/usr/lib/python3/dist-packages/paste/debug/fsdiff.py is in python3-paste 2.0.3+dfsg-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 | # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org)
# Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
"""
Module to find differences over time in a filesystem
Basically this takes a snapshot of a directory, then sees what changes
were made. The contents of the files are not checked, so you can
detect that the content was changed, but not what the old version of
the file was.
"""
import os
from fnmatch import fnmatch
from datetime import datetime
try:
# Python 3
import collections.UserDict as IterableUserDict
except ImportError:
# Python 2.5-2.7
from UserDict import IterableUserDict
import operator
import re
__all__ = ['Diff', 'Snapshot', 'File', 'Dir', 'report_expected_diffs',
'show_diff']
class Diff(object):
"""
Represents the difference between two snapshots
"""
def __init__(self, before, after):
self.before = before
self.after = after
self._calculate()
def _calculate(self):
before = self.before.data
after = self.after.data
self.deleted = {}
self.updated = {}
self.created = after.copy()
for path, f in before.items():
if path not in after:
self.deleted[path] = f
continue
del self.created[path]
if f.mtime < after[path].mtime:
self.updated[path] = after[path]
def __str__(self):
return self.report()
def report(self, header=True, dates=False):
s = []
if header:
s.append('Difference in %s from %s to %s:' %
(self.before.base_path,
self.before.calculated,
self.after.calculated))
for name, files, show_size in [
('created', self.created, True),
('deleted', self.deleted, True),
('updated', self.updated, True)]:
if files:
s.append('-- %s: -------------------' % name)
files = files.items()
files.sort()
last = ''
for path, f in files:
t = ' %s' % _space_prefix(last, path, indent=4,
include_sep=False)
last = path
if show_size and f.size != 'N/A':
t += ' (%s bytes)' % f.size
if dates:
parts = []
if self.before.get(path):
parts.append(self.before[path].mtime)
if self.after.get(path):
parts.append(self.after[path].mtime)
t += ' (mtime: %s)' % ('->'.join(map(repr, parts)))
s.append(t)
if len(s) == 1:
s.append(' (no changes)')
return '\n'.join(s)
class Snapshot(IterableUserDict):
"""
Represents a snapshot of a set of files. Has a dictionary-like
interface, keyed relative to ``base_path``
"""
def __init__(self, base_path, files=None, ignore_wildcards=(),
ignore_paths=(), ignore_hidden=True):
self.base_path = base_path
self.ignore_wildcards = ignore_wildcards
self.ignore_hidden = ignore_hidden
self.ignore_paths = ignore_paths
self.calculated = None
self.data = files or {}
if files is None:
self.find_files()
############################################################
## File finding
############################################################
def find_files(self):
"""
Find all the files under the base path, and put them in
``self.data``
"""
self._find_traverse('', self.data)
self.calculated = datetime.now()
def _ignore_file(self, fn):
if fn in self.ignore_paths:
return True
if self.ignore_hidden and os.path.basename(fn).startswith('.'):
return True
for pat in self.ignore_wildcards:
if fnmatch(fn, pat):
return True
return False
def _find_traverse(self, path, result):
full = os.path.join(self.base_path, path)
if os.path.isdir(full):
if path:
# Don't actually include the base path
result[path] = Dir(self.base_path, path)
for fn in os.listdir(full):
fn = os.path.join(path, fn)
if self._ignore_file(fn):
continue
self._find_traverse(fn, result)
else:
result[path] = File(self.base_path, path)
def __repr__(self):
return '<%s in %r from %r>' % (
self.__class__.__name__, self.base_path,
self.calculated or '(no calculation done)')
def compare_expected(self, expected, comparison=operator.eq,
differ=None, not_found=None,
include_success=False):
"""
Compares a dictionary of ``path: content`` to the
found files. Comparison is done by equality, or the
``comparison(actual_content, expected_content)`` function given.
Returns dictionary of differences, keyed by path. Each
difference is either noted, or the output of
``differ(actual_content, expected_content)`` is given.
If a file does not exist and ``not_found`` is given, then
``not_found(path)`` is put in.
"""
result = {}
for path in expected:
orig_path = path
path = path.strip('/')
if path not in self.data:
if not_found:
msg = not_found(path)
else:
msg = 'not found'
result[path] = msg
continue
expected_content = expected[orig_path]
file = self.data[path]
actual_content = file.bytes
if not comparison(actual_content, expected_content):
if differ:
msg = differ(actual_content, expected_content)
else:
if len(actual_content) < len(expected_content):
msg = 'differ (%i bytes smaller)' % (
len(expected_content) - len(actual_content))
elif len(actual_content) > len(expected_content):
msg = 'differ (%i bytes larger)' % (
len(actual_content) - len(expected_content))
else:
msg = 'diff (same size)'
result[path] = msg
elif include_success:
result[path] = 'same!'
return result
def diff_to_now(self):
return Diff(self, self.clone())
def clone(self):
return self.__class__(base_path=self.base_path,
ignore_wildcards=self.ignore_wildcards,
ignore_paths=self.ignore_paths,
ignore_hidden=self.ignore_hidden)
class File(object):
"""
Represents a single file found as the result of a command.
