tools: wasptool: Better REPL integration

Add a run_command method for the "console". This allows running a command
on the target and capturing the result. Normally this is handled using
REPLWrapper but that doesn't work well with the NUS console because local
echo gets in the way.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

tools/wasptool

@@ -9,6 +9,7 @@ import random
 import os.path
 import pexpect
 import time
+import types
 import string
 import sys
 
@@ -28,6 +29,18 @@ def pbar(iterable, quiet=False):
     if not quiet:
         draw_pbar(100, quiet, None)
 
+def run_command(c, cmd):
+    """Cheap and cheerful command wrapper.
+
+    This differs from REPLWrapper because it assumes the remote end will
+    echo the characters... and that we must eat them before handing over
+    the results to the caller.
+    """
+    c.sendline(cmd)
+    c.expect_exact(cmd)
+    c.expect('>>> ')
+    return c.before.replace('\r\r\n', '\n').strip('\n')
+
 def sync(c):
     """Stop the watch and synchronize with the command prompt.
 
@@ -348,6 +361,9 @@ if __name__ == '__main__':
 
     pynus = os.path.dirname(sys.argv[0]) + '/pynus/pynus.py' + device_args
     console = pexpect.spawn(pynus, encoding='UTF-8')
+    console.run_command = types.MethodType(run_command, console)
+    console.sync = types.MethodType(sync, console)
+    console.unsync = types.MethodType(unsync, console)
     if args.verbose:
         console.logfile = sys.stdout
     else:
@@ -367,7 +383,7 @@ if __name__ == '__main__':
     macaddr = console.match.group(1)
     console.expect('Exit console using Ctrl-X')
     time.sleep(0.5)
-    sync(console)
+    console.sync()
 
     if args.rtc:
         handle_rtc(console)
@@ -412,4 +428,4 @@ if __name__ == '__main__':
         handle_reset(console, ota=True)
         sys.exit(0)
 
-    unsync(console)
+    console.unsync()