Gradle Plugin for creating Processing Libraries

gradle/plugins/library/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    `java-gradle-plugin`
+    kotlin("jvm") version "2.2.20"
+}
+
+gradlePlugin {
+    plugins {
+        create("processing.library") {
+            id = "org.processing.library"
+            implementationClass = "ProcessingLibraryPlugin"
+        }
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+kotlin {
+    jvmToolchain(17)
+}

gradle/plugins/library/src/main/kotlin/BundleLibraryFilesTask.kt

@@ -0,0 +1,77 @@
+import org.gradle.api.DefaultTask
+import org.gradle.api.GradleException
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.OutputDirectory
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.bundling.Jar
+import org.gradle.api.tasks.javadoc.Javadoc
+
+abstract class BundleLibraryFilesTask : DefaultTask() {
+    @Input
+    var configuration: ProcessingLibraryConfiguration? = null
+
+    @OutputDirectory
+    val outputDir = project.objects.directoryProperty()
+
+    init {
+        outputDir.convention(project.layout.buildDirectory.dir("library"))
+    }
+
+    @TaskAction
+    fun bundle() {
+        val configuration = configuration
+            ?: throw GradleException("Processing library configuration must be provided.")
+        val libraryName = configuration.name ?: project.name
+
+        val buildDir = project.layout.buildDirectory.dir("library/$libraryName").get().asFile
+        buildDir.mkdirs()
+
+        val libDir = buildDir.resolve("library")
+        libDir.mkdirs()
+
+        // Copy the jar file
+        val jarFile = project.tasks.named("jar", Jar::class.java).get().archiveFile.get().asFile
+        jarFile.copyTo(libDir.resolve("$libraryName.jar"), overwrite = true)
+
+        // Copy all runtime dependencies
+        val runtimeClasspath = project.configurations.getByName("runtimeClasspath")
+        runtimeClasspath.resolvedConfiguration.resolvedArtifacts.forEach { artifact ->
+            val depFile = artifact.file
+            depFile.copyTo(libDir.resolve(depFile.name), overwrite = true)
+        }
+
+        // Copy Examples folder
+        val examplesDir = project.projectDir.resolve("examples")
+        if (!examplesDir.exists() || !examplesDir.isDirectory) {
+            throw GradleException("Examples folder not found in project directory.")
+        }
+        examplesDir.copyRecursively(buildDir.resolve("examples"), overwrite = true)
+
+        // Copy javadoc to reference folder
+        val docsDir = project.tasks.named("javadoc", Javadoc::class.java).get().destinationDir
+        docsDir?.copyRecursively(buildDir.resolve("reference"), overwrite = true)
+
+        // Create library.properties file
+        val propertiesFile = buildDir.resolve("library.properties")
+        propertiesFile.bufferedWriter().use { writer ->
+            val properties = mapOf(
+                "name" to libraryName,
+                "version" to (configuration.version ?: "1.0.0"),
+                "prettyVersion" to (configuration.prettyVersion ?: configuration.version ?: "1.0.0"),
+                "authors" to (configuration.authors.entries.joinToString(", ") { "[${it.key}](${it.value})" }),
+                "url" to configuration.url,
+                "category" to configuration.categories.joinToString(", "),
+                "sentence" to configuration.sentence,
+                "paragraph" to configuration.paragraph,
+                "minRevision" to configuration.minRevision,
+                "maxRevision" to configuration.maxRevision
+            )
+            properties
+                .filter { it.value != null && it.value.toString().isNotEmpty() }
+                .forEach { (key, value) ->
+                    writer.write("$key=$value\n")
+                }
+        }
+        propertiesFile.copyTo(buildDir.resolve("../$libraryName.txt"), overwrite = true)
+    }
+}

