gh-84683: Check <prefix>/share/zoneinfo for zoneinfo files on Windows (GH-28495)

isuruf · web-flow · commit 3000594e929a · 2025-08-06T23:05:41.000+01:00
diff --git a/Lib/sysconfig/__init__.py b/Lib/sysconfig/__init__.py
@@ -412,7 +412,13 @@ def _init_non_posix(vars):
     vars['EXE'] = '.exe'
     vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
     vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
-    vars['TZPATH'] = ''
+    # No standard path exists on Windows for this, but we'll check
+    # whether someone is imitating a POSIX-like layout
+    check_tzpath = os.path.join(vars['prefix'], 'share', 'zoneinfo')
+    if os.path.exists(check_tzpath):
+        vars['TZPATH'] = check_tzpath
+    else:
+        vars['TZPATH'] = ''
 
 #
 # public APIs
diff --git a/Misc/NEWS.d/next/Library/2021-09-21-17-17-29.gh-issue-84683.wDSRsG.rst b/Misc/NEWS.d/next/Library/2021-09-21-17-17-29.gh-issue-84683.wDSRsG.rst
@@ -0,0 +1 @@
+:mod:`zoneinfo`: Check in ``<prefix>/share/zoneinfo`` for data files on Windows

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+:mod:`zoneinfo`: Check in ``<prefix>/share/zoneinfo`` for data files on Windows