add source and javadoc for mavenlocal

Author: wenxi-zeng

gradle/mvn-publish.gradle

@@ -12,6 +12,10 @@ publishing {
             version getVersionName()
 
             artifact("$buildDir/outputs/aar/${project.getName()}-release.aar")
+            if (gradle.startParameter.taskNames.any { it.contains('publishToMavenLocal') }) {
+                artifact sourcesJar
+                artifact javadocJar
+            }
 
             // Self-explanatory metadata for the most part
             pom {

substrata-kotlin/build.gradle

@@ -51,6 +51,31 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
     implementation "org.jetbrains.kotlin:kotlin-reflect:1.6.21"
 }
+task sourcesJar(type: Jar) {
+    archiveClassifier.set('sources')
+    from android.sourceSets.main.java.srcDirs
+}
+
+task javadoc(type: Javadoc) {
+    configurations.implementation.setCanBeResolved(true)
+
+    failOnError false
+    source = android.sourceSets.main.java.sourceFiles
+    classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
+    classpath += configurations.implementation
+}
+
+// build a jar with javadoc
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    archiveClassifier.set('javadoc')
+    from javadoc.destinationDir
+}
+
+// Attach Javadocs and Sources jar
+artifacts {
+    archives sourcesJar
+    archives javadocJar
+}
 
 apply from: rootProject.file('gradle/mvn-publish.gradle')
 tasks.named("signReleasePublication") {