no-distro.patch

commit 42c1819a91df7d03e46e702c2ab8c248f93689bf (origin/distro-only-if-required)
Author: Adam Dinwoodie <adam@dinwoodie.org>
Date:   Mon Oct 23 21:47:02 2023 +0100

    Only use the distro package if needed
    
    Rather than having the distro package as a requirement for OfflineIMAP
    in general, only specify it as a requirement if it's needed, and only
    import it when it's about to be used.
    
    Signed-off-by: Adam Dinwoodie <adam@dinwoodie.org>

diff --git a/offlineimap/utils/distro_utils.py b/offlineimap/utils/distro_utils.py
index 9183045..ddc8edc 100644
--- a/offlineimap/utils/distro_utils.py
+++ b/offlineimap/utils/distro_utils.py
@@ -6,12 +6,6 @@ Module that supports distribution-specific functions.
 import platform
 import os
 
-# linux_distribution deprecated in Python 3.7
-try:
-    from platform import linux_distribution
-except ImportError:
-    from distro import linux_distribution
-
 # For the former we will just return the value, for an iterable
 # we will walk through the values and will return the first
 # one that corresponds to the existing file.
@@ -50,6 +44,12 @@ def get_os_name():
     os_name = platform.system().lower()
 
     if os_name.startswith('linux'):
+        # linux_distribution deprecated in Python 3.7
+        try:
+            from platform import linux_distribution
+        except ImportError:
+            from distro import linux_distribution
+
         distro_name = linux_distribution()[0]
         if distro_name:
             os_name = os_name + "-%s" % distro_name.split()[0].lower()
diff --git a/requirements.txt b/requirements.txt
index e580f5f..58b66ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 gssapi[kerberos]
 portalocker[cygwin]
 rfc6555
-distro
+distro;platform_system=="Linux" and python_version>"3.7"
 
 imaplib2>=3.5
 urllib3~=1.25.9