# util.py - Mercurial utility functions and platform specific implementations
#
# Copyright 2005 K. Thananchayan <thananck@yahoo.com>
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""Mercurial utility functions and platform specific implementations.
This contains helper routines that are independent of the SCM core and
hide platform-specific details from the core.
"""
from __future__ import absolute_import
import bz2
import calendar
import collections
import datetime
import errno
import gc
import hashlib
import imp
import os
import re as remod
import shutil
import signal
import socket
import subprocess
import sys
import tempfile
import textwrap
import time
import traceback
import urllib
import zlib
from . import (
encoding,
error,
i18n,
osutil,
parsers,
)
if os.name == 'nt':
from . import windows as platform
else:
from . import posix as platform
md5 = hashlib.md5
sha1 = hashlib.sha1
sha512 = hashlib.sha512
_ = i18n._
cachestat = platform.cachestat
checkexec = platform.checkexec
checklink = platform.checklink
copymode = platform.copymode
executablepath = platform.executablepath
expandglobs = platform.expandglobs
explainexit = platform.explainexit
findexe = platform.findexe
gethgcmd = platform.gethgcmd
getuser = platform.getuser
groupmembers = platform.groupmembers
groupname = platform.groupname
hidewindow = platform.hidewindow
isexec = platform.isexec
isowner = platform.isowner
localpath = platform.localpath
lookupreg = platform.lookupreg
makedir = platform.makedir
nlinks = platform.nlinks
normpath = platform.normpath
normcase = platform.normcase
normcasespec = platform.normcasespec
normcasefallback = platform.normcasefallback
openhardlinks = platform.openhardlinks
oslink = platform.oslink
parsepatchoutput = platform.parsepatchoutput
pconvert = platform.pconvert
poll = platform.poll
popen = platform.popen
posixfile = platform.posixfile
quotecommand = platform.quotecommand
readpipe = platform.readpipe
rename = platform.rename
removedirs = platform.removedirs
samedevice = platform.samedevice
samefile = platform.samefile
samestat = platform.samestat
setbinary = platform.setbinary
setflags = platform.setflags
setsignalhandler = platform.setsignalhandler
shellquote = platform.shellquote
spawndetached = platform.spawndetached
split = platform.split
sshargs = platform.sshargs
statfiles = getattr(osutil, 'statfiles', platform.statfiles)
statisexec = platform.statisexec
statislink = platform.statislink
termwidth = platform.termwidth
testpid = platform.testpid
umask = platform.umask
unlink = platform.unlink
unlinkpath = platform.unlinkpath
username = platform.username
# Python compatibility
_notset = object()
# disable Python's problematic floating point timestamps (issue4836)
# (Python hypocritically says you shouldn't change this behavior in
# libraries, and sure enough Mercurial is not a library.)
os.stat_float_times(False)
def safehasattr(thing, attr):
return getattr(thing, attr, _notset) is not _notset
DIGESTS = {
'md5': md5,
'sha1': sha1,
'sha512': sha512,
}
# List of digest types from strongest to weakest
DIGESTS_BY_STRENGTH = ['sha512', 'sha1', 'md5']
for k in DIGESTS_BY_STRENGTH:
assert k in DIGESTS
class digester(object):
"""helper to compute digests.
This helper can be used to compute one or more digests given their name.
>>> d = digester(['md5', 'sha1'])
>>> d.update('foo')
>>> [k for k in sorted(d)]
['md5', 'sha1']
>>> d['md5']
'acbd18db4cc2f85cedef654fccc4a4d8'
>>> d['sha1']
'0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33'
>>> digester.preferred(['md5', 'sha1'])
'sha1'
"""
def __init__(self, digests, s=''):
self._hashes = {}
for k in digests:
if k not in DIGESTS:
raise Abort(_('unknown digest type: %s') % k)
self._hashes[k] = DIGESTS[k]()
if s:
self.update(s)
def update(self, data):
for h in self._hashes.values():
h.update(data)
def __getitem__(self, key):
if key not in DIGESTS:
raise Abort(_('unknown digest type: %s') % k)
return self._hashes[key].hexdigest()
def __iter__(self):
return iter(self._hashes)
@staticmethod
def preferred(supported):
"""returns the strongest digest type in both supported and DIGESTS."""
for k in DIGESTS_BY_STRENGTH:
if k in supported:
return k
return None
class digestchecker(object):
"""file handle wrapper that additionally checks content against a given
size and digests.
d = digestchecker(fh, size, {'md5': '...'})
When multiple digests are given, all of them are validated.
"""
def __init__(self, fh, size, digests):
self._fh = fh
self._size = size
self._got = 0
self._digests = dict(digests)
self._digester = digester(self._digests.keys())
def read(self, length=-1):
content = self._fh.read(length)
self._digester.update(content)
self._got += len(content)
return content
def validate(self):
if self._size != self._got:
raise Abort(_('size mismatch: expected %d, got %d') %
(self._size, self._got))
for k, v in self._digests.items():
if v != self._digester[k]:
# i18n: first parameter is a digest name
raise Abort(_('%s mismatch: expected %s, got %s') %
(k, v, self._digester[k]))
try:
buffer = buffer
except NameError:
if sys.version_info[0] < 3:
def buffer(sliceable, offset=0):
return sliceable[offset:]
else:
def buffer(sliceable, offset=0):
return memoryview(sliceable)[offset:]
closefds = os.name == 'posix'
_chunksize = 4096
class bufferedinputpipe(object):
"""a manually buffered input pipe
Python will not let us use buffered IO and lazy reading with 'polling' at
the same time. We cannot probe the buffer state and select will not detect
that data are ready to read if they are already buffered.
This class let us work around that by implementing its own buffering
(allowing efficient readline) while offering a way to know if the buffer is
empty from the output (allowing collaboration of the buffer with polling).
This class lives in the 'util' module because it makes use of the 'os'
module from the python stdlib.
"""
def __init__(self, input):
self._input = input
self._buffer = []
self._eof = False
self._lenbuf = 0
@property
def hasbuffer(self):
"""True is any data is currently buffered
This will be used externally a pre-step for polling IO. If there is
already data then no polling should be set in place."""
return bool(self._buffer)
@property
def closed(self):
return self._input.closed
def fileno(self):
return self._input.fileno()
def close(self):
return self._input.close()
def read(self, size):
while (not self._eof) and (self._lenbuf < size):
self._fillbuffer()
return self._frombuffer(size)
def readline(self, *args, **kwargs):
if 1 < len(self._buffer):
# this should not happen because both read and readline end with a
# _frombuffer call that collapse it.
self._buffer = [''.join(self._buffer)]
self._lenbuf = len(self._buffer[0])
lfi = -1
if self._buffer:
lfi = self._buffer[-1].find('\n')
while (not self._eof) and lfi < 0:
self._fillbuffer()
if self._buffer:
lfi = self._buffer[-1].find('\n')
size = lfi + 1
if lfi < 0: # end of file
size = self._lenbuf
elif 1 < len(self._buffer):
# we need to take previous chunks into account
size += self._lenbuf - len(self._buffer[-1])
return self._frombuffer(size)
def _frombuffer(self, size):
"""return at most 'size' data from the buffer
The data are removed from the buffer."""
