25
27
from bzrlib.lazy_import import lazy_import
26
28
lazy_import(globals(), """
27
29
from datetime import datetime
29
from ntpath import (abspath as _nt_abspath,
31
normpath as _nt_normpath,
32
realpath as _nt_realpath,
33
splitdrive as _nt_splitdrive,
34
# We need to import both shutil and rmtree as we export the later on posix
35
# and need the former on windows
37
from shutil import rmtree
40
# We need to import both tempfile and mkdtemp as we export the later on posix
41
# and need the former on windows
43
from tempfile import (
43
from tempfile import mkdtemp
48
46
from bzrlib import (
53
from bzrlib.i18n import gettext
56
56
from bzrlib.symbol_versioning import (
110
102
mod = os.lstat(filename).st_mode
111
103
if not stat.S_ISLNK(mod):
112
104
mod = mod & 0777555
113
os.chmod(filename, mod)
105
chmod_if_possible(filename, mod)
116
108
def make_writable(filename):
117
109
mod = os.lstat(filename).st_mode
118
110
if not stat.S_ISLNK(mod):
120
os.chmod(filename, mod)
112
chmod_if_possible(filename, mod)
115
def chmod_if_possible(filename, mode):
116
# Set file mode if that can be safely done.
117
# Sometimes even on unix the filesystem won't allow it - see
118
# https://bugs.launchpad.net/bzr/+bug/606537
120
# It is probably faster to just do the chmod, rather than
121
# doing a stat, and then trying to compare
122
os.chmod(filename, mode)
123
except (IOError, OSError),e:
124
# Permission/access denied seems to commonly happen on smbfs; there's
125
# probably no point warning about it.
126
# <https://bugs.launchpad.net/bzr/+bug/606537>
127
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
128
trace.mutter("ignore error on chmod of %r: %r" % (
123
134
def minimum_path_selection(paths):
275
286
rename_func(tmp_name, new)
276
287
if failure_exc is not None:
277
raise failure_exc[0], failure_exc[1], failure_exc[2]
289
raise failure_exc[0], failure_exc[1], failure_exc[2]
280
294
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
281
295
# choke on a Unicode string containing a relative path if
282
296
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
285
298
def _posix_abspath(path):
286
299
# jam 20060426 rather than encoding to fsencoding
287
300
# copy posixpath.abspath, but use os.getcwdu instead
288
301
if not posixpath.isabs(path):
289
302
path = posixpath.join(getcwd(), path)
290
return posixpath.normpath(path)
303
return _posix_normpath(path)
293
306
def _posix_realpath(path):
294
307
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
310
def _posix_normpath(path):
311
path = posixpath.normpath(path)
312
# Bug 861008: posixpath.normpath() returns a path normalized according to
313
# the POSIX standard, which stipulates (for compatibility reasons) that two
314
# leading slashes must not be simplified to one, and only if there are 3 or
315
# more should they be simplified as one. So we treat the leading 2 slashes
316
# as a special case here by simply removing the first slash, as we consider
317
# that breaking POSIX compatibility for this obscure feature is acceptable.
318
# This is not a paranoid precaution, as we notably get paths like this when
319
# the repo is hosted at the root of the filesystem, i.e. in "/".
320
if path.startswith('//'):
325
def _posix_path_from_environ(key):
326
"""Get unicode path from `key` in environment or None if not present
328
Note that posix systems use arbitrary byte strings for filesystem objects,
329
so a path that raises BadFilenameEncoding here may still be accessible.
331
val = os.environ.get(key, None)
335
return val.decode(_fs_enc)
336
except UnicodeDecodeError:
337
# GZ 2011-12-12:Ideally want to include `key` in the exception message
338
raise errors.BadFilenameEncoding(val, _fs_enc)
341
def _posix_getuser_unicode():
342
"""Get username from environment or password database as unicode"""
343
name = getpass.getuser()
344
user_encoding = get_user_encoding()
346
return name.decode(user_encoding)
347
except UnicodeDecodeError:
348
raise errors.BzrError("Encoding of username %r is unsupported by %s "
349
"application locale." % (name, user_encoding))
297
352
def _win32_fixdrive(path):
298
353
"""Force drive letters to be consistent.
