From e95758333783300361a7ea6b5a50f633a17effbc Mon Sep 17 00:00:00 2001
From: linsui <2873532-linsui@users.noreply.gitlab.com>
Date: Sat, 26 Apr 2025 01:50:08 +0800
Subject: [PATCH] common: add calculate_gradle_flavor_combination

---
 fdroidserver/common.py | 15 +++++++++++++++
 tests/test_common.py   |  5 +++++
 2 files changed, 20 insertions(+)

diff --git a/fdroidserver/common.py b/fdroidserver/common.py
index 9acfcf2e..9b395ad6 100644
--- a/fdroidserver/common.py
+++ b/fdroidserver/common.py
@@ -58,6 +58,7 @@ from typing import List
 import git
 import glob
 import io
+import itertools
 import os
 import sys
 import re
@@ -4823,6 +4824,20 @@ def calculate_archive_policy(app, default):
     return archive_policy
 
 
+def calculate_gradle_flavor_combination(flavors):
+    """Calculate all combinations of gradle flavors."""
+    combination_lists = itertools.product(*[[flavor, ''] for flavor in flavors])
+    combinations = [
+        re.sub(
+            r' +\w',
+            lambda pat: pat.group(0)[-1].upper(),
+            ' '.join(combination_list).strip(),
+        )
+        for combination_list in combination_lists
+    ]
+    return combinations
+
+
 FDROIDORG_MIRRORS = [
     {
         'isPrimary': True,
diff --git a/tests/test_common.py b/tests/test_common.py
index 521905aa..c8d10045 100755
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -3040,6 +3040,11 @@ class CommonTest(SetUpTearDownMixin, unittest.TestCase):
         p = fdroidserver.common.FDroidPopen(['printenv', 'SOURCE_DATE_EPOCH'])
         self.assertEqual(int(p.output), int(now.timestamp()))
 
+    def test_calculate_gradle_flavor_combination(self):
+        flavors = ['aa', 'BB', 'δδ']
+        combinations = ['aaBBΔδ', 'aaBB', 'aaΔδ', 'aa', 'BBΔδ', 'BB', 'δδ', '']
+        self.assertEqual(fdroidserver.common.calculate_gradle_flavor_combination(flavors), combinations)
+
 
 APKS_WITH_JAR_SIGNATURES = (
     (