if size == 0 or not self._buffer:
return ''
buf = self._buffer[0]
if 1 < len(self._buffer):
buf = ''.join(self._buffer)
data = buf[:size]
buf = buf[len(data):]
if buf:
self._buffer = [buf]
self._lenbuf = len(buf)
else:
self._buffer = []
self._lenbuf = 0
return data
def _fillbuffer(self):
"""read data to the buffer"""
data = os.read(self._input.fileno(), _chunksize)
if not data:
self._eof = True
else:
self._lenbuf += len(data)
self._buffer.append(data)
def popen2(cmd, env=None, newlines=False):
# Setting bufsize to -1 lets the system decide the buffer size.
# The default for bufsize is 0, meaning unbuffered. This leads to
# poor performance on Mac OS X: http://bugs.python.org/issue4194
p = subprocess.Popen(cmd, shell=True, bufsize=-1,
close_fds=closefds,
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
universal_newlines=newlines,
env=env)
return p.stdin, p.stdout
def popen3(cmd, env=None, newlines=False):
stdin, stdout, stderr, p = popen4(cmd, env, newlines)
return stdin, stdout, stderr
def popen4(cmd, env=None, newlines=False, bufsize=-1):
p = subprocess.Popen(cmd, shell=True, bufsize=bufsize,
close_fds=closefds,
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=newlines,
env=env)
return p.stdin, p.stdout, p.stderr, p
def version():
"""Return version information if available."""
try:
from . import __version__
return __version__.version
except ImportError:
return 'unknown'
def versiontuple(v=None, n=4):
"""Parses a Mercurial version string into an N-tuple.
The version string to be parsed is specified with the ``v`` argument.
If it isn't defined, the current Mercurial version string will be parsed.
``n`` can be 2, 3, or 4. Here is how some version strings map to
returned values:
>>> v = '3.6.1+190-df9b73d2d444'
>>> versiontuple(v, 2)
(3, 6)
>>> versiontuple(v, 3)
(3, 6, 1)
>>> versiontuple(v, 4)
(3, 6, 1, '190-df9b73d2d444')
>>> versiontuple('3.6.1+190-df9b73d2d444+20151118')
(3, 6, 1, '190-df9b73d2d444+20151118')
>>> v = '3.6'
>>> versiontuple(v, 2)
(3, 6)
>>> versiontuple(v, 3)
(3, 6, None)
>>> versiontuple(v, 4)
(3, 6, None, None)
"""
if not v:
v = version()
parts = v.split('+', 1)
if len(parts) == 1:
vparts, extra = parts[0], None
else:
vparts, extra = parts
vints = []
for i in vparts.split('.'):
try:
vints.append(int(i))
except ValueError:
break
# (3, 6) -> (3, 6, None)
while len(vints) < 3:
vints.append(None)
if n == 2:
return (vints[0], vints[1])
if n == 3:
return (vints[0], vints[1], vints[2])
if n == 4:
return (vints[0], vints[1], vints[2], extra)
# used by parsedate
defaultdateformats = (
'%Y-%m-%d %H:%M:%S',
'%Y-%m-%d %I:%M:%S%p',
'%Y-%m-%d %H:%M',
'%Y-%m-%d %I:%M%p',
'%Y-%m-%d',
'%m-%d',
'%m/%d',
'%m/%d/%y',
'%m/%d/%Y',
'%a %b %d %H:%M:%S %Y',
'%a %b %d %I:%M:%S%p %Y',
'%a, %d %b %Y %H:%M:%S', # GNU coreutils "/bin/date --rfc-2822"
'%b %d %H:%M:%S %Y',
'%b %d %I:%M:%S%p %Y',
'%b %d %H:%M:%S',
'%b %d %I:%M:%S%p',
'%b %d %H:%M',
'%b %d %I:%M%p',
'%b %d %Y',
'%b %d',
'%H:%M:%S',
'%I:%M:%S%p',
'%H:%M',
'%I:%M%p',
)
extendeddateformats = defaultdateformats + (
"%Y",
"%Y-%m",
"%b",
"%b %Y",
)
def cachefunc(func):
'''cache the result of function calls'''
# XXX doesn't handle keywords args
if func.func_code.co_argcount == 0:
cache = []
def f():
if len(cache) == 0:
cache.append(func())
return cache[0]
return f
cache = {}
if func.func_code.co_argcount == 1:
# we gain a small amount of time because
# we don't need to pack/unpack the list
def f(arg):
if arg not in cache:
cache[arg] = func(arg)
return cache[arg]
else:
def f(*args):
if args not in cache:
cache[args] = func(*args)
return cache[args]
return f
class sortdict(dict):
'''a simple sorted dictionary'''
def __init__(self, data=None):
self._list = []
if data:
self.update(data)
def copy(self):
return sortdict(self)
def __setitem__(self, key, val):
if key in self:
self._list.remove(key)
self._list.append(key)
dict.__setitem__(self, key, val)
def __iter__(self):
return self._list.__iter__()
def update(self, src):
if isinstance(src, dict):
src = src.iteritems()
for k, v in src:
self[k] = v
def clear(self):
dict.clear(self)
self._list = []
def items(self):
return [(k, self[k]) for k in self._list]
def __delitem__(self, key):
dict.__delitem__(self, key)
self._list.remove(key)
def pop(self, key, *args, **kwargs):
dict.pop(self, key, *args, **kwargs)
try:
self._list.remove(key)
except ValueError:
pass
def keys(self):
return self._list
def iterkeys(self):
return self._list.__iter__()
def iteritems(self):
for k in self._list:
yield k, self[k]
def insert(self, index, key, val):
self._list.insert(index, key)
dict.__setitem__(self, key, val)
class _lrucachenode(object):
"""A node in a doubly linked list.
Holds a reference to nodes on either side as well as a key-value
pair for the dictionary entry.
"""
__slots__ = ('next', 'prev', 'key', 'value')
def __init__(self):
self.next = None
self.prev = None
self.key = _notset
self.value = None
def markempty(self):
"""Mark the node as emptied."""
self.key = _notset
class lrucachedict(object):
"""Dict that caches most recent accesses and sets.
The dict consists of an actual backing dict - indexed by original
key - and a doubly linked circular list defining the order of entries in
the cache.
The head node is the newest entry in the cache. If the cache is full,
we recycle head.prev and make it the new head. Cache accesses result in
the node being moved to before the existing head and being marked as the
new head node.
NOTE: construction of this class doesn't scale well if the cache size
is in the thousands. Avoid creating hundreds or thousands of instances
with large capacities.
