If vendor RocksDb files have changed the trigger a clean rebuild. (#49)

scripts/build_static_deps.sh

@@ -23,6 +23,14 @@ BUILD_DEST="${REPO_DIR}/build/lib"
 
 git submodule update --init
 
+if ${MAKE} -C "${ROCKSDB_LIB_DIR}" --dry-run static_lib | grep -q 'Nothing to be done'; then
+  echo "RocksDb static libraries already built. Skipping build."
+  exit 0
+else
+  ${REPO_DIR}/scripts/clean_build_artifacts.sh
+  echo "Building RocksDb static libraries."
+fi
+
 export DISABLE_WARNING_AS_ERROR=1
 
 export ROCKSDB_DISABLE_SNAPPY=1

scripts/clean_build_artifacts.sh

@@ -13,7 +13,9 @@ set -e
 
 cd "$(dirname "${BASH_SOURCE[0]}")"/..
 
-rm -rf build
-make -C vendor/rocksdb clean
+echo "Cleaning up RocksDb build artifacts."
 
-git submodule foreach --recursive git clean -fdx
+rm -rf build
+make -C vendor/rocksdb clean --no-print-directory > /dev/null
+
+git submodule foreach --recursive git clean -fdx > /dev/null