Prepare dokka (#1238)

* Prepare dokka

This updates to Dokka 1.4.10 and prepares for a future with Kotlin rewrite and mkdocs

* Spotless

.gitignore

@@ -25,3 +25,6 @@ obj
 .DS_Store
 
 .gradle
+
+# Temporary until generating a docsite
+docs/

build.gradle.kts

@@ -16,6 +16,8 @@
 
 import com.diffplug.gradle.spotless.JavaExtension
 import org.gradle.jvm.tasks.Jar
+import org.jetbrains.dokka.gradle.DokkaTask
+import java.net.URL
 
 buildscript {
   dependencies {
@@ -24,9 +26,9 @@ buildscript {
 }
 
 plugins {
-  id("com.vanniktech.maven.publish") version "0.12.0" apply false
-  id("org.jetbrains.dokka") version "0.10.1" apply false
-  id("com.diffplug.spotless") version "5.5.0"
+  id("com.vanniktech.maven.publish") version "0.13.0" apply false
+  id("org.jetbrains.dokka") version "1.4.10" apply false
+  id("com.diffplug.spotless") version "5.6.0"
 }
 
 spotless {
@@ -102,17 +104,11 @@ spotless {
 subprojects {
   repositories {
     mavenCentral()
-    @Suppress("UnstableApiUsage")
-    exclusiveContent {
-      forRepository {
-        maven {
-          name = "JCenter"
-          setUrl("https://jcenter.bintray.com/")
-        }
-      }
-      filter {
-        includeModule("org.jetbrains.dokka", "dokka-fatjar")
-      }
+    jcenter().mavenContent {
+      // Required for Dokka
+      includeModule("org.jetbrains.kotlinx", "kotlinx-html-jvm")
+      includeGroup("org.jetbrains.dokka")
+      includeModule("org.jetbrains", "markdown")
     }
   }
 
@@ -137,5 +133,18 @@ subprojects {
         }
       }
     }
+
+    if (name != "codegen" && pluginManager.hasPlugin("org.jetbrains.kotlin.jvm")) {
+      apply(plugin = "org.jetbrains.dokka")
+      tasks.named<DokkaTask>("dokkaHtml") {
+        outputDirectory.set(rootDir.resolve("docs/1.x"))
+        dokkaSourceSets.configureEach {
+          skipDeprecated.set(true)
+          externalDocumentationLink {
+            url.set(URL("https://square.github.io/okio/2.x/okio/"))
+          }
+        }
+      }
+    }
   }
 }

examples/src/main/java/com/squareup/moshi/recipes/IncludeNullsForAnnotatedTypes.java

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ *    https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,

examples/src/main/java/com/squareup/moshi/recipes/IncludeNullsForOneType.java

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ *    https://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,