python/machine.py: reorder __init__

Put the init arg handling all at the top, and mostly in order (deviating
when one is dependent on another), and put what is effectively runtime
state declaration at the bottom.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20201006235817.3280413-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>

1 files changed, 25 insertions, 19 deletions

diff --git a/python/qemu/machine.py b/python/qemu/machine.py
index 3017ec0..71fe58b 100644
--- a/python/qemu/machine.py
+++ b/python/qemu/machine.py
@@ -84,42 +84,54 @@ class QEMUMachine:
         @param monitor_address: address for QMP monitor
         @param socket_scm_helper: helper program, required for send_fd_scm()
         @param sock_dir: where to create socket (overrides test_dir for sock)
-        @param console_log: (optional) path to console log file
         @param drain_console: (optional) True to drain console socket to buffer
+        @param console_log: (optional) path to console log file
         @note: Qemu process is not started until launch() is used.
         '''
+        # Direct user configuration
+
+        self._binary = binary
+
         if args is None:
             args = []
+        # Copy mutable input: we will be modifying our copy
+        self._args = list(args)
+
         if wrapper is None:
             wrapper = []
-        if name is None:
-            name = "qemu-%d" % os.getpid()
-        if sock_dir is None:
-            sock_dir = test_dir
-        self._name = name
+        self._wrapper = wrapper
+
+        self._name = name or "qemu-%d" % os.getpid()
+        self._test_dir = test_dir
+        self._sock_dir = sock_dir or self._test_dir
+        self._socket_scm_helper = socket_scm_helper
+
         if monitor_address is not None:
             self._monitor_address = monitor_address
             self._remove_monitor_sockfile = False
         else:
             self._monitor_address = os.path.join(
-                sock_dir, f"{name}-monitor.sock"
+                self._sock_dir, f"{self._name}-monitor.sock"
             )
             self._remove_monitor_sockfile = True
+
+        self._console_log_path = console_log
+        if self._console_log_path:
+            # In order to log the console, buffering needs to be enabled.
+            self._drain_console = True
+        else:
+            self._drain_console = drain_console
+
+        # Runstate
         self._qemu_log_path = None
         self._qemu_log_file = None
         self._popen = None
-        self._binary = binary
-        self._args = list(args)     # Force copy args in case we modify them
-        self._wrapper = wrapper
         self._events = []
         self._iolog = None
-        self._socket_scm_helper = socket_scm_helper
         self._qmp_set = True   # Enable QMP monitor by default.
         self._qmp = None
         self._qemu_full_args = None
-        self._test_dir = test_dir
         self._temp_dir = None
-        self._sock_dir = sock_dir
         self._launched = False
         self._machine = None
         self._console_index = 0
@@ -129,12 +141,6 @@ class QEMUMachine:
         self._console_socket = None
         self._remove_files = []
         self._user_killed = False
-        self._console_log_path = console_log
-        if self._console_log_path:
-            # In order to log the console, buffering needs to be enabled.
-            self._drain_console = True
-        else:
-            self._drain_console = drain_console
 
     def __enter__(self):
         return self