fix: link revisions on forges profile_sync skips

parse_repo knows only the forges profile_sync fetches from, so the eduke32,
fury, dgen, skyline and splitwolf pages showed no pinned revision and
their citations stayed plain code. The pages now build commit and file
links for voidpoint.io, Bitbucket, SourceForge and Software Heritage.

tests/test_site_render.py

@@ -269,5 +269,45 @@ class AnAliasTreeIsListedOnItsParentsPage(unittest.TestCase):
         self.assertEqual([t["ref"] for t in trees], ["freeintv-overlays"])
 
 
+class ForgesUpstreamDoesNotRead(unittest.TestCase):
+    """Profiles pinned on SourceForge, voidpoint.io, Bitbucket or Software
+    Heritage showed no revision, and their citations were plain code."""
+
+    def links(self, url: str, ref: str, **extra: str) -> tuple[str, str]:
+        import sitesources
+
+        profile = {"source": url, "source_commit": "f6c00044" + "0" * 32, **extra}
+        return (sitesources.revision_markdown(profile),
+                sitesources._source_ref_markdown(profile, ref))
+
+    def test_bitbucket(self):
+        revision, ref = self.links("https://bitbucket.org/linuxwolf6/splitwolf",
+                                   "id_lwmp.cpp:1831-1868", source_branch="scrubbed")
+        pin = "f6c00044" + "0" * 32
+        self.assertEqual(revision, f"[linuxwolf6/splitwolf@{pin[:12]}]"
+                         f"(https://bitbucket.org/linuxwolf6/splitwolf/commits/{pin}), "
+                         "branch `scrubbed`")
+        self.assertIn(f"(https://bitbucket.org/linuxwolf6/splitwolf/src/{pin}/"
+                      "id_lwmp.cpp#lines-1831:1868)", ref)
+
+    def test_a_gitlab_instance(self):
+        _revision, ref = self.links("https://voidpoint.io/terminx/eduke32",
+                                    "source/duke3d/src/common.cpp:36")
+        self.assertIn("https://voidpoint.io/terminx/eduke32/-/blob/f6c00044", ref)
+        self.assertIn("/source/duke3d/src/common.cpp#L36)", ref)
+
+    def test_sourceforge(self):
+        revision, ref = self.links("https://sourceforge.net/p/dgen/dgen", "rc.cpp:12")
+        self.assertIn("(https://sourceforge.net/p/dgen/dgen/ci/f6c00044", revision)
+        self.assertRegex(ref, r"\(https://sourceforge\.net/p/dgen/dgen/ci/f6c00044\w+/tree/rc\.cpp\)")
+
+    def test_software_heritage(self):
+        revision, ref = self.links(
+            "https://archive.softwareheritage.org/browse/revision/f6c00044/",
+            "app/src/os.cpp:35-36")
+        self.assertTrue(revision.startswith("[Software Heritage@f6c000440000]"))
+        self.assertIn("/browse/revision/f6c00044" + "0" * 32 + "/?path=app/src/os.cpp#L35-L36)", ref)
+
+
 if __name__ == "__main__":
     unittest.main()