"""
def __init__(self, max):
self._cache = {}
self._head = head = _lrucachenode()
head.prev = head
head.next = head
self._size = 1
self._capacity = max
def __len__(self):
return len(self._cache)
def __contains__(self, k):
return k in self._cache
def __iter__(self):
# We don't have to iterate in cache order, but why not.
n = self._head
for i in range(len(self._cache)):
yield n.key
n = n.next
def __getitem__(self, k):
node = self._cache[k]
self._movetohead(node)
return node.value
def __setitem__(self, k, v):
node = self._cache.get(k)
# Replace existing value and mark as newest.
if node is not None:
node.value = v
self._movetohead(node)
return
if self._size < self._capacity:
node = self._addcapacity()
else:
# Grab the last/oldest item.
node = self._head.prev
# At capacity. Kill the old entry.
if node.key is not _notset:
del self._cache[node.key]
node.key = k
node.value = v
self._cache[k] = node
# And mark it as newest entry. No need to adjust order since it
# is already self._head.prev.
self._head = node
def __delitem__(self, k):
node = self._cache.pop(k)
node.markempty()
# Temporarily mark as newest item before re-adjusting head to make
# this node the oldest item.
self._movetohead(node)
self._head = node.next
# Additional dict methods.
def get(self, k, default=None):
try:
return self._cache[k]
except KeyError:
return default
def clear(self):
n = self._head
while n.key is not _notset:
n.markempty()
n = n.next
self._cache.clear()
def _movetohead(self, node):
"""Mark a node as the newest, making it the new head.
When a node is accessed, it becomes the freshest entry in the LRU
list, which is denoted by self._head.
Visually, let's make ``N`` the new head node (* denotes head):
previous/oldest <-> head <-> next/next newest
----<->--- A* ---<->-----
| |
E <-> D <-> N <-> C <-> B
To:
----<->--- N* ---<->-----
| |
E <-> D <-> C <-> B <-> A
This requires the following moves:
C.next = D (node.prev.next = node.next)
D.prev = C (node.next.prev = node.prev)
E.next = N (head.prev.next = node)
N.prev = E (node.prev = head.prev)
N.next = A (node.next = head)
A.prev = N (head.prev = node)
"""
head = self._head
# C.next = D
node.prev.next = node.next
# D.prev = C
node.next.prev = node.prev
# N.prev = E
node.prev = head.prev
# N.next = A
# It is tempting to do just "head" here, however if node is
# adjacent to head, this will do bad things.
node.next = head.prev.next
# E.next = N
node.next.prev = node
# A.prev = N
node.prev.next = node
self._head = node
def _addcapacity(self):
"""Add a node to the circular linked list.
The new node is inserted before the head node.
"""
head = self._head
node = _lrucachenode()
head.prev.next = node
node.prev = head.prev
node.next = head
head.prev = node
self._size += 1
return node
def lrucachefunc(func):
'''cache most recent results of function calls'''
cache = {}
order = collections.deque()
if func.func_code.co_argcount == 1:
def f(arg):
if arg not in cache:
if len(cache) > 20:
del cache[order.popleft()]
cache[arg] = func(arg)
else:
order.remove(arg)
order.append(arg)
return cache[arg]
else:
def f(*args):
if args not in cache:
if len(cache) > 20:
del cache[order.popleft()]
cache[args] = func(*args)
else:
order.remove(args)
order.append(args)
return cache[args]
return f
class propertycache(object):
def __init__(self, func):
self.func = func
self.name = func.__name__
def __get__(self, obj, type=None):
result = self.func(obj)
self.cachevalue(obj, result)
return result
def cachevalue(self, obj, value):
# __dict__ assignment required to bypass __setattr__ (eg: repoview)
obj.__dict__[self.name] = value
def pipefilter(s, cmd):
'''filter string S through command CMD, returning its output'''
p = subprocess.Popen(cmd, shell=True, close_fds=closefds,
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
pout, perr = p.communicate(s)
return pout
def tempfilter(s, cmd):
'''filter string S through a pair of temporary files with CMD.
CMD is used as a template to create the real command to be run,
with the strings INFILE and OUTFILE replaced by the real names of
the temporary files generated.'''
inname, outname = None, None
try:
infd, inname = tempfile.mkstemp(prefix='hg-filter-in-')
fp = os.fdopen(infd, 'wb')
fp.write(s)
fp.close()
outfd, outname = tempfile.mkstemp(prefix='hg-filter-out-')
os.close(outfd)
cmd = cmd.replace('INFILE', inname)
cmd = cmd.replace('OUTFILE', outname)
code = os.system(cmd)
if sys.platform == 'OpenVMS' and code & 1:
code = 0
if code:
raise Abort(_("command '%s' failed: %s") %
(cmd, explainexit(code)))
fp = open(outname, 'rb')
r = fp.read()
fp.close()
return r
finally:
try:
if inname:
os.unlink(inname)
except OSError:
pass
try:
if outname:
os.unlink(outname)
except OSError:
pass
filtertable = {
'tempfile:': tempfilter,
'pipe:': pipefilter,
}
def filter(s, cmd):
"filter a string through a command that transforms its input to its output"
for name, fn in filtertable.iteritems():
if cmd.startswith(name):
return fn(s, cmd[len(name):].lstrip())
return pipefilter(s, cmd)
def binary(s):
"""return true if a string is binary data"""
return bool(s and '\0' in s)
def increasingchunks(source, min=1024, max=65536):
'''return no less than min bytes per chunk while data remains,
doubling min after each chunk until it reaches max'''
def log2(x):
if not x:
return 0
i = 0
while x:
x >>= 1
i += 1
return i - 1
buf = []
blen = 0
for chunk in source:
buf.append(chunk)
blen += len(chunk)
if blen >= min:
if min < max:
min = min << 1
nmin = 1 << log2(blen)
if nmin > min:
min = nmin
if min > max:
min = max
yield ''.join(buf)
blen = 0
buf = []
if buf:
yield ''.join(buf)
Abort = error.Abort
def always(fn):
return True
def never(fn):
return False
def nogc(func):
"""disable garbage collector
Python's garbage collector triggers a GC each time a certain number of
container objects (the number being defined by gc.get_threshold()) are
allocated even when marked not to be tracked by the collector. Tracking has
no effect on when GCs are triggered, only on what objects the GC looks
into. As a workaround, disable GC while building complex (huge)
containers.
This garbage collector issue have been fixed in 2.7.
"""
def wrapper(*args, **kwargs):
gcenabled = gc.isenabled()
gc.disable()
try:
return func(*args, **kwargs)
finally:
if gcenabled:
gc.enable()
return wrapper
def pathto(root, n1, n2):
'''return the relative path from one place to another.
root should use os.sep to separate directories
n1 should use os.sep to separate directories
n2 should use "/" to separate directories
returns an os.sep-separated path.
If n1 is a relative path, it's assumed it's
relative to root.
n2 should always be relative to root.
'''
if not n1:
return localpath(n2)
if os.path.isabs(n1):
if os.path.splitdrive(root)[0] != os.path.splitdrive(n1)[0]:
return os.path.join(root, localpath(n2))
n2 = '/'.join((pconvert(root), n2))
a, b = splitpath(n1), n2.split('/')
a.reverse()
b.reverse()
while a and b and a[-1] == b[-1]:
a.pop()
b.pop()
b.reverse()
return os.sep.join((['..'] * len(a)) + b) or '.'
def mainfrozen():
"""return True if we are a frozen executable.
The code supports py2exe (most common, Windows only) and tools/freeze
(portable, not much used).