303
358
running python.exe under cmd.exe return capital C:\\
304
359
running win32 python inside a cygwin shell returns lowercase c:\\
306
drive, path = _nt_splitdrive(path)
361
drive, path = ntpath.splitdrive(path)
307
362
return drive.upper() + path
310
365
def _win32_abspath(path):
311
# Real _nt_abspath doesn't have a problem with a unicode cwd
312
return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
366
# Real ntpath.abspath doesn't have a problem with a unicode cwd
367
return _win32_fixdrive(ntpath.abspath(unicode(path)).replace('\\', '/'))
315
370
def _win98_abspath(path):
326
381
# /path => C:/path
327
382
path = unicode(path)
328
383
# check for absolute path
329
drive = _nt_splitdrive(path)[0]
384
drive = ntpath.splitdrive(path)[0]
330
385
if drive == '' and path[:2] not in('//','\\\\'):
331
386
cwd = os.getcwdu()
332
387
# we cannot simply os.path.join cwd and path
333
388
# because os.path.join('C:','/path') produce '/path'
334
389
# and this is incorrect
335
390
if path[:1] in ('/','\\'):
336
cwd = _nt_splitdrive(cwd)[0]
391
cwd = ntpath.splitdrive(cwd)[0]
338
393
path = cwd + '\\' + path
339
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
394
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
342
397
def _win32_realpath(path):
343
# Real _nt_realpath doesn't have a problem with a unicode cwd
344
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
398
# Real ntpath.realpath doesn't have a problem with a unicode cwd
399
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
347
402
def _win32_pathjoin(*args):
348
return _nt_join(*args).replace('\\', '/')
403
return ntpath.join(*args).replace('\\', '/')
351
406
def _win32_normpath(path):
352
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
407
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
355
410
def _win32_getcwd():
405
442
abspath = _posix_abspath
406
443
realpath = _posix_realpath
407
444
pathjoin = os.path.join
408
normpath = os.path.normpath
409
rename = _wrapped_rename # overridden below on win32
445
normpath = _posix_normpath
446
path_from_environ = _posix_path_from_environ
447
getuser_unicode = _posix_getuser_unicode
410
448
getcwd = os.getcwdu
411
450
dirname = os.path.dirname
412
451
basename = os.path.basename
413
452
split = os.path.split
414
453
splitext = os.path.splitext
415
# These were already imported into local scope
454
# These were already lazily imported into local scope
416
455
# mkdtemp = tempfile.mkdtemp
417
456
# rmtree = shutil.rmtree
419
464
MIN_ABS_PATHLENGTH = 1
477
534
input_encoding = getattr(sys.stdin, 'encoding', None)
478
535
if not input_encoding:
479
536
output_encoding = get_user_encoding()
480
mutter('encoding stdout as osutils.get_user_encoding() %r',
538
mutter('encoding stdout as osutils.get_user_encoding() %r',
483
541
output_encoding = input_encoding
484
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
543
mutter('encoding stdout as sys.stdin encoding %r',
486
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
547
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
487
548
if output_encoding == 'cp0':
488
549
# invalid encoding (cp0 means 'no codepage' on Windows)
489
550
output_encoding = get_user_encoding()
490
mutter('cp0 is invalid encoding.'
552
mutter('cp0 is invalid encoding.'
491
553
' encoding stdout as osutils.get_user_encoding() %r',
882
944
"""Return size of given open file."""
883
return os.fstat(f.fileno())[ST_SIZE]
886
# Define rand_bytes based on platform.
888
# Python 2.4 and later have os.urandom,
889
# but it doesn't work on some arches
891
rand_bytes = os.urandom
892
except (NotImplementedError, AttributeError):
893
# If python doesn't have os.urandom, or it doesn't work,
894
# then try to first pull random data from /dev/urandom
945
return os.fstat(f.fileno())[stat.ST_SIZE]
948
# Alias os.urandom to support platforms (which?) without /dev/urandom and
949
# override if it doesn't work. Avoid checking on windows where there is
950
# significant initialisation cost that can be avoided for some bzr calls.
952
rand_bytes = os.urandom
954
if rand_bytes.__module__ != "nt":
896
rand_bytes = file('/dev/urandom', 'rb').read
897
# Otherwise, use this hack as a last resort
898
except (IOError, OSError):
957
except NotImplementedError:
899
958
# not well seeded, but better than nothing
900
959
def rand_bytes(n):
1250
1307
# but for now, we haven't optimized...
1251
1308
return [canonical_relpath(base, p) for p in paths]
1311
def decode_filename(filename):
1312
"""Decode the filename using the filesystem encoding
1314
If it is unicode, it is returned.
1315
Otherwise it is decoded from the the filesystem's encoding. If decoding
1316
fails, a errors.BadFilenameEncoding exception is raised.
1318
if type(filename) is unicode:
1321
return filename.decode(_fs_enc)
1322
except UnicodeDecodeError:
1323
raise errors.BadFilenameEncoding(filename, _fs_enc)
1253
1326
def safe_unicode(unicode_or_utf8_string):
1254
1327
"""Coerce unicode_or_utf8_string into unicode.
1427
1506
- if BZR_COLUMNS is set, returns its value
1428
1507
- if there is no controlling terminal, returns None
1508
- query the OS, if the queried size has changed since the last query,
1429
1510
- if COLUMNS is set, returns its value,
1511
- if the OS has a value (even though it's never changed), return its value.
