urlchecker: Extract version from deb for rotating url

src/checkers/urlchecker.py

@@ -114,6 +114,14 @@ async def check(self, external_data: ExternalBase):
                     version_string = await utils.extract_appimage_version(
                         tmpfile,
                     )
+            if url.endswith(".deb"):
+                with tempfile.NamedTemporaryFile("w+b") as tmpfile:
+                    new_version = await utils.get_extra_data_info_from_url(
+                        url, session=self.session, dest_io=tmpfile
+                    )
+                    version_string = utils.extract_deb_version(
+                        tmpfile,
+                    )
             else:
                 new_version = await utils.get_extra_data_info_from_url(
                     url, session=self.session

src/lib/utils.py

@@ -18,6 +18,8 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
+import apt_inst
+import apt_pkg
 import datetime as dt
 import zoneinfo
 import json
@@ -449,6 +451,12 @@ async def extract_appimage_version(appimg_io: t.IO):
             return kf.get_string(GLib.KEY_FILE_DESKTOP_GROUP, "X-AppImage-Version")
 
 
+def extract_deb_version(deb_io: t.IO):
+    assert deb_io.name
+    control = apt_inst.DebFile(deb_io.name).control.extractdata("control")
+    return apt_pkg.TagSection(control).get("Version")
+
+
 _GITHUB_URL_PATTERN = re.compile(
     r"""
         ^[email protected]:

tests/com.google.Chrome.yaml

@@ -0,0 +1,9 @@
+app-id: com.google.Chrome
+modules:
+  - name: chrome
+    sources:
+      - type: extra-data
+        filename: chrome.deb
+        url: https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
+        sha256: "0000000000000000000000000000000000000000000000000000000000000000"
+        size: 0

tests/test_urlchecker_deb.py

@@ -0,0 +1,44 @@
+import unittest
+import os
+
+from src.manifest import ManifestChecker
+from src.lib.utils import init_logging
+from src.lib.checksums import MultiDigest
+
+TEST_MANIFEST = os.path.join(os.path.dirname(__file__), "com.tencent.WeChat.yaml")
+
+
+class TestURLChecker(unittest.IsolatedAsyncioTestCase):
+    def setUp(self):
+        init_logging()
+
+    async def test_check(self):
+        checker = ManifestChecker(TEST_MANIFEST)
+        ext_data = await checker.check()
+
+        data = self._find_by_filename(ext_data, "wechat.deb")
+        self.assertIsNotNone(data)
+        self.assertEqual(data.filename, "wechat.deb")
+        self.assertIsNotNone(data.new_version)
+        self.assertIsInstance(data.new_version.size, int)
+        self.assertGreater(data.new_version.size, 0)
+        self.assertIsNotNone(data.new_version.checksum)
+        self.assertIsInstance(data.new_version.checksum, MultiDigest)
+        self.assertNotEqual(
+            data.new_version.checksum,
+            MultiDigest(
+                sha256="0000000000000000000000000000000000000000000000000000000000000000"  # noqa: E501
+            ),
+        )
+        self.assertIsNotNone(data.new_version.version)
+
+    def _find_by_filename(self, ext_data, filename):
+        for data in ext_data:
+            if data.filename == filename:
+                return data
+        else:
+            return None
+
+
+if __name__ == "__main__":
+    unittest.main()