1
1
# Bazaar-NG -- distributed version control
3
3
# Copyright (C) 2005 by Canonical Ltd
5
5
# This program is free software; you can redistribute it and/or modify
6
6
# it under the terms of the GNU General Public License as published by
7
7
# the Free Software Foundation; either version 2 of the License, or
8
8
# (at your option) any later version.
10
10
# This program is distributed in the hope that it will be useful,
11
11
# but WITHOUT ANY WARRANTY; without even the implied warranty of
12
12
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
13
# GNU General Public License for more details.
15
15
# You should have received a copy of the GNU General Public License
16
16
# along with this program; if not, write to the Free Software
17
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
19
import os, types, re, time, errno, sys
20
from stat import S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE
22
from errors import bailout, BzrError
23
from trace import mutter
34
from bzrlib.errors import (BzrError,
35
BzrBadParameterNotUnicode,
39
from bzrlib.trace import mutter
42
26
def make_readonly(filename):
43
27
"""Make a filename read-only."""
28
# TODO: probably needs to be fixed for windows
44
29
mod = os.stat(filename).st_mode
45
30
mod = mod & 0777555
46
31
os.chmod(filename, mod)
102
70
raise BzrError('invalid file kind %r' % kind)
105
if hasattr(os.path, 'lexists'):
106
return os.path.lexists(f)
108
if hasattr(os, 'lstat'):
114
if e.errno == errno.ENOENT:
117
raise BzrError("lstat/stat of (%r): %r" % (f, e))
119
def fancy_rename(old, new, rename_func, unlink_func):
120
"""A fancy rename, when you don't have atomic rename.
122
:param old: The old path, to rename from
123
:param new: The new path, to rename to
124
:param rename_func: The potentially non-atomic rename function
125
:param unlink_func: A way to delete the target file if the full rename succeeds
128
# sftp rename doesn't allow overwriting, so play tricks:
130
base = os.path.basename(new)
131
dirname = os.path.dirname(new)
132
tmp_name = u'tmp.%s.%.9f.%d.%s' % (base, time.time(), os.getpid(), rand_chars(10))
133
tmp_name = pathjoin(dirname, tmp_name)
135
# Rename the file out of the way, but keep track if it didn't exist
136
# We don't want to grab just any exception
137
# something like EACCES should prevent us from continuing
138
# The downside is that the rename_func has to throw an exception
139
# with an errno = ENOENT, or NoSuchFile
142
rename_func(new, tmp_name)
143
except (NoSuchFile,), e:
146
# RBC 20060103 abstraction leakage: the paramiko SFTP clients rename
147
# function raises an IOError with errno == None when a rename fails.
148
# This then gets caught here.
149
if e.errno not in (None, errno.ENOENT, errno.ENOTDIR):
152
if (not hasattr(e, 'errno')
153
or e.errno not in (errno.ENOENT, errno.ENOTDIR)):
160
# This may throw an exception, in which case success will
162
rename_func(old, new)
166
# If the file used to exist, rename it back into place
167
# otherwise just delete it from the tmp location
169
unlink_func(tmp_name)
171
rename_func(tmp_name, new)
173
# Default is to just use the python builtins
174
abspath = os.path.abspath
175
realpath = os.path.realpath
176
pathjoin = os.path.join
177
normpath = os.path.normpath
179
mkdtemp = tempfile.mkdtemp
181
dirname = os.path.dirname
182
basename = os.path.basename
184
if os.name == "posix":
185
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
186
# choke on a Unicode string containing a relative path if
187
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
189
_fs_enc = sys.getfilesystemencoding()
191
return os.path.abspath(path.encode(_fs_enc)).decode(_fs_enc)
194
return os.path.realpath(path.encode(_fs_enc)).decode(_fs_enc)
196
if sys.platform == 'win32':
197
# We need to use the Unicode-aware os.path.abspath and
198
# os.path.realpath on Windows systems.
200
return os.path.abspath(path).replace('\\', '/')
203
return os.path.realpath(path).replace('\\', '/')
206
return os.path.join(*args).replace('\\', '/')
209
return os.path.normpath(path).replace('\\', '/')
212
return os.getcwdu().replace('\\', '/')
214
def mkdtemp(*args, **kwargs):
215
return tempfile.mkdtemp(*args, **kwargs).replace('\\', '/')
217
def rename(old, new):
218
fancy_rename(old, new, rename_func=os.rename, unlink_func=os.unlink)
221
def normalizepath(f):
222
if hasattr(os.path, 'realpath'):
226
[p,e] = os.path.split(f)
227
if e == "" or e == "." or e == "..":
230
return pathjoin(F(p), e)
234
"""Copy a file to a backup.
