Make Gradle build VanillaGradle from source

Also: update Gradle to 8.12

.gitmodules

@@ -2,3 +2,7 @@
 	path = SpongeAPI
 	url = https://github.com/SKBotNL/SpongeAPI-CTS.git
 	branch = api-8
+[submodule "VanillaGradle"]
+	path = VanillaGradle
+	url = https://github.com/SKBotNL/VanillaGradle-CTS.git
+	branch = master

build-logic/src/main/java/org/spongepowered/gradle/impl/OutputDependenciesToJson.java

@@ -34,16 +34,12 @@ import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.component.ComponentIdentifier;
 import org.gradle.api.artifacts.component.ModuleComponentIdentifier;
 import org.gradle.api.artifacts.result.ResolvedArtifactResult;
+import org.gradle.api.file.FileCollection;
 import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.provider.MapProperty;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.SetProperty;
-import org.gradle.api.tasks.Input;
-import org.gradle.api.tasks.InputFiles;
-import org.gradle.api.tasks.Nested;
-import org.gradle.api.tasks.Optional;
-import org.gradle.api.tasks.OutputFile;
-import org.gradle.api.tasks.TaskAction;
+import org.gradle.api.tasks.*;
 
 import java.io.BufferedWriter;
 import java.io.FileInputStream;
@@ -52,6 +48,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStreamWriter;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Comparator;
@@ -161,10 +158,17 @@ public abstract class OutputDependenciesToJson extends DefaultTask {
      * Excludes configuration, to remove certain entries from dependencies and
      * transitive dependencies of {@link #getDependencies()}.
      */
-    @Input
-    @Optional
+    @Internal
     public abstract Property<Configuration> getExcludedDependencies();
 
+    @Classpath
+    @Optional
+    public FileCollection getExcludedDependencyArtifacts() {
+        return getExcludedDependencies()
+                .map(config -> (FileCollection) config)
+                .getOrElse(getProject().files());
+    }
+
     public final void excludedDependencies(final NamedDomainObjectProvider<Configuration> config) {
         this.getExcludedDependencies().set(config);
     }
@@ -204,7 +208,7 @@ public abstract class OutputDependenciesToJson extends DefaultTask {
         this.getLogger().info("Writing to {}", this.getOutputFile().get().getAsFile());
         try (
             final BufferedWriter writer = new BufferedWriter(
-                new OutputStreamWriter(new FileOutputStream(this.getOutputFile().get().getAsFile()), StandardCharsets.UTF_8))
+                new OutputStreamWriter(Files.newOutputStream(this.getOutputFile().get().getAsFile().toPath()), StandardCharsets.UTF_8))
         ) {
             OutputDependenciesToJson.GSON.toJson(manifest, writer);
         } catch (final IOException ex) {
@@ -224,7 +228,7 @@ public abstract class OutputDependenciesToJson extends DefaultTask {
 
                 // Get file input stream for reading the file content
                 final String md5hash;
-                try (final InputStream in = new FileInputStream(dependency.getFile())) {
+                try (final InputStream in = Files.newInputStream(dependency.getFile().toPath())) {
                     final MessageDigest hasher = MessageDigest.getInstance("MD5");
                     final byte[] buf = new byte[4096];
                     int read;

build.gradle.kts

@@ -1,5 +1,4 @@
 import org.spongepowered.gradle.vanilla.task.DecompileJarTask
-import java.util.Locale
 
 plugins {
     `maven-publish`
@@ -31,7 +30,7 @@ val junitVersion: String by project
 val mockitoVersion: String by project
 val checkerVersion: String by project
 
-val commonManifest = the<JavaPluginConvention>().manifest {
+val commonManifest = the<JavaPluginExtension>().manifest {
     attributes(
         "Specification-Title" to "Sponge",
         "Specification-Vendor" to "SpongePowered",
@@ -247,7 +246,7 @@ allprojects {
     apply(plugin = "net.kyori.indra.licenser.spotless")
 
     base {
-        archivesBaseName = name.toLowerCase(Locale.ENGLISH)
+        archivesName.set(name.lowercase())
     }
 
     plugins.withId("nl.skbotnl.sponge.gradle.vanilla") {
@@ -280,7 +279,7 @@ allprojects {
                     delegateBuildRunToGradle = false
                     testRunner = org.jetbrains.gradle.ext.ActionDelegationConfig.TestRunner.PLATFORM
                 }
-                (this as ExtensionAware).extensions.getByType(org.jetbrains.gradle.ext.IdeaCompilerConfiguration::class).run {
+                this.extensions.getByType(org.jetbrains.gradle.ext.IdeaCompilerConfiguration::class).run {
                     addNotNullAssertions = false
                     useReleaseOption = JavaVersion.current().isJava10Compatible
                     parallelCompilation = true
@@ -431,7 +430,7 @@ publishing {
             artifact(tasks["mixinsSourceJar"])
             artifact(tasks["accessorsSourceJar"])
             pom {
-                artifactId = project.name.toLowerCase()
+                artifactId = project.name.lowercase()
                 this.name.set(project.name)
                 this.description.set(project.description)
                 this.url.set(projectUrl)

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle.kts

@@ -1,6 +1,17 @@
 import org.spongepowered.gradle.vanilla.repository.MinecraftRepositoryExtension
 
 pluginManagement {
+    if (!file("VanillaGradle/gradle.properties").exists()) {
+        throw InvalidUserDataException("""
+        The SpongeAPI submodule required to build does not appear to be set up.
+
+        To correct this, run
+            git submodule update --init --recursive
+        from the project's checkout directory.
+    """.trimIndent())
+    }
+    includeBuild("VanillaGradle")
+
     repositories {
         mavenLocal()
         maven("https://repo.spongepowered.org/repository/maven-public/") {
@@ -10,7 +21,7 @@ pluginManagement {
 
     plugins {
         // Default plugin versions
-        id("nl.skbotnl.sponge.gradle.vanilla") version "0.2.1-SNAPSHOT"
+        id("nl.skbotnl.sponge.gradle.vanilla")
         id("com.github.johnrengelman.shadow") version "7.1.2"
         id("org.spongepowered.gradle.sponge.dev") version "2.1.1"
         id("net.kyori.indra.licenser.spotless") version "3.0.1"
@@ -55,7 +66,7 @@ if (!file("SpongeAPI/gradle.properties").exists()) {
 includeBuild("build-logic")
 includeBuild("SpongeAPI") {
     dependencySubstitution {
-        substitute(module("org.spongepowered:spongeapi")).with(project(":"))
+        substitute(module("org.spongepowered:spongeapi")).using(project(":"))
     }
 }
 include(":SpongeVanilla")
@@ -115,7 +126,7 @@ if (apiProps.exists()) {
             if (key.startsWith("api")) {
                 extraProperties[key] = value
             } else {
-                extraProperties["api${key.capitalize()}"] = value
+                extraProperties["api${key.replaceFirstChar { it.uppercase() }}"] = value
             }
         }
     }