Support cargo check (#1128)

- Based on code from @qti3e and @piscisaureus in #724 and #1125
  respectively.
- TODO The DENO_BUILD_PATH env var must be supplied and must be an
  absolute path, this restriction should be removed in future work.

1 files changed, 5 insertions, 2 deletions

diff --git a/build_extra/rust/run.py b/build_extra/rust/run.py
index 276e799cc..0b1fa3dc9 100644
--- a/build_extra/rust/run.py
+++ b/build_extra/rust/run.py
@@ -5,6 +5,9 @@ import subprocess
 import sys
 import os
 
-os.environ["OUT_DIR"] = os.path.abspath(".")
-assert os.path.isdir(os.environ["OUT_DIR"])
+# TODO This is for src/msg.rs to know where to find msg_generated.rs
+# In the future we should use OUT_DIR here.
+os.environ["DENO_BUILD_PATH"] = os.path.abspath(".")
+assert os.path.isdir(os.environ["DENO_BUILD_PATH"])
+
 sys.exit(subprocess.call(sys.argv[1:], env=os.environ))