236
Backups are named in GNU-style, with a ~ suffix.
238
If the file is already a backup, it's not copied.
244
if has_symlinks() and os.path.islink(fn):
245
target = os.readlink(fn)
246
os.symlink(target, bfn)
254
outf = file(bfn, 'wb')
277
"""True if f is a symlink."""
279
return S_ISLNK(os.lstat(f)[ST_MODE])
283
91
def is_inside(dir, fname):
284
92
"""True if fname is inside dir.
286
The parameters should typically be passed to osutils.normpath first, so
287
that . and .. and repeated slashes are eliminated, and the separators
288
are canonical for the platform.
290
The empty string as a dir name is taken as top-of-tree and matches
293
>>> is_inside('src', pathjoin('src', 'foo.c'))
295
>>> is_inside('src', 'srccontrol')
297
>>> is_inside('src', pathjoin('src', 'a', 'a', 'a', 'foo.c'))
299
>>> is_inside('foo.c', 'foo.c')
301
>>> is_inside('foo.c', '')
303
>>> is_inside('', 'foo.c')
306
# XXX: Most callers of this can actually do something smarter by
307
# looking at the inventory
317
return fname.startswith(dir)
94
return os.path.commonprefix([dir, fname]) == dir
320
97
def is_inside_any(dir_list, fname):
321
98
"""True if fname is inside any of given dirs."""
99
# quick scan for perfect match
100
if fname in dir_list:
322
103
for dirname in dir_list:
323
104
if is_inside(dirname, fname):
380
152
'sha1': s.hexdigest()}
156
"""Return per-user configuration directory.
158
By default this is ~/.bzr.conf/
160
TODO: Global option --config-dir to override this.
162
return os.path.expanduser("~/.bzr.conf")
166
"""Calculate automatic user identification.
168
Returns (realname, email).
170
Only used when none is set in the environment or the id file.
172
This previously used the FQDN as the default domain, but that can
173
be very slow on machines where DNS is broken. So now we simply
178
# XXX: Any good way to get real user name on win32?
183
w = pwd.getpwuid(uid)
184
gecos = w.pw_gecos.decode(bzrlib.user_encoding)
185
username = w.pw_name.decode(bzrlib.user_encoding)
186
comma = gecos.find(',')
190
realname = gecos[:comma]
196
realname = username = getpass.getuser().decode(bzrlib.user_encoding)
198
return realname, (username + '@' + socket.gethostname())
202
"""Return the full user id from a file or environment variable.
204
TODO: Allow taking this from a file in the branch directory too
205
for per-branch ids."""
206
v = os.environ.get('BZREMAIL')
208
return v.decode(bzrlib.user_encoding)
211
return (open(os.path.join(config_dir(), "email"))
213
.decode(bzrlib.user_encoding)
216
if e.errno != errno.ENOENT:
219
v = os.environ.get('EMAIL')
221
return v.decode(bzrlib.user_encoding)
227
"""Return email-style username.
229
Something similar to 'Martin Pool <mbp@sourcefrog.net>'
231
TODO: Check it's reasonably well-formed.
237
name, email = _auto_user_id()
239
return '%s <%s>' % (name, email)
244
_EMAIL_RE = re.compile(r'[\w+.-]+@[\w+.-]+')
246
"""Return just the email component of a username."""
249
m = _EMAIL_RE.search(e)
251
bailout("%r doesn't seem to contain a reasonable email address" % e)
254
return _auto_user_id()[1]
383
258
def compare_files(a, b):
384
259
"""Returns true if equal in contents"""
421
296
tt = time.localtime(t)
422
297
offset = local_time_offset(t)
424
raise BzrError("unsupported timezone format %r" % timezone,
425
['options are "utc", "original", "local"'])
427
date_fmt = "%a %Y-%m-%d %H:%M:%S"
429
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
432
return (time.strftime(date_fmt, tt) + offset_str)
299
bailout("unsupported timezone format %r",
300
['options are "utc", "original", "local"'])
302
return (time.strftime("%a %Y-%m-%d %H:%M:%S", tt)
303
+ ' %+03d%02d' % (offset / 3600, (offset / 60) % 60))
435
306
def compact_date(when):
442
313
return os.fstat(f.fileno())[ST_SIZE]
