python3-dbus: re-add recipe with latest patches and add ptest

The python3-dbus package was removed in (dac933e).  While the upstream
project isn't active, other distributions (e.g. Fedora, Debian, etc)
continue to offer the package and apply patches to resolve reported issues.

While other packages offer similar functionality (e.g. dasbus), they are not
drop in replacements and the general dbus functionality works out of the box.
The python package has accomplished it's goal of providing useful functionality,
and the proposal is to continue to have it available in meta-python for use.

Signed-off-by: Derek Straka <derek@asterius.io>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 206 insertions, 0 deletions

diff --git a/meta-python/recipes-devtools/python/python3-pydbus/0002-Support-asynchronous-calls-58.patch b/meta-python/recipes-devtools/python/python3-pydbus/0002-Support-asynchronous-calls-58.patch
new file mode 100644
index 0000000000..b3c57edade
--- /dev/null
+++ b/meta-python/recipes-devtools/python/python3-pydbus/0002-Support-asynchronous-calls-58.patch
@@ -0,0 +1,206 @@
+From 31d6dd7893a5e1bb9eb14bfcee861a5b62f64960 Mon Sep 17 00:00:00 2001
+From: Vendula Poncova <vponcova@redhat.com>
+Date: Thu, 27 Jul 2017 18:41:29 +0200
+Subject: [PATCH 2/3] Support asynchronous calls (#58)
+
+Added support for asynchronous calls of methods. A method is called
+synchronously unless its callback parameter is specified. A callback
+is a function f(*args, returned=None, error=None), where args is
+callback_args specified in the method call, returned is a return
+value of the method and error is an exception raised by the method.
+
+Example of an asynchronous call:
+
+def func(x, y, returned=None, error=None):
+  pass
+
+proxy.Method(a, b, callback=func, callback_args=(x, y))
+
+Adapted from Fedora [https://src.fedoraproject.org/cgit/rpms/python-pydbus.git/]
+
+Upstream-Status: Inactive-Upstream (Last release 12/18/2016; Last commit 05/6/2018)
+
+Signed-off-by: Derek Straka <derek@asterius.io>
+---
+ doc/tutorial.rst       | 11 ++++++++-
+ pydbus/proxy_method.py | 44 ++++++++++++++++++++++++++++++-----
+ tests/publish_async.py | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
+ tests/run.sh           |  1 +
+ 4 files changed, 112 insertions(+), 7 deletions(-)
+ create mode 100644 tests/publish_async.py
+
+diff --git a/doc/tutorial.rst b/doc/tutorial.rst
+index 7474de3..b8479cf 100644
+--- a/doc/tutorial.rst
++++ b/doc/tutorial.rst
+@@ -84,7 +84,8 @@ All objects have methods, properties and signals.
+ Setting up an event loop
+ ========================
+ 
+-To handle signals emitted by exported objects, or to export your own objects, you need to setup an event loop.
++To handle signals emitted by exported objects, to asynchronously call methods
++or to export your own objects, you need to setup an event loop.
+ 
+ The only main loop supported by ``pydbus`` is GLib.MainLoop.
+ 
+@@ -156,6 +157,14 @@ To call a method::
+ 
+     dev.Disconnect()
+ 
++To asynchronously call a method::
++
++    def print_result(returned=None, error=None):
++        print(returned, error)
++
++    dev.GetAppliedConnection(0, callback=print_result)
++    loop.run()
++
+ To read a property::
+ 
+     print(dev.Autoconnect)
+diff --git a/pydbus/proxy_method.py b/pydbus/proxy_method.py
+index 3e6e6ee..442fe07 100644
+--- a/pydbus/proxy_method.py
++++ b/pydbus/proxy_method.py
+@@ -65,15 +65,34 @@ class ProxyMethod(object):
+ 
+                # Python 2 sux
+                for kwarg in kwargs:
+-                       if kwarg not in ("timeout",):
++                       if kwarg not in ("timeout", "callback", "callback_args"):
+                                raise TypeError(self.__qualname__ + " got an unexpected keyword argument '{}'".format(kwarg))
+                timeout = kwargs.get("timeout", None)
++               callback = kwargs.get("callback", None)
++               callback_args = kwargs.get("callback_args", tuple())
++
++               call_args = (
++                       instance._bus_name,
++                       instance._path,
++                       self._iface_name,
++                       self.__name__,
++                       GLib.Variant(self._sinargs, args),