"""
return (safehasattr(sys, "frozen") or # new py2exe
safehasattr(sys, "importers") or # old py2exe
imp.is_frozen("__main__")) # tools/freeze
# the location of data files matching the source code
if mainfrozen():
# executable version (py2exe) doesn't support __file__
datapath = os.path.dirname(sys.executable)
else:
datapath = os.path.dirname(__file__)
i18n.setdatapath(datapath)
_hgexecutable = None
def hgexecutable():
"""return location of the 'hg' executable.
Defaults to $HG or 'hg' in the search path.
"""
if _hgexecutable is None:
hg = os.environ.get('HG')
mainmod = sys.modules['__main__']
if hg:
_sethgexecutable(hg)
elif mainfrozen():
_sethgexecutable(sys.executable)
elif os.path.basename(getattr(mainmod, '__file__', '')) == 'hg':
_sethgexecutable(mainmod.__file__)
else:
exe = findexe('hg') or os.path.basename(sys.argv[0])
_sethgexecutable(exe)
return _hgexecutable
def _sethgexecutable(path):
"""set location of the 'hg' executable"""
global _hgexecutable
_hgexecutable = path
def _isstdout(f):
fileno = getattr(f, 'fileno', None)
return fileno and fileno() == sys.__stdout__.fileno()
def system(cmd, environ=None, cwd=None, onerr=None, errprefix=None, out=None):
'''enhanced shell command execution.
run with environment maybe modified, maybe in different dir.
if command fails and onerr is None, return status, else raise onerr
object as exception.
if out is specified, it is assumed to be a file-like object that has a
write() method. stdout and stderr will be redirected to out.'''
if environ is None:
environ = {}
try:
sys.stdout.flush()
except Exception:
pass
def py2shell(val):
'convert python object into string that is useful to shell'
if val is None or val is False:
return '0'
if val is True:
return '1'
return str(val)
origcmd = cmd
cmd = quotecommand(cmd)
if sys.platform == 'plan9' and (sys.version_info[0] == 2
and sys.version_info[1] < 7):
# subprocess kludge to work around issues in half-baked Python
# ports, notably bichued/python:
if not cwd is None:
os.chdir(cwd)
rc = os.system(cmd)
else:
env = dict(os.environ)
env.update((k, py2shell(v)) for k, v in environ.iteritems())
env['HG'] = hgexecutable()
if out is None or _isstdout(out):
rc = subprocess.call(cmd, shell=True, close_fds=closefds,
env=env, cwd=cwd)
else:
proc = subprocess.Popen(cmd, shell=True, close_fds=closefds,
env=env, cwd=cwd, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
while True:
line = proc.stdout.readline()
if not line:
break
out.write(line)
proc.wait()
rc = proc.returncode
if sys.platform == 'OpenVMS' and rc & 1:
rc = 0
if rc and onerr:
errmsg = '%s %s' % (os.path.basename(origcmd.split(None, 1)[0]),
explainexit(rc)[0])
if errprefix:
errmsg = '%s: %s' % (errprefix, errmsg)
raise onerr(errmsg)
return rc
def checksignature(func):
'''wrap a function with code to check for calling errors'''
def check(*args, **kwargs):
try:
return func(*args, **kwargs)
except TypeError:
if len(traceback.extract_tb(sys.exc_info()[2])) == 1:
raise error.SignatureError
raise
return check
def copyfile(src, dest, hardlink=False, copystat=False):
'''copy a file, preserving mode and optionally other stat info like
atime/mtime'''
if os.path.lexists(dest):
unlink(dest)
# hardlinks are problematic on CIFS, quietly ignore this flag
# until we find a way to work around it cleanly (issue4546)
if False and hardlink:
try:
oslink(src, dest)
return
except (IOError, OSError):
pass # fall back to normal copy
if os.path.islink(src):
os.symlink(os.readlink(src), dest)
# copytime is ignored for symlinks, but in general copytime isn't needed
# for them anyway
else:
try:
shutil.copyfile(src, dest)
if copystat:
# copystat also copies mode
shutil.copystat(src, dest)
else:
shutil.copymode(src, dest)
except shutil.Error as inst:
raise Abort(str(inst))
def copyfiles(src, dst, hardlink=None, progress=lambda t, pos: None):
"""Copy a directory tree using hardlinks if possible."""
num = 0
if hardlink is None:
hardlink = (os.stat(src).st_dev ==
os.stat(os.path.dirname(dst)).st_dev)
if hardlink:
topic = _('linking')
else:
topic = _('copying')
if os.path.isdir(src):
os.mkdir(dst)
for name, kind in osutil.listdir(src):
srcname = os.path.join(src, name)
dstname = os.path.join(dst, name)
def nprog(t, pos):
if pos is not None:
return progress(t, pos + num)
hardlink, n = copyfiles(srcname, dstname, hardlink, progress=nprog)
num += n
else:
if hardlink:
try:
oslink(src, dst)
except (IOError, OSError):
hardlink = False
shutil.copy(src, dst)
else:
shutil.copy(src, dst)
num += 1
progress(topic, num)
progress(topic, None)
return hardlink, num
_winreservednames = '''con prn aux nul
com1 com2 com3 com4 com5 com6 com7 com8 com9
lpt1 lpt2 lpt3 lpt4 lpt5 lpt6 lpt7 lpt8 lpt9'''.split()
_winreservedchars = ':*?"<>|'
def checkwinfilename(path):
r'''Check that the base-relative path is a valid filename on Windows.
Returns None if the path is ok, or a UI string describing the problem.
>>> checkwinfilename("just/a/normal/path")
>>> checkwinfilename("foo/bar/con.xml")
"filename contains 'con', which is reserved on Windows"
>>> checkwinfilename("foo/con.xml/bar")
"filename contains 'con', which is reserved on Windows"
>>> checkwinfilename("foo/bar/xml.con")
>>> checkwinfilename("foo/bar/AUX/bla.txt")
"filename contains 'AUX', which is reserved on Windows"
>>> checkwinfilename("foo/bar/bla:.txt")
"filename contains ':', which is reserved on Windows"
>>> checkwinfilename("foo/bar/b\07la.txt")
"filename contains '\\x07', which is invalid on Windows"
>>> checkwinfilename("foo/bar/bla ")
"filename ends with ' ', which is not allowed on Windows"
>>> checkwinfilename("../bar")
>>> checkwinfilename("foo\\")
"filename ends with '\\', which is invalid on Windows"
>>> checkwinfilename("foo\\/bar")
"directory name ends with '\\', which is invalid on Windows"
'''
if path.endswith('\\'):
return _("filename ends with '\\', which is invalid on Windows")
if '\\/' in path:
return _("directory name ends with '\\', which is invalid on Windows")
for n in path.replace('\\', '/').split('/'):
if not n:
continue
for c in n:
if c in _winreservedchars:
return _("filename contains '%s', which is reserved "
"on Windows") % c
if ord(c) <= 31:
return _("filename contains %r, which is invalid "
"on Windows") % c
base = n.split('.')[0]
if base and base.lower() in _winreservednames:
return _("filename contains '%s', which is reserved "
"on Windows") % base
t = n[-1]
if t in '. ' and n not in '..':
return _("filename ends with '%s', which is not allowed "
"on Windows") % t
if os.name == 'nt':
checkosfilename = checkwinfilename
else:
checkosfilename = platform.checkosfilename
def makelock(info, pathname):
try:
return os.symlink(info, pathname)
except OSError as why:
if why.errno == errno.EEXIST:
raise
except AttributeError: # no symlink in os
pass
ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
os.write(ld, info)
os.close(ld)
def readlock(pathname):
try:
return os.readlink(pathname)
except OSError as why:
if why.errno not in (errno.EINVAL, errno.ENOSYS):
raise
except AttributeError: # no symlink in os
pass
fp = posixfile(pathname)
r = fp.read()
fp.close()
return r
def fstat(fp):
'''stat file object that may not have fileno method.'''
try:
return os.fstat(fp.fileno())
except AttributeError:
return os.stat(fp.name)
# File system features
def checkcase(path):
"""
Return true if the given path is on a case-sensitive filesystem
Requires a path (like /foo/.hg) ending with a foldable final
directory component.