1431
1513
From there, we need to query the OS to get the size of the controlling
1516
On Unices we query the OS by:
1435
1517
- get termios.TIOCGWINSZ
1436
1518
- if an error occurs or a negative value is obtained, returns None
1520
On Windows we query the OS by:
1440
1521
- win32utils.get_console_size() decides,
1441
1522
- returns None on error (provided default value)
1524
# Note to implementors: if changing the rules for determining the width,
1525
# make sure you've considered the behaviour in these cases:
1526
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1527
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1529
# - (add more interesting cases here, if you find any)
1530
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1531
# but we don't want to register a signal handler because it is impossible
1532
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1533
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1534
# time so we can notice if the reported size has changed, which should have
1444
1537
# If BZR_COLUMNS is set, take it, user is always right
1538
# Except if they specified 0 in which case, impose no limit here
1446
return int(os.environ['BZR_COLUMNS'])
1540
width = int(os.environ['BZR_COLUMNS'])
1447
1541
except (KeyError, ValueError):
1543
if width is not None:
1450
1549
isatty = getattr(sys.stdout, 'isatty', None)
1451
if isatty is None or not isatty():
1550
if isatty is None or not isatty():
1452
1551
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1455
# If COLUMNS is set, take it, the terminal knows better (even inside a
1456
# given terminal, the application can decide to set COLUMNS to a lower
1457
# value (splitted screen) or a bigger value (scroll bars))
1555
width, height = os_size = _terminal_size(None, None)
1556
global _first_terminal_size, _terminal_size_state
1557
if _terminal_size_state == 'no_data':
1558
_first_terminal_size = os_size
1559
_terminal_size_state = 'unchanged'
1560
elif (_terminal_size_state == 'unchanged' and
1561
_first_terminal_size != os_size):
1562
_terminal_size_state = 'changed'
1564
# If the OS claims to know how wide the terminal is, and this value has
1565
# ever changed, use that.
1566
if _terminal_size_state == 'changed':
1567
if width is not None and width > 0:
1570
# If COLUMNS is set, use it.
1459
1572
return int(os.environ['COLUMNS'])
1460
1573
except (KeyError, ValueError):
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1576
# Finally, use an unchanged size from the OS, if we have one.
1577
if _terminal_size_state == 'unchanged':
1578
if width is not None and width > 0:
1581
# The width could not be determined.
1471
1585
def _win32_terminal_size(width, height):
1498
1612
_terminal_size = _ioctl_terminal_size
1501
def _terminal_size_changed(signum, frame):
1502
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1503
width, height = _terminal_size(None, None)
1504
if width is not None:
1505
os.environ['COLUMNS'] = str(width)
1508
_registered_sigwinch = False
1509
def watch_sigwinch():
1510
"""Register for SIGWINCH, once and only once.
1512
Do nothing if the signal module is not available.
1514
global _registered_sigwinch
1515
if not _registered_sigwinch:
1518
if getattr(signal, "SIGWINCH", None) is not None:
1519
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1521
# python doesn't provide signal support, nothing we can do about it
1523
_registered_sigwinch = True
1526
1615
def supports_executable():
1527
1616
return sys.platform != "win32"
1959
2049
return user_encoding
2052
def get_diff_header_encoding():
2053
return get_terminal_encoding()
2056
_message_encoding = None
2059
def get_message_encoding():
2060
"""Return the encoding used for messages
2062
While the message encoding is a general setting it should usually only be
2063
needed for decoding system error strings such as from OSError instances.
2065
global _message_encoding
2066
if _message_encoding is None:
2067
if os.name == "posix":
2069
# This is a process-global setting that can change, but should in
2070
# general just get set once at process startup then be constant.
2071
_message_encoding = locale.getlocale(locale.LC_MESSAGES)[1]
2073
# On windows want the result of GetACP() which this boils down to.
2074
_message_encoding = get_user_encoding()
2075
return _message_encoding or "ascii"
1962
2078
def get_host_name():
1963
2079
"""Return the current unicode host name.
2051
2174
report_activity(sent, 'write')
2177
def connect_socket(address):
2178
# Slight variation of the socket.create_connection() function (provided by
2179
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2180
# provide it for previous python versions. Also, we don't use the timeout
2181
# parameter (provided by the python implementation) so we don't implement
2183
err = socket.error('getaddrinfo returns an empty list')
2184
host, port = address
2185
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2186
af, socktype, proto, canonname, sa = res
2189
sock = socket.socket(af, socktype, proto)
2193
except socket.error, err:
2194
# 'err' is now the most recent error
2195
if sock is not None:
2054
2200
def dereference_path(path):
2055
2201
"""Determine the real path to a file.
