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
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from bzrlib import (
53
from bzrlib.i18n import gettext
56
56
from bzrlib.symbol_versioning import (
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mod = os.lstat(filename).st_mode
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103
if not stat.S_ISLNK(mod):
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mod = mod & 0777555
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os.chmod(filename, mod)
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chmod_if_possible(filename, mod)
116
108
def make_writable(filename):
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109
mod = os.lstat(filename).st_mode
118
110
if not stat.S_ISLNK(mod):
120
os.chmod(filename, mod)
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chmod_if_possible(filename, mod)
115
def chmod_if_possible(filename, mode):
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# Set file mode if that can be safely done.
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# 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):
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286
rename_func(tmp_name, new)
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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
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# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
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295
# choke on a Unicode string containing a relative path if
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# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
284
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
285
298
def _posix_abspath(path):
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# jam 20060426 rather than encoding to fsencoding
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# copy posixpath.abspath, but use os.getcwdu instead
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if not posixpath.isabs(path):
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path = posixpath.join(getcwd(), path)
290
return posixpath.normpath(path)
303
return _posix_normpath(path)
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def _posix_realpath(path):
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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
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# more should they be simplified as one. So we treat the leading 2 slashes
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# as a special case here by simply removing the first slash, as we consider
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# that breaking POSIX compatibility for this obscure feature is acceptable.
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# This is not a paranoid precaution, as we notably get paths like this when
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# the repo is hosted at the root of the filesystem, i.e. in "/".
320
if path.startswith('//'):
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def _posix_path_from_environ(key):
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"""Get unicode path from `key` in environment or None if not present
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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()
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user_encoding = get_user_encoding()
346
return name.decode(user_encoding)
347
except UnicodeDecodeError:
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raise errors.BzrError("Encoding of username %r is unsupported by %s "
349
"application locale." % (name, user_encoding))
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352
def _win32_fixdrive(path):
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"""Force drive letters to be consistent.
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running python.exe under cmd.exe return capital C:\\
304
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running win32 python inside a cygwin shell returns lowercase c:\\
306
drive, path = _nt_splitdrive(path)
361
drive, path = ntpath.splitdrive(path)
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return drive.upper() + path
310
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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('\\', '/'))
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# Real ntpath.abspath doesn't have a problem with a unicode cwd
367
return _win32_fixdrive(ntpath.abspath(unicode(path)).replace('\\', '/'))
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def _win98_abspath(path):
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# /path => C:/path
327
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path = unicode(path)
328
383
# check for absolute path
329
drive = _nt_splitdrive(path)[0]
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drive = ntpath.splitdrive(path)[0]
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if drive == '' and path[:2] not in('//','\\\\'):
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cwd = os.getcwdu()
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# we cannot simply os.path.join cwd and path
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# because os.path.join('C:','/path') produce '/path'
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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
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realpath = _posix_realpath
407
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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
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448
getcwd = os.getcwdu
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450
dirname = os.path.dirname
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basename = os.path.basename
413
452
split = os.path.split
414
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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
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# rmtree = shutil.rmtree
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464
MIN_ABS_PATHLENGTH = 1
477
534
input_encoding = getattr(sys.stdin, 'encoding', None)
478
535
if not input_encoding:
479
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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':
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549
# invalid encoding (cp0 means 'no codepage' on Windows)
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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',
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1310
# but for now, we haven't optimized...
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1311
return [canonical_relpath(base, p) for p in paths]
1314
def decode_filename(filename):
1315
"""Decode the filename using the filesystem encoding
1317
If it is unicode, it is returned.
1318
Otherwise it is decoded from the the filesystem's encoding. If decoding
1319
fails, a errors.BadFilenameEncoding exception is raised.
1321
if type(filename) is unicode:
1324
return filename.decode(_fs_enc)
1325
except UnicodeDecodeError:
1326
raise errors.BadFilenameEncoding(filename, _fs_enc)
1253
1329
def safe_unicode(unicode_or_utf8_string):
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1330
"""Coerce unicode_or_utf8_string into unicode.
1427
1509
- if BZR_COLUMNS is set, returns its value
1428
1510
- if there is no controlling terminal, returns None
1511
- query the OS, if the queried size has changed since the last query,
1429
1513
- if COLUMNS is set, returns its value,
1514
- if the OS has a value (even though it's never changed), return its value.
