15
13
# You should have received a copy of the GNU General Public License
16
14
# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
from cStringIO import StringIO
21
from ntpath import (abspath as _nt_abspath,
23
normpath as _nt_normpath,
24
realpath as _nt_realpath,
25
splitdrive as _nt_splitdrive,
28
from os import listdir
33
from shutil import copyfile
35
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
36
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
27
from datetime import datetime
31
# We need to import both shutil and rmtree as we export the later on posix
32
# and need the former on windows
34
from shutil import rmtree
37
# We need to import both tempfile and mkdtemp as we export the later on posix
38
# and need the former on windows
40
from tempfile import mkdtemp
51
from bzrlib.symbol_versioning import (
56
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
58
if sys.version_info < (2, 5):
59
import md5 as _mod_md5
61
import sha as _mod_sha
45
from bzrlib.errors import (BzrError,
46
BzrBadParameterNotUnicode,
51
from bzrlib.symbol_versioning import (deprecated_function,
53
from bzrlib.trace import mutter
71
from bzrlib import symbol_versioning
74
# Cross platform wall-clock time functionality with decent resolution.
75
# On Linux ``time.clock`` returns only CPU time. On Windows, ``time.time()``
76
# only has a resolution of ~15ms. Note that ``time.clock()`` is not
77
# synchronized with ``time.time()``, this is only meant to be used to find
78
# delta times by subtracting from another call to this function.
79
timer_func = time.time
80
if sys.platform == 'win32':
81
timer_func = time.clock
83
# On win32, O_BINARY is used to indicate the file should
84
# be opened in binary mode, rather than text mode.
85
# On other platforms, O_BINARY doesn't exist, because
86
# they always open in binary mode, so it is okay to
87
# OR with 0 on those platforms.
88
# O_NOINHERIT and O_TEXT exists only on win32 too.
89
O_BINARY = getattr(os, 'O_BINARY', 0)
90
O_TEXT = getattr(os, 'O_TEXT', 0)
91
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
94
def get_unicode_argv():
96
user_encoding = get_user_encoding()
97
return [a.decode(user_encoding) for a in sys.argv[1:]]
98
except UnicodeDecodeError:
99
raise errors.BzrError(("Parameter '%r' is unsupported by the current "
56
103
def make_readonly(filename):
57
104
"""Make a filename read-only."""
58
mod = os.stat(filename).st_mode
60
os.chmod(filename, mod)
105
mod = os.lstat(filename).st_mode
106
if not stat.S_ISLNK(mod):
108
os.chmod(filename, mod)
63
111
def make_writable(filename):
64
mod = os.stat(filename).st_mode
66
os.chmod(filename, mod)
112
mod = os.lstat(filename).st_mode
113
if not stat.S_ISLNK(mod):
115
os.chmod(filename, mod)
118
def minimum_path_selection(paths):
119
"""Return the smallset subset of paths which are outside paths.
121
:param paths: A container (and hence not None) of paths.
122
:return: A set of paths sufficient to include everything in paths via
123
is_inside, drawn from the paths parameter.
129
return path.split('/')
130
sorted_paths = sorted(list(paths), key=sort_key)
132
search_paths = [sorted_paths[0]]
133
for path in sorted_paths[1:]:
134
if not is_inside(search_paths[-1], path):
135
# This path is unique, add it
136
search_paths.append(path)
138
return set(search_paths)
537
715
def local_time_offset(t=None):
538
716
"""Return offset of local zone from GMT, either at present or at time t."""
539
# python2.3 localtime() can't take None
543
if time.localtime(t).tm_isdst and time.daylight:
546
return -time.timezone
549
def format_date(t, offset=0, timezone='original', date_fmt=None,
719
offset = datetime.fromtimestamp(t) - datetime.utcfromtimestamp(t)
720
return offset.days * 86400 + offset.seconds
722
weekdays = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
723
_default_format_by_weekday_num = [wd + " %Y-%m-%d %H:%M:%S" for wd in weekdays]
726
def format_date(t, offset=0, timezone='original', date_fmt=None,
550
727
show_offset=True):
551
## TODO: Perhaps a global option to use either universal or local time?
552
## Or perhaps just let people set $TZ?
553
assert isinstance(t, float)
728
"""Return a formatted date string.
730
:param t: Seconds since the epoch.
731
:param offset: Timezone offset in seconds east of utc.
732
:param timezone: How to display the time: 'utc', 'original' for the
733
timezone specified by offset, or 'local' for the process's current
735
:param date_fmt: strftime format.
736
:param show_offset: Whether to append the timezone.
738
(date_fmt, tt, offset_str) = \
739
_format_date(t, offset, timezone, date_fmt, show_offset)
740
date_fmt = date_fmt.replace('%a', weekdays[tt[6]])
741
date_str = time.strftime(date_fmt, tt)
742
return date_str + offset_str
745
# Cache of formatted offset strings
749
def format_date_with_offset_in_original_timezone(t, offset=0,
750
_cache=_offset_cache):
751
"""Return a formatted date string in the original timezone.
753
This routine may be faster then format_date.
755
:param t: Seconds since the epoch.
756
:param offset: Timezone offset in seconds east of utc.
760
tt = time.gmtime(t + offset)
761
date_fmt = _default_format_by_weekday_num[tt[6]]
762
date_str = time.strftime(date_fmt, tt)
763
offset_str = _cache.get(offset, None)
764
if offset_str is None:
765
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
766
_cache[offset] = offset_str
767
return date_str + offset_str
770
def format_local_date(t, offset=0, timezone='original', date_fmt=None,
772
"""Return an unicode date string formatted according to the current locale.
774
:param t: Seconds since the epoch.
775
:param offset: Timezone offset in seconds east of utc.
776
:param timezone: How to display the time: 'utc', 'original' for the
777
timezone specified by offset, or 'local' for the process's current
779
:param date_fmt: strftime format.