gradle/plugins/library/src/main/kotlin/ProcessingLibraryExtension.kt

@@ -0,0 +1,64 @@
+import org.gradle.api.Action
+import org.gradle.api.model.ObjectFactory
+import java.io.Serializable
+import javax.inject.Inject
+
+open class ProcessingLibraryExtension @Inject constructor(objects: ObjectFactory) {
+    var version: String? = null
+    val library = objects.newInstance(ProcessingLibraryConfiguration::class.java)
+    fun library(action: Action<ProcessingLibraryConfiguration>) {
+        action.execute(library)
+    }
+}
+
+open class ProcessingLibraryConfiguration @Inject constructor() : Serializable {
+    /**
+     * Name of the library. If not set, the project name will be used.
+     */
+    var name: String? = null
+
+    /**
+     * Version number of the library.
+     */
+    var version: Int? = null
+
+    /**
+     * Pretty version string of the library.
+     */
+    var prettyVersion: String? = null
+
+    /**
+     * Map of author URLs to author names.
+     */
+    var authors: Map<String, String> = emptyMap()
+
+    /**
+     * URL of the library where more information can be found.
+     */
+    var url: String? = null
+
+    /**
+     * List of categories the library belongs to.
+     */
+    var categories: List<String> = emptyList()
+
+    /**
+     * A one-line sentence describing the library.
+     */
+    var sentence: String? = null
+
+    /**
+     * A longer paragraph describing the library.
+     */
+    var paragraph: String? = null
+
+    /**
+     * Minimum Processing revision required.
+     */
+    var minRevision: Int? = null
+
+    /**
+     * Maximum Processing revision supported.
+     */
+    var maxRevision: Int? = null
+}

gradle/plugins/library/src/main/kotlin/ProcessingLibraryPlugin.kt

@@ -0,0 +1,125 @@
+import org.gradle.api.GradleException
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.plugins.JavaPlugin
+import org.gradle.api.plugins.JavaPluginExtension
+import org.gradle.api.tasks.bundling.Jar
+import org.gradle.api.tasks.bundling.Zip
+import org.gradle.api.tasks.javadoc.Javadoc
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+import java.util.prefs.Preferences
+
+class ProcessingLibraryPlugin : Plugin<Project> {
+
+    override fun apply(target: Project) {
+        val extension = target.extensions.create("processing", ProcessingLibraryExtension::class.java)
+        target.plugins.apply(JavaPlugin::class.java)
+
+        target.repositories.mavenCentral()
+        target.repositories.maven { it.setUrl("https://jogamp.org/deployment/maven/") }
+
+        // Grab processing core if available, otherwise use the published version
+        val hasCore = try {
+            val core = target.project(":core")
+            target.dependencies.add("compileOnly", core)
+            true
+        } catch (_: Exception) {
+            false
+        }
+
+        target.afterEvaluate {
+            if (!hasCore) {
+                if (extension.version == null) {
+                    throw GradleException("Processing library version must be specified, please set processing.version in your build.gradle.kts")
+                }
+                val processingVersion = extension.version
+                target.dependencies.add("compileOnly", "org.processing:core:$processingVersion")
+            }
+        }
+        target.extensions.configure(JavaPluginExtension::class.java) { extension ->
+            extension.toolchain.languageVersion.set(JavaLanguageVersion.of(17))
+        }
+
+        target.plugins.withType(JavaPlugin::class.java) {
+            val jarTask = target.tasks.named("jar", Jar::class.java)
+            val javaDocTask = target.tasks.named("javadoc", Javadoc::class.java)
+
+            val bundleTask = target.tasks.register("bundleLibrary", BundleLibraryFilesTask::class.java) { task ->
+                task.configuration = extension.library
+                task.group = "processing"
+                task.description = "Creates the Processing library folder with jar, library.properties, and examples."
+                task.dependsOn(jarTask, javaDocTask)
+            }
+
+            val zipTask = target.tasks.register("zipLibrary", Zip::class.java) { task ->
+                task.apply {
+                    val libraryName = extension.library.name ?: target.name
+                    val sourceDir = bundleTask.get().outputDir.get().asFile
+
+                    group = "processing"
+                    description = "Creates a zip & pdex archive of the Processing library folder."
+                    dependsOn(bundleTask)
+                    include("${libraryName}/**")
+
+                    archiveFileName.set("$libraryName.zip")
+                    from(sourceDir)
+                    destinationDirectory.set(sourceDir)
+                    doLast {
+                        val zip = task.outputs.files.files.first()
+                        zip.copyTo(sourceDir.resolve("$libraryName.pdex"), overwrite = true)
+                    }
+                }
+            }
+
+            target.tasks.register("installLibrary") { task ->
+                task.apply {
+                    group = "processing"
+                    dependsOn(zipTask)
+                    doLast {
+                        val preferences = Preferences.userRoot().node("org/processing/app")
+
+                        val semverRe = Regex("""^(\d+)(?:\.(\d+))?(?:\.(\d+))?(?:-([0-9A-Za-z.-]+))?""")
+                        fun semverKey(v: String): Triple<Long, Boolean, String> {
+                            val m = semverRe.find(v)
+                            val maj = m?.groupValues?.getOrNull(1)?.toLongOrNull() ?: 0L
+                            val min = m?.groupValues?.getOrNull(2)?.toLongOrNull() ?: 0L
+                            val pat = m?.groupValues?.getOrNull(3)?.toLongOrNull() ?: 0L
+                            val pre = m?.groupValues?.getOrNull(4)
+                            val packed = (maj shl 40) or (min shl 20) or pat
+                            return Triple(packed, pre == null, pre ?: "")
+                        }
+
+                        val installLocations = preferences.get("installLocations", "")
+                            .split(",")
+                            .filter { it.isNotEmpty() }
+                            .mapNotNull {
+                                val parts = it.split("^")
+                                if (parts.size < 2) null else parts[1] to parts[0] // version to path
+                            }
+                            .sortedWith(Comparator { a, b ->
+                                val ka = semverKey(a.first)
+                                val kb = semverKey(b.first)
+                                when {
+                                    ka.first != kb.first -> kb.first.compareTo(ka.first)
+                                    ka.second != kb.second -> kb.second.compareTo(ka.second)
+                                    else -> kb.third.compareTo(ka.third)
+                                }
+                            })
+
+                        val installPath = installLocations.firstOrNull()?.second
+                            ?: throw GradleException("Could not find Processing install location in preferences.")
+
+                        val libraryName = extension.library.name ?: target.name
+                        val sourceDir = bundleTask.get().outputDir.get().asFile.resolve("$libraryName.pdex")
+
+                        ProcessBuilder()
+                            .command(installPath, sourceDir.absolutePath)
+                            .inheritIO()
+                            .start()
+                    }
+                }
+            }
+
+        }
+    }
+}

