bitbake: hashserv: Add remove API

Adds a `remove` API to the client and server that can be used to remove
hash equivalence entries that match a particular critera

(Bitbake rev: 861d068b3a9fb5e91a01dbec54996a5a6f93ef29)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/hashserv/server.py

@@ -186,6 +186,7 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
                 'report-equiv': self.handle_equivreport,
                 'reset-stats': self.handle_reset_stats,
                 'backfill-wait': self.handle_backfill_wait,
+                'remove': self.handle_remove,
             })
 
     def validate_proto_version(self):
@@ -499,6 +500,33 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
         await self.backfill_queue.join()
         self.write_message(d)
 
+    async def handle_remove(self, request):
+        condition = request["where"]
+        if not isinstance(condition, dict):
+            raise TypeError("Bad condition type %s" % type(condition))
+
+        def do_remove(columns, table_name, cursor):
+            nonlocal condition
+            where = {}
+            for c in columns:
+                if c in condition and condition[c] is not None:
+                    where[c] = condition[c]
+
+            if where:
+                query = ('DELETE FROM %s WHERE ' % table_name) + ' AND '.join("%s=:%s" % (k, k) for k in where.keys())
+                cursor.execute(query, where)
+                return cursor.rowcount
+
+            return 0
+
+        count = 0
+        with closing(self.db.cursor()) as cursor:
+            count += do_remove(OUTHASH_TABLE_COLUMNS, "outhashes_v2", cursor)
+            count += do_remove(UNIHASH_TABLE_COLUMNS, "unihashes_v2", cursor)
+            self.db.commit()
+
+        self.write_message({"count": count})
+
     def query_equivalent(self, cursor, method, taskhash):
         # This is part of the inner loop and must be as fast as possible
         cursor.execute(