initial tracing for unic console

Author: RonnyPfannschmidt

pyrepl/trace.py

@@ -0,0 +1,17 @@
+import os
+
+trace_filename = os.environ.get("PYREPL_TRACE")
+
+if trace_filename is not None:
+    trace_file = open(trace_filename, 'a')
+else:
+    trace_file = None
+
+def trace(line, *k, **kw):
+    if trace_file is None:
+        return
+    if k or kw:
+        line = line.format(*k, **kw)
+    trace_file.write(line+'\n')
+    trace_file.flush()
+

pyrepl/unix_console.py

@@ -26,6 +26,7 @@
 from .fancy_termios import tcgetattr, tcsetattr
 from .console import Console, Event
 from .unix_eventqueue import EventQueue
+from .trace import trace
 
 class InvalidTerminal(RuntimeError):
     pass
@@ -410,6 +411,7 @@ def __sigwinch(self, signum, frame):
         self.event_queue.insert(Event('resize', None))
 
     def push_char(self, char):
+        trace('push char {char!r}', char=char)
         self.partial_char += char
         try:
             c = self.partial_char.decode(self.encoding)