slightly deduplicate code from previous commit

setupsrc/pypdfium2_setup/packaging_base.py

@@ -145,23 +145,23 @@ def get_latest():
         return int( tag.split("/")[-1] )
 
     @staticmethod
-    @functools.lru_cache(maxsize=1)
-    def get_latest_conda_pdfium():
-        search = run_conda_search("pdfium-binaries", "bblanchon")
-        get_version = lambda d: int(d["version"].split(".")[2])
-        search = sorted(search, key=lambda d: get_version(d), reverse=True)
-        result = get_version(search[0])
-        print(f"Resolved latest conda pdfium to {result}", file=sys.stderr)
+    @functools.lru_cache(maxsize=2)
+    def _get_latest_conda_for(package, channel, v_func):
+        search = run_conda_search(package, channel)
+        search = sorted(search, key=lambda d: v_func(d["version"]), reverse=True)
+        result = v_func(search[0]["version"])
+        print(f"Resolved latest {channel}::{package} to {result}", file=sys.stderr)
         return result
 
-    @staticmethod
-    @functools.lru_cache(maxsize=1)
+    def get_latest_conda_pdfium():
+        return PdfiumVer._get_latest_conda_for(
+            "pdfium-binaries", "bblanchon", lambda v: int(v.split(".")[2])
+        )
+
     def get_latest_conda_bindings():
-        search = run_conda_search("pypdfium2_raw", "pypdfium2-team")
-        search = sorted(search, key=lambda d: int(d["version"]), reverse=True)
-        result = int(search[0]["version"])
-        print(f"Resolved latest conda pdfium to {result}", file=sys.stderr)
-        return result
+        return PdfiumVer._get_latest_conda_for(
+            "pypdfium2_raw", "pypdfium2-team", lambda v: int(v)
+        )
 
     @classmethod
     def to_full(cls, v_short):