Sortal_feed.SyncFeed sync orchestration.
Fetches feeds, merges with existing data, and updates metadata. Each format uses an appropriate merge strategy:
Syndic.Atom.aggregateval sync_feed :
session:Requests.t ->
store:Sortal_feed__.Sortal_feed_store.t ->
handle:string ->
?force:bool ->
Sortal_schema.Feed.t ->
(sync_result, string) resultval sync_all :
session:Requests.t ->
store:Sortal_feed__.Sortal_feed_store.t ->
handle:string ->
?force:bool ->
Sortal_schema.Feed.t list ->
(sync_result list, string) result