1431
1516
From there, we need to query the OS to get the size of the controlling
1519
On Unices we query the OS by:
1435
1520
- get termios.TIOCGWINSZ
1436
1521
- if an error occurs or a negative value is obtained, returns None
1523
On Windows we query the OS by:
1440
1524
- win32utils.get_console_size() decides,
1441
1525
- returns None on error (provided default value)
1527
# Note to implementors: if changing the rules for determining the width,
1528
# make sure you've considered the behaviour in these cases:
1529
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1530
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1532
# - (add more interesting cases here, if you find any)
1533
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1534
# but we don't want to register a signal handler because it is impossible
1535
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1536
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1537
# time so we can notice if the reported size has changed, which should have
1444
1540
# If BZR_COLUMNS is set, take it, user is always right
1541
# Except if they specified 0 in which case, impose no limit here
1446
return int(os.environ['BZR_COLUMNS'])
1543
width = int(os.environ['BZR_COLUMNS'])
1447
1544
except (KeyError, ValueError):
1546
if width is not None:
1450
1552
isatty = getattr(sys.stdout, 'isatty', None)
1451
if isatty is None or not isatty():
1553
if isatty is None or not isatty():
1452
1554
# 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))
1558
width, height = os_size = _terminal_size(None, None)
1559
global _first_terminal_size, _terminal_size_state
1560
if _terminal_size_state == 'no_data':
1561
_first_terminal_size = os_size
1562
_terminal_size_state = 'unchanged'
1563
elif (_terminal_size_state == 'unchanged' and
1564
_first_terminal_size != os_size):
1565
_terminal_size_state = 'changed'
1567
# If the OS claims to know how wide the terminal is, and this value has
1568
# ever changed, use that.
1569
if _terminal_size_state == 'changed':
1570
if width is not None and width > 0:
1573
# If COLUMNS is set, use it.
1459
1575
return int(os.environ['COLUMNS'])
1460
1576
except (KeyError, ValueError):
1463
width, height = _terminal_size(None, None)
1465
# Consider invalid values as meaning no width
1579
# Finally, use an unchanged size from the OS, if we have one.
1580
if _terminal_size_state == 'unchanged':
1581
if width is not None and width > 0:
1584
# The width could not be determined.
1471
1588
def _win32_terminal_size(width, height):
1498
1615
_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
1618
def supports_executable():
1527
1619
return sys.platform != "win32"
1959
2052
return user_encoding
2055
def get_diff_header_encoding():
2056
return get_terminal_encoding()
2059
_message_encoding = None
2062
def get_message_encoding():
2063
"""Return the encoding used for messages
2065
While the message encoding is a general setting it should usually only be
2066
needed for decoding system error strings such as from OSError instances.
2068
global _message_encoding
2069
if _message_encoding is None:
2070
if os.name == "posix":
2072
# This is a process-global setting that can change, but should in
2073
# general just get set once at process startup then be constant.
2074
_message_encoding = locale.getlocale(locale.LC_MESSAGES)[1]
2076
# On windows want the result of GetACP() which this boils down to.
2077
_message_encoding = get_user_encoding()
2078
return _message_encoding or "ascii"
1962
2081
def get_host_name():
1963
2082
"""Return the current unicode host name.
2051
2178
report_activity(sent, 'write')
2181
def connect_socket(address):
2182
# Slight variation of the socket.create_connection() function (provided by
2183
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2184
# provide it for previous python versions. Also, we don't use the timeout
2185
# parameter (provided by the python implementation) so we don't implement
2187
err = socket.error('getaddrinfo returns an empty list')
2188
host, port = address
2189
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2190
af, socktype, proto, canonname, sa = res
2193
sock = socket.socket(af, socktype, proto)
2197
except socket.error, err:
2198
# 'err' is now the most recent error
2199
if sock is not None:
2054
2204
def dereference_path(path):
2055
2205
"""Determine the real path to a file.
2114
2266
return file_kind_from_stat_mode(mode)
2115
2267
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2118
def file_kind(f, _lstat=os.lstat):
2269
def file_stat(f, _lstat=os.lstat):
2120
return file_kind_from_stat_mode(_lstat(f).st_mode)
2121
2273
except OSError, e:
2122
2274
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2123
2275
raise errors.NoSuchFile(f)
2278
def file_kind(f, _lstat=os.lstat):
2279
stat_value = file_stat(f, _lstat)
2280
return file_kind_from_stat_mode(stat_value.st_mode)
2127
2282
def until_no_eintr(f, *a, **kw):
2128
2283
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
2285
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
2286
if EINTR does occur. This is typically only true for low-level operations
2132
2287
like os.read. If in any doubt, don't use this.
