[flatpaks/flatpak-runtime] f45: Prefer python3- subpackages over python2-

[Kalev Lember <klember@redhat.com>]

            A new commit has been pushed.

            Repo   : flatpaks/flatpak-runtime
            Branch : f45
            Commit : 3308431a4aabf7f81f4aeb9ed4b056e4aeaecdfa
            Author : Kalev Lember <klember@redhat.com>
            Date   : 2020-03-20T21:51:58+01:00
            Stats  : +5/-0 in 1 file(s)
            URL    : https://src.fedoraproject.org/flatpaks/flatpak-runtime/c/3308431a4aabf7f81f4aeb9ed4b056e4aeaecdfa?branch=f45

            Log:
            Prefer python3- subpackages over python2-

This can happen when both python3-foo and python2-foo versions of the
same package provide same files.

---
diff --git a/tools/util.py b/tools/util.py
index 7604bbf..c1f0379 100644
--- a/tools/util.py
+++ b/tools/util.py
@@ -56,6 +56,11 @@ def package_cmp(p1, p2):
     elif n2.startswith('compat-') and not n1.startswith('compat-'):
         return -1
 
+    if n1.startswith('python2-') and n2.startswith('python3-'):
+        return 1
+    elif n1.startswith('python3-') and n2.startswith('python2-'):
+        return -1
+
     if n1 < n2:
         return -1
     elif n1 > n2: