Add shellcheck support (#8574)

python/build-wheel-windows.sh

@@ -8,6 +8,10 @@ WORKSPACE_DIR="${ROOT_DIR}/.."
 PY_VERSIONS=($(python -s -c "import runpy, sys; runpy.run_path(sys.argv.pop(), run_name='__api__')" python_versions "${ROOT_DIR}"/setup.py | tr -d "\r"))
 PY_SCRIPT_SUBDIR=Scripts  # 'bin' for UNIX, 'Scripts' for Windows
 
+bazel_preclean() {
+  "${WORKSPACE_DIR}"/ci/travis/bazel.py preclean "mnemonic(\"Genrule\", deps(//:*))"
+}
+
 get_python_version() {
   python -s -c "import sys; sys.stdout.write('%s.%s' % sys.version_info[:2])"
 }
@@ -56,7 +60,7 @@ build_wheel_windows() {
   local local_dir="python/dist"
   for pyversion in "${pyversions[@]}"; do
     if [ -z "${pyversion}" ]; then continue; fi
-    "${WORKSPACE_DIR}"/ci/travis/bazel-preclean.sh
+    bazel_preclean
     git clean -q -f -f -x -d -e "${local_dir}" -e python/ray/dashboard/client
     git checkout -q -f -- .
 
@@ -82,7 +86,7 @@ build_wheel_windows() {
     )
   done
 
-  "${WORKSPACE_DIR}"/ci/travis/bazel-preclean.sh
+  bazel_preclean
   if [ 0 -eq "${ray_uninstall_status}" ]; then  # If Ray was previously installed, restore it
     install_ray
   fi