v0.16.0

README.md

@@ -5,4 +5,3 @@ Concrete is a Gradle plugin for Bukkit projects. Originally spawned out of the G
 ## Contributors
 
 - [@azenla](https://github.com/azenla)
-- [@kubeliv](https://github.com/kubeliv)

build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
 }
 
 group = "gay.pizza.foundation"
-version = "0.11.0"
+version = "0.16.0"
 
 repositories {
   mavenCentral()
@@ -17,9 +17,9 @@ repositories {
 }
 
 dependencies {
-  implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.10")
-  implementation("org.jetbrains.kotlin:kotlin-serialization:1.8.10")
-  implementation("gradle.plugin.com.github.johnrengelman:shadow:7.1.2")
+  implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.21")
+  implementation("org.jetbrains.kotlin:kotlin-serialization:1.8.21")
+  implementation("com.github.johnrengelman:shadow:8.1.1")
   implementation("com.google.code.gson:gson:2.10.1")
 
   // Implementation of crypto used in smart downloader.
@@ -36,7 +36,7 @@ gradlePlugin {
       implementationClass = "gay.pizza.foundation.concrete.ConcreteRootPlugin"
 
       displayName = "Concrete Root"
-      description = "Concrete project root."
+      description = "Gradle conventions for Foundation Bukkit plugins. Root project plugin."
     }
 
     create("concrete-base") {
@@ -44,7 +44,7 @@ gradlePlugin {
       implementationClass = "gay.pizza.foundation.concrete.ConcreteBasePlugin"
 
       displayName = "Concrete Base"
-      description = "Concrete project base."
+      description = "Gradle conventions for Foundation Bukkit plugins. Base project plugin."
     }
 
     create("concrete-library") {
@@ -52,7 +52,7 @@ gradlePlugin {
       implementationClass = "gay.pizza.foundation.concrete.ConcreteLibraryPlugin"
 
       displayName = "Concrete Library"
-      description = "Concrete project library."
+      description = "Gradle conventions for Foundation Bukkit plugins. Library project plugin."
     }
 
     create("concrete-plugin") {
@@ -60,7 +60,7 @@ gradlePlugin {
       implementationClass = "gay.pizza.foundation.concrete.ConcretePluginPlugin"
 
       displayName = "Concrete Library"
-      description = "Concrete project plugin."
+      description = "Gradle conventions for Foundation Bukkit plugins. Plugin project plugin."
     }
 
     forEach { declaration ->
@@ -128,7 +128,7 @@ publishing {
 }
 
 tasks.withType<Wrapper> {
-  gradleVersion = "7.6"
+  gradleVersion = "8.1.1"
 }
 
 java {

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-8.1.1-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -144,7 +144,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045 
+        # shellcheck disable=SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -152,7 +152,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045 
+        # shellcheck disable=SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac

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

@@ -2,9 +2,10 @@ plugins {
   id("gay.pizza.foundation.concrete-root")
 }
 
-concrete {
+concreteRoot {
   minecraftServerPath.set("server")
   paperServerVersionGroup.set("1.19")
   paperApiVersion.set("1.19.3-R0.1-SNAPSHOT")
   acceptServerEula.set(true)
+  expansiveItemInclusion.set(true)
 }

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

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

samples/mixed/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

samples/mixed/gradlew

@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,10 +80,10 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
@@ -143,12 +143,16 @@ fi
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac

samples/mixed/gradlew.bat

@@ -26,6 +26,7 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 

samples/mixed/other-library/build.gradle.kts

@@ -1,3 +1,10 @@
 plugins {
   id("gay.pizza.foundation.concrete-base")
 }
+
+concreteItem {
+  type.set("library")
+  fileInclusion {
+    tasks.jar.get().outputs.files.associateWith { "library-jar" }
+  }
+}

samples/shared/build.gradle.kts

@@ -3,7 +3,7 @@ plugins {
   id("gay.pizza.foundation.concrete-plugin")
 }
 
-concrete {
+concreteRoot {
   minecraftServerPath.set("server")
   paperServerVersionGroup.set("1.19")
   paperApiVersion.set("1.19.3-R0.1-SNAPSHOT")

samples/shared/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

samples/shared/gradlew

@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,10 +80,10 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
@@ -143,12 +143,16 @@ fi
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac

samples/shared/gradlew.bat

@@ -26,6 +26,7 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 

samples/simple/build.gradle.kts

@@ -2,7 +2,7 @@ plugins {
   id("gay.pizza.foundation.concrete-root")
 }
 
-concrete {
+concreteRoot {
   minecraftServerPath.set("server")
   paperServerVersionGroup.set("1.19")
   paperApiVersion.set("1.19.3-R0.1-SNAPSHOT")

samples/simple/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

samples/simple/gradlew

@@ -55,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,10 +80,10 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
@@ -143,12 +143,16 @@ fi
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac

samples/simple/gradlew.bat

@@ -26,6 +26,7 @@ if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 

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

@@ -4,6 +4,7 @@ import org.gradle.api.JavaVersion
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.plugins.JavaPluginExtension
+import org.gradle.kotlin.dsl.create
 import org.gradle.kotlin.dsl.getByType
 import org.gradle.kotlin.dsl.withType
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
@@ -40,5 +41,7 @@ open class ConcreteBasePlugin : Plugin<Project> {
         }
       }
     }
+
+    project.extensions.create<ConcreteItemExtension>("concreteItem")
   }
 }

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

@@ -0,0 +1,21 @@
+package gay.pizza.foundation.concrete
+
+import org.gradle.api.DomainObjectSet
+import org.gradle.api.Project
+import org.gradle.api.provider.Property
+import java.io.File
+
+interface ConcreteItemExtension {
+  val type: Property<String>
+  val version: Property<String>
+  val dependencies: DomainObjectSet<Project>
+  val fileInclusion: Property<() -> Map<File, String>>
+
+  fun dependency(project: Project) {
+    dependencies.add(project)
+  }
+
+  fun fileInclusion(inclusion: () -> Map<File, String>) {
+    fileInclusion.set(inclusion)
+  }
+}

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

@@ -2,9 +2,10 @@ 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>
   val acceptServerEula: Property<Boolean>
+  val expansiveItemInclusion: Property<Boolean>
 }

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>("concreteRoot")
     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.
+   */
+  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<ExtensibleManifestItemFile>
+)
+
+/**
+ * A file built from the item.
+ */
+data class ExtensibleManifestItemFile(
+  /**
+   * The name of the file.
+   */
+  val name: String,
+  /**
+   * A type of file.
+   */
+  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/SmartDownloader.kt

@@ -1,9 +1,13 @@
 package gay.pizza.foundation.concrete
 
 import java.net.URI
-import java.nio.file.Files
+import java.net.http.HttpClient
+import java.net.http.HttpRequest
+import java.net.http.HttpResponse.BodyHandlers
 import java.nio.file.Path
 import java.security.MessageDigest
+import kotlin.io.path.exists
+import kotlin.io.path.inputStream
 
 class SmartDownloader(
   private val localFilePath: Path,
@@ -20,23 +24,25 @@ class SmartDownloader(
   }
 
   private fun downloadRemoteFile() {
-    val url = remoteDownloadUrl.toURL()
-    val remoteFileStream = url.openStream()
-    val localFileStream = Files.newOutputStream(localFilePath)
-    remoteFileStream.transferTo(localFileStream)
+    val httpClient = HttpClient.newHttpClient()
+    val request = HttpRequest.newBuilder()
+      .GET()
+      .uri(remoteDownloadUrl)
+      .build()
+    httpClient.send(request, BodyHandlers.ofFile(localFilePath))
     val hashResult = checkLocalFileHash()
     if (hashResult != HashResult.ValidHash) {
-      throw RuntimeException("Download of $remoteDownloadUrl did not result in valid hash.")
+      throw RuntimeException("Download of $remoteDownloadUrl did not result in a valid hash.")
     }
   }
 
   private fun checkLocalFileHash(): HashResult {
-    if (!Files.exists(localFilePath)) {
+    if (!localFilePath.exists()) {
       return HashResult.DoesNotExist
     }
 
     val digest = MessageDigest.getInstance("SHA-256")
-    val localFileStream = Files.newInputStream(localFilePath)
+    val localFileStream = localFilePath.inputStream()
     val buffer = ByteArray(16 * 1024)
 
     while (true) {

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

@@ -4,15 +4,22 @@ import org.gradle.api.DefaultTask
 import org.gradle.api.tasks.TaskAction
 import java.nio.file.Files
 import java.nio.file.Path
+import kotlin.io.path.name
+import kotlin.io.path.relativeTo
 
