Support -H=host notation for interactive run/execs

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

compose/cli/main.py

@@ -1418,7 +1418,7 @@ def call_docker(args, dockeropts):
     if verify:
         tls_options.append('--tlsverify')
     if host:
-        tls_options.extend(['--host', host])
+        tls_options.extend(['--host', host.lstrip('=')])
 
     args = [executable_path] + tls_options + args
     log.debug(" ".join(map(pipes.quote, args)))

tests/acceptance/cli_test.py

@@ -177,6 +177,13 @@ class CLITestCase(DockerClientTestCase):
             returncode=0
         )
 
+    def test_shorthand_host_opt_interactive(self):
+        self.dispatch(
+            ['-H={0}'.format(os.environ.get('DOCKER_HOST', 'unix://')),
+             'run', 'another', 'ls'],
+            returncode=0
+        )
+
     def test_host_not_reachable(self):
         result = self.dispatch(['-H=tcp://doesnotexist:8000', 'ps'], returncode=1)
         assert "Couldn't connect to Docker daemon" in result.stderr

tests/unit/cli/main_test.py

@@ -154,3 +154,11 @@ class TestCallDocker(object):
         assert fake_call.call_args[0][0] == [
             'docker', '--host', 'tcp://mydocker.net:2333', 'ps'
         ]
+
+    def test_with_host_option_shorthand_equal(self):
+        with mock.patch('subprocess.call') as fake_call:
+            call_docker(['ps'], {'--host': '=tcp://mydocker.net:2333'})
+
+        assert fake_call.call_args[0][0] == [
+            'docker', '--host', 'tcp://mydocker.net:2333', 'ps'
+        ]