cheetah: fails to build against python 3.15

Maximiliano Curia <[email protected]> Wed, 5 Aug 2026 17:20:54 +0200

Newsgroups	gmane.linux.debian.devel.python
Message-ID	<[email protected]>

Package: src:cheetah
Version: 3.4.0-1
User: [email protected]
Usertags: python3.15

Hi!

While rebuilding packages with python 3.15 we found that cheetah fails
to build because load_module was removed.

I'm attaching a debdiff with the upstream patch that replaces the call
to load_module. Please consider fixing this before python 3.15 is in
unstable.

I've also prepared a merge request in salsa,
https://salsa.debian.org/jcfp/cheetah/-/merge_requests/1 which might be
easier to work with depending on your workflow.

Happy hacking,
-- 
"I decry the current tendency to seek patents on algorithms. There are better 
ways to earn a living than to prevent other people from making use of one's 
contributions to computer science."
-- Donald Knuth
Saludos /\/\ /\ >< `/

cheetah_3.4.0-1.1.debdiff (text/plain, 2.2 KB)

diff -Nru cheetah-3.4.0/debian/changelog cheetah-3.4.0/debian/changelog
--- cheetah-3.4.0/debian/changelog	2024-12-03 13:00:33.000000000 +0100
+++ cheetah-3.4.0/debian/changelog	2026-08-05 15:29:42.000000000 +0200
@@ -1,3 +1,11 @@
+cheetah (3.4.0-1.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload
+  * Add upstream patch to fix build with Python 3.15:
+    - Stop using load_module() in compat (f935b58)
+
+ -- Maximiliano Curia <[email protected]>  Wed, 05 Aug 2026 15:29:42 +0200
+
 cheetah (3.4.0-1) unstable; urgency=medium
 
   * Watch: revert back to tracking tagged releases.
diff -Nru cheetah-3.4.0/debian/patches/python3.15-load-module.patch cheetah-3.4.0/debian/patches/python3.15-load-module.patch
--- cheetah-3.4.0/debian/patches/python3.15-load-module.patch	1970-01-01 01:00:00.000000000 +0100
+++ cheetah-3.4.0/debian/patches/python3.15-load-module.patch	2026-08-05 15:29:42.000000000 +0200
@@ -0,0 +1,28 @@
+commit f935b58cdf47570b288e59a8a19e157d5909f7ac
+Author: Steve Kowalik <[email protected]>
+Date:   Fri Jul 17 15:07:49 2026 +1000
+
+    Stop using load_module() in compat
+    
+    load_module() has been deprecated effectively since it was added,
+    replaced by exec_module in Python 3.5, switch to using that, since
+    load_module() was removed in Python 3.15.
+    
+    Note this effectively removes support for Python 3.4, but I can reenable
+    that if you prefer.
+
+diff --git a/Cheetah/compat.py b/Cheetah/compat.py
+index 78cfcdd..7810506 100644
+--- a/Cheetah/compat.py
++++ b/Cheetah/compat.py
+@@ -53,7 +53,9 @@ else:
+ 
+     def load_module_from_file(base_name, module_name, filename):
+         specs = importlib.util.spec_from_file_location(module_name, filename)
+-        return specs.loader.load_module()
++        module = importlib.util.module_from_spec(specs)
++        specs.loader.exec_module(module)
++        return module
+ 
+     new_module = types.ModuleType
+ 
diff -Nru cheetah-3.4.0/debian/patches/series cheetah-3.4.0/debian/patches/series
--- cheetah-3.4.0/debian/patches/series	2024-03-19 10:12:04.000000000 +0100
+++ cheetah-3.4.0/debian/patches/series	2026-08-05 15:29:42.000000000 +0200
@@ -1 +1,2 @@
 python3-tests.patch
+python3.15-load-module.patch

signature.asc (application/pgp-signature, 833 B)