Has attributes:
``path``:
The path of the file, relative to the ``base_path``
``full``:
The full path
``stat``:
The results of ``os.stat``. Also ``mtime`` and ``size``
contain the ``.st_mtime`` and ``st_size`` of the stat.
``bytes``:
The contents of the file.
You may use the ``in`` operator with these objects (tested against
the contents of the file), and the ``.mustcontain()`` method.
"""
file = True
dir = False
def __init__(self, base_path, path):
self.base_path = base_path
self.path = path
self.full = os.path.join(base_path, path)
self.stat = os.stat(self.full)
self.mtime = self.stat.st_mtime
self.size = self.stat.st_size
self._bytes = None
def bytes__get(self):
if self._bytes is None:
f = open(self.full, 'rb')
self._bytes = f.read()
f.close()
return self._bytes
bytes = property(bytes__get)
def __contains__(self, s):
return s in self.bytes
def mustcontain(self, s):
__tracebackhide__ = True
bytes = self.bytes
if s not in bytes:
print('Could not find %r in:' % s)
print(bytes)
assert s in bytes
def __repr__(self):
return '<%s %s:%s>' % (
self.__class__.__name__,
self.base_path, self.path)
class Dir(File):
"""
Represents a directory created by a command.
"""
file = False
dir = True
def __init__(self, base_path, path):
self.base_path = base_path
self.path = path
self.full = os.path.join(base_path, path)
self.size = 'N/A'
self.mtime = 'N/A'
def __repr__(self):
return '<%s %s:%s>' % (
self.__class__.__name__,
self.base_path, self.path)
def bytes__get(self):
raise NotImplementedError(
"Directory %r doesn't have content" % self)
bytes = property(bytes__get)
def _space_prefix(pref, full, sep=None, indent=None, include_sep=True):
"""
Anything shared by pref and full will be replaced with spaces
in full, and full returned.
Example::
>>> _space_prefix('/foo/bar', '/foo')
' /bar'
"""
if sep is None:
sep = os.path.sep
pref = pref.split(sep)
full = full.split(sep)
padding = []
while pref and full and pref[0] == full[0]:
if indent is None:
padding.append(' ' * (len(full[0]) + len(sep)))
else:
padding.append(' ' * indent)
full.pop(0)
pref.pop(0)
if padding:
if include_sep:
return ''.join(padding) + sep + sep.join(full)
else:
return ''.join(padding) + sep.join(full)
else:
return sep.join(full)
def report_expected_diffs(diffs, colorize=False):
"""
Takes the output of compare_expected, and returns a string
description of the differences.
"""
if not diffs:
return 'No differences'
diffs = diffs.items()
diffs.sort()
s = []
last = ''
for path, desc in diffs:
t = _space_prefix(last, path, indent=4, include_sep=False)
if colorize:
t = color_line(t, 11)
last = path
if len(desc.splitlines()) > 1:
cur_indent = len(re.search(r'^[ ]*', t).group(0))
desc = indent(cur_indent+2, desc)
if colorize:
t += '\n'
for line in desc.splitlines():
if line.strip().startswith('+'):
line = color_line(line, 10)
elif line.strip().startswith('-'):
line = color_line(line, 9)
else:
line = color_line(line, 14)
t += line+'\n'
else:
t += '\n' + desc
else:
t += ' '+desc
s.append(t)
s.append('Files with differences: %s' % len(diffs))
return '\n'.join(s)
def color_code(foreground=None, background=None):
"""
0 black
1 red
2 green
3 yellow
4 blue
5 magenta (purple)
6 cyan
7 white (gray)
Add 8 to get high-intensity
"""
if foreground is None and background is None:
# Reset
return '\x1b[0m'
codes = []
if foreground is None:
codes.append('[39m')
elif foreground > 7:
codes.append('[1m')
codes.append('[%im' % (22+foreground))
else:
codes.append('[%im' % (30+foreground))
if background is None:
codes.append('[49m')
else:
codes.append('[%im' % (40+background))
return '\x1b' + '\x1b'.join(codes)
def color_line(line, foreground=None, background=None):
match = re.search(r'^(\s*)', line)
return (match.group(1) + color_code(foreground, background)
+ line[match.end():] + color_code())
def indent(indent, text):
return '\n'.join(
[' '*indent + l for l in text.splitlines()])
def show_diff(actual_content, expected_content):
actual_lines = [l.strip() for l in actual_content.splitlines()
if l.strip()]
expected_lines = [l.strip() for l in expected_content.splitlines()
if l.strip()]
if len(actual_lines) == len(expected_lines) == 1:
return '%r not %r' % (actual_lines[0], expected_lines[0])
if not actual_lines:
return 'Empty; should have:\n'+expected_content
import difflib
return '\n'.join(difflib.ndiff(actual_lines, expected_lines))
|