780
:param show_offset: Whether to append the timezone.
782
(date_fmt, tt, offset_str) = \
783
_format_date(t, offset, timezone, date_fmt, show_offset)
784
date_str = time.strftime(date_fmt, tt)
785
if not isinstance(date_str, unicode):
786
date_str = date_str.decode(get_user_encoding(), 'replace')
787
return date_str + offset_str
790
def _format_date(t, offset, timezone, date_fmt, show_offset):
555
791
if timezone == 'utc':
556
792
tt = time.gmtime(t)
558
794
elif timezone == 'original':
561
797
tt = time.gmtime(t + offset)
562
798
elif timezone == 'local':
563
799
tt = time.localtime(t)
564
800
offset = local_time_offset(t)
566
raise BzrError("unsupported timezone format %r" % timezone,
567
['options are "utc", "original", "local"'])
802
raise errors.UnsupportedTimezoneFormat(timezone)
568
803
if date_fmt is None:
569
804
date_fmt = "%a %Y-%m-%d %H:%M:%S"
571
806
offset_str = ' %+03d%02d' % (offset / 3600, (offset / 60) % 60)
574
return (time.strftime(date_fmt, tt) + offset_str)
809
return (date_fmt, tt, offset_str)
577
812
def compact_date(when):
578
813
return time.strftime('%Y%m%d%H%M%S', time.gmtime(when))
816
def format_delta(delta):
817
"""Get a nice looking string for a time delta.
819
:param delta: The time difference in seconds, can be positive or negative.
820
positive indicates time in the past, negative indicates time in the
821
future. (usually time.time() - stored_time)
822
:return: String formatted to show approximate resolution
828
direction = 'in the future'
832
if seconds < 90: # print seconds up to 90 seconds
834
return '%d second %s' % (seconds, direction,)
836
return '%d seconds %s' % (seconds, direction)
838
minutes = int(seconds / 60)
839
seconds -= 60 * minutes
844
if minutes < 90: # print minutes, seconds up to 90 minutes
846
return '%d minute, %d second%s %s' % (
847
minutes, seconds, plural_seconds, direction)
849
return '%d minutes, %d second%s %s' % (
850
minutes, seconds, plural_seconds, direction)
852
hours = int(minutes / 60)
853
minutes -= 60 * hours
860
return '%d hour, %d minute%s %s' % (hours, minutes,
861
plural_minutes, direction)
862
return '%d hours, %d minute%s %s' % (hours, minutes,
863
plural_minutes, direction)
583
866
"""Return size of given open file."""
584
return os.fstat(f.fileno())[ST_SIZE]
867
return os.fstat(f.fileno())[stat.ST_SIZE]
587
870
# Define rand_bytes based on platform.
741
1139
os.path.commonprefix (python2.4) has a bad bug that it works just
742
1140
on string prefixes, assuming that '/u' is a prefix of '/u2'. This
743
1141
avoids that problem.
1143
NOTE: `base` should not have a trailing slash otherwise you'll get
1144
PathNotChild exceptions regardless of `path`.
746
assert len(base) >= MIN_ABS_PATHLENGTH, ('Length of base must be equal or'
747
' exceed the platform minimum length (which is %d)' %
1147
if len(base) < MIN_ABS_PATHLENGTH:
1148
# must have space for e.g. a drive letter
1149
raise ValueError('%r is too short to calculate a relative path'
750
1152
rp = abspath(path)
754
while len(head) >= len(base):
1157
if len(head) <= len(base) and head != base:
1158
raise errors.PathNotChild(rp, base)
755
1159
if head == base:
757
head, tail = os.path.split(head)
1161
head, tail = split(head)
761
raise PathNotChild(rp, base)
1166
return pathjoin(*reversed(s))
1171
def _cicp_canonical_relpath(base, path):
1172
"""Return the canonical path relative to base.
1174
Like relpath, but on case-insensitive-case-preserving file-systems, this
1175
will return the relpath as stored on the file-system rather than in the
1176
case specified in the input string, for all existing portions of the path.
1178
This will cause O(N) behaviour if called for every path in a tree; if you
1179
have a number of paths to convert, you should use canonical_relpaths().
1181
# TODO: it should be possible to optimize this for Windows by using the
1182
# win32 API FindFiles function to look for the specified name - but using
1183
# os.listdir() still gives us the correct, platform agnostic semantics in
1186
rel = relpath(base, path)
1187
# '.' will have been turned into ''
1191
abs_base = abspath(base)
1193
_listdir = os.listdir
1195
# use an explicit iterator so we can easily consume the rest on early exit.
1196
bit_iter = iter(rel.split('/'))
1197
for bit in bit_iter:
1200
next_entries = _listdir(current)
1201
except OSError: # enoent, eperm, etc
1202
# We can't find this in the filesystem, so just append the
1204
current = pathjoin(current, bit, *list(bit_iter))
1206
for look in next_entries:
1207
if lbit == look.lower():
1208
current = pathjoin(current, look)
1211
# got to the end, nothing matched, so we just return the
1212
# non-existing bits as they were specified (the filename may be
1213
# the target of a move, for example).
1214
current = pathjoin(current, bit, *list(bit_iter))
1216
return current[len(abs_base):].lstrip('/')
1218
# XXX - TODO - we need better detection/integration of case-insensitive
1219
# file-systems; Linux often sees FAT32 devices (or NFS-mounted OSX
1220
# filesystems), for example, so could probably benefit from the same basic
1221
# support there. For now though, only Windows and OSX get that support, and
1222
# they get it for *all* file-systems!
1223
if sys.platform in ('win32', 'darwin'):
1224
canonical_relpath = _cicp_canonical_relpath
1226
canonical_relpath = relpath
1228
def canonical_relpaths(base, paths):
1229
"""Create an iterable to canonicalize a sequence of relative paths.
