[bug#63044] [PATCH v3] gnu: python-setuptools: Disable date checking in bdist_egg.py

[Brian Cully]

This fixes errors when packing Python eggs, where ZipFile fails due to Guix
setting file timestamps to 0 epoch seconds, where ZipFile wants all files to
date from at least 1980.

* gnu/packages/python-build.scm (python-setuptools)
[disable-zipfile-date-check]:  new phase
---
 gnu/packages/python-build.scm | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/python-build.scm b/gnu/packages/python-build.scm
index 70719c44d4..d9f6f5beff 100644
--- a/gnu/packages/python-build.scm
+++ b/gnu/packages/python-build.scm
@@ -299,7 +299,21 @@ (define-public python-setuptools
     (build-system python-build-system)
     ;; FIXME: Tests require pytest, which itself relies on setuptools.
     ;; One could bootstrap with an internal untested setuptools.
-    (arguments (list #:tests? #f))
+    (arguments
+     (list
+      #:tests? #f
+      #:phases
+      #~(modify-phases %standard-phases
+          ;; Disable the check which requires files to be dated from at least
+          ;; 1980.
+          ;;
+          ;; This phase is also in the base python package, as it includes its
+          ;; own setuptools.
+          (add-after 'unpack 'disable-zipfile-date-check
+            (lambda _
+              (substitute* "setuptools/command/bdist_egg.py"
+                (("zipfile.ZipFile\\(zip_filename, mode, 
compression=compression\\)")
+                 "zipfile.ZipFile(zip_filename, mode, compression=compression, 
strict_timestamps=False)")))))))
     (home-page "https://pypi.org/project/setuptools/";)
     (synopsis "Library designed to facilitate packaging Python projects")
     (description "Setuptools is a fully-featured, stable library designed to
-- 
2.39.2