Create ROADMAP.md

Initial commit of the Kotlin Rules Roadmap.

ROADMAP.md

@@ -0,0 +1,61 @@
+# Kotlin Bazel Roadmap
+
+This document describes the major release milestones for the Kotlin Bazel Rules.
+There are three major pillars that we are focused on when developing the Kotlin
+rules - **Performance**, **Features**, and **Developer Experience** - and for
+each milestone we list the main items for each pillar. Progress on each item is
+tracked via an issue.
+
+If you have feedback on this roadmap (including feature and reprioritization
+requests) please open an issue or comment on the existing one.
+
+## Kotlin 1.3 (est. mid 2019)
+
+The existing Kotlin rules only support up to version 1.2. The primary goal of
+this release is to bring preliminary 1.3 support to Bazel. We will seek to
+provide a migration path for users of the existing rules, with the intention of
+1.3 eventually becoming the master branch. This includes documenting the
+differences between the rulesets, and providing migration tooling and support.
+
+### Performance
+
+*   Compilation avoidance for non-structural changes to dependencies
+
+### Features
+
+*   Support android_instrumentation_test on Linux and macOS
+*   Support building and testing on Google Cloud Platform Remote Build Execution
+*   Support for ktlint
+*   Simplified package and dependency management
+*   Improve Android interoperability
+
+### Developer Experience
+
+*   Document major differences between the rulesets
+*   Documentation for Kotlin with Bazel compatibility across Windows, macOS,
+    Linux
+*   Stable and reliable CI
+*   Sample projects
+
+## XPlat (est. late 2019)
+
+The goal for the XPlat release is to provide a stable cross-platform (XPlat)
+experience for developers. We intend to provide first class Kotlin/Native
+support for Android and iOS, and collaborate with the community to add
+additional target platforms. We also plan to deliver performance improvements
+for build speed and binary size.
+
+### Performance
+
+*   Implement persistent workers for faster compilation
+*   Reduce output binary sizes
+
+### Features
+
+*   Stable Kotlin/Native support for Android and iOS
+*   Support `bazel coverage` for all test rules
+*   Support for Android Lint
+
+### Developer Experience
+
+*   Documentation and guides for writing a cross platform app