1231
The intent is for this implementation to use a cache, vastly speeding
1232
up multiple transformations in the same directory.
1234
# but for now, we haven't optimized...
1235
return [canonical_relpath(base, p) for p in paths]
1238
def decode_filename(filename):
1239
"""Decode the filename using the filesystem encoding
1241
If it is unicode, it is returned.
1242
Otherwise it is decoded from the the filesystem's encoding. If decoding
1243
fails, a errors.BadFilenameEncoding exception is raised.
1245
if type(filename) is unicode:
1248
return filename.decode(_fs_enc)
1249
except UnicodeDecodeError:
1250
raise errors.BadFilenameEncoding(filename, _fs_enc)
769
1253
def safe_unicode(unicode_or_utf8_string):
770
1254
"""Coerce unicode_or_utf8_string into unicode.
772
1256
If it is unicode, it is returned.
773
Otherwise it is decoded from utf-8. If a decoding error
774
occurs, it is wrapped as a If the decoding fails, the exception is wrapped
775
as a BzrBadParameter exception.
1257
Otherwise it is decoded from utf-8. If decoding fails, the exception is
1258
wrapped in a BzrBadParameterNotUnicode exception.
777
1260
if isinstance(unicode_or_utf8_string, unicode):
778
1261
return unicode_or_utf8_string
780
1263
return unicode_or_utf8_string.decode('utf8')
781
1264
except UnicodeDecodeError:
782
raise BzrBadParameterNotUnicode(unicode_or_utf8_string)
1265
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1268
def safe_utf8(unicode_or_utf8_string):
1269
"""Coerce unicode_or_utf8_string to a utf8 string.
1271
If it is a str, it is returned.
1272
If it is Unicode, it is encoded into a utf-8 string.
1274
if isinstance(unicode_or_utf8_string, str):
1275
# TODO: jam 20070209 This is overkill, and probably has an impact on
1276
# performance if we are dealing with lots of apis that want a
1279
# Make sure it is a valid utf-8 string
1280
unicode_or_utf8_string.decode('utf-8')
1281
except UnicodeDecodeError:
1282
raise errors.BzrBadParameterNotUnicode(unicode_or_utf8_string)
1283
return unicode_or_utf8_string
1284
return unicode_or_utf8_string.encode('utf-8')
1287
_revision_id_warning = ('Unicode revision ids were deprecated in bzr 0.15.'
1288
' Revision id generators should be creating utf8'
1292
def safe_revision_id(unicode_or_utf8_string, warn=True):
1293
"""Revision ids should now be utf8, but at one point they were unicode.
1295
:param unicode_or_utf8_string: A possibly Unicode revision_id. (can also be
1297
:param warn: Functions that are sanitizing user data can set warn=False
1298
:return: None or a utf8 revision id.
1300
if (unicode_or_utf8_string is None
1301
or unicode_or_utf8_string.__class__ == str):
1302
return unicode_or_utf8_string
1304
symbol_versioning.warn(_revision_id_warning, DeprecationWarning,
1306
return cache_utf8.encode(unicode_or_utf8_string)
1309
_file_id_warning = ('Unicode file ids were deprecated in bzr 0.15. File id'
1310
' generators should be creating utf8 file ids.')
1313
def safe_file_id(unicode_or_utf8_string, warn=True):
1314
"""File ids should now be utf8, but at one point they were unicode.
1316
This is the same as safe_utf8, except it uses the cached encode functions
1317
to save a little bit of performance.
1319
:param unicode_or_utf8_string: A possibly Unicode file_id. (can also be
1321
:param warn: Functions that are sanitizing user data can set warn=False
1322
:return: None or a utf8 file id.
1324
if (unicode_or_utf8_string is None
1325
or unicode_or_utf8_string.__class__ == str):
1326
return unicode_or_utf8_string
1328
symbol_versioning.warn(_file_id_warning, DeprecationWarning,
1330
return cache_utf8.encode(unicode_or_utf8_string)
785
1333
_platform_normalizes_filenames = False
826
1374
normalized_filename = _inaccessible_normalized_filename
1377
def set_signal_handler(signum, handler, restart_syscall=True):
1378
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1379
on platforms that support that.
1381
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1382
automatically restart (by calling `signal.siginterrupt(signum,
1383
False)`). May be ignored if the feature is not available on this
1384
platform or Python version.
1388
siginterrupt = signal.siginterrupt
1390
# This python implementation doesn't provide signal support, hence no
1393
except AttributeError:
1394
# siginterrupt doesn't exist on this platform, or for this version
1396
siginterrupt = lambda signum, flag: None
1398
def sig_handler(*args):
1399
# Python resets the siginterrupt flag when a signal is
1400
# received. <http://bugs.python.org/issue8354>
1401
# As a workaround for some cases, set it back the way we want it.
1402
siginterrupt(signum, False)
1403
# Now run the handler function passed to set_signal_handler.
1406
sig_handler = handler
1407
old_handler = signal.signal(signum, sig_handler)
1409
siginterrupt(signum, False)
1413
default_terminal_width = 80
1414
"""The default terminal width for ttys.
1416
This is defined so that higher levels can share a common fallback value when
1417
terminal_width() returns None.
1420
# Keep some state so that terminal_width can detect if _terminal_size has
1421
# returned a different size since the process started. See docstring and
1422
# comments of terminal_width for details.
1423
# _terminal_size_state has 3 possible values: no_data, unchanged, and changed.
1424
_terminal_size_state = 'no_data'
1425
_first_terminal_size = None
829
1427
def terminal_width():
830
"""Return estimated terminal width."""
831
if sys.platform == 'win32':
832
import bzrlib.win32console
833
return bzrlib.win32console.get_console_size()[0]
1428
"""Return terminal width.
1430
None is returned if the width can't established precisely.
