Fix caching when the effective cache key would contain spaces

This can happen when the OS name is something like "Ubuntu 24.04.4 LTS", for example. Also, to be
safer, we replace all other whitespace with dashes too.

Author: gdubicki

Changes.md

@@ -1,6 +1,8 @@
-## 0.0.8
+## 1.0.7
 
 - Fixed a bug in calculating the `cross` binary's hash.
+- Fixed cache key handling to deal with spaces in cache key elements, for example in the OS version.
+  Reported by @gdubicki (Greg Dubicki). GH #50. Fixes #1.
 
 ## 1.0.6 2026-03-15
 

parse-and-set-rust-cache-parameters.py

@@ -4,6 +4,7 @@
 import os
 import sys
 import hashlib
+import re
 
 
 def main():
@@ -32,6 +33,8 @@ def main():
             get_file_hash(build_command)
         )
 
+    parameters["key"] = sanitize_key(parameters["key"])
+
     file = os.environ["GITHUB_OUTPUT"]
     with open(file, "w") as f:
         for key, value in parameters.items():
@@ -46,4 +49,9 @@ def get_file_hash(build_command):
         return file_hash.hexdigest()
 
 
+def sanitize_key(key):
+    # cache key cannot contain any whitespace
+    return re.sub(r"\s+", "-", key)
+
+
 main()