New buckets for 0.6.0: small changes

- Fix bucket delete

- fix merge of bucket creation date

- Replace deletable with option in aliases
    Rationale: if two aliases point to conflicting bucket, resolving
    by making an arbitrary choice risks making data accessible when it
    shouldn't be. We'd rather resolve to deleting the alias until
    someone puts it back.

src/api/api_server.rs

@@ -7,7 +7,6 @@ use hyper::server::conn::AddrStream;
 use hyper::service::{make_service_fn, service_fn};
 use hyper::{Body, Request, Response, Server};
 
-use garage_util::crdt;
 use garage_util::data::*;
 use garage_util::error::Error as GarageError;
 
@@ -306,8 +305,7 @@ async fn resolve_bucket(
 		.as_option()
 		.ok_or_else(|| Error::Forbidden("Operation is not allowed for this key.".to_string()))?;
 
-	if let Some(crdt::Deletable::Present(bucket_id)) = api_key_params.local_aliases.get(bucket_name)
-	{
+	if let Some(Some(bucket_id)) = api_key_params.local_aliases.get(bucket_name) {
 		Ok(*bucket_id)
 	} else {
 		Ok(garage

src/api/s3_bucket.rs

@@ -65,8 +65,8 @@ pub async fn handle_list_buckets(garage: &Garage, api_key: &Key) -> Result<Respo
 					if *active {
 						let alias_ent = garage.bucket_alias_table.get(&EmptyKey, alias).await?;
 						if let Some(alias_ent) = alias_ent {
-							if let Some(alias_p) = alias_ent.state.get().as_option() {
-								if alias_p.bucket_id == *bucket_id {
+							if let Some(alias_bucket) = alias_ent.state.get() {
+								if alias_bucket == bucket_id {
 									aliases.insert(alias_ent.name().to_string(), *bucket_id);
 								}
 							}
@@ -78,8 +78,8 @@ pub async fn handle_list_buckets(garage: &Garage, api_key: &Key) -> Result<Respo
 		}
 	}
 
-	for (alias, _, id) in key_state.local_aliases.items() {
-		if let Some(id) = id.as_option() {
+	for (alias, _, id_opt) in key_state.local_aliases.items() {
+		if let Some(id) = id_opt {
 			aliases.insert(alias.clone(), *id);
 		}
 	}