Make user_agent a parameter of GitHubSession

So it can be set when used by other packages

swh/lister/github/lister.py

@@ -14,6 +14,7 @@ import iso8601
 from swh.scheduler.interface import SchedulerInterface
 from swh.scheduler.model import ListedOrigin
 
+from .. import USER_AGENT
 from ..pattern import CredentialsType, Lister
 from .utils import GitHubSession, MissingRateLimitReset
 
@@ -85,7 +86,9 @@ class GitHubLister(Lister[GitHubListerState, List[Dict[str, Any]]]):
 
         self.relisting = self.first_id is not None or self.last_id is not None
 
-        self.github_session = GitHubSession(credentials=self.credentials)
+        self.github_session = GitHubSession(
+            credentials=self.credentials, user_agent=USER_AGENT
+        )
 
     def state_from_dict(self, d: Dict[str, Any]) -> GitHubListerState:
         return GitHubListerState(**d)

swh/lister/github/utils.py

@@ -17,8 +17,6 @@ from tenacity import (
     wait_exponential,
 )
 
-from .. import USER_AGENT
-
 logger = logging.getLogger(__name__)
 
 
@@ -52,7 +50,9 @@ class GitHubSession:
     """Manages a :class:`requests.Session` with (optionally) multiple credentials,
     and cycles through them when reaching rate-limits."""
 
-    def __init__(self, credentials: Optional[List[Dict[str, str]]] = None) -> None:
+    def __init__(
+        self, user_agent: str, credentials: Optional[List[Dict[str, str]]] = None
+    ) -> None:
         """Initialize a requests session with the proper headers for requests to
         GitHub."""
         self.credentials = credentials
@@ -62,7 +62,7 @@ class GitHubSession:
         self.session = requests.Session()
 
         self.session.headers.update(
-            {"Accept": "application/vnd.github.v3+json", "User-Agent": USER_AGENT}
+            {"Accept": "application/vnd.github.v3+json", "User-Agent": user_agent}
         )
 
         self.anonymous = not self.credentials