Propagate package version collection errors to caller (#199)

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

AUTHORS.rst

@@ -6,3 +6,4 @@ The following organizations or individuals have contributed to this repo:
 - Steven Esser @ majurg
 - Tushar Goel @ TG1999
 - Thomas Druez @ tdruez
+- Keshav Priyadarshi @ keshav-space

src/fetchcode/package_versions.py

@@ -58,7 +58,8 @@ def versions(purl):
         try:
             return router.process(purl)
         except NoRouteAvailable:
-            return
+            logger.error(f"Unsupported purl: {purl}")
+            raise
 
 
 @dataclasses.dataclass(frozen=True)
@@ -521,7 +522,7 @@ def get_response(url, content_type="json", headers=None):
         logger.error(
             f"HTTP error occurred: {http_err} \n {traceback.format_exc()}",
         )
-        return
+        raise
 
     if content_type == "binary":
         return resp.content