dispatch: have dispatch.dispatch and dispatch._runcatch emit trace events

Differential Revision: https://phab.mercurial-scm.org/D4345

mercurial/dispatch.py

@@ -21,6 +21,8 b' import traceback'
 
 from .i18n import _
 
+from hgdemandimport import tracing
+
 from . import (
     cmdutil,
     color,
@@ -84,6 +86,7 b' class request(object):'
 def run():
     "run the command in sys.argv"
     initstdio()
+    with tracing.log('parse args into request'):
     req = request(pycompat.sysargv[1:])
     err = None
     try:
@@ -176,6 +179,7 b' def _formatargs(args):'
 
 def dispatch(req):
     """run the command specified in req.args; returns an integer status code"""
+    with tracing.log('dispatch.dispatch'):
     if req.ferr:
         ferr = req.ferr
     elif req.ui:
@@ -247,6 +251,7 b' def dispatch(req):'
     return ret
 
 def _runcatch(req):
+    with tracing.log('dispatch._runcatch'):
     def catchterm(*args):
         raise error.SignalInterrupt
 
@@ -262,7 +267,8 b' def _runcatch(req):'
     def _runcatchfunc():
         realcmd = None
         try:
-            cmdargs = fancyopts.fancyopts(req.args[:], commands.globalopts, {})
+                cmdargs = fancyopts.fancyopts(
+                    req.args[:], commands.globalopts, {})
             cmd = cmdargs[0]
             aliases, entry = cmdutil.findcmd(cmd, commands.table, False)
             realcmd = aliases[0]
@@ -350,7 +356,6 b' def _runcatch(req):'
                 traceback.print_exc()
                 debugmortem[debugger](sys.exc_info()[2])
             raise
-
     return _callcatch(ui, _runcatchfunc)
 
 def _callcatch(ui, func):