"""
s1 = os.lstat(path)
d, b = os.path.split(path)
b2 = b.upper()
if b == b2:
b2 = b.lower()
if b == b2:
return True # no evidence against case sensitivity
p2 = os.path.join(d, b2)
try:
s2 = os.lstat(p2)
if s2 == s1:
return False
return True
except OSError:
return True
try:
import re2
_re2 = None
except ImportError:
_re2 = False
class _re(object):
def _checkre2(self):
global _re2
try:
# check if match works, see issue3964
_re2 = bool(re2.match(r'\[([^\[]+)\]', '[ui]'))
except ImportError:
_re2 = False
def compile(self, pat, flags=0):
'''Compile a regular expression, using re2 if possible
For best performance, use only re2-compatible regexp features. The
only flags from the re module that are re2-compatible are
IGNORECASE and MULTILINE.'''
if _re2 is None:
self._checkre2()
if _re2 and (flags & ~(remod.IGNORECASE | remod.MULTILINE)) == 0:
if flags & remod.IGNORECASE:
pat = '(?i)' + pat
if flags & remod.MULTILINE:
pat = '(?m)' + pat
try:
return re2.compile(pat)
except re2.error:
pass
return remod.compile(pat, flags)
@propertycache
def escape(self):
'''Return the version of escape corresponding to self.compile.
This is imperfect because whether re2 or re is used for a particular
function depends on the flags, etc, but it's the best we can do.
'''
global _re2
if _re2 is None:
self._checkre2()
if _re2:
return re2.escape
else:
return remod.escape
re = _re()
_fspathcache = {}
def fspath(name, root):
'''Get name in the case stored in the filesystem
The name should be relative to root, and be normcase-ed for efficiency.
Note that this function is unnecessary, and should not be
called, for case-sensitive filesystems (simply because it's expensive).
The root should be normcase-ed, too.
'''
def _makefspathcacheentry(dir):
return dict((normcase(n), n) for n in os.listdir(dir))
seps = os.sep
if os.altsep:
seps = seps + os.altsep
# Protect backslashes. This gets silly very quickly.
seps.replace('\\','\\\\')
pattern = remod.compile(r'([^%s]+)|([%s]+)' % (seps, seps))
dir = os.path.normpath(root)
result = []
for part, sep in pattern.findall(name):
if sep:
result.append(sep)
continue
if dir not in _fspathcache:
_fspathcache[dir] = _makefspathcacheentry(dir)
contents = _fspathcache[dir]
found = contents.get(part)
if not found:
# retry "once per directory" per "dirstate.walk" which
# may take place for each patches of "hg qpush", for example
_fspathcache[dir] = contents = _makefspathcacheentry(dir)
found = contents.get(part)
result.append(found or part)
dir = os.path.join(dir, part)
return ''.join(result)
def checknlink(testfile):
'''check whether hardlink count reporting works properly'''
# testfile may be open, so we need a separate file for checking to
# work around issue2543 (or testfile may get lost on Samba shares)
f1 = testfile + ".hgtmp1"
if os.path.lexists(f1):
return False
try:
posixfile(f1, 'w').close()
except IOError:
return False
f2 = testfile + ".hgtmp2"
fd = None
try:
oslink(f1, f2)
# nlinks() may behave differently for files on Windows shares if
# the file is open.
fd = posixfile(f2)
return nlinks(f2) > 1
except OSError:
return False
finally:
if fd is not None:
fd.close()
for f in (f1, f2):
try:
os.unlink(f)
except OSError:
pass
def endswithsep(path):
'''Check path ends with os.sep or os.altsep.'''
return path.endswith(os.sep) or os.altsep and path.endswith(os.altsep)
def splitpath(path):
'''Split path by os.sep.
Note that this function does not use os.altsep because this is
an alternative of simple "xxx.split(os.sep)".
It is recommended to use os.path.normpath() before using this
function if need.'''
return path.split(os.sep)
def gui():
'''Are we running in a GUI?'''
if sys.platform == 'darwin':
if 'SSH_CONNECTION' in os.environ:
# handle SSH access to a box where the user is logged in
return False
elif getattr(osutil, 'isgui', None):
# check if a CoreGraphics session is available
return osutil.isgui()
else:
# pure build; use a safe default
return True
else:
return os.name == "nt" or os.environ.get("DISPLAY")
def mktempcopy(name, emptyok=False, createmode=None):
"""Create a temporary file with the same contents from name
The permission bits are copied from the original file.
If the temporary file is going to be truncated immediately, you
can use emptyok=True as an optimization.
Returns the name of the temporary file.
"""
d, fn = os.path.split(name)
fd, temp = tempfile.mkstemp(prefix='.%s-' % fn, dir=d)
os.close(fd)
# Temporary files are created with mode 0600, which is usually not
# what we want. If the original file already exists, just copy
# its mode. Otherwise, manually obey umask.
copymode(name, temp, createmode)
if emptyok:
return temp
try:
try:
ifp = posixfile(name, "rb")
except IOError as inst:
if inst.errno == errno.ENOENT:
return temp
if not getattr(inst, 'filename', None):
inst.filename = name
raise
ofp = posixfile(temp, "wb")
for chunk in filechunkiter(ifp):
ofp.write(chunk)
ifp.close()
ofp.close()
except: # re-raises
try: os.unlink(temp)
except OSError: pass
raise
return temp
class atomictempfile(object):
'''writable file object that atomically updates a file
All writes will go to a temporary copy of the original file. Call
close() when you are done writing, and atomictempfile will rename
the temporary copy to the original name, making the changes
visible. If the object is destroyed without being closed, all your
writes are discarded.
