build: fix rust temp file conflicts during parallel build

1 files changed, 14 insertions, 0 deletions

diff --git a/build_extra/rust/get_version_hash.py b/build_extra/rust/get_version_hash.py
new file mode 100644
index 000000000..7d37cbf9b
--- /dev/null
+++ b/build_extra/rust/get_version_hash.py
@@ -0,0 +1,14 @@
+# Copyright 2018 the Deno authors. All rights reserved. MIT license.
+
+# This script computes the sha256sum of the first command line argument, and
+# writes a few hex digits of it to stdout. It is used by rust.gni to derive a
+# unique string (without dots/special characters) from a crate version number.
+
+from hashlib import sha256
+import sys
+
+if len(sys.argv) != 2:
+    raise Exception('Expected exactly one argument.')
+
+hash = sha256(sys.argv[1]).hexdigest()
+sys.stdout.write(hash[0:8])