1433
- if BZR_COLUMNS is set, returns its value
1434
- if there is no controlling terminal, returns None
1435
- query the OS, if the queried size has changed since the last query,
1437
- if COLUMNS is set, returns its value,
1438
- if the OS has a value (even though it's never changed), return its value.
1440
From there, we need to query the OS to get the size of the controlling
1443
On Unices we query the OS by:
1444
- get termios.TIOCGWINSZ
1445
- if an error occurs or a negative value is obtained, returns None
1447
On Windows we query the OS by:
1448
- win32utils.get_console_size() decides,
1449
- returns None on error (provided default value)
1451
# Note to implementors: if changing the rules for determining the width,
1452
# make sure you've considered the behaviour in these cases:
1453
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1454
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1456
# - (add more interesting cases here, if you find any)
1457
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1458
# but we don't want to register a signal handler because it is impossible
1459
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1460
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1461
# time so we can notice if the reported size has changed, which should have
1464
# If BZR_COLUMNS is set, take it, user is always right
1466
return int(os.environ['BZR_COLUMNS'])
1467
except (KeyError, ValueError):
1470
isatty = getattr(sys.stdout, 'isatty', None)
1471
if isatty is None or not isatty():
1472
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1476
width, height = os_size = _terminal_size(None, None)
1477
global _first_terminal_size, _terminal_size_state
1478
if _terminal_size_state == 'no_data':
1479
_first_terminal_size = os_size
1480
_terminal_size_state = 'unchanged'
1481
elif (_terminal_size_state == 'unchanged' and
1482
_first_terminal_size != os_size):
1483
_terminal_size_state = 'changed'
1485
# If the OS claims to know how wide the terminal is, and this value has
1486
# ever changed, use that.
1487
if _terminal_size_state == 'changed':
1488
if width is not None and width > 0:
1491
# If COLUMNS is set, use it.
1493
return int(os.environ['COLUMNS'])
1494
except (KeyError, ValueError):
1497
# Finally, use an unchanged size from the OS, if we have one.
1498
if _terminal_size_state == 'unchanged':
1499
if width is not None and width > 0:
1502
# The width could not be determined.
1506
def _win32_terminal_size(width, height):
1507
width, height = win32utils.get_console_size(defaultx=width, defaulty=height)
1508
return width, height
1511
def _ioctl_terminal_size(width, height):
836
1513
import struct, fcntl, termios
837
1514
s = struct.pack('HHHH', 0, 0, 0, 0)
838
1515
x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
839
width = struct.unpack('HHHH', x)[1]
1516
height, width = struct.unpack('HHHH', x)[0:2]
1517
except (IOError, AttributeError):
844
width = int(os.environ['COLUMNS'])
1519
return width, height
1521
_terminal_size = None
1522
"""Returns the terminal size as (width, height).
1524
:param width: Default value for width.
1525
:param height: Default value for height.
1527
This is defined specifically for each OS and query the size of the controlling
1528
terminal. If any error occurs, the provided default values should be returned.
1530
if sys.platform == 'win32':
1531
_terminal_size = _win32_terminal_size
1533
_terminal_size = _ioctl_terminal_size
852
1536
def supports_executable():
853
1537
return sys.platform != "win32"
1540
def supports_posix_readonly():
1541
"""Return True if 'readonly' has POSIX semantics, False otherwise.
1543
Notably, a win32 readonly file cannot be deleted, unlike POSIX where the
1544
directory controls creation/deletion, etc.
1546
And under win32, readonly means that the directory itself cannot be
1547
deleted. The contents of a readonly directory can be changed, unlike POSIX
1548
where files in readonly directories cannot be added, deleted or renamed.
1550
return sys.platform != "win32"
1553
def set_or_unset_env(env_variable, value):
1554
"""Modify the environment, setting or removing the env_variable.
1556
:param env_variable: The environment variable in question
1557
:param value: The value to set the environment to. If None, then
1558
the variable will be removed.
1559
:return: The original value of the environment variable.
1561
orig_val = os.environ.get(env_variable)
1563
if orig_val is not None:
1564
del os.environ[env_variable]
1566
if isinstance(value, unicode):
1567
value = value.encode(get_user_encoding())
1568
os.environ[env_variable] = value
856
1572
_validWin32PathRE = re.compile(r'^([A-Za-z]:[/\\])?[^:<>*"?\|]*$')
859
1575
def check_legal_path(path):
860
"""Check whether the supplied path is legal.
1576
"""Check whether the supplied path is legal.
861
1577
This is only required on Windows, so we don't test on other platforms
864
1580
if sys.platform != "win32":
866
1582
if _validWin32PathRE.match(path) is None:
867
raise IllegalPath(path)
1583
raise errors.IllegalPath(path)
1586
_WIN32_ERROR_DIRECTORY = 267 # Similar to errno.ENOTDIR
1588
def _is_error_enotdir(e):
1589
"""Check if this exception represents ENOTDIR.
1591
Unfortunately, python is very inconsistent about the exception
1592
here. The cases are:
1593
1) Linux, Mac OSX all versions seem to set errno == ENOTDIR
1594
2) Windows, Python2.4, uses errno == ERROR_DIRECTORY (267)
1595
which is the windows error code.
1596
3) Windows, Python2.5 uses errno == EINVAL and
1597
winerror == ERROR_DIRECTORY
1599
:param e: An Exception object (expected to be OSError with an errno
1600
attribute, but we should be able to cope with anything)
1601
:return: True if this represents an ENOTDIR error. False otherwise.
1603
en = getattr(e, 'errno', None)
1604
if (en == errno.ENOTDIR
1605
or (sys.platform == 'win32'
1606
and (en == _WIN32_ERROR_DIRECTORY
1607
or (en == errno.EINVAL
1608
and getattr(e, 'winerror', None) == _WIN32_ERROR_DIRECTORY)
870
1614
def walkdirs(top, prefix=""):
871
1615
"""Yield data about all the directories in a tree.