'''
def __init__(self, name, mode='w+b', createmode=None):
self.__name = name # permanent name
self._tempname = mktempcopy(name, emptyok=('w' in mode),
createmode=createmode)
self._fp = posixfile(self._tempname, mode)
# delegated methods
self.write = self._fp.write
self.seek = self._fp.seek
self.tell = self._fp.tell
self.fileno = self._fp.fileno
def close(self):
if not self._fp.closed:
self._fp.close()
rename(self._tempname, localpath(self.__name))
def discard(self):
if not self._fp.closed:
try:
os.unlink(self._tempname)
except OSError:
pass
self._fp.close()
def __del__(self):
if safehasattr(self, '_fp'): # constructor actually did something
self.discard()
def makedirs(name, mode=None, notindexed=False):
"""recursive directory creation with parent mode inheritance"""
try:
makedir(name, notindexed)
except OSError as err:
if err.errno == errno.EEXIST:
return
if err.errno != errno.ENOENT or not name:
raise
parent = os.path.dirname(os.path.abspath(name))
if parent == name:
raise
makedirs(parent, mode, notindexed)
makedir(name, notindexed)
if mode is not None:
os.chmod(name, mode)
def ensuredirs(name, mode=None, notindexed=False):
"""race-safe recursive directory creation
Newly created directories are marked as "not to be indexed by
the content indexing service", if ``notindexed`` is specified
for "write" mode access.
"""
if os.path.isdir(name):
return
parent = os.path.dirname(os.path.abspath(name))
if parent != name:
ensuredirs(parent, mode, notindexed)
try:
makedir(name, notindexed)
except OSError as err:
if err.errno == errno.EEXIST and os.path.isdir(name):
# someone else seems to have won a directory creation race
return
raise
if mode is not None:
os.chmod(name, mode)
def readfile(path):
fp = open(path, 'rb')
try:
return fp.read()
finally:
fp.close()
def writefile(path, text):
fp = open(path, 'wb')
try:
fp.write(text)
finally:
fp.close()
def appendfile(path, text):
fp = open(path, 'ab')
try:
fp.write(text)
finally:
fp.close()
class chunkbuffer(object):
"""Allow arbitrary sized chunks of data to be efficiently read from an
iterator over chunks of arbitrary size."""
def __init__(self, in_iter):
"""in_iter is the iterator that's iterating over the input chunks.
targetsize is how big a buffer to try to maintain."""
def splitbig(chunks):
for chunk in chunks:
if len(chunk) > 2**20:
pos = 0
while pos < len(chunk):
end = pos + 2 ** 18
yield chunk[pos:end]
pos = end
else:
yield chunk
self.iter = splitbig(in_iter)
self._queue = collections.deque()
self._chunkoffset = 0
def read(self, l=None):
"""Read L bytes of data from the iterator of chunks of data.
Returns less than L bytes if the iterator runs dry.
If size parameter is omitted, read everything"""
if l is None:
return ''.join(self.iter)
left = l
buf = []
queue = self._queue
while left > 0:
# refill the queue
if not queue:
target = 2**18
for chunk in self.iter:
queue.append(chunk)
target -= len(chunk)
if target <= 0:
break
if not queue:
break
# The easy way to do this would be to queue.popleft(), modify the
# chunk (if necessary), then queue.appendleft(). However, for cases
# where we read partial chunk content, this incurs 2 dequeue
# mutations and creates a new str for the remaining chunk in the
# queue. Our code below avoids this overhead.
chunk = queue[0]
chunkl = len(chunk)
offset = self._chunkoffset
# Use full chunk.
if offset == 0 and left >= chunkl:
left -= chunkl
queue.popleft()
buf.append(chunk)
# self._chunkoffset remains at 0.
continue
chunkremaining = chunkl - offset
# Use all of unconsumed part of chunk.
if left >= chunkremaining:
left -= chunkremaining
queue.popleft()
# offset == 0 is enabled by block above, so this won't merely
# copy via ``chunk[0:]``.
buf.append(chunk[offset:])
self._chunkoffset = 0
# Partial chunk needed.
else:
buf.append(chunk[offset:offset + left])
self._chunkoffset += left
left -= chunkremaining
return ''.join(buf)
def filechunkiter(f, size=65536, limit=None):
"""Create a generator that produces the data in the file size
(default 65536) bytes at a time, up to optional limit (default is
to read all data). Chunks may be less than size bytes if the
chunk is the last chunk in the file, or the file is a socket or
some other type of file that sometimes reads less data than is
requested."""
assert size >= 0
assert limit is None or limit >= 0
while True:
if limit is None:
nbytes = size
else:
nbytes = min(limit, size)
s = nbytes and f.read(nbytes)
if not s:
break
if limit:
limit -= len(s)
yield s
def makedate(timestamp=None):
'''Return a unix timestamp (or the current time) as a (unixtime,
offset) tuple based off the local timezone.'''
if timestamp is None:
timestamp = time.time()
if timestamp < 0:
hint = _("check your clock")
raise Abort(_("negative timestamp: %d") % timestamp, hint=hint)
delta = (datetime.datetime.utcfromtimestamp(timestamp) -
datetime.datetime.fromtimestamp(timestamp))
tz = delta.days * 86400 + delta.seconds
return timestamp, tz
def datestr(date=None, format='%a %b %d %H:%M:%S %Y %1%2'):
"""represent a (unixtime, offset) tuple as a localized time.
unixtime is seconds since the epoch, and offset is the time zone's
number of seconds away from UTC. if timezone is false, do not
append time zone to string."""
t, tz = date or makedate()
if t < 0:
t = 0 # time.gmtime(lt) fails on Windows for lt < -43200
tz = 0
if "%1" in format or "%2" in format or "%z" in format:
sign = (tz > 0) and "-" or "+"
minutes = abs(tz) // 60
q, r = divmod(minutes, 60)
format = format.replace("%z", "%1%2")
format = format.replace("%1", "%c%02d" % (sign, q))
format = format.replace("%2", "%02d" % r)
try:
t = time.gmtime(float(t) - tz)
except ValueError:
# time was out of range
t = time.gmtime(sys.maxint)
s = time.strftime(format, t)
return s
def shortdate(date=None):
"""turn (timestamp, tzoff) tuple into iso 8631 date."""
return datestr(date, format='%Y-%m-%d')
def parsetimezone(tz):
"""parse a timezone string and return an offset integer"""
if tz[0] in "+-" and len(tz) == 5 and tz[1:].isdigit():
sign = (tz[0] == "+") and 1 or -1
hours = int(tz[1:3])
minutes = int(tz[3:5])
return -sign * (hours * 60 + minutes) * 60
if tz == "GMT" or tz == "UTC":
return 0
return None
def strdate(string, format, defaults=[]):
"""parse a localized time string and return a (unixtime, offset) tuple.
if the string cannot be parsed, ValueError is raised."""
# NOTE: unixtime = localunixtime + offset
offset, date = parsetimezone(string.split()[-1]), string
if offset is not None:
date = " ".join(string.split()[:-1])
# add missing elements from defaults
usenow = False # default to using biased defaults
for part in ("S", "M", "HI", "d", "mb", "yY"): # decreasing specificity
found = [True for p in part if ("%"+p) in format]
if not found:
date += "@" + defaults[part][usenow]
format += "@%" + part[0]
else:
# We've found a specific time element, less specific time
# elements are relative to today
usenow = True
timetuple = time.strptime(date, format)
localunixtime = int(calendar.timegm(timetuple))
if offset is None:
# local timezone
unixtime = int(time.mktime(timetuple))
offset = unixtime - localunixtime
else:
unixtime = localunixtime + offset
return unixtime, offset
def parsedate(date, formats=None, bias=None):
"""parse a localized date/time and return a (unixtime, offset) tuple.
