From c2b72906ce6fa10895d334e3739d803cda1ac1e8 Mon Sep 17 00:00:00 2001
From: Russell Keith-Magee <russell@keith-magee.com>
Date: Thu, 30 May 2024 14:01:17 +0800
Subject: [PATCH 1/2] Add a UUID cookiecutter extension.

---
 src/briefcase/integrations/cookiecutter.py    | 16 ++++++++++++++++
 .../cookiecutter/test_UUIDExtension.py        | 19 +++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 tests/integrations/cookiecutter/test_UUIDExtension.py

diff --git a/src/briefcase/integrations/cookiecutter.py b/src/briefcase/integrations/cookiecutter.py
index 3c66ffd06..8367b94c7 100644
--- a/src/briefcase/integrations/cookiecutter.py
+++ b/src/briefcase/integrations/cookiecutter.py
@@ -1,5 +1,7 @@
 """Jinja2 extensions."""
 
+import uuid
+
 from jinja2.ext import Extension
 
 
@@ -116,3 +118,17 @@ def bool_attr(obj):
             return "true" if obj else "false"
 
         environment.filters["bool_attr"] = bool_attr
+
+
+class UUIDExtension(Extension):
+    """Extensions for generating UUIDs."""
+
+    def __init__(self, environment):
+        """Initialize the extension with the given environment."""
+        super().__init__(environment)
+
+        def dns_uuid5(obj):
+            """A DNS-based UUID5 object generated from the provided content."""
+            return str(uuid.uuid5(uuid.NAMESPACE_DNS, obj))
+
+        environment.filters["dns_uuid5"] = dns_uuid5
diff --git a/tests/integrations/cookiecutter/test_UUIDExtension.py b/tests/integrations/cookiecutter/test_UUIDExtension.py
new file mode 100644
index 000000000..6be2ebd28
--- /dev/null
+++ b/tests/integrations/cookiecutter/test_UUIDExtension.py
@@ -0,0 +1,19 @@
+from unittest.mock import MagicMock
+
+import pytest
+
+from briefcase.integrations.cookiecutter import UUIDExtension
+
+
+@pytest.mark.parametrize(
+    "value, expected",
+    [
+        ("example.com", "cfbff0d1-9375-5685-968c-48ce8b15ae17"),
+        ("foobar.example.com", "941bbcd9-03e1-568a-a728-8434055bc338"),
+    ],
+)
+def test_dns_uuid5_value(value, expected):
+    env = MagicMock()
+    env.filters = {}
+    UUIDExtension(env)
+    assert env.filters["dns_uuid5"](value) == expected

From ba536544727150519893cf1e6c9e7b1c72b0c200 Mon Sep 17 00:00:00 2001
From: Russell Keith-Magee <russell@keith-magee.com>
Date: Thu, 30 May 2024 14:03:24 +0800
Subject: [PATCH 2/2] Added a changenote.

---
 changes/1850.misc.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changes/1850.misc.rst

diff --git a/changes/1850.misc.rst b/changes/1850.misc.rst
new file mode 100644
index 000000000..a96b93dea
--- /dev/null
+++ b/changes/1850.misc.rst
@@ -0,0 +1 @@
+A UUID cookiecutter extension was added to support Windows MSI templating.