[fix] Fix Version handling + passing entrypoint

this fixes version handling when doing so seperately from the image
string as well as passing an entrypoint to the image. the nixos module
requires the `entrypoint` to be a single file in PATH and all arguments
for that file in `cmd`.

src/batou_ext/oci.py

@@ -31,6 +31,7 @@ class Container(Component):
 
     # specific options
     entrypoint: Optional[str] = None
+    docker_cmd: Optional[str] = None
     envfile: Optional[str] = None
     mounts: dict = {}
     ports: dict = {}
@@ -66,6 +67,9 @@ def configure(self):
             # spec version overrides the argument provided or default version
             if spec_tag:
                 self.version = spec_tag
+            else:
+                # append version to image string when passed seperately
+                self.image = f"{self.image}:{self.version}"
         else:
             raise RuntimeError(
                 f"could not match the docker spec against the provided container image string: '{self.image}'"

src/batou_ext/resources/oci-template.nix

@@ -17,10 +17,14 @@
   virtualisation.oci-containers = {
     backend = "docker";
     containers."{{component.container_name}}" = {
-      # {% if component.entrypoint != None %}
+      # {% if component.entrypoint %}
       entrypoint = "{{component.entrypoint}}";
       # {% endif %}
 
+      # {% if component.docker_cmd %}
+      cmd = [ {% for cmd in component.docker_cmd.split(" ") %} "{{cmd}}" {% endfor %} ];
+      # {% endif %}
+
       # {% if component.registry_address %}
       login = {
         registry = "{{component.registry_address}}";

src/batou_ext/s3.py

@@ -29,7 +29,13 @@
 
 
 class S3(batou.component.Component):
-    """Configuration for an S3 connection and its credentials."""
+    """Configuration for an S3 connection and its credentials.
+
+    Keyword arguments:
+    access_key_id     -- The S3 access key ID
+    secret_access_key -- The S3 secret access key
+    endpoint_url      -- The S3 enpoint's URL
+    """
 
     _required_params_ = {
         "access_key_id": "value",