Add support for experimental platform flag in build and pull

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

docker/api/build.py

@@ -19,7 +19,7 @@ class BuildApiMixin(object):
               forcerm=False, dockerfile=None, container_limits=None,
               decode=False, buildargs=None, gzip=False, shmsize=None,
               labels=None, cache_from=None, target=None, network_mode=None,
-              squash=None, extra_hosts=None):
+              squash=None, extra_hosts=None, platform=None):
         """
         Similar to the ``docker build`` command. Either ``path`` or ``fileobj``
         needs to be set. ``path`` can be a local path (to a directory
@@ -103,6 +103,7 @@ class BuildApiMixin(object):
                 single layer.
             extra_hosts (dict): Extra hosts to add to /etc/hosts in building
                 containers, as a mapping of hostname to IP address.
+            platform (str): Platform in the format ``os[/arch[/variant]]``
 
         Returns:
             A generator for the build output.
@@ -243,6 +244,13 @@ class BuildApiMixin(object):
                 extra_hosts = utils.format_extra_hosts(extra_hosts)
             params.update({'extrahosts': extra_hosts})
 
+        if platform is not None:
+            if utils.version_lt(self._version, '1.32'):
+                raise errors.InvalidVersion(
+                    'platform was only introduced in API version 1.32'
+                )
+            params['platform'] = platform
+
         if context is not None:
             headers = {'Content-Type': 'application/tar'}
             if encoding:

docker/api/image.py

@@ -323,7 +323,8 @@ class ImageApiMixin(object):
         return self._result(self._post(url, params=params), True)
 
     def pull(self, repository, tag=None, stream=False,
-             insecure_registry=False, auth_config=None, decode=False):
+             insecure_registry=False, auth_config=None, decode=False,
+             platform=None):
         """
         Pulls an image. Similar to the ``docker pull`` command.
 
@@ -336,6 +337,7 @@ class ImageApiMixin(object):
                 :py:meth:`~docker.api.daemon.DaemonApiMixin.login` has set for
                 this request. ``auth_config`` should contain the ``username``
                 and ``password`` keys to be valid.
+            platform (str): Platform in the format ``os[/arch[/variant]]``
 
         Returns:
             (generator or str): The output
@@ -376,7 +378,7 @@ class ImageApiMixin(object):
         }
         headers = {}
 
-        if utils.compare_version('1.5', self._version) >= 0:
+        if utils.version_gte(self._version, '1.5'):
             if auth_config is None:
                 header = auth.get_config_header(self, registry)
                 if header:
@@ -385,6 +387,13 @@ class ImageApiMixin(object):
                 log.debug('Sending supplied auth config')
                 headers['X-Registry-Auth'] = auth.encode_header(auth_config)
 
+        if platform is not None:
+            if utils.version_lt(self._version, '1.32'):
+                raise errors.InvalidVersion(
+                    'platform was only introduced in API version 1.32'
+                )
+            params['platform'] = platform
+
         response = self._post(
             self._url('/images/create'), params=params, headers=headers,
             stream=stream, timeout=None

docker/models/containers.py

@@ -579,6 +579,8 @@ class ContainerCollection(Collection):
                 inside the container.
             pids_limit (int): Tune a container's pids limit. Set ``-1`` for
                 unlimited.
+            platform (str): Platform in the format ``os[/arch[/variant]]``.
+                Only used if the method needs to pull the requested image.
             ports (dict): Ports to bind inside the container.
 
                 The keys of the dictionary are the ports to bind inside the
@@ -700,7 +702,9 @@ class ContainerCollection(Collection):
         if isinstance(image, Image):
             image = image.id
         stream = kwargs.pop('stream', False)
-        detach = kwargs.pop("detach", False)
+        detach = kwargs.pop('detach', False)
+        platform = kwargs.pop('platform', None)
+
         if detach and remove:
             if version_gte(self.client.api._version, '1.25'):
                 kwargs["auto_remove"] = True
@@ -718,7 +722,7 @@ class ContainerCollection(Collection):
             container = self.create(image=image, command=command,
                                     detach=detach, **kwargs)
         except ImageNotFound:
-            self.client.images.pull(image)
+            self.client.images.pull(image, platform=platform)
             container = self.create(image=image, command=command,
                                     detach=detach, **kwargs)
 

docker/models/images.py

@@ -157,6 +157,7 @@ class ImageCollection(Collection):
                 single layer.
             extra_hosts (dict): Extra hosts to add to /etc/hosts in building
                 containers, as a mapping of hostname to IP address.
+            platform (str): Platform in the format ``os[/arch[/variant]]``.
 
         Returns:
             (:py:class:`Image`): The built image.
@@ -265,6 +266,7 @@ class ImageCollection(Collection):
                 :py:meth:`~docker.client.DockerClient.login` has set for
                 this request. ``auth_config`` should contain the ``username``
                 and ``password`` keys to be valid.
+            platform (str): Platform in the format ``os[/arch[/variant]]``
 
         Returns:
             (:py:class:`Image`): The image that has been pulled.

tests/integration/api_build_test.py

@@ -377,3 +377,18 @@ class BuildTest(BaseAPIIntegrationTest):
     def test_build_gzip_custom_encoding(self):
         with self.assertRaises(errors.DockerException):
             self.client.build(path='.', gzip=True, encoding='text/html')
+
+    @requires_api_version('1.32')
+    @requires_experimental(until=None)
+    def test_build_invalid_platform(self):
+        script = io.BytesIO('FROM busybox\n'.encode('ascii'))
+
+        with pytest.raises(errors.APIError) as excinfo:
+            stream = self.client.build(
+                fileobj=script, stream=True, platform='foobar'
+            )
+            for _ in stream:
+                pass
+
+        assert excinfo.value.status_code == 400
+        assert 'invalid platform' in excinfo.exconly()

tests/integration/api_image_test.py

@@ -14,7 +14,7 @@ from six.moves import socketserver
 
 import docker
 
-from ..helpers import requires_api_version
+from ..helpers import requires_api_version, requires_experimental
 from .base import BaseAPIIntegrationTest, BUSYBOX
 
 
@@ -67,6 +67,15 @@ class PullImageTest(BaseAPIIntegrationTest):
         img_info = self.client.inspect_image('hello-world')
         self.assertIn('Id', img_info)
 
+    @requires_api_version('1.32')
+    @requires_experimental(until=None)
+    def test_pull_invalid_platform(self):
+        with pytest.raises(docker.errors.APIError) as excinfo:
+            self.client.pull('hello-world', platform='foobar')
+
+        assert excinfo.value.status_code == 500
+        assert 'invalid platform' in excinfo.exconly()
+
 
 class CommitTest(BaseAPIIntegrationTest):
     def test_commit(self):

tests/unit/models_containers_test.py

@@ -225,7 +225,7 @@ class ContainerCollectionTest(unittest.TestCase):
         container = client.containers.run('alpine', 'sleep 300', detach=True)
 
         assert container.id == FAKE_CONTAINER_ID
-        client.api.pull.assert_called_with('alpine', tag=None)
+        client.api.pull.assert_called_with('alpine', platform=None, tag=None)
 
     def test_run_with_error(self):
         client = make_fake_client()