ADFA-5296: Javadoc mode for kdoc-to-json, JDK API docs as JSON, and a Pebble HTML renderer

Dokka-plugin-kdoc2json/examples/example-java-library/build.gradle.kts

@@ -0,0 +1,58 @@
+import org.jetbrains.dokka.gradle.engine.parameters.VisibilityModifier
+import org.jetbrains.dokka.InternalDokkaApi
+import org.jetbrains.dokka.gradle.engine.plugins.DokkaPluginParametersBaseSpec
+import javax.inject.Inject
+
+// A Java-only sibling of examples/example-data-processor, used by tests/test_javadoc_mode.sh.
+// Javadoc mode mirrors the output of the `javadoc` tool, so it needs Java sources exercising the
+// constructs a javadoc page actually has sections for: generic interfaces and their implementors,
+// an abstract base class, an enum, an annotation type, a checked exception, nested types,
+// compile-time constants, deprecation, and the full set of javadoc block tags.
+plugins {
+    java
+    // Must match the dokka-core/dokka-base version kdoc-to-json was compiled against.
+    id("org.jetbrains.dokka") version "2.2.0-Beta"
+}
+
+repositories {
+    // Lets Gradle find the locally published kdoc-to-json plugin.
+    mavenLocal()
+    mavenCentral()
+}
+
+dependencies {
+    dokkaPlugin("org.appdevforall.dokka:kdoc-to-json:1.0.0-SNAPSHOT")
+}
+
+@OptIn(InternalDokkaApi::class)
+abstract class JsonOutputPluginParameters @Inject constructor(
+    name: String
+) : DokkaPluginParametersBaseSpec(name, "org.appdevforall.dokka.kdoc2json.JsonOutputPlugin") {
+    // As in example-data-processor: point KDOC2JSON_TEST_CONFIG at a JSON file to drive this
+    // project through an arbitrary plugin config without editing this build script.
+    override fun jsonEncode(): String {
+        val overridePath = System.getenv("KDOC2JSON_TEST_CONFIG")
+        if (overridePath != null) {
+            return File(overridePath).readText()
+        }
+        return """{
+            "logLevel": "debug",
+            "javadoc-mode": true,
+            "prettyPrint": true
+        }"""
+    }
+}
+
+dokka {
+    dokkaSourceSets.configureEach {
+        // javadoc documents public *and* protected members by default; Dokka documents only
+        // public. Without this, Javadoc mode would silently omit every protected member that a
+        // real javadoc build would have shown.
+        documentedVisibilities.set(setOf(VisibilityModifier.Public, VisibilityModifier.Protected))
+    }
+
+    pluginsConfiguration {
+        registerBinding(JsonOutputPluginParameters::class, JsonOutputPluginParameters::class)
+        register<JsonOutputPluginParameters>("org.appdevforall.dokka.kdoc2json.JsonOutputPlugin") { }
+    }
+}

Dokka-plugin-kdoc2json/examples/example-java-library/gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.5.1-bin.zip
+networkTimeout=10000
+retries=0
+retryBackOffMs=500
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists