Try to fetch the element as deleted if initial access failed

The reference to the object might be already deleted by when the
request is failing. plus setting deleted=0 is rejected by the API.
So try with deleted=1 if and only if the previous access failed.

lib/lfs_oid.py

@@ -68,7 +68,7 @@ class LFSOid:
             row = cur.fetchone()
             lfs_oid_id = row[0]
             cur.execute(
-                """INSERT INTO lfs_oid_in_package (package,filename,lfs_oid_id) 
+                """INSERT INTO lfs_oid_in_package (package,filename,lfs_oid_id)
                         VALUES (%s,%s,%s)""",
                 (package, filename, lfs_oid_id),
             )
@@ -133,6 +133,7 @@ class LFSOid:
             json=data,
             timeout=10,
         )
+        response.raise_for_status()
         logging.info(f"Register LFS returned {response.status_code}")
 
 
@@ -167,7 +168,7 @@ if __name__ == "__main__":
         cur.execute(
             """
             CREATE TEMPORARY TABLE lfs_oid_in_revision (
-                revision_id INTEGER, 
+                revision_id INTEGER,
                 lfs_oid_id  INTEGER NOT NULL,
                 name        VARCHAR(255) NOT NULL
             )

lib/obs.py

@@ -148,12 +148,28 @@ class OBS:
         ]
 
     def _download(self, project, package, name, revision):
+        # the object might be deleted but we can only pass deleted=1
+        # if it is actually deleted
+        deleted = 0
+        while deleted < 2:
+            url = osc.core.makeurl(
+                self.url,
+                ["source", project, package, urllib.parse.quote(name)],
+                {"rev": revision, "expand": 1, "deleted": deleted if deleted else ()},
+            )
+            try:
+                osc.core.http_request("HEAD", url)
+                break
+            except Exception:
+                pass
+            deleted += 1
+
         url = osc.core.makeurl(
-            self.url,
-            ["source", project, package, urllib.parse.quote(name)],
-            {"rev": revision, "expand": 1},
-        )
-        return osc.core.http_GET(url)
+                self.url,
+                ["source", project, package, urllib.parse.quote(name)],
+                {"rev": revision, "expand": 1, "deleted": 1 if deleted else ()},
+            )
+        return osc.core.http_request("GET", url)
 
     def download(
         self,