873
1617
This yields all the data about the contents of a directory at a time.
874
1618
After each directory has been yielded, if the caller has mutated the list
875
1619
to exclude some directories, they are then not descended into.
877
1621
The data yielded is of the form:
878
[(relpath, basename, kind, lstat, path_from_top), ...]
1622
((directory-relpath, directory-path-from-top),
1623
[(relpath, basename, kind, lstat, path-from-top), ...]),
1624
- directory-relpath is the relative path of the directory being returned
1625
with respect to top. prefix is prepended to this.
1626
- directory-path-from-root is the path including top for this directory.
1627
It is suitable for use with os functions.
1628
- relpath is the relative path within the subtree being walked.
1629
- basename is the basename of the path
1630
- kind is the kind of the file now. If unknown then the file is not
1631
present within the tree - but it may be recorded as versioned. See
1633
- lstat is the stat data *if* the file was statted.
1634
- planned, not implemented:
1635
path_from_tree_root is the path from the root of the tree.
880
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
1637
:param prefix: Prefix the relpaths that are yielded with 'prefix'. This
881
1638
allows one to walk a subtree but get paths that are relative to a tree
882
1639
rooted higher up.
883
1640
:return: an iterator over the dirs.
1642
#TODO there is a bit of a smell where the results of the directory-
1643
# summary in this, and the path from the root, may not agree
1644
# depending on top and prefix - i.e. ./foo and foo as a pair leads to
1645
# potentially confusing output. We should make this more robust - but
1646
# not at a speed cost. RBC 20060731
887
1648
_directory = _directory_kind
889
pending = [(prefix, "", _directory, None, top)]
1649
_listdir = os.listdir
1650
_kind_from_mode = file_kind_from_stat_mode
1651
pending = [(safe_unicode(prefix), "", _directory, None, safe_unicode(top))]
892
currentdir = pending.pop()
893
1653
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
896
relroot = currentdir[0] + '/'
1654
relroot, _, _, _, top = pending.pop()
1656
relprefix = relroot + u'/'
1659
top_slash = top + u'/'
1662
append = dirblock.append
1664
names = sorted(map(decode_filename, _listdir(top)))
1666
if not _is_error_enotdir(e):
1670
abspath = top_slash + name
1671
statvalue = _lstat(abspath)
1672
kind = _kind_from_mode(statvalue.st_mode)
1673
append((relprefix + name, name, kind, statvalue, abspath))
1674
yield (relroot, top), dirblock
1676
# push the user specified dirs from dirblock
1677
pending.extend(d for d in reversed(dirblock) if d[2] == _directory)
1680
class DirReader(object):
1681
"""An interface for reading directories."""
1683
def top_prefix_to_starting_dir(self, top, prefix=""):
1684
"""Converts top and prefix to a starting dir entry
1686
:param top: A utf8 path
1687
:param prefix: An optional utf8 path to prefix output relative paths
1689
:return: A tuple starting with prefix, and ending with the native
1692
raise NotImplementedError(self.top_prefix_to_starting_dir)
1694
def read_dir(self, prefix, top):
1695
"""Read a specific dir.
1697
:param prefix: A utf8 prefix to be preprended to the path basenames.
1698
:param top: A natively encoded path to read.
1699
:return: A list of the directories contents. Each item contains:
1700
(utf8_relpath, utf8_name, kind, lstatvalue, native_abspath)
1702
raise NotImplementedError(self.read_dir)
1705
_selected_dir_reader = None
1708
def _walkdirs_utf8(top, prefix=""):
1709
"""Yield data about all the directories in a tree.
1711
This yields the same information as walkdirs() only each entry is yielded
1712
in utf-8. On platforms which have a filesystem encoding of utf8 the paths
1713
are returned as exact byte-strings.
1715
:return: yields a tuple of (dir_info, [file_info])
1716
dir_info is (utf8_relpath, path-from-top)
1717
file_info is (utf8_relpath, utf8_name, kind, lstat, path-from-top)
1718
if top is an absolute path, path-from-top is also an absolute path.
1719
path-from-top might be unicode or utf8, but it is the correct path to
1720
pass to os functions to affect the file in question. (such as os.lstat)
1722
global _selected_dir_reader
1723
if _selected_dir_reader is None:
1724
fs_encoding = _fs_enc.upper()
1725
if sys.platform == "win32" and win32utils.winver == 'Windows NT':
1726
# Win98 doesn't have unicode apis like FindFirstFileW
1727
# TODO: We possibly could support Win98 by falling back to the
1728
# original FindFirstFile, and using TCHAR instead of WCHAR,
1729
# but that gets a bit tricky, and requires custom compiling
1732
from bzrlib._walkdirs_win32 import Win32ReadDir
1733
_selected_dir_reader = Win32ReadDir()
1736
elif fs_encoding in ('UTF-8', 'US-ASCII', 'ANSI_X3.4-1968'):
1737
# ANSI_X3.4-1968 is a form of ASCII
1739
from bzrlib._readdir_pyx import UTF8DirReader
1740
_selected_dir_reader = UTF8DirReader()
1741
except ImportError, e:
1742
failed_to_load_extension(e)
1745
if _selected_dir_reader is None:
1746
# Fallback to the python version
1747
_selected_dir_reader = UnicodeDirReader()
1749
# 0 - relpath, 1- basename, 2- kind, 3- stat, 4-toppath
1750
# But we don't actually uses 1-3 in pending, so set them to None
1751
pending = [[_selected_dir_reader.top_prefix_to_starting_dir(top, prefix)]]
1752
read_dir = _selected_dir_reader.read_dir
1753
_directory = _directory_kind
1755
relroot, _, _, _, top = pending[-1].pop()
1758
dirblock = sorted(read_dir(relroot, top))
1759
yield (relroot, top), dirblock
1760
# push the user specified dirs from dirblock
1761
next = [d for d in reversed(dirblock) if d[2] == _directory]
1763
pending.append(next)
1766
class UnicodeDirReader(DirReader):
1767
"""A dir reader for non-utf8 file systems, which transcodes."""
