https://github.com/python/cpython/commit/bcf90de8ba2ea087540a5f632656ef880ee46b5c
commit: bcf90de8ba2ea087540a5f632656ef880ee46b5c
branch: main
author: Miro HronĨok <[email protected]>
committer: savannahostrowski <[email protected]>
date: 2025-12-09T17:33:09Z
summary:

gh-142454: Make the JIT digest more deterministic by sorting the files in 
Tools/jit (#142455)

Co-authored-by: Ken Jin <[email protected]>

files:
A Misc/NEWS.d/next/Build/2025-12-09-13-33-46.gh-issue-142454.cqUxzQ.rst
M Tools/jit/_targets.py

diff --git 
a/Misc/NEWS.d/next/Build/2025-12-09-13-33-46.gh-issue-142454.cqUxzQ.rst 
b/Misc/NEWS.d/next/Build/2025-12-09-13-33-46.gh-issue-142454.cqUxzQ.rst
new file mode 100644
index 00000000000000..4de16866f28851
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2025-12-09-13-33-46.gh-issue-142454.cqUxzQ.rst
@@ -0,0 +1,4 @@
+When calculating the digest of the JIT stencils input, sort the hashed files
+by filenames before adding their content to the hasher. This ensures
+deterministic hash input and hence deterministic hash, independent on
+filesystem order.
diff --git a/Tools/jit/_targets.py b/Tools/jit/_targets.py
index adb8a8d8ecb8a1..f92f3eac13bde5 100644
--- a/Tools/jit/_targets.py
+++ b/Tools/jit/_targets.py
@@ -76,7 +76,7 @@ def _compute_digest(self) -> str:
             # Exclude cache files from digest computation to ensure 
reproducible builds.
             if dirpath.endswith("__pycache__"):
                 continue
-            for filename in filenames:
+            for filename in sorted(filenames):
                 hasher.update(pathlib.Path(dirpath, filename).read_bytes())
         return hasher.hexdigest()
 

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