Extensible manifest format.

samples/mixed/bukkit-plugins/hello-world/build.gradle.kts

@@ -6,3 +6,7 @@ dependencies {
   implementation(project(":other-library"))
   implementation(project(":bukkit-plugins:common-library"))
 }
+
+concrete {
+  dependency(project(":bukkit-plugins:goodbye-world"))
+}

src/main/kotlin/gay/pizza/foundation/concrete/ConcretePluginExtension.kt

@@ -0,0 +1,12 @@
+package gay.pizza.foundation.concrete
+
+import org.gradle.api.DomainObjectSet
+import org.gradle.api.Project
+
+interface ConcretePluginExtension {
+  val dependencies: DomainObjectSet<Project>
+
+  fun dependency(project: Project) {
+    dependencies.add(project)
+  }
+}

src/main/kotlin/gay/pizza/foundation/concrete/ConcretePluginPlugin.kt

@@ -9,6 +9,8 @@ class ConcretePluginPlugin : ConcreteBaseBukkitPlugin() {
   override fun apply(project: Project) {
     super.apply(project)
 
+    project.extensions.create("concrete", ConcretePluginExtension::class.java)
+
     project.plugins.apply("com.github.johnrengelman.shadow")
 
     // During IDEA project import, if this code is active, it will print warnings.

src/main/kotlin/gay/pizza/foundation/concrete/ConcreteRootExtension.kt

@@ -2,7 +2,7 @@ package gay.pizza.foundation.concrete
 
 import org.gradle.api.provider.Property
 
-interface ConcreteExtension {
+interface ConcreteRootExtension {
   val paperServerVersionGroup: Property<String>
   val paperApiVersion: Property<String>
   val minecraftServerPath: Property<String>

src/main/kotlin/gay/pizza/foundation/concrete/ConcreteRootPlugin.kt

@@ -9,7 +9,7 @@ import java.nio.file.Paths
 class ConcreteRootPlugin : Plugin<Project> {
   override fun apply(project: Project) {
     project.apply(plugin = "base")
-    project.extensions.create<ConcreteExtension>("concrete")
+    project.extensions.create<ConcreteRootExtension>("concrete")
     val setupPaperServer = project.tasks.create<SetupPaperServer>("setupPaperServer")
     val runPaperServer = project.tasks.create<RunPaperServer>("runPaperServer")
     runPaperServer.dependsOn(setupPaperServer)

src/main/kotlin/gay/pizza/foundation/concrete/ExtensibleManifest.kt

@@ -0,0 +1,55 @@
+package gay.pizza.foundation.concrete
+
+/**
+ * The extensible update manifest format.
+ */
+data class ExtensibleManifest(
+  /**
+   * The items the manifest describes.
+   */
+  val items: List<ExtensibleManifestItem>
+)
+
+/**
+ * An item in the update manifest.
+ */
+data class ExtensibleManifestItem(
+  /**
+   * The name of the item.
+   */
+  val name: String,
+  /**
+   * The type of item, for example "bukkit-plugin"
+   */
+  val type: String,
+  /**
+   * The version of the item.
+   */
+  val version: String,
+  /**
+   * The dependencies of the item.
+   */
+  val dependencies: List<String>,
+  /**
+   * The files that are required to install the item.
+   */
+  val files: List<String>
+)
+
+/**
+ * A file built from the item.
+ */
+data class ExtensibleManifestItemFile(
+  /**
+   * The name of the file.
+   */
+  val name: String,
+  /**
+   * A type of file. For example: "plugin-jar".
+   */
+  val type: String,
+  /**
+   * The relative path to download the file.
+   */
+  val path: String
+)

src/main/kotlin/gay/pizza/foundation/concrete/Globals.kt

@@ -1,7 +1,9 @@
 package gay.pizza.foundation.concrete
 
 import com.google.gson.Gson
+import com.google.gson.GsonBuilder
 
 object Globals {
-  val gson = Gson()
+  val gsonPretty: Gson = GsonBuilder().setPrettyPrinting().create()
+  val gson: Gson = Gson()
 }

src/main/kotlin/gay/pizza/foundation/concrete/RunPaperServer.kt

@@ -11,7 +11,7 @@ open class RunPaperServer : RunMinecraftServer() {
 
   @Internal
   override fun getServerDirectory(): File {
-    val concrete = project.extensions.getByType<ConcreteExtension>()
+    val concrete = project.extensions.getByType<ConcreteRootExtension>()
     return project.file(concrete.minecraftServerPath.get())
   }
 

src/main/kotlin/gay/pizza/foundation/concrete/SetupMinecraftServer.kt

@@ -34,7 +34,7 @@ abstract class SetupMinecraftServer : DefaultTask() {
       Files.createSymbolicLink(pluginLinkFile.toPath(), pluginJarFile.toPath())
     }
 
-    val concrete = project.extensions.getByType<ConcreteExtension>()
+    val concrete = project.extensions.getByType<ConcreteRootExtension>()
     if (concrete.acceptServerEula.isPresent && concrete.acceptServerEula.get()) {
       val writer = minecraftServerDirectory.resolve("eula.txt").bufferedWriter()
       val properties = Properties()

src/main/kotlin/gay/pizza/foundation/concrete/SetupPaperServer.kt

@@ -18,7 +18,7 @@ open class SetupPaperServer : SetupMinecraftServer() {
 
   @TaskAction
   fun setupPaperServer() {
-    val concrete = project.extensions.getByType<ConcreteExtension>()
+    val concrete = project.extensions.getByType<ConcreteRootExtension>()
     val minecraftServerDirectory = getServerDirectory()
     val paperJarFile = project.file("${minecraftServerDirectory}/paper.jar")
     if (!paperJarFile.exists() || shouldUpdatePaperServer) {
@@ -50,7 +50,7 @@ open class SetupPaperServer : SetupMinecraftServer() {
 
   @Internal
   override fun getServerDirectory(): File {
-    val concrete = project.extensions.getByType<ConcreteExtension>()
+    val concrete = project.extensions.getByType<ConcreteRootExtension>()
     return project.file(concrete.minecraftServerPath.get())
   }
 }

src/main/kotlin/gay/pizza/foundation/concrete/UpdateManifestTask.kt

@@ -9,10 +9,10 @@ open class UpdateManifestTask : DefaultTask() {
   @TaskAction
   fun update() {
     val manifestsDir = ensureManifestsDirectory()
-    val updateFile = manifestsDir.resolve("update.json")
-    val rootPath = project.rootProject.rootDir.toPath()
-    val updateManifest = project.findPluginProjects().mapNotNull { project ->
+    val rootPath = project.projectDir.toPath()
+    val legacyUpdateManifest = project.findPluginProjects().mapNotNull { project ->
       val paths = project.shadowJarOutputs!!.allFilesRelativeToPath(rootPath)
+
       if (paths.isNotEmpty()) {
         project.name to mapOf(
           "version" to project.version,
@@ -21,7 +21,29 @@ open class UpdateManifestTask : DefaultTask() {
       } else null
     }.toMap()
 
-    Files.writeString(updateFile, Globals.gson.toJson(updateManifest))
+    val legacyUpdateFile = manifestsDir.resolve("update.json")
+    Files.writeString(legacyUpdateFile, Globals.gson.toJson(legacyUpdateManifest))
+
+    val extensibleUpdateManifestItems = project.findPluginProjects().mapNotNull { project ->
+      val paths = project.shadowJarOutputs!!.allFilesRelativeToPath(rootPath)
+
+      val dependencies = project.concretePluginExtension.dependencies.map { it.name }
+      ExtensibleManifestItem(
+        name = project.name,
+        type = "bukkit-plugin",
+        version = project.version.toString(),
+        dependencies = dependencies,
+        files = paths.map { it.toUnixString() }
+      )
+    }
+
+    val extensibleUpdateManifest = ExtensibleManifest(
+      items = extensibleUpdateManifestItems
+    )
+
+    val extensibleUpdateManifestFile = manifestsDir.resolve("manifest.json")
+    Files.writeString(
+      extensibleUpdateManifestFile, Globals.gsonPretty.toJson(extensibleUpdateManifest) + "\n")
   }
 
   private fun ensureManifestsDirectory(): Path {

src/main/kotlin/gay/pizza/foundation/concrete/extensions.kt

@@ -30,20 +30,23 @@ internal val Project.shadowJarTask: ShadowJar?
 internal val Project.shadowJarOutputs: TaskOutputs?
   get() = shadowJarTask?.outputs
 
-internal val Project.concreteRootExtension: ConcreteExtension
+internal val Project.concreteRootExtension: ConcreteRootExtension
   get() = findTargetParent(
-    valid = { extensions.findByType(ConcreteExtension::class.java) != null },
-    extract = { extensions.findByType(ConcreteExtension::class.java)!! },
+    valid = { extensions.findByType(ConcreteRootExtension::class.java) != null },
+    extract = { extensions.findByType(ConcreteRootExtension::class.java)!! },
     error = { "Failed to find concrete root. Did you apply the concrete root plugin?" }
   )
 
+internal val Project.concretePluginExtension: ConcretePluginExtension
+  get() = extensions.getByType(ConcretePluginExtension::class.java)
+
 /**
  * Finds the concrete root project, which is the first project in the project hierarchy
  * that has the concrete extension.
  */
 internal val Project.concreteRootProject: Project
   get() = findTargetParent(
-    valid = { extensions.findByType(ConcreteExtension::class.java) != null },
+    valid = { extensions.findByType(ConcreteRootExtension::class.java) != null },
     extract = { this },
     error = { "Failed to find concrete root. Did you apply the concrete root plugin?" }
   )