From 679147eead574d186ebf3069647b4c23e8ccace6 Mon Sep 17 00:00:00 2001 From: Zeno Albisser Date: Thu, 15 Aug 2013 21:46:11 +0200 Subject: Initial import. --- chromium/tools/metrics/histograms/diffutil.py | 47 +++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 chromium/tools/metrics/histograms/diffutil.py (limited to 'chromium/tools/metrics/histograms/diffutil.py') diff --git a/chromium/tools/metrics/histograms/diffutil.py b/chromium/tools/metrics/histograms/diffutil.py new file mode 100644 index 00000000000..0350a58c8ec --- /dev/null +++ b/chromium/tools/metrics/histograms/diffutil.py @@ -0,0 +1,47 @@ +# 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. + +"""Utility functions for prompting user if changes automatically applied to some +user-managed files are correct. +""" + +import logging +import os +import webbrowser + +from difflib import HtmlDiff +from tempfile import NamedTemporaryFile + + +def PromptUserToAcceptDiff(old_text, new_text, prompt): + """Displays a difference in two strings (old and new file contents) to the + user and asks whether the new version is acceptable. + + Args: + old_text: A string containing old file contents. + new_text: A string containing new file contents. + prompt: Text that should be displayed to the user, asking whether the new + file contents should be accepted. + + Returns: + True is user accepted the changes or there were no changes, False otherwise. + """ + logging.info('Computing diff...') + if old_text == new_text: + logging.info('No changes detected') + return True + html_diff = HtmlDiff(wrapcolumn=80).make_file( + old_text.splitlines(), new_text.splitlines(), fromdesc='Original', + todesc='Updated', context=True, numlines=5) + temp = NamedTemporaryFile(suffix='.html', delete=False) + try: + temp.write(html_diff) + temp.close() # Close the file so the browser process can access it. + webbrowser.open('file://' + temp.name) + print prompt + response = raw_input('(Y/n): ').strip().lower() + finally: + temp.close() # May be called on already closed file. + os.remove(temp.name) + return response == 'y' or response == '' -- cgit v1.2.1