workflow: less verbose naming

src/trezor/workflow.py

@@ -1,37 +1,38 @@
 from trezor import log, loop
 
-_started_workflows = []
-_default_workflow = None
-_default_workflow_genfunc = None
+_started = []
+_default = None
+_default_genfunc = None
 
 
 def start_default(genfunc):
-    global _default_workflow
-    global _default_workflow_genfunc
-    _default_workflow_genfunc = genfunc
-    _default_workflow = _default_workflow_genfunc()
-    log.info(__name__, 'starting default workflow %s', _default_workflow)
-    loop.schedule_task(_default_workflow)
+    global _default
+    global _default_genfunc
+    _default_genfunc = genfunc
+    _default = _default_genfunc()
+    log.info(__name__, 'start default %s', _default)
+    loop.schedule_task(_default)
+
+
+def close_default():
+    global _default
+    log.info(__name__, 'close default %s', _default)
+    _default.close()
+    _default = None
 
 
 def start_workflow(workflow):
-    global _default_workflow
-    if _default_workflow is not None:
-        log.info(__name__, 'closing default workflow %s', _default_workflow)
-        _default_workflow.close()
-        _default_workflow = None
-
-    log.info(__name__, 'starting workflow %s', workflow)
-    _started_workflows.append(workflow)
-    loop.schedule_task(watch_workflow(workflow))
+    if _default is not None:
+        close_default()
+    _started.append(workflow)
+    log.info(__name__, 'start %s', workflow)
+    loop.schedule_task(_watch_workflow(workflow))
 
 
-async def watch_workflow(workflow):
-    global _default_workflow
+async def _watch_workflow(workflow):
     try:
         return await workflow
     finally:
-        _started_workflows.remove(workflow)
-
-        if not _started_workflows and _default_workflow_genfunc is not None:
-            start_default(_default_workflow_genfunc)
+        _started.remove(workflow)
+        if not _started and _default_genfunc is not None:
+            start_default(_default_genfunc)