14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25
26
from bzrlib.lazy_import import lazy_import
26
27
lazy_import(globals(), """
27
28
from datetime import datetime
30
30
from ntpath import (abspath as _nt_abspath,
361
361
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
364
def _add_rename_error_details(e, old, new):
365
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
366
% (old, new, e.strerror))
368
new_e.to_filename = new
372
364
def _win32_rename(old, new):
373
365
"""We expect to be able to atomically replace 'new' with old.
376
368
and then deleted.
379
fancy_rename(old, new, rename_func=_wrapped_rename, unlink_func=os.unlink)
371
fancy_rename(old, new, rename_func=os.rename, unlink_func=os.unlink)
380
372
except OSError, e:
381
373
if e.errno in (errno.EPERM, errno.EACCES, errno.EBUSY, errno.EINVAL):
382
374
# If we try to rename a non-existant file onto cwd, we get
390
def _wrapped_rename(old, new):
391
"""Rename a file or directory"""
394
except (IOError, OSError), e:
395
# this is eventually called by all rename-like functions, so should
397
raise _add_rename_error_details(e, old, new)
400
382
def _mac_getcwd():
401
383
return unicodedata.normalize('NFC', os.getcwdu())
407
389
realpath = _posix_realpath
408
390
pathjoin = os.path.join
409
391
normpath = os.path.normpath
410
rename = _wrapped_rename # overridden below on win32
411
392
getcwd = os.getcwdu
412
394
dirname = os.path.dirname
413
395
basename = os.path.basename
414
396
split = os.path.split
1418
1400
terminal_width() returns None.
1403
# Keep some state so that terminal_width can detect if _terminal_size has
1404
# returned a different size since the process started. See docstring and
1405
# comments of terminal_width for details.
1406
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1407
_terminal_size_state = 'no_data'
1408
_first_terminal_size = None
1422
1410
def terminal_width():
1423
1411
"""Return terminal width.
1428
1416
- if BZR_COLUMNS is set, returns its value
1429
1417
- if there is no controlling terminal, returns None
1418
- query the OS, if the queried size has changed since the last query,
1430
1420
- if COLUMNS is set, returns its value,
1421
- if the OS has a value (even though it's never changed), return its value.
1432
1423
From there, we need to query the OS to get the size of the controlling
1426
On Unices we query the OS by:
1436
1427
- get termios.TIOCGWINSZ
1437
1428
- if an error occurs or a negative value is obtained, returns None
1430
On Windows we query the OS by:
1441
1431
- win32utils.get_console_size() decides,
1442
1432
- returns None on error (provided default value)
1434
# Note to implementors: if changing the rules for determining the width,
1435
# make sure you've considered the behaviour in these cases:
1436
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1437
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1439
# - (add more interesting cases here, if you find any)
1440
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1441
# but we don't want to register a signal handler because it is impossible
1442
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1443
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1444
# time so we can notice if the reported size has changed, which should have
1445
1447
# If BZR_COLUMNS is set, take it, user is always right
1451
1453
isatty = getattr(sys.stdout, 'isatty', None)
1452
if isatty is None or not isatty():
1454
if isatty is None or not isatty():
1453
1455
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1456
# If COLUMNS is set, take it, the terminal knows better (even inside a
1457
# given terminal, the application can decide to set COLUMNS to a lower
1458
# value (splitted screen) or a bigger value (scroll bars))
1459
width, height = os_size = _terminal_size(None, None)
1460
global _first_terminal_size, _terminal_size_state
1461
if _terminal_size_state == 'no_data':
1462
_first_terminal_size = os_size
1463
_terminal_size_state = 'unchanged'
1464
elif (_terminal_size_state == 'unchanged' and
1465
_first_terminal_size != os_size):
1466
_terminal_size_state = 'changed'
1468
# If the OS claims to know how wide the terminal is, and this value has
1469
# ever changed, use that.
1470
if _terminal_size_state == 'changed':
1471
if width is not None and width > 0:
1474
# If COLUMNS is set, use it.
1460
1476
return int(os.environ['COLUMNS'])
1461
1477
except (KeyError, ValueError):
1464
width, height = _terminal_size(None, None)
1466
# Consider invalid values as meaning no width
1480
# Finally, use an unchanged size from the OS, if we have one.
1481
if _terminal_size_state == 'unchanged':
1482
if width is not None and width > 0:
1485
# The width could not be determined.
1472
1489
def _win32_terminal_size(width, height):
1499
1516
_terminal_size = _ioctl_terminal_size
1502
def _terminal_size_changed(signum, frame):
1503
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1504
width, height = _terminal_size(None, None)
1505
if width is not None:
1506
os.environ['COLUMNS'] = str(width)
1509
_registered_sigwinch = False
1510
def watch_sigwinch():
1511
"""Register for SIGWINCH, once and only once.
1513
Do nothing if the signal module is not available.
1515
global _registered_sigwinch
1516
if not _registered_sigwinch:
1519
if getattr(signal, "SIGWINCH", None) is not None:
1520
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1522
# python doesn't provide signal support, nothing we can do about it
1524
_registered_sigwinch = True
1527
1519
def supports_executable():
1528
1520
return sys.platform != "win32"
2096
2088
base = dirname(bzrlib.__file__)
2097
2089
if getattr(sys, 'frozen', None): # bzr.exe
2098
2090
base = abspath(pathjoin(base, '..', '..'))
2099
filename = pathjoin(base, resource_relpath)
2100
return open(filename, 'rU').read()
2091
f = file(pathjoin(base, resource_relpath), "rU")
2103
2097
def file_kind_from_stat_mode_thunk(mode):
2104
2098
global file_kind_from_stat_mode
added
removed
bzrlib/osutils.py
