[llvm] 6466c9a - [lit] Passthrough CLANG_MODULE_CACHE_PATH env var

[Alex Brachet via llvm-commits]

Author: Alex Brachet
Date: 2022-06-11T21:04:02Z
New Revision: 6466c9abf3674bade1f6ee859f24ebc7aaf9cd88

URL: https://github.com/llvm/llvm-project/commit/6466c9abf3674bade1f6ee859f24ebc7aaf9cd88
DIFF: https://github.com/llvm/llvm-project/commit/6466c9abf3674bade1f6ee859f24ebc7aaf9cd88.diff

LOG: [lit] Passthrough CLANG_MODULE_CACHE_PATH env var

This environment variable can be set to control module
caching. It disables caching by setting the variable
empty. As such, it needs to be handled differently
from other environment variables here which are
assumed to not be empty.

Added: 
    

Modified: 
    llvm/utils/lit/lit/TestingConfig.py

Removed: 
    


################################################################################
diff  --git a/llvm/utils/lit/lit/TestingConfig.py b/llvm/utils/lit/lit/TestingConfig.py
index bdb87c376127c..a4c9251c96386 100644
--- a/llvm/utils/lit/lit/TestingConfig.py
+++ b/llvm/utils/lit/lit/TestingConfig.py
@@ -77,6 +77,14 @@ def fromdefaults(litConfig):
             if val:
                 environment[var] = val
 
+        pass_vars_emptyable = [
+            'CLANG_MODULE_CACHE_PATH',
+        ]
+
+        for var in pass_vars_emptyable:
+            if var in os.environ:
+                environment[var] = os.environ[var]
+
         # Set the default available features based on the LitConfig.
         available_features = []
         if litConfig.useValgrind: