Merge pull request #457 from NVIDIA/catch_missing_bazel

feat(//py): Catch when bazel is not in path and error out when running

Author: narendasan

py/setup.py

@@ -46,6 +46,9 @@ def is_exe(fpath):
 
 BAZEL_EXE = which("bazel")
 
+if BAZEL_EXE is None:
+    sys.exit("Could not find bazel in PATH")
+
 
 def build_libtrtorch_pre_cxx11_abi(develop=True, use_dist_dir=True, cxx11_abi=False):
     cmd = [BAZEL_EXE, "build"]