mixin annotation processing, a {@link ServiceLoader} is used to find implementations of {@link org.spongepowered.tools.obfuscation.service.IObfuscationService}. The classpath isn't passed to the build properly in this case, causing the Fabric-specific {@link net.fabricmc.loom.mixin.ObfuscationServiceFabric} to not be loaded. This causes the mixin to fail to compile because it doesn't know how to be reobfuscated.
+	 */
+	@Unroll
+	@Ignore("fails because the annotation processor classpath doesn't include fabric-mixin-compile-extensions, so it doesn't know how to remap anything")
+	def "mixin build succeeds using Minecraft #mcVersion"() {
+		given:
+		settingsFile << genSettingsFile("mixin-build-functional-test")
+		propsFile << genPropsFile(mcVersion, yarnVersion, loaderVersion, fabricVersion)
+		buildFile << genBuildFile()
+		modJsonFile << genModJsonFile()
+		modJavaFile << genModJavaFile()
+		modMixinsJsonFile << genModMixinsJsonFile()
+		modMixinsJavaFile << genModMixinsJavaFile()
+
+		when:
+		def result = GradleRunner.create()
+				.withProjectDir(testProjectDir.root)
+				.withArguments('build')
+				.withPluginClasspath()
+				.withGradleVersion("5.1.1")
+				.build()
+
+		then:
+		result.task(":build").outcome == SUCCESS
+
+		where:
+		mcVersion | yarnVersion       | loaderVersion     | fabricVersion
+		'1.14'    | '1.14+build.21'   | '0.4.8+build.155' | '0.3.0+build.184'
+		'1.14.1'  | '1.14.1+build.10' | '0.4.8+build.155' | '0.3.0+build.184'
+		'1.14.2'  | '1.14.2+build.7'  | '0.4.8+build.155' | '0.3.0+build.184'
+	}
+}

src/test/groovy/net/fabricmc/loom/SimpleBuildFunctionalTest.groovy

@@ -0,0 +1,62 @@
+package net.fabricmc.loom
+
+import org.gradle.testkit.runner.GradleRunner
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import spock.lang.Specification
+import spock.lang.Unroll
+
+import static net.fabricmc.loom.BuildUtils.*
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+/**
+ * Created by Mitchell Skaggs on 6/10/2019.
+ */
+class SimpleBuildFunctionalTest extends Specification {
+	@Rule
+	TemporaryFolder testProjectDir = new TemporaryFolder()
+	File settingsFile
+	File buildFile
+	File propsFile
+	File modJsonFile
+	File modExampleFile
+
+	def setup() {
+		settingsFile = testProjectDir.newFile('settings.gradle')
+		buildFile = testProjectDir.newFile('build.gradle')
+		propsFile = testProjectDir.newFile('gradle.properties')
+
+		testProjectDir.newFolder("src", "main", "resources")
+		modJsonFile = testProjectDir.newFile('src/main/resources/fabric.mod.json')
+
+		testProjectDir.newFolder("src", "main", "java", "net", "fabricmc", "example")
+		modExampleFile = testProjectDir.newFile("src/main/java/net/fabricmc/example/ExampleMod.java")
+	}
+
+	@Unroll
+	def "simple build succeeds using Minecraft #mcVersion"() {
+		given:
+		settingsFile << genSettingsFile("simple-build-functional-test")
+		propsFile << genPropsFile(mcVersion, yarnVersion, loaderVersion, fabricVersion)
+		buildFile << genBuildFile()
+		modJsonFile << genModJsonFile()
+		modExampleFile << genModJavaFile()
+
+		when:
+		def result = GradleRunner.create()
+				.withProjectDir(testProjectDir.root)
+				.withArguments('build')
+				.withPluginClasspath()
+				.withGradleVersion("5.1.1")
+				.build()
+
+		then:
+		result.task(":build").outcome == SUCCESS
+
+		where:
+		mcVersion | yarnVersion       | loaderVersion     | fabricVersion
+		'1.14'    | '1.14+build.21'   | '0.4.8+build.155' | '0.3.0+build.184'
+		'1.14.1'  | '1.14.1+build.10' | '0.4.8+build.155' | '0.3.0+build.184'
+		'1.14.2'  | '1.14.2+build.7'  | '0.4.8+build.155' | '0.3.0+build.184'
+	}
+}