The date may be a "unixtime offset" string or in one of the specified
formats. If the date already is a (unixtime, offset) tuple, it is returned.
>>> parsedate(' today ') == parsedate(\
datetime.date.today().strftime('%b %d'))
True
>>> parsedate( 'yesterday ') == parsedate((datetime.date.today() -\
datetime.timedelta(days=1)\
).strftime('%b %d'))
True
>>> now, tz = makedate()
>>> strnow, strtz = parsedate('now')
>>> (strnow - now) < 1
True
>>> tz == strtz
True
"""
if bias is None:
bias = {}
if not date:
return 0, 0
if isinstance(date, tuple) and len(date) == 2:
return date
if not formats:
formats = defaultdateformats
date = date.strip()
if date == 'now' or date == _('now'):
return makedate()
if date == 'today' or date == _('today'):
date = datetime.date.today().strftime('%b %d')
elif date == 'yesterday' or date == _('yesterday'):
date = (datetime.date.today() -
datetime.timedelta(days=1)).strftime('%b %d')
try:
when, offset = map(int, date.split(' '))
except ValueError:
# fill out defaults
now = makedate()
defaults = {}
for part in ("d", "mb", "yY", "HI", "M", "S"):
# this piece is for rounding the specific end of unknowns
b = bias.get(part)
if b is None:
if part[0] in "HMS":
b = "00"
else:
b = "0"
# this piece is for matching the generic end to today's date
n = datestr(now, "%" + part[0])
defaults[part] = (b, n)
for format in formats:
try:
when, offset = strdate(date, format, defaults)
except (ValueError, OverflowError):
pass
else:
break
else:
raise Abort(_('invalid date: %r') % date)
# validate explicit (probably user-specified) date and
# time zone offset. values must fit in signed 32 bits for
# current 32-bit linux runtimes. timezones go from UTC-12
# to UTC+14
if abs(when) > 0x7fffffff:
raise Abort(_('date exceeds 32 bits: %d') % when)
if when < 0:
raise Abort(_('negative date value: %d') % when)
if offset < -50400 or offset > 43200:
raise Abort(_('impossible time zone offset: %d') % offset)
return when, offset
def matchdate(date):
"""Return a function that matches a given date match specifier
Formats include:
'{date}' match a given date to the accuracy provided
'<{date}' on or before a given date
'>{date}' on or after a given date
>>> p1 = parsedate("10:29:59")
>>> p2 = parsedate("10:30:00")
>>> p3 = parsedate("10:30:59")
>>> p4 = parsedate("10:31:00")
>>> p5 = parsedate("Sep 15 10:30:00 1999")
>>> f = matchdate("10:30")
>>> f(p1[0])
False
>>> f(p2[0])
True
>>> f(p3[0])
True
>>> f(p4[0])
False
>>> f(p5[0])
False
"""
def lower(date):
d = {'mb': "1", 'd': "1"}
return parsedate(date, extendeddateformats, d)[0]
def upper(date):
d = {'mb': "12", 'HI': "23", 'M': "59", 'S': "59"}
for days in ("31", "30", "29"):
try:
d["d"] = days
return parsedate(date, extendeddateformats, d)[0]
except Abort:
pass
d["d"] = "28"
return parsedate(date, extendeddateformats, d)[0]
date = date.strip()
if not date:
raise Abort(_("dates cannot consist entirely of whitespace"))
elif date[0] == "<":
if not date[1:]:
raise Abort(_("invalid day spec, use '<DATE'"))
when = upper(date[1:])
return lambda x: x <= when
elif date[0] == ">":
if not date[1:]:
raise Abort(_("invalid day spec, use '>DATE'"))
when = lower(date[1:])
return lambda x: x >= when
elif date[0] == "-":
try:
days = int(date[1:])
except ValueError:
raise Abort(_("invalid day spec: %s") % date[1:])
if days < 0:
raise Abort(_('%s must be nonnegative (see "hg help dates")')
% date[1:])
when = makedate()[0] - days * 3600 * 24
return lambda x: x >= when
elif " to " in date:
a, b = date.split(" to ")
start, stop = lower(a), upper(b)
return lambda x: x >= start and x <= stop
else:
start, stop = lower(date), upper(date)
return lambda x: x >= start and x <= stop
def stringmatcher(pattern):
"""
accepts a string, possibly starting with 're:' or 'literal:' prefix.
returns the matcher name, pattern, and matcher function.
missing or unknown prefixes are treated as literal matches.
helper for tests:
>>> def test(pattern, *tests):
... kind, pattern, matcher = stringmatcher(pattern)
... return (kind, pattern, [bool(matcher(t)) for t in tests])
exact matching (no prefix):
>>> test('abcdefg', 'abc', 'def', 'abcdefg')
('literal', 'abcdefg', [False, False, True])
regex matching ('re:' prefix)
>>> test('re:a.+b', 'nomatch', 'fooadef', 'fooadefbar')
('re', 'a.+b', [False, False, True])
force exact matches ('literal:' prefix)
>>> test('literal:re:foobar', 'foobar', 're:foobar')
('literal', 're:foobar', [False, True])
unknown prefixes are ignored and treated as literals
>>> test('foo:bar', 'foo', 'bar', 'foo:bar')
('literal', 'foo:bar', [False, False, True])
"""
if pattern.startswith('re:'):
pattern = pattern[3:]
try:
regex = remod.compile(pattern)
except remod.error as e:
raise error.ParseError(_('invalid regular expression: %s')
% e)
return 're', pattern, regex.search
elif pattern.startswith('literal:'):
pattern = pattern[8:]
return 'literal', pattern, pattern.__eq__
def shortuser(user):
"""Return a short representation of a user name or email address."""
f = user.find('@')
if f >= 0:
user = user[:f]
f = user.find('<')
if f >= 0:
user = user[f + 1:]
f = user.find(' ')
if f >= 0:
user = user[:f]
f = user.find('.')
if f >= 0:
user = user[:f]
return user
def emailuser(user):
"""Return the user portion of an email address."""
f = user.find('@')
if f >= 0:
user = user[:f]
f = user.find('<')
if f >= 0:
user = user[f + 1:]
return user
def email(author):
'''get email of author.'''
r = author.find('>')
if r == -1:
r = None
return author[author.find('<') + 1:r]
def ellipsis(text, maxlength=400):
"""Trim string to at most maxlength (default: 400) columns in display."""
return encoding.trim(text, maxlength, ellipsis='...')
def unitcountfn(*unittable):
'''return a function that renders a readable count of some quantity'''
def go(count):
for multiplier, divisor, format in unittable:
if count >= divisor * multiplier:
return format % (count / float(divisor))
return unittable[-1][2] % count
return go
bytecount = unitcountfn(
(100, 1 << 30, _('%.0f GB')),
(10, 1 << 30, _('%.1f GB')),
(1, 1 << 30, _('%.2f GB')),
(100, 1 << 20, _('%.0f MB')),
(10, 1 << 20, _('%.1f MB')),
(1, 1 << 20, _('%.2f MB')),
(100, 1 << 10, _('%.0f KB')),
(10, 1 << 10, _('%.1f KB')),
(1, 1 << 10, _('%.2f KB')),
(1, 1, _('%.0f bytes')),
)
def uirepr(s):
# Avoid double backslash in Windows path repr()
return repr(s).replace('\\\\', '\\')
# delay import of textwrap
def MBTextWrapper(**kwargs):
class tw(textwrap.TextWrapper):
"""
Extend TextWrapper for width-awareness.