++                       GLib.VariantType.new(self._soutargs),
++                       0,
++                       timeout_to_glib(timeout),
++                       None
++               )
++
++               if callback:
++                       call_args += (self._finish_async_call, (callback, callback_args))
++                       instance._bus.con.call(*call_args)
++                       return None
++               else:
++                       ret = instance._bus.con.call_sync(*call_args)
++                       return self._unpack_return(ret)
+ 
+-               ret = instance._bus.con.call_sync(
+-                       instance._bus_name, instance._path,
+-                       self._iface_name, self.__name__, GLib.Variant(self._sinargs, args), GLib.VariantType.new(self._soutargs),
+-                       0, timeout_to_glib(timeout), None).unpack()
+-
++       def _unpack_return(self, values):
++               ret = values.unpack()
+                if len(self._outargs) == 0:
+                        return None
+                elif len(self._outargs) == 1:
+@@ -81,6 +100,19 @@ class ProxyMethod(object):
+                else:
+                        return ret
+ 
++       def _finish_async_call(self, source, result, user_data):
++               error = None
++               return_args = None
++
++               try:
++                       ret = source.call_finish(result)
++                       return_args = self._unpack_return(ret)
++               except Exception as err:
++                       error = err
++
++               callback, callback_args = user_data
++               callback(*callback_args, returned=return_args, error=error)
++
+        def __get__(self, instance, owner):
+                if instance is None:
+                        return self
+diff --git a/tests/publish_async.py b/tests/publish_async.py
+new file mode 100644
+index 0000000..3f79b62
+--- /dev/null
++++ b/tests/publish_async.py
+@@ -0,0 +1,63 @@
++from pydbus import SessionBus
++from gi.repository import GLib
++from threading import Thread
++import sys
++
++done = 0
++loop = GLib.MainLoop()
++
++class TestObject(object):
++       '''
++<node>
++       <interface name='net.lew21.pydbus.tests.publish_async'>
++               <method name='HelloWorld'>
++                       <arg type='i' name='x' direction='in'/>
++                       <arg type='s' name='response' direction='out'/>
++               </method>
++       </interface>
++</node>
++       '''
++       def __init__(self, id):
++               self.id = id
++
++       def HelloWorld(self, x):
++               res = self.id + ": " + str(x)
++               print(res)
++               return res
++
++bus = SessionBus()
++
++with bus.publish("net.lew21.pydbus.tests.publish_async", TestObject("Obj")):
++       remote = bus.get("net.lew21.pydbus.tests.publish_async")
++
++       def callback(x, returned=None, error=None):
++               print("asyn: " + returned)
++               assert (returned is not None)
++               assert(error is None)
++               assert(x == int(returned.split()[1]))
++
++               global done
++               done += 1
++               if done == 3:
++                       loop.quit()
++
++       def t1_func():
++               remote.HelloWorld(1, callback=callback, callback_args=(1,))
++               remote.HelloWorld(2, callback=callback, callback_args=(2,))
++               print("sync: " + remote.HelloWorld(3))
++               remote.HelloWorld(4, callback=callback, callback_args=(4,))
++
++       t1 = Thread(None, t1_func)
++       t1.daemon = True
++
++       def handle_timeout():
++               print("ERROR: Timeout.")
++               sys.exit(1)
++
++       GLib.timeout_add_seconds(2, handle_timeout)
++
++       t1.start()
++
++       loop.run()
++
++       t1.join()
+diff --git a/tests/run.sh b/tests/run.sh
+index 8d93644..271c58a 100755
+--- a/tests/run.sh
++++ b/tests/run.sh
+@@ -15,4 +15,5 @@ then
+        "$PYTHON" $TESTS_DIR/publish.py
+        "$PYTHON" $TESTS_DIR/publish_properties.py
+        "$PYTHON" $TESTS_DIR/publish_multiface.py
++       "$PYTHON" $TESTS_DIR/publish_async.py
+ fi
+-- 
+2.13.5