1769
__slots__ = ['_utf8_encode']
1772
self._utf8_encode = codecs.getencoder('utf8')
1774
def top_prefix_to_starting_dir(self, top, prefix=""):
1775
"""See DirReader.top_prefix_to_starting_dir."""
1776
return (safe_utf8(prefix), None, None, None, safe_unicode(top))
1778
def read_dir(self, prefix, top):
1779
"""Read a single directory from a non-utf8 file system.
1781
top, and the abspath element in the output are unicode, all other paths
1782
are utf8. Local disk IO is done via unicode calls to listdir etc.
1784
This is currently the fallback code path when the filesystem encoding is
1785
not UTF-8. It may be better to implement an alternative so that we can
1786
safely handle paths that are not properly decodable in the current
1789
See DirReader.read_dir for details.
1791
_utf8_encode = self._utf8_encode
1793
_listdir = os.listdir
1794
_kind_from_mode = file_kind_from_stat_mode
1797
relprefix = prefix + '/'
1800
top_slash = top + u'/'
1803
append = dirblock.append
899
1804
for name in sorted(_listdir(top)):
900
abspath = top + '/' + name
901
statvalue = lstat(abspath)
902
dirblock.append ((relroot + name, name, file_kind_from_stat_mode(statvalue.st_mode), statvalue, abspath))
904
# push the user specified dirs from dirblock
905
for dir in reversed(dirblock):
906
if dir[2] == _directory:
1806
name_utf8 = _utf8_encode(name)[0]
1807
except UnicodeDecodeError:
1808
raise errors.BadFilenameEncoding(
1809
_utf8_encode(relprefix)[0] + name, _fs_enc)
1810
abspath = top_slash + name
1811
statvalue = _lstat(abspath)
1812
kind = _kind_from_mode(statvalue.st_mode)
1813
append((relprefix + name_utf8, name_utf8, kind, statvalue, abspath))
1817
def copy_tree(from_path, to_path, handlers={}):
1818
"""Copy all of the entries in from_path into to_path.
1820
:param from_path: The base directory to copy.
1821
:param to_path: The target directory. If it does not exist, it will
1823
:param handlers: A dictionary of functions, which takes a source and
1824
destinations for files, directories, etc.
1825
It is keyed on the file kind, such as 'directory', 'symlink', or 'file'
1826
'file', 'directory', and 'symlink' should always exist.
1827
If they are missing, they will be replaced with 'os.mkdir()',
1828
'os.readlink() + os.symlink()', and 'shutil.copy2()', respectively.
1830
# Now, just copy the existing cached tree to the new location
1831
# We use a cheap trick here.
1832
# Absolute paths are prefixed with the first parameter
1833
# relative paths are prefixed with the second.
1834
# So we can get both the source and target returned
1835
# without any extra work.
1837
def copy_dir(source, dest):
1840
def copy_link(source, dest):
1841
"""Copy the contents of a symlink"""
1842
link_to = os.readlink(source)
1843
os.symlink(link_to, dest)
1845
real_handlers = {'file':shutil.copy2,
1846
'symlink':copy_link,
1847
'directory':copy_dir,
1849
real_handlers.update(handlers)
1851
if not os.path.exists(to_path):
1852
real_handlers['directory'](from_path, to_path)
1854
for dir_info, entries in walkdirs(from_path, prefix=to_path):
1855
for relpath, name, kind, st, abspath in entries:
1856
real_handlers[kind](abspath, relpath)
1859
def copy_ownership_from_path(dst, src=None):
1860
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1862
If src is None, the containing directory is used as source. If chown
1863
fails, the error is ignored and a warning is printed.
1865
chown = getattr(os, 'chown', None)
1870
src = os.path.dirname(dst)
1876
chown(dst, s.st_uid, s.st_gid)
1878
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
910
1881
def path_prefix_key(path):
920
1891
key_a = path_prefix_key(path_a)
921
1892
key_b = path_prefix_key(path_b)
922
1893
return cmp(key_a, key_b)
1896
_cached_user_encoding = None
1899
def get_user_encoding(use_cache=True):
1900
"""Find out what the preferred user encoding is.
1902
This is generally the encoding that is used for command line parameters
1903
and file contents. This may be different from the terminal encoding
1904
or the filesystem encoding.
1906
:param use_cache: Enable cache for detected encoding.
1907
(This parameter is turned on by default,
1908
and required only for selftesting)
1910
:return: A string defining the preferred user encoding
1912
global _cached_user_encoding
1913
if _cached_user_encoding is not None and use_cache:
1914
return _cached_user_encoding
1916
if sys.platform == 'darwin':
1917
# python locale.getpreferredencoding() always return
1918
# 'mac-roman' on darwin. That's a lie.
1919
sys.platform = 'posix'
1921
if os.environ.get('LANG', None) is None:
1922
# If LANG is not set, we end up with 'ascii', which is bad
1923
# ('mac-roman' is more than ascii), so we set a default which
1924
# will give us UTF-8 (which appears to work in all cases on
1925
# OSX). Users are still free to override LANG of course, as
1926
# long as it give us something meaningful. This work-around
1927
# *may* not be needed with python 3k and/or OSX 10.5, but will
1928
# work with them too -- vila 20080908
1929
os.environ['LANG'] = 'en_US.UTF-8'
1932
sys.platform = 'darwin'
1937
user_encoding = locale.getpreferredencoding()
1938
except locale.Error, e:
1939
sys.stderr.write('bzr: warning: %s\n'
1940
' Could not determine what text encoding to use.\n'
1941
' This error usually means your Python interpreter\n'
1942
' doesn\'t support the locale set by $LANG (%s)\n'
1943
" Continuing with ascii encoding.\n"
1944
% (e, os.environ.get('LANG')))
1945
user_encoding = 'ascii'
1947
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1948
# treat that as ASCII, and not support printing unicode characters to the
1951
# For python scripts run under vim, we get '', so also treat that as ASCII
1952
if user_encoding in (None, 'cp0', ''):
1953
user_encoding = 'ascii'
1957
codecs.lookup(user_encoding)
1959
sys.stderr.write('bzr: warning:'
1960
' unknown encoding %s.'
