1# Copyright (c) 2010 Google Inc. All rights reserved. 2# 3# Redistribution and use in source and binary forms, with or without 4# modification, are permitted provided that the following conditions are 5# met: 6# 7# * Redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer. 9# * Redistributions in binary form must reproduce the above 10# copyright notice, this list of conditions and the following disclaimer 11# in the documentation and/or other materials provided with the 12# distribution. 13# * Neither the name of Google Inc. nor the names of its 14# contributors may be used to endorse or promote products derived from 15# this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29import os 30import tempfile 31 32 33class PrettyPatch(object): 34 def __init__(self, executive): 35 self._executive = executive 36 37 def pretty_diff_file(self, diff): 38 # Diffs can contain multiple text files of different encodings 39 # so we always deal with them as byte arrays, not unicode strings. 40 assert(isinstance(diff, str)) 41 pretty_diff = self.pretty_diff(diff) 42 diff_file = tempfile.NamedTemporaryFile(suffix=".html") 43 diff_file.write(pretty_diff) 44 diff_file.flush() 45 return diff_file 46 47 def pretty_diff(self, diff): 48 # pretify.rb will hang forever if given no input. 49 # Avoid the hang by returning an empty string. 50 if not diff: 51 return "" 52 53 pretty_patch_path = os.path.join(os.path.dirname(__file__), '..', '..', 54 'webkitruby', 'PrettyPatch') 55 prettify_path = os.path.join(pretty_patch_path, "prettify.rb") 56 args = [ 57 "ruby", 58 "-I", 59 pretty_patch_path, 60 prettify_path, 61 ] 62 # PrettyPatch does not modify the encoding of the diff output 63 # so we can't expect it to be utf-8. 64 return self._executive.run_command(args, input=diff, decode_output=False) 65