gradle/plugins/settings.gradle.kts

@@ -0,0 +1,5 @@
+plugins {
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
+}
+
+include("library")

java/libraries/dxf/build.gradle.kts

@@ -1,5 +1,23 @@
 plugins{
-    java
+    id("org.processing.library")
+}
+
+processing {
+    library {
+        version = 1
+        prettyVersion = "1.0.0"
+
+        authors = mapOf(
+            "The Processing Foundation" to "https://processing.org"
+        )
+        url = "https://processing.org/"
+        categories = listOf("file", "exporter", "dxf")
+
+        sentence = "DXF export library for Processing"
+        paragraph =
+            "This library allows you to export your Processing drawings as DXF files, which can be opened in CAD applications."
+
+    }
 }
 
 sourceSets {
@@ -9,27 +27,23 @@ sourceSets {
         }
     }
 }
-repositories{
-    mavenCentral()
-    maven("https://jogamp.org/deployment/maven/")
-}
-
 dependencies{
-    compileOnly(project(":core"))
-
     implementation("com.lowagie:itext:2.1.7")
 }
 
-tasks.register<Copy>("createLibrary"){
+/**
+ * @deprecated Legacy task, use 'bundleLibrary' task provided by 'org.processing.library' plugin
+ */
+tasks.register<Copy>("createLibrary") {
     dependsOn("jar")
     into(layout.buildDirectory.dir("library"))
 
-    from(layout.projectDirectory){
-        include ("library.properties")
+    from(layout.projectDirectory) {
+        include("library.properties")
         include("examples/**")
     }
 
-    from(configurations.runtimeClasspath){
+    from(configurations.runtimeClasspath) {
         into("library")
     }
 

settings.gradle.kts

@@ -1,4 +1,9 @@
 rootProject.name = "processing"
+
+pluginManagement {
+    includeBuild("gradle/plugins")
+}
+
 include(
     "core",
     "core:examples",