Experiment with transfering via tar archives

core/testcontainers/core/generic.py

@@ -71,7 +71,11 @@ def start(self) -> "DbContainer":
         self._configure()
         super().start()
         self._connect()
+        self._transfer_seed()
         return self
 
     def _configure(self) -> None:
         raise NotImplementedError
+
+    def _transfer_seed(self) -> None:
+        pass

modules/mysql/testcontainers/mysql/__init__.py

@@ -11,7 +11,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 import re
+import tarfile
+from io import BytesIO
 from os import environ
+from pathlib import Path
 from typing import Optional
 
 from testcontainers.core.generic import DbContainer
@@ -85,7 +88,7 @@ def __init__(
         if self.username == "root":
             self.root_password = self.password
         if seed is not None:
-            self.with_volume_mapping(seed, "/docker-entrypoint-initdb.d/")
+            self.seed = seed
 
     def _configure(self) -> None:
         self.with_env("MYSQL_ROOT_PASSWORD", self.root_password)
@@ -105,3 +108,12 @@ def get_connection_url(self) -> str:
         return super()._create_connection_url(
             dialect="mysql+pymysql", username=self.username, password=self.password, dbname=self.dbname, port=self.port
         )
+
+    def _transfer_seed(self) -> None:
+        src_path = Path(self.seed)
+        dest_path = "/docker-entrypoint-initdb.d/"
+        with BytesIO() as archive, tarfile.TarFile(fileobj=archive, mode="w") as tar:
+            for filename in src_path.iterdir():
+                tar.add(filename.absolute(), arcname=filename.relative_to(src_path))
+            archive.seek(0)
+            self.get_wrapped_container().put_archive(dest_path, archive)