1
# Bazaar-NG -- distributed version control
3
# Copyright (C) 2005 by Canonical Ltd
5
# This program is free software; you can redistribute it and/or modify
6
# it under the terms of the GNU General Public License as published by
7
# the Free Software Foundation; either version 2 of the License, or
8
# (at your option) any later version.
10
# This program is distributed in the hope that it will be useful,
11
# but WITHOUT ANY WARRANTY; without even the implied warranty of
12
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
# GNU General Public License for more details.
15
# You should have received a copy of the GNU General Public License
16
# along with this program; if not, write to the Free Software
17
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
from shutil import copyfile
20
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
21
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
22
from cStringIO import StringIO
33
from bzrlib.errors import BzrError, NotBranchError
34
from bzrlib.trace import mutter
37
def make_readonly(filename):
38
"""Make a filename read-only."""
39
mod = os.stat(filename).st_mode
41
os.chmod(filename, mod)
44
def make_writable(filename):
45
mod = os.stat(filename).st_mode
47
os.chmod(filename, mod)
54
"""Return a quoted filename filename
56
This previously used backslash quoting, but that works poorly on
58
# TODO: I'm not really sure this is the best format either.x
61
_QUOTE_RE = re.compile(r'([^a-zA-Z0-9.,:/\\_~-])')
63
if _QUOTE_RE.search(f):
70
mode = os.lstat(f)[ST_MODE]
89
def kind_marker(kind):
92
elif kind == 'directory':
94
elif kind == 'symlink':
97
raise BzrError('invalid file kind %r' % kind)
100
if hasattr(os.path, 'lexists'):
101
return os.path.lexists(f)
103
if hasattr(os, 'lstat'):
109
if e.errno == errno.ENOENT:
112
raise BzrError("lstat/stat of (%r): %r" % (f, e))
114
if os.name == "posix":
115
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
116
# choke on a Unicode string containing a relative path if
117
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
119
_fs_enc = sys.getfilesystemencoding()
121
return os.path.abspath(path.encode(_fs_enc)).decode(_fs_enc)
123
return os.path.realpath(path.encode(_fs_enc)).decode(_fs_enc)
124
pathjoin = os.path.join
126
# We need to use the Unicode-aware os.path.abspath and
127
# os.path.realpath on Windows systems.
129
return os.path.abspath(path).replace('\\', '/')
131
return os.path.realpath(path).replace('\\', '/')
133
return os.path.join(*args).replace('\\', '/')
134
# Because these shrink the path, we can use the original
135
# versions on any platform
136
dirname = os.path.dirname
137
basename = os.path.basename
139
def normalizepath(f):
140
if hasattr(os.path, 'realpath'):
144
[p,e] = os.path.split(f)
145
if e == "" or e == "." or e == "..":
148
return pathjoin(F(p), e)
152
"""Copy a file to a backup.
154
Backups are named in GNU-style, with a ~ suffix.
156
If the file is already a backup, it's not copied.
162
if has_symlinks() and os.path.islink(fn):
163
target = os.readlink(fn)
164
os.symlink(target, bfn)
172
outf = file(bfn, 'wb')
186
"""True if f is an accessible directory."""
188
return S_ISDIR(os.lstat(f)[ST_MODE])
194
"""True if f is a regular file."""
196
return S_ISREG(os.lstat(f)[ST_MODE])
201
"""True if f is a symlink."""
203
return S_ISLNK(os.lstat(f)[ST_MODE])
207
def is_inside(dir, fname):
208
"""True if fname is inside dir.
210
The parameters should typically be passed to os.path.normpath first, so
211
that . and .. and repeated slashes are eliminated, and the separators
212
are canonical for the platform.
214
The empty string as a dir name is taken as top-of-tree and matches
217
>>> is_inside('src', pathjoin('src', 'foo.c'))
219
>>> is_inside('src', 'srccontrol')
221
>>> is_inside('src', pathjoin('src', 'a', 'a', 'a', 'foo.c'))
223
>>> is_inside('foo.c', 'foo.c')
225
>>> is_inside('foo.c', '')
227
>>> is_inside('', 'foo.c')
230
# XXX: Most callers of this can actually do something smarter by
231
# looking at the inventory
241
return fname.startswith(dir)
244
def is_inside_any(dir_list, fname):
245
"""True if fname is inside any of given dirs."""
246
for dirname in dir_list:
247
if is_inside(dirname, fname):
253
def pumpfile(fromfile, tofile):
254
"""Copy contents of one file to another."""