1961
' Continuing with ascii encoding.\n'
1964
user_encoding = 'ascii'
1967
_cached_user_encoding = user_encoding
1969
return user_encoding
1972
def get_diff_header_encoding():
1973
return get_terminal_encoding()
1976
def get_host_name():
1977
"""Return the current unicode host name.
1979
This is meant to be used in place of socket.gethostname() because that
1980
behaves inconsistently on different platforms.
1982
if sys.platform == "win32":
1984
return win32utils.get_host_name()
1987
return socket.gethostname().decode(get_user_encoding())
1990
# We must not read/write any more than 64k at a time from/to a socket so we
1991
# don't risk "no buffer space available" errors on some platforms. Windows in
1992
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1994
MAX_SOCKET_CHUNK = 64 * 1024
1996
def read_bytes_from_socket(sock, report_activity=None,
1997
max_read_size=MAX_SOCKET_CHUNK):
1998
"""Read up to max_read_size of bytes from sock and notify of progress.
2000
Translates "Connection reset by peer" into file-like EOF (return an
2001
empty string rather than raise an error), and repeats the recv if
2002
interrupted by a signal.
2006
bytes = sock.recv(max_read_size)
2007
except socket.error, e:
2009
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
2010
# The connection was closed by the other side. Callers expect
2011
# an empty string to signal end-of-stream.
2013
elif eno == errno.EINTR:
2014
# Retry the interrupted recv.
2018
if report_activity is not None:
2019
report_activity(len(bytes), 'read')
2023
def recv_all(socket, count):
2024
"""Receive an exact number of bytes.
2026
Regular Socket.recv() may return less than the requested number of bytes,
2027
depending on what's in the OS buffer. MSG_WAITALL is not available
2028
on all platforms, but this should work everywhere. This will return
2029
less than the requested amount if the remote end closes.
2031
This isn't optimized and is intended mostly for use in testing.
2034
while len(b) < count:
2035
new = read_bytes_from_socket(socket, None, count - len(b))
2042
def send_all(sock, bytes, report_activity=None):
2043
"""Send all bytes on a socket.
2045
Breaks large blocks in smaller chunks to avoid buffering limitations on
2046
some platforms, and catches EINTR which may be thrown if the send is
2047
interrupted by a signal.
2049
This is preferred to socket.sendall(), because it avoids portability bugs
2050
and provides activity reporting.
2052
:param report_activity: Call this as bytes are read, see
2053
Transport._report_activity
2056
byte_count = len(bytes)
2057
while sent_total < byte_count:
2059
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2060
except socket.error, e:
2061
if e.args[0] != errno.EINTR:
2065
report_activity(sent, 'write')
2068
def connect_socket(address):
2069
# Slight variation of the socket.create_connection() function (provided by
2070
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2071
# provide it for previous python versions. Also, we don't use the timeout
2072
# parameter (provided by the python implementation) so we don't implement
2074
err = socket.error('getaddrinfo returns an empty list')
2075
host, port = address
2076
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2077
af, socktype, proto, canonname, sa = res
2080
sock = socket.socket(af, socktype, proto)
2084
except socket.error, err:
2085
# 'err' is now the most recent error
2086
if sock is not None:
2091
def dereference_path(path):
2092
"""Determine the real path to a file.
2094
All parent elements are dereferenced. But the file itself is not
2096
:param path: The original path. May be absolute or relative.
2097
:return: the real path *to* the file
2099
parent, base = os.path.split(path)
2100
# The pathjoin for '.' is a workaround for Python bug #1213894.
2101
# (initial path components aren't dereferenced)
2102
return pathjoin(realpath(pathjoin('.', parent)), base)
2105
def supports_mapi():
2106
"""Return True if we can use MAPI to launch a mail client."""
2107
return sys.platform == "win32"
2110
def resource_string(package, resource_name):
2111
"""Load a resource from a package and return it as a string.
2113
Note: Only packages that start with bzrlib are currently supported.
2115
This is designed to be a lightweight implementation of resource
2116
loading in a way which is API compatible with the same API from
2118
http://peak.telecommunity.com/DevCenter/PkgResources#basic-resource-access.
2119
If and when pkg_resources becomes a standard library, this routine
2122
# Check package name is within bzrlib
2123
if package == "bzrlib":
2124
resource_relpath = resource_name
2125
elif package.startswith("bzrlib."):
2126
package = package[len("bzrlib."):].replace('.', os.sep)
2127
resource_relpath = pathjoin(package, resource_name)
2129
raise errors.BzrError('resource package %s not in bzrlib' % package)
2131
# Map the resource to a file and read its contents
2132
base = dirname(bzrlib.__file__)
2133
if getattr(sys, 'frozen', None): # bzr.exe
2134
base = abspath(pathjoin(base, '..', '..'))
