fix: properly extract tags with forward slashes (#5928)

Fixes extracting tags from the `github` source (atom feed with URLs of
the form `https://github.com/<owner>/<repo>/releases/tag/<tag>`).

Before, when a tag contained a slash like e.g. `sass_api/17.5.0`,
everything up to and including the last slash was stripped prematurely,
wrongly passing `17.5.0` instead of the full `sass_api/17.5.0` tag name
when evaluating `is_tag_ignored()`. As a consequence, the
[`bot.version_updates.allowed_tag_globs`](https://conda-forge.org/docs/maintainer/conda_forge_yml/#bot)
config setting wouldn't work as intended.

Author: salim-b

conda_forge_tick/update_sources.py

@@ -211,11 +211,16 @@ def get_version(self, url: str, node_attrs: AttrsTypedDict) -> str | None:
         vers = []
 
         for entry in data["entries"]:
-            ver = urllib.parse.unquote(entry["link"]).split("/")[-1]
+            ver = urllib.parse.unquote(entry["link"].split("/")[-1])
 
             if is_tag_ignored(node_attrs, ver):
                 continue
 
+            # Strip scope prefix (e.g. "sass_api/" from "sass_api/17.5.0") so
+            # subsequent dev-version checks only operate on the version part.
+            if "/" in ver:
+                ver = ver.rsplit("/", 1)[1]
+
             for prefix in self.ver_prefix_remove:
                 if ver.startswith(prefix):
                     ver = ver[len(prefix) :]

tests/test_upstream_versions.py

@@ -2013,6 +2013,39 @@ def test_github_version_prefix(url, version, version_prefix, tmpdir):
         assert gh.version_prefix == version_prefix
 
 
+@mock.patch("conda_forge_tick.update_sources.feedparser.parse")
+def test_github_release_tag_with_slash_respects_allowed_tag_globs(
+    feedparser_parse_mock: MagicMock,
+):
+    feedparser_parse_mock.return_value = {
+        "bozo": 0,
+        "entries": [
+            {
+                "link": "https://github.com/sass/dart-sass/releases/tag/sass_api%2F17.5.0",
+            },
+            {
+                "link": "https://github.com/sass/dart-sass/releases/tag/sass_api%2F17.4.0",
+            },
+        ],
+    }
+
+    node_attrs = {
+        "conda-forge.yml": {
+            "bot": {
+                "version_updates": {
+                    "allowed_tag_globs": "sass_api/*",
+                },
+            },
+        },
+    }
+
+    gh = Github()
+    assert (
+        gh.get_version("https://github.com/sass/dart-sass/releases.atom", node_attrs)
+        == "17.5.0"
+    )
+
+
 @pytest.mark.parametrize(
     "url, feedstock_version",
     [