fix(release): support environment validation in containers

scripts/validate_release_env.py

@@ -108,7 +108,12 @@ def validate(values: dict[str, str], strict_external: bool) -> list[str]:
 
 def main() -> int:
     parser = argparse.ArgumentParser(description=__doc__)
-    parser.add_argument("env_file", type=Path)
+    parser.add_argument("env_file", type=Path, nargs="?", help="Env file to validate. Omit with --from-environ.")
+    parser.add_argument(
+        "--from-environ",
+        action="store_true",
+        help="Validate the current process environment instead of reading an env file.",
+    )
     parser.add_argument(
         "--strict-external",
         action="store_true",
@@ -116,14 +121,24 @@ def main() -> int:
     )
     args = parser.parse_args()
 
-    values = parse_env_file(args.env_file)
+    if args.from_environ:
+        import os
+
+        values = dict(os.environ)
+        source = "process environment"
+    else:
+        if args.env_file is None:
+            parser.error("env_file is required unless --from-environ is set")
+        values = parse_env_file(args.env_file)
+        source = str(args.env_file)
+
     errors = validate(values, args.strict_external)
     if errors:
         for error in errors:
             print(f"ERROR: {error}")
         return 1
 
-    print(f"OK: {args.env_file} passed release env validation")
+    print(f"OK: {source} passed release env validation")
     return 0