445
# Define rand_bytes based on platform.
447
# Python 2.4 and later have os.urandom,
448
# but it doesn't work on some arches
316
if hasattr(os, 'urandom'): # python 2.4 and later
450
317
rand_bytes = os.urandom
451
except (NotImplementedError, AttributeError):
452
# If python doesn't have os.urandom, or it doesn't work,
453
# then try to first pull random data from /dev/urandom
454
if os.path.exists("/dev/urandom"):
455
rand_bytes = file('/dev/urandom', 'rb').read
456
# Otherwise, use this hack as a last resort
458
# not well seeded, but better than nothing
463
s += chr(random.randint(0, 255))
468
ALNUM = '0123456789abcdefghijklmnopqrstuvwxyz'
470
"""Return a random string of num alphanumeric characters
472
The result only contains lowercase chars because it may be used on
473
case-insensitive filesystems.
476
for raw_byte in rand_bytes(num):
477
s += ALNUM[ord(raw_byte) % 36]
318
elif sys.platform == 'linux2':
319
rand_bytes = file('/dev/urandom', 'rb').read
321
# not well seeded, but better than nothing
326
s += chr(random.randint(0, 255))
481
331
## TODO: We could later have path objects that remember their list
517
367
assert isinstance(p, list)
519
369
if (f == '..') or (f == None) or (f == ''):
520
raise BzrError("sorry, %r not allowed in path" % f)
370
bailout("sorry, %r not allowed in path" % f)
371
return os.path.join(*p)
524
374
def appendpath(p1, p2):
528
return pathjoin(p1, p2)
378
return os.path.join(p1, p2)
532
"""Split s into lines, but without removing the newline characters."""
533
return StringIO(s).readlines()
536
def hardlinks_good():
537
return sys.platform not in ('win32', 'cygwin', 'darwin')
540
def link_or_copy(src, dest):
541
"""Hardlink a file, or copy it if it can't be hardlinked."""
542
if not hardlinks_good():
547
except (OSError, IOError), e:
548
if e.errno != errno.EXDEV:
552
def delete_any(full_path):
553
"""Delete a file or directory."""
557
# We may be renaming a dangling inventory id
558
if e.errno not in (errno.EISDIR, errno.EACCES, errno.EPERM):
564
if hasattr(os, 'symlink'):
570
def contains_whitespace(s):
571
"""True if there are any whitespace characters in s."""
572
for ch in string.whitespace:
579
def contains_linebreaks(s):
580
"""True if there is any vertical whitespace in s."""
588
def relpath(base, path):
589
"""Return path relative to base, or raise exception.
591
The path may be either an absolute path or a path relative to the
592
current working directory.
594
os.path.commonprefix (python2.4) has a bad bug that it works just
595
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
598
if sys.platform != "win32":
602
assert len(base) >= minlength, ('Length of base must be equal or exceed the'
603
' platform minimum length (which is %d)' % minlength)
608
while len(head) >= len(base):
611
head, tail = os.path.split(head)
615
# XXX This should raise a NotChildPath exception, as its not tied
617
raise PathNotChild(rp, base)
625
def safe_unicode(unicode_or_utf8_string):
626
"""Coerce unicode_or_utf8_string into unicode.
628
If it is unicode, it is returned.
629
Otherwise it is decoded from utf-8. If a decoding error
630
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
631
as a BzrBadParameter exception.
633
if isinstance(unicode_or_utf8_string, unicode):
634
return unicode_or_utf8_string
636
return unicode_or_utf8_string.decode('utf8')
637
except UnicodeDecodeError:
638
raise BzrBadParameterNotUnicode(unicode_or_utf8_string)
641
def terminal_width():
642
"""Return estimated terminal width."""
644
# TODO: Do something smart on Windows?
646
# TODO: Is there anything that gets a better update when the window
647
# is resized while the program is running? We could use the Python termcap
650
return int(os.environ['COLUMNS'])
651
except (IndexError, KeyError, ValueError):
654
def supports_executable():
655
return sys.platform != "win32"
381
def extern_command(cmd, ignore_errors = False):
382
mutter('external command: %s' % `cmd`)
384
if not ignore_errors:
385
bailout('command failed')
added
removed
bzrlib/osutils.py