 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 paths = project.shadowJarOutputs!!.allFilesRelativeToPath(rootPath)
+    val rootExtension = project.concreteRootExtension
+    val rootPath = if (rootExtension.expansiveItemInclusion.orNull == true) {
+      project.rootProject.rootDir
+    } else {
+      project.rootDir
+    }
+    val legacyUpdateManifest = project.findPluginProjects().mapNotNull { project ->
+      val paths = project.shadowJarOutputs!!.files.allFilesRelativeToPath(rootPath.toPath())
+
       if (paths.isNotEmpty()) {
         project.name to mapOf(
           "version" to project.version,
@@ -21,7 +28,40 @@ 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.findItemProjects().map { project ->
+      val concreteItemExtension = project.concreteItemExtension!!
+      val pathInclusion = concreteItemExtension.fileInclusion.orNull ?: {
+        project.shadowJarOutputs!!.files.associateWith { "plugin-jar" }
+      }
+      val paths = pathInclusion()
+
+      val dependencies = concreteItemExtension.dependencies.map { it.name }
+
+      ExtensibleManifestItem(
+        name = project.name,
+        type = concreteItemExtension.type.orNull ?: "bukkit-plugin",
+        version = concreteItemExtension.version.orNull ?: project.version.toString(),
+        dependencies = dependencies,
+        files = paths.map { (path, type) ->
+          ExtensibleManifestItemFile(
+            name = path.name,
+            type = type,
+            path = path.toPath().relativeTo(rootPath.toPath()).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

@@ -4,6 +4,7 @@ import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.api.Project
 import org.gradle.api.tasks.TaskContainer
 import org.gradle.api.tasks.TaskOutputs
+import java.io.File
 import java.nio.file.FileSystems
 import java.nio.file.Path
 
@@ -12,11 +13,30 @@ import java.nio.file.Path
  */
 internal fun Project.isPluginProject() = plugins.hasPlugin(ConcretePluginPlugin::class.java)
 
+/**
+ * Checks if the project has the [ConcreteBasePlugin] applied and is opting into item behavior.
+ */
+internal fun Project.isConcreteItem() =
+  isPluginProject() || concreteItemExtension?.type?.orNull != null
+
 /**
  * Finds all projects in the project's hierarchy that are plugins.
  */
 internal fun Project.findPluginProjects() = allprojects.filter { project -> project.isPluginProject() }
 
+/**
+ * Finds all projects in the project's hierarchy that are items.
+ */
+internal fun Project.findItemProjects(): List<Project> {
+  val optInExpansion = concreteRootExtension.expansiveItemInclusion.orNull ?: false
+  val searchScope = if (optInExpansion) {
+    project.rootProject.allprojects
+  } else {
+    allprojects
+  }
+  return searchScope.filter { project -> project.isConcreteItem() }
+}
+
 internal fun TaskContainer.addTaskDependency(dependent: String, dependency: String) {
   getByName(dependent).dependsOn(getByName(dependency))
 }
@@ -30,20 +50,23 @@ 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.concreteItemExtension: ConcreteItemExtension?
+  get() = extensions.findByType(ConcreteItemExtension::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?" }
   )
@@ -65,6 +88,6 @@ internal fun <T> Project.findTargetParent(valid: Project.() -> Boolean, extract:
   throw RuntimeException(error())
 }
 
-internal fun TaskOutputs.allFilesRelativeToPath(root: Path): List<Path> = files.map { root.relativize(it.toPath()) }
+internal fun Iterable<File>.allFilesRelativeToPath(root: Path): List<Path> = map { root.relativize(it.toPath()) }
 
 internal fun Path.toUnixString() = toString().replace(FileSystems.getDefault().separator, "/")

tools/build-samples.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+set -e
+cd "$(dirname "${0}")/.."
+for SAMPLE_PATH in samples/*
+do
+  pushd "${SAMPLE_PATH}" > /dev/null
+  ./gradlew -q build
+  popd > /dev/null
+done