[telemetry] Consolidate global hooks.

tools/telemetry/telemetry/exception_formatter.py

Index: tools/telemetry/telemetry/exception_formatter.py
diff --git a/tools/telemetry/telemetry/exception_formatter.py b/tools/telemetry/telemetry/exception_formatter.py
deleted file mode 100644
index 8dafd44c2dae41923e6e446c2d92572b1b338323..0000000000000000000000000000000000000000
--- a/tools/telemetry/telemetry/exception_formatter.py
+++ /dev/null
@@ -1,82 +0,0 @@
-# Copyright 2013 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Print prettier and more detailed exceptions."""
-
-import math
-import os
-import sys
-import traceback
-
-from telemetry.core import util
-
-
-def InstallUnhandledExceptionFormatter():
-  sys.excepthook = PrintFormattedException
-
-
-def PrintFormattedException(exception_class, exception, tb):
-  """Prints an Exception in a more useful format than the default.
-
-  TODO(tonyg): Consider further enhancements. For instance:
-    - Report stacks to maintainers like depot_tools does.
-    - Add a debug flag to automatically start pdb upon exception.
-  """
-  def _GetFinalFrame(frame):
-    final_frame = None
-    while frame is not None:
-      final_frame = frame
-      frame = frame.tb_next
-    return final_frame
-
-  def _AbbreviateMiddle(target, middle, length):
-    assert length >= 0, 'Must provide positive length'
-    assert len(middle) <= length, 'middle must not be greater than length'
-    if len(target) <= length:
-      return target
-    half_length = (length - len(middle)) / 2.
-    return '%s%s%s' % (target[:int(math.floor(half_length))],
-                       middle,
-                       target[-int(math.ceil(half_length)):])
-
-  base_dir = os.path.abspath(util.GetChromiumSrcDir())
-  formatted_exception = traceback.format_exception(
-      exception_class, exception, tb)
-  extracted_tb = traceback.extract_tb(tb)
-  traceback_header = formatted_exception[0].strip()
-  exception = ''.join([l[2:] if l[:2] == '  ' else l for l in
-                       traceback.format_exception_only(exception_class,
-                                                       exception)])
-  local_variables = [(variable, value) for variable, value in
-                     _GetFinalFrame(tb).tb_frame.f_locals.iteritems()
-                     if variable != 'self']
-
-  # Format the traceback.
-  print >> sys.stderr
-  print >> sys.stderr, traceback_header
-  for filename, line, function, text in extracted_tb:
-    filename = os.path.abspath(filename)
-    if filename.startswith(base_dir):
-      filename = filename[len(base_dir)+1:]
-    print >> sys.stderr, '  %s at %s:%d' % (function, filename, line)
-    print >> sys.stderr, '    %s' % text
-
-  # Format the locals.
-  if local_variables:
-    print >> sys.stderr
-    print >> sys.stderr, 'Locals:'
-    longest_variable = max([len(v) for v, _ in local_variables])
-    for variable, value in sorted(local_variables):
-      value = repr(value)
-      possibly_truncated_value = _AbbreviateMiddle(value, ' ... ', 1024)
-      truncation_indication = ''
-      if len(possibly_truncated_value) != len(value):
-        truncation_indication = ' (truncated)'
-      print >> sys.stderr, '  %s: %s%s' % (variable.ljust(longest_variable + 1),
-                                           possibly_truncated_value,
-                                           truncation_indication)
-
-  # Format the exception.
-  print >> sys.stderr
-  print >> sys.stderr, exception