/usr/lib/python2.7/dist-packages/svnmailer/differ.py is in svnmailer 1.0.9-2.
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#
# Copyright 2004-2006 André Malo or his licensors, as applicable
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Differ classes
"""
__author__ = "André Malo"
__docformat__ = "epytext en"
__all__ = ["InternalDiffer", "ExternalDiffer"]
class InternalDiffer(object):
""" Differ without an external program call (uses difflib) """
def __init__(self):
""" Initialization """
pass
def getStringDiff(self, string1, string2, label1, label2 = None,
date1 = "", date2 = ""):
""" creates a diff of two line based strings
If a string is C{None}, it's treated as ""
@param string1: First string
@type string1: C{str}
@param string2: Second string
@type string2: C{str}
@param label1: Label for first data
@type label1: C{str}
@param label2: Label for second data
@type label2: C{str}
@param date1: Date description for first data
@type date1: C{str}
@param date2: Date description for second data
@type date2: C{str}
@return: unified diff lines (maybe a generator)
@rtype: iterable
"""
import difflib
list1 = (string1 or "").splitlines(True)
list2 = (string2 or "").splitlines(True)
if not (list1 or list2):
list1 = list2 = [""]
return difflib.unified_diff(
list1, list2, label1, label2 or label1, date1, date2,
)
def getFileDiff(self, name1, name2, label1, label2 = None,
date1 = "", date2 = ""):
""" creates a diff of two line based files
@param name1: First file name
@type name1: C{str}
@param name2: Second file name
@type name2: C{str}
@param label1: Label for first data
@type label1: C{str}
@param label2: Label for second data
@type label2: C{str}
@param date1: Date description for first data
@type date1: C{str}
@param date2: Date description for second data
@type date2: C{str}
@return: unified diff lines (maybe a generator)
@rtype: iterable
"""
import difflib
list1 = file(name1, "rb").readlines()
list2 = file(name2, "rb").readlines()
if not (list1 or list2):
list1 = list2 = [""]
return difflib.unified_diff(
list1, list2, label1, label2 or label1, date1, date2,
)
class ExternalDiffer(object):
""" Differ which calls an external program (e.g. diff)
@ivar _diff_command: The diff command line
@type _diff_command: C{list}
@ivar _tempdir: The tempdir to use for string diffs
@type _tempdir: C{str}
"""
def __init__(self, diff_command, tempdir = None):
""" Initialization
@param diff_command: The diff command to call
@type diff_command: C{list}
@param tempdir: The tempdir to use for string diffs
@type tempdir: C{str}
"""
self._diff_command = diff_command
self._tempdir = tempdir
def getStringDiff(self, string1, string2, label1, label2 = None,
date1 = "", date2 = ""):
""" creates a diff of two line based strings
If a string is C{None}, it's treated as ""
@param string1: First string
@type string1: C{str}
@param string2: Second string
@type string2: C{str}
@param label1: Label for first data
@type label1: C{str}
@param label2: Label for second data
@type label2: C{str}
@param date1: Date description for first data
@type date1: C{str}
@param date2: Date description for second data
@type date2: C{str}
@return: unified diff lines (maybe a generator)
@rtype: iterable
"""
from svnmailer import util
string1 = string1 or ""
string2 = string2 or ""
file1 = util.TempFile(self._tempdir)
file1.fp.write(string1)
file1.close()
file2 = util.TempFile(self._tempdir)
file2.fp.write(string2)
file2.close()
pipe = self._getPipe(
file1.name, file2.name, label1, label2, date1, date2
)
# yield line by line
line = pipe.fromchild.readline()
while line:
yield line
line = pipe.fromchild.readline()
pipe.fromchild.close()
pipe.wait()
def getFileDiff(self, name1, name2, label1, label2 = None,
date1 = "", date2 = ""):
""" creates a diff of two line based files
@param name1: First file name
@type name1: C{str}
@param name2: Second file name
@type name2: C{str}
@param label1: Label for first data
@type label1: C{str}
@param label2: Label for second data
@type label2: C{str}
@param date1: Date description for first data
@type date1: C{str}
@param date2: Date description for second data
@type date2: C{str}
@return: unified diff lines (maybe a generator)
@rtype: iterable
"""
pipe = self._getPipe(name1, name2, label1, label2, date1, date2)
# yield line by line
line = pipe.fromchild.readline()
while line:
yield line
line = pipe.fromchild.readline()
pipe.fromchild.close()
pipe.wait()
def _getPipe(self, name1, name2, label1, label2, date1, date2):
""" Returns a pipe from the diff program
@param name1: First file name
@type name1: C{str}
@param name2: Second file name
@type name2: C{str}
@param label1: Label for first data
@type label1: C{str}
@param label2: Label for second data
@type label2: C{str}
@param date1: Date description for first data
@type date1: C{str}
@param date2: Date description for second data
@type date2: C{str}
@return: The pipe object
@rtype: see: C{util.getPipe4}
"""
from svnmailer import util
params = {
"label_from": "%s %s" % (label1, date1 or ""),
"label_to" : "%s %s" % (label2 or label1, date2 or ""),
"from" : name1,
"to" : name2,
}
# check for sanity
for key, value in params.items():
if isinstance(value, unicode):
params[key] = value.encode("utf-8")
cmd = list(self._diff_command)
cmd[1:] = [(isinstance(arg, unicode) and
[arg.encode("utf-8")] or [arg])[0] % params for arg in cmd[1:]
]
pipe = util.getPipe4(cmd)
pipe.tochild.close()
return pipe
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