Properly support pulling all tags in DockerClient.images.pull

Signed-off-by: Joffrey F <joffrey@docker.com>

docker/models/images.py

@@ -5,6 +5,7 @@ import six
 
 from ..api import APIClient
 from ..errors import BuildError, ImageLoadError
+from ..utils import parse_repository_tag
 from ..utils.json_stream import json_stream
 from .resource import Collection, Model
 
@@ -269,6 +270,8 @@ class ImageCollection(Collection):
         """
         Pull an image of the given name and return it. Similar to the
         ``docker pull`` command.
+        If no tag is specified, all tags from that repository will be
+        pulled.
 
         If you want to get the raw pull output, use the
         :py:meth:`~docker.api.image.ImageApiMixin.pull` method in the
@@ -285,7 +288,9 @@ class ImageCollection(Collection):
             platform (str): Platform in the format ``os[/arch[/variant]]``
 
         Returns:
-            (:py:class:`Image`): The image that has been pulled.
+            (:py:class:`Image` or list): The image that has been pulled.
+                If no ``tag`` was specified, the method will return a list
+                of :py:class:`Image` objects belonging to this repository.
 
         Raises:
             :py:class:`docker.errors.APIError`
@@ -293,10 +298,19 @@ class ImageCollection(Collection):
 
         Example:
 
-            >>> image = client.images.pull('busybox')
+            >>> # Pull the image tagged `latest` in the busybox repo
+            >>> image = client.images.pull('busybox:latest')
+
+            >>> # Pull all tags in the busybox repo
+            >>> images = client.images.pull('busybox')
         """
+        if not tag:
+            name, tag = parse_repository_tag(name)
+
         self.client.api.pull(name, tag=tag, **kwargs)
-        return self.get('{0}:{1}'.format(name, tag) if tag else name)
+        if tag:
+            return self.get('{0}:{1}'.format(name, tag))
+        return self.list(name)
 
     def push(self, repository, tag=None, **kwargs):
         return self.client.api.push(repository, tag=tag, **kwargs)

tests/integration/models_images_test.py

@@ -74,6 +74,12 @@ class ImageCollectionTest(BaseIntegrationTest):
         image = client.images.pull('alpine', tag='3.3')
         assert 'alpine:3.3' in image.attrs['RepoTags']
 
+    def test_pull_multiple(self):
+        client = docker.from_env(version=TEST_API_VERSION)
+        images = client.images.pull('hello-world')
+        assert len(images) == 1
+        assert 'hello-world:latest' in images[0].attrs['RepoTags']
+
     def test_load_error(self):
         client = docker.from_env(version=TEST_API_VERSION)
         with pytest.raises(docker.errors.ImageLoadError):

tests/integration/models_services_test.py

@@ -1,12 +1,12 @@
 import unittest
 
 import docker
+import pytest
 
 from .. import helpers
 from .base import TEST_API_VERSION
 from docker.errors import InvalidArgument
 from docker.types.services import ServiceMode
-import pytest
 
 
 class ServiceTest(unittest.TestCase):
@@ -182,6 +182,7 @@ class ServiceTest(unittest.TestCase):
         service.reload()
         assert not service.attrs['Spec'].get('Labels')
 
+    @pytest.mark.xfail(reason='Flaky test')
     def test_update_retains_networks(self):
         client = docker.from_env(version=TEST_API_VERSION)
         network_name = helpers.random_name()

tests/unit/models_images_test.py

@@ -41,9 +41,22 @@ class ImageCollectionTest(unittest.TestCase):
 
     def test_pull(self):
         client = make_fake_client()
-        image = client.images.pull('test_image')
+        image = client.images.pull('test_image:latest')
+        client.api.pull.assert_called_with('test_image', tag='latest')
+        client.api.inspect_image.assert_called_with('test_image:latest')
+        assert isinstance(image, Image)
+        assert image.id == FAKE_IMAGE_ID
+
+    def test_pull_multiple(self):
+        client = make_fake_client()
+        images = client.images.pull('test_image')
         client.api.pull.assert_called_with('test_image', tag=None)
-        client.api.inspect_image.assert_called_with('test_image')
+        client.api.images.assert_called_with(
+            all=False, name='test_image', filters=None
+        )
+        client.api.inspect_image.assert_called_with(FAKE_IMAGE_ID)
+        assert len(images) == 1
+        image = images[0]
         assert isinstance(image, Image)
         assert image.id == FAKE_IMAGE_ID