Fix ub-multidex gradle build, add docs

Bug: 63945424
Test: ./gradlew dist
Change-Id: Ib2e7ab6a02aa8944a1ebd4ac20636c90c95543ab

1 files changed, 13 insertions, 7 deletions

diff --git a/library/build.gradle b/library/build.gradle
index 83cbd27..fe707f0 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -36,7 +36,7 @@ task makeVersionFile(type:Exec) {
 }
 
 android {
-    compileSdkVersion 4
+    compileSdkVersion gradle.currentSdk
 
     defaultConfig {
         minSdkVersion 4
@@ -55,15 +55,21 @@ android {
             manifest.srcFile 'AndroidManifest.xml'
         }
     }
+}
+
+android.libraryVariants.all { variant ->
+    variant.getJavaCompiler().dependsOn(makeVersionFile)
 
-    lintOptions {
-        // TODO: fix errors and reenable.
-        abortOnError false
+    if (!name.equals(com.android.builder.core.BuilderConstants.RELEASE)) {
+        return // Skip non-release
     }
-}
 
-android.libraryVariants.all {
-    v -> v.getJavaCompiler().dependsOn(makeVersionFile)
+
+    def sourceJar = project.tasks.create(name: "sourceJarRelease", type: Jar) {
+        classifier = 'sources'
+        from android.sourceSets.main.java.srcDirs
+    }
+    artifacts.add("archives", sourceJar)
 }
 
 uploadArchives {