2114
2262
return file_kind_from_stat_mode(mode)
2115
2263
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2118
def file_kind(f, _lstat=os.lstat):
2265
def file_stat(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2121
2269
except OSError, e:
2122
2270
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2123
2271
raise errors.NoSuchFile(f)
2274
def file_kind(f, _lstat=os.lstat):
2275
stat_value = file_stat(f, _lstat)
2276
return file_kind_from_stat_mode(stat_value.st_mode)
2127
2278
def until_no_eintr(f, *a, **kw):
2128
2279
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
2281
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
2282
if EINTR does occur. This is typically only true for low-level operations
2132
2283
like os.read. If in any doubt, don't use this.
2187
2339
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2191
if sys.platform == 'linux2':
2342
if sys.platform.startswith('linux'):
2192
2343
def _local_concurrency():
2194
prefix = 'processor'
2195
for line in file('/proc/cpuinfo', 'rb'):
2196
if line.startswith(prefix):
2197
concurrency = int(line[line.find(':')+1:]) + 1
2345
return os.sysconf('SC_NPROCESSORS_ONLN')
2346
except (ValueError, OSError, AttributeError):
2199
2348
elif sys.platform == 'darwin':
2200
2349
def _local_concurrency():
2201
2350
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2202
2351
stdout=subprocess.PIPE).communicate()[0]
2203
elif sys.platform[0:7] == 'freebsd':
2352
elif "bsd" in sys.platform:
2204
2353
def _local_concurrency():
2205
2354
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2206
2355
stdout=subprocess.PIPE).communicate()[0]
2234
2383
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2235
2384
if concurrency is None:
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
2386
import multiprocessing
2387
concurrency = multiprocessing.cpu_count()
2388
except (ImportError, NotImplementedError):
2389
# multiprocessing is only available on Python >= 2.6
2390
# and multiprocessing.cpu_count() isn't implemented on all
2393
concurrency = _local_concurrency()
2394
except (OSError, IOError):
2241
2397
concurrency = int(concurrency)
2242
2398
except (TypeError, ValueError):
2302
2458
return os.fdopen(os.open(filename, flags), mode, bufsize)
2304
2460
open_file = open
2463
def available_backup_name(base, exists):
2464
"""Find a non-existing backup file name.
2466
This will *not* create anything, this only return a 'free' entry. This
2467
should be used for checking names in a directory below a locked
2468
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2469
Leap) and generally discouraged.
2471
:param base: The base name.
2473
:param exists: A callable returning True if the path parameter exists.
2476
name = "%s.~%d~" % (base, counter)
2479
name = "%s.~%d~" % (base, counter)
2483
def set_fd_cloexec(fd):
2484
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2485
support for this is not available.
2489
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2490
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2491
except (ImportError, AttributeError):
2492
# Either the fcntl module or specific constants are not present
2496
def find_executable_on_path(name):
2497
"""Finds an executable on the PATH.
2499
On Windows, this will try to append each extension in the PATHEXT
2500
environment variable to the name, if it cannot be found with the name
2503
:param name: The base name of the executable.
2504
:return: The path to the executable found or None.
2506
path = os.environ.get('PATH')
2509
path = path.split(os.pathsep)
2510
if sys.platform == 'win32':
2511
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2512
exts = [ext.lower() for ext in exts]
2513
base, ext = os.path.splitext(name)
2515
if ext.lower() not in exts:
2523
f = os.path.join(d, name) + ext
2524
if os.access(f, os.X_OK):
2529
def _posix_is_local_pid_dead(pid):
2530
"""True if pid doesn't correspond to live process on this machine"""
2532
# Special meaning of unix kill: just check if it's there.
2535
if e.errno == errno.ESRCH:
2536
# On this machine, and really not found: as sure as we can be
2539
elif e.errno == errno.EPERM:
2540
# exists, though not ours
2543
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2544
# Don't really know.
2547
# Exists and our process: not dead.
2550
if sys.platform == "win32":
2551
is_local_pid_dead = win32utils.is_local_pid_dead
2553
is_local_pid_dead = _posix_is_local_pid_dead
2556
def fdatasync(fileno):
2557
"""Flush file contents to disk if possible.
2559
:param fileno: Integer OS file handle.
2560
:raises TransportNotPossible: If flushing to disk is not possible.
2562
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2567
def ensure_empty_directory_exists(path, exception_class):
2568
"""Make sure a local directory exists and is empty.
2570
If it does not exist, it is created. If it exists and is not empty, an
2571
instance of exception_class is raised.
2576
if e.errno != errno.EEXIST:
2578
if os.listdir(path) != []:
2579
raise exception_class(path)
2582
def is_environment_error(evalue):
2583
"""True if exception instance is due to a process environment issue
2585
This includes OSError and IOError, but also other errors that come from
2586
the operating system or core libraries but are not subclasses of those.
2588
if isinstance(evalue, (EnvironmentError, select.error)):
2590
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):