2187
2343
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2191
if sys.platform == 'linux2':
2346
if sys.platform.startswith('linux'):
2192
2347
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
2349
return os.sysconf('SC_NPROCESSORS_ONLN')
2350
except (ValueError, OSError, AttributeError):
2199
2352
elif sys.platform == 'darwin':
2200
2353
def _local_concurrency():
2201
2354
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2202
2355
stdout=subprocess.PIPE).communicate()[0]
2203
elif sys.platform[0:7] == 'freebsd':
2356
elif "bsd" in sys.platform:
2204
2357
def _local_concurrency():
2205
2358
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2206
2359
stdout=subprocess.PIPE).communicate()[0]
2234
2387
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2235
2388
if concurrency is None:
2237
concurrency = _local_concurrency()
2238
except (OSError, IOError):
2390
import multiprocessing
2391
concurrency = multiprocessing.cpu_count()
2392
except (ImportError, NotImplementedError):
2393
# multiprocessing is only available on Python >= 2.6
2394
# and multiprocessing.cpu_count() isn't implemented on all
2397
concurrency = _local_concurrency()
2398
except (OSError, IOError):
2241
2401
concurrency = int(concurrency)
2242
2402
except (TypeError, ValueError):
2302
2462
return os.fdopen(os.open(filename, flags), mode, bufsize)
2304
2464
open_file = open
2467
def available_backup_name(base, exists):
2468
"""Find a non-existing backup file name.
2470
This will *not* create anything, this only return a 'free' entry. This
2471
should be used for checking names in a directory below a locked
2472
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2473
Leap) and generally discouraged.
2475
:param base: The base name.
2477
:param exists: A callable returning True if the path parameter exists.
2480
name = "%s.~%d~" % (base, counter)
2483
name = "%s.~%d~" % (base, counter)
2487
def set_fd_cloexec(fd):
2488
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2489
support for this is not available.
2493
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2494
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2495
except (ImportError, AttributeError):
2496
# Either the fcntl module or specific constants are not present
2500
def find_executable_on_path(name):
2501
"""Finds an executable on the PATH.
2503
On Windows, this will try to append each extension in the PATHEXT
2504
environment variable to the name, if it cannot be found with the name
2507
:param name: The base name of the executable.
2508
:return: The path to the executable found or None.
2510
path = os.environ.get('PATH')
2513
path = path.split(os.pathsep)
2514
if sys.platform == 'win32':
2515
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2516
exts = [ext.lower() for ext in exts]
2517
base, ext = os.path.splitext(name)
2519
if ext.lower() not in exts:
2527
f = os.path.join(d, name) + ext
2528
if os.access(f, os.X_OK):
2533
def _posix_is_local_pid_dead(pid):
2534
"""True if pid doesn't correspond to live process on this machine"""
2536
# Special meaning of unix kill: just check if it's there.
2539
if e.errno == errno.ESRCH:
2540
# On this machine, and really not found: as sure as we can be
2543
elif e.errno == errno.EPERM:
2544
# exists, though not ours
2547
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2548
# Don't really know.
2551
# Exists and our process: not dead.
2554
if sys.platform == "win32":
2555
is_local_pid_dead = win32utils.is_local_pid_dead
2557
is_local_pid_dead = _posix_is_local_pid_dead
2560
def fdatasync(fileno):
2561
"""Flush file contents to disk if possible.
2563
:param fileno: Integer OS file handle.
2564
:raises TransportNotPossible: If flushing to disk is not possible.
2566
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2571
def ensure_empty_directory_exists(path, exception_class):
2572
"""Make sure a local directory exists and is empty.
2574
If it does not exist, it is created. If it exists and is not empty, an
2575
instance of exception_class is raised.
2580
if e.errno != errno.EEXIST:
2582
if os.listdir(path) != []:
2583
raise exception_class(path)
2586
def is_environment_error(evalue):
2587
"""True if exception instance is due to a process environment issue
2589
This includes OSError and IOError, but also other errors that come from
2590
the operating system or core libraries but are not subclasses of those.
2592
if isinstance(evalue, (EnvironmentError, select.error)):
2594
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):