2135
f = file(pathjoin(base, resource_relpath), "rU")
2141
def file_kind_from_stat_mode_thunk(mode):
2142
global file_kind_from_stat_mode
2143
if file_kind_from_stat_mode is file_kind_from_stat_mode_thunk:
2145
from bzrlib._readdir_pyx import UTF8DirReader
2146
file_kind_from_stat_mode = UTF8DirReader().kind_from_mode
2147
except ImportError, e:
2148
# This is one time where we won't warn that an extension failed to
2149
# load. The extension is never available on Windows anyway.
2150
from bzrlib._readdir_py import (
2151
_kind_from_mode as file_kind_from_stat_mode
2153
return file_kind_from_stat_mode(mode)
2154
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2157
def file_kind(f, _lstat=os.lstat):
2159
return file_kind_from_stat_mode(_lstat(f).st_mode)
2161
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2162
raise errors.NoSuchFile(f)
2166
def until_no_eintr(f, *a, **kw):
2167
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2169
WARNING: you must be certain that it is safe to retry the call repeatedly
2170
if EINTR does occur. This is typically only true for low-level operations
2171
like os.read. If in any doubt, don't use this.
2173
Keep in mind that this is not a complete solution to EINTR. There is
2174
probably code in the Python standard library and other dependencies that
2175
may encounter EINTR if a signal arrives (and there is signal handler for
2176
that signal). So this function can reduce the impact for IO that bzrlib
2177
directly controls, but it is not a complete solution.
2179
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2183
except (IOError, OSError), e:
2184
if e.errno == errno.EINTR:
2189
@deprecated_function(deprecated_in((2, 2, 0)))
2190
def re_compile_checked(re_string, flags=0, where=""):
2191
"""Return a compiled re, or raise a sensible error.
2193
This should only be used when compiling user-supplied REs.
2195
:param re_string: Text form of regular expression.
2196
:param flags: eg re.IGNORECASE
2197
:param where: Message explaining to the user the context where
2198
it occurred, eg 'log search filter'.
2200
# from https://bugs.launchpad.net/bzr/+bug/251352
2202
re_obj = re.compile(re_string, flags)
2205
except errors.InvalidPattern, e:
2207
where = ' in ' + where
2208
# despite the name 'error' is a type
2209
raise errors.BzrCommandError('Invalid regular expression%s: %s'
2213
if sys.platform == "win32":
2216
return msvcrt.getch()
2221
fd = sys.stdin.fileno()
2222
settings = termios.tcgetattr(fd)
2225
ch = sys.stdin.read(1)
2227
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2231
if sys.platform == 'linux2':
2232
def _local_concurrency():
2234
prefix = 'processor'
2235
for line in file('/proc/cpuinfo', 'rb'):
2236
if line.startswith(prefix):
2237
concurrency = int(line[line.find(':')+1:]) + 1
2239
elif sys.platform == 'darwin':
2240
def _local_concurrency():
2241
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2242
stdout=subprocess.PIPE).communicate()[0]
2243
elif sys.platform[0:7] == 'freebsd':
2244
def _local_concurrency():
2245
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2246
stdout=subprocess.PIPE).communicate()[0]
2247
elif sys.platform == 'sunos5':
2248
def _local_concurrency():
2249
return subprocess.Popen(['psrinfo', '-p',],
2250
stdout=subprocess.PIPE).communicate()[0]
2251
elif sys.platform == "win32":
2252
def _local_concurrency():
2253
# This appears to return the number of cores.
2254
return os.environ.get('NUMBER_OF_PROCESSORS')
2256
def _local_concurrency():
2261
_cached_local_concurrency = None
2263
def local_concurrency(use_cache=True):
2264
"""Return how many processes can be run concurrently.
2266
Rely on platform specific implementations and default to 1 (one) if
2267
anything goes wrong.
2269
global _cached_local_concurrency
2271
if _cached_local_concurrency is not None and use_cache:
2272
return _cached_local_concurrency
2274
concurrency = os.environ.get('BZR_CONCURRENCY', None)
2275
if concurrency is None:
2277
concurrency = _local_concurrency()
2278
except (OSError, IOError):
2281
concurrency = int(concurrency)
2282
except (TypeError, ValueError):
2285
_cached_concurrency = concurrency
2289
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2290
"""A stream writer that doesn't decode str arguments."""
2292
def __init__(self, encode, stream, errors='strict'):
2293
codecs.StreamWriter.__init__(self, stream, errors)
2294
self.encode = encode
2296
def write(self, object):
2297
if type(object) is str:
2298
self.stream.write(object)
2300
data, _ = self.encode(object, self.errors)
2301
self.stream.write(data)
2303
if sys.platform == 'win32':
2304
def open_file(filename, mode='r', bufsize=-1):
2305
"""This function is used to override the ``open`` builtin.
2307
But it uses O_NOINHERIT flag so the file handle is not inherited by
2308
child processes. Deleting or renaming a closed file opened with this
2309
function is not blocking child processes.
2311
writing = 'w' in mode
2312
appending = 'a' in mode
2313
updating = '+' in mode
2314
binary = 'b' in mode
2317
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2318
# for flags for each modes.
2328
flags |= os.O_WRONLY
2329
flags |= os.O_CREAT | os.O_TRUNC
2334
flags |= os.O_WRONLY
2335
flags |= os.O_CREAT | os.O_APPEND
2340
flags |= os.O_RDONLY
2342
return os.fdopen(os.open(filename, flags), mode, bufsize)
2347
def getuser_unicode():
2348
"""Return the username as unicode.
2351
user_encoding = get_user_encoding()
2352
username = getpass.getuser().decode(user_encoding)
2353
except UnicodeDecodeError:
2354
raise errors.BzrError("Can't decode username as %s." % \
2359
def available_backup_name(base, exists):
2360
"""Find a non-existing backup file name.
2362
This will *not* create anything, this only return a 'free' entry. This
2363
should be used for checking names in a directory below a locked
2364
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2365
Leap) and generally discouraged.
2367
:param base: The base name.
2369
:param exists: A callable returning True if the path parameter exists.
2372
name = "%s.~%d~" % (base, counter)
2375
name = "%s.~%d~" % (base, counter)
added
removed
bzrlib/osutils.py
