Expose `timestamps`, `since` args in Container.logs

Behavior is defined as what docker does

needed for avoiding duplicate log statements

repo2docker/docker.py

@@ -13,8 +13,8 @@ class DockerContainer(Container):
     def reload(self):
         return self._c.reload()
 
-    def logs(self, *, stream=False):
-        return self._c.logs(stream=stream)
+    def logs(self, *, stream=False, timestamps=False, since=None):
+        return self._c.logs(stream=stream, timestamps=timestamps, since=since)
 
     def kill(self, *, signal="KILL"):
         return self._c.kill(signal=signal)

repo2docker/engine.py

@@ -21,7 +21,7 @@ class Container(ABC):
         """
 
     @abstractmethod
-    def logs(self, *, stream=False):
+    def logs(self, *, stream=False, timestamps=False, since=None):
         """
         Get the container logs.
 
@@ -29,6 +29,13 @@ class Container(ABC):
         ----------
         stream : bool
             If `True` return an iterator over the log lines, otherwise return all logs
+        timestamps : bool
+            If `True` log lines will be prefixed with iso8601 timestamps followed by space
+        since : int
+            An integer timestamp.
+            Can be constructed by parsing timestamps in prefixed lines issued when `timestamps=True`.
+            If given, start logs from this point,
+            instead of from container start.
 
         Returns
         -------