257
b = fromfile.read(BUFSIZE)
264
if hasattr(f, 'tell'):
277
def sha_strings(strings):
278
"""Return the sha-1 of concatenation of strings"""
280
map(s.update, strings)
290
def fingerprint_file(f):
295
return {'size': size,
296
'sha1': s.hexdigest()}
299
def compare_files(a, b):
300
"""Returns true if equal in contents"""
311
def local_time_offset(t=None):
312
"""Return offset of local zone from GMT, either at present or at time t."""
313
# python2.3 localtime() can't take None
317
if time.localtime(t).tm_isdst and time.daylight:
320
return -time.timezone
323
def format_date(t, offset=0, timezone='original', date_fmt=None,
325
## TODO: Perhaps a global option to use either universal or local time?
326
## Or perhaps just let people set $TZ?
327
assert isinstance(t, float)
329
if timezone == 'utc':
332
elif timezone == 'original':
335
tt = time.gmtime(t + offset)
336
elif timezone == 'local':
337
tt = time.localtime(t)
338
offset = local_time_offset(t)
340
raise BzrError("unsupported timezone format %r" % timezone,
341
['options are "utc", "original", "local"'])
343
date_fmt = "%a %Y-%m-%d %H:%M:%S"
345
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
348
return (time.strftime(date_fmt, tt) + offset_str)
351
def compact_date(when):
352
return time.strftime('%Y%m%d%H%M%S', time.gmtime(when))
357
"""Return size of given open file."""
358
return os.fstat(f.fileno())[ST_SIZE]
360
# Define rand_bytes based on platform.
362
# Python 2.4 and later have os.urandom,
363
# but it doesn't work on some arches
365
rand_bytes = os.urandom
366
except (NotImplementedError, AttributeError):
367
# If python doesn't have os.urandom, or it doesn't work,
368
# then try to first pull random data from /dev/urandom
369
if os.path.exists("/dev/urandom"):
370
rand_bytes = file('/dev/urandom', 'rb').read
371
# Otherwise, use this hack as a last resort
373
# not well seeded, but better than nothing
378
s += chr(random.randint(0, 255))
382
## TODO: We could later have path objects that remember their list
383
## decomposition (might be too tricksy though.)
386
"""Turn string into list of parts.
392
>>> splitpath('a/./b')
394
>>> splitpath('a/.b')
396
>>> splitpath('a/../b')
397
Traceback (most recent call last):
399
BzrError: sorry, '..' not allowed in path
401
assert isinstance(p, types.StringTypes)
403
# split on either delimiter because people might use either on
405
ps = re.split(r'[\\/]', p)
410
raise BzrError("sorry, %r not allowed in path" % f)
411
elif (f == '.') or (f == ''):
418
assert isinstance(p, list)
420
if (f == '..') or (f == None) or (f == ''):
421
raise BzrError("sorry, %r not allowed in path" % f)
425
def appendpath(p1, p2):
429
return pathjoin(p1, p2)
433
"""Split s into lines, but without removing the newline characters."""
434
return StringIO(s).readlines()
437
def hardlinks_good():
438
return sys.platform not in ('win32', 'cygwin', 'darwin')
441
def link_or_copy(src, dest):
442
"""Hardlink a file, or copy it if it can't be hardlinked."""
443
if not hardlinks_good():
448
except (OSError, IOError), e:
449
if e.errno != errno.EXDEV:
455
if hasattr(os, 'symlink'):
461
def contains_whitespace(s):
462
"""True if there are any whitespace characters in s."""
463
for ch in string.whitespace:
470
def contains_linebreaks(s):
471
"""True if there is any vertical whitespace in s."""
479
def relpath(base, path):
480
"""Return path relative to base, or raise exception.
482
The path may be either an absolute path or a path relative to the
483
current working directory.
485
os.path.commonprefix (python2.4) has a bad bug that it works just
486
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
487
avoids that problem."""
492
while len(head) >= len(base):
495
head, tail = os.path.split(head)
499
# XXX This should raise a NotChildPath exception, as its not tied
501
raise NotBranchError("path %r is not within branch %r" % (rp, base))
510
def terminal_width():
511
"""Return estimated terminal width."""
513
# TODO: Do something smart on Windows?
515
# TODO: Is there anything that gets a better update when the window
516
# is resized while the program is running? We could use the Python termcap
519
return int(os.environ['COLUMNS'])
520
except (IndexError, KeyError, ValueError):