Neither number of 'bytes' in any encoding nor 'characters' is
appropriate to calculate terminal columns for specified string.
Original TextWrapper implementation uses built-in 'len()' directly,
so overriding is needed to use width information of each characters.
In addition, characters classified into 'ambiguous' width are
treated as wide in East Asian area, but as narrow in other.
This requires use decision to determine width of such characters.
"""
def _cutdown(self, ucstr, space_left):
l = 0
colwidth = encoding.ucolwidth
for i in xrange(len(ucstr)):
l += colwidth(ucstr[i])
if space_left < l:
return (ucstr[:i], ucstr[i:])
return ucstr, ''
# overriding of base class
def _handle_long_word(self, reversed_chunks, cur_line, cur_len, width):
space_left = max(width - cur_len, 1)
if self.break_long_words:
cut, res = self._cutdown(reversed_chunks[-1], space_left)
cur_line.append(cut)
reversed_chunks[-1] = res
elif not cur_line:
cur_line.append(reversed_chunks.pop())
# this overriding code is imported from TextWrapper of Python 2.6
# to calculate columns of string by 'encoding.ucolwidth()'
def _wrap_chunks(self, chunks):
colwidth = encoding.ucolwidth
lines = []
if self.width <= 0:
raise ValueError("invalid width %r (must be > 0)" % self.width)
# Arrange in reverse order so items can be efficiently popped
# from a stack of chucks.
chunks.reverse()
while chunks:
# Start the list of chunks that will make up the current line.
# cur_len is just the length of all the chunks in cur_line.
cur_line = []
cur_len = 0
# Figure out which static string will prefix this line.
if lines:
indent = self.subsequent_indent
else:
indent = self.initial_indent
# Maximum width for this line.
width = self.width - len(indent)
# First chunk on line is whitespace -- drop it, unless this
# is the very beginning of the text (i.e. no lines started yet).
if self.drop_whitespace and chunks[-1].strip() == '' and lines:
del chunks[-1]
while chunks:
l = colwidth(chunks[-1])
# Can at least squeeze this chunk onto the current line.
if cur_len + l <= width:
cur_line.append(chunks.pop())
cur_len += l
# Nope, this line is full.
else:
break
# The current line is full, and the next chunk is too big to
# fit on *any* line (not just this one).
if chunks and colwidth(chunks[-1]) > width:
self._handle_long_word(chunks, cur_line, cur_len, width)
# If the last chunk on this line is all whitespace, drop it.
if (self.drop_whitespace and
cur_line and cur_line[-1].strip() == ''):
del cur_line[-1]
# Convert current line back to a string and store it in list
# of all lines (return value).
if cur_line:
lines.append(indent + ''.join(cur_line))
return lines
global MBTextWrapper
MBTextWrapper = tw
return tw(**kwargs)
def wrap(line, width, initindent='', hangindent=''):
maxindent = max(len(hangindent), len(initindent))
if width <= maxindent:
# adjust for weird terminal size
width = max(78, maxindent + 1)
line = line.decode(encoding.encoding, encoding.encodingmode)
initindent = initindent.decode(encoding.encoding, encoding.encodingmode)
hangindent = hangindent.decode(encoding.encoding, encoding.encodingmode)
wrapper = MBTextWrapper(width=width,
initial_indent=initindent,
subsequent_indent=hangindent)
return wrapper.fill(line).encode(encoding.encoding)
def iterlines(iterator):
for chunk in iterator:
for line in chunk.splitlines():
yield line
def expandpath(path):
return os.path.expanduser(os.path.expandvars(path))
def hgcmd():
"""Return the command used to execute current hg
This is different from hgexecutable() because on Windows we want
to avoid things opening new shell windows like batch files, so we
get either the python call or current executable.
"""
if mainfrozen():
return [sys.executable]
return gethgcmd()
def rundetached(args, condfn):
"""Execute the argument list in a detached process.
condfn is a callable which is called repeatedly and should return
True once the child process is known to have started successfully.
At this point, the child process PID is returned. If the child
process fails to start or finishes before condfn() evaluates to
True, return -1.
"""
# Windows case is easier because the child process is either
# successfully starting and validating the condition or exiting
# on failure. We just poll on its PID. On Unix, if the child
# process fails to start, it will be left in a zombie state until
# the parent wait on it, which we cannot do since we expect a long
# running process on success. Instead we listen for SIGCHLD telling
# us our child process terminated.
terminated = set()
def handler(signum, frame):
terminated.add(os.wait())
prevhandler = None
SIGCHLD = getattr(signal, 'SIGCHLD', None)
if SIGCHLD is not None:
prevhandler = signal.signal(SIGCHLD, handler)
try:
pid = spawndetached(args)
while not condfn():
if ((pid in terminated or not testpid(pid))
and not condfn()):
return -1
time.sleep(0.1)
return pid
finally:
if prevhandler is not None:
signal.signal(signal.SIGCHLD, prevhandler)
def interpolate(prefix, mapping, s, fn=None, escape_prefix=False):
"""Return the result of interpolating items in the mapping into string s.
prefix is a single character string, or a two character string with
a backslash as the first character if the prefix needs to be escaped in
a regular expression.
fn is an optional function that will be applied to the replacement text
just before replacement.
escape_prefix is an optional flag that allows using doubled prefix for
its escaping.
"""
fn = fn or (lambda s: s)
patterns = '|'.join(mapping.keys())
if escape_prefix:
patterns += '|' + prefix
if len(prefix) > 1:
prefix_char = prefix[1:]
else:
prefix_char = prefix
mapping[prefix_char] = prefix_char
r = remod.compile(r'%s(%s)' % (prefix, patterns))
return r.sub(lambda x: fn(mapping[x.group()[1:]]), s)
def getport(port):
"""Return the port for a given network service.
If port is an integer, it's returned as is. If it's a string, it's
looked up using socket.getservbyname(). If there's no matching
service, error.Abort is raised.
"""
try:
return int(port)
except ValueError:
pass
try:
return socket.getservbyname(port)
except socket.error:
raise Abort(_("no port number associated with service '%s'") % port)
_booleans = {'1': True, 'yes': True, 'true': True, 'on': True, 'always': True,
'0': False, 'no': False, 'false': False, 'off': False,
'never': False}
def parsebool(s):
"""Parse s into a boolean.
If s is not a valid boolean, returns None.
"""
return _booleans.get(s.lower(), None)
_hexdig = '0123456789ABCDEFabcdef'
_hextochr = dict((a + b, chr(int(a + b, 16)))
for a in _hexdig for b in _hexdig)
def _urlunquote(s):
"""Decode HTTP/HTML % encoding.
>>> _urlunquote('abc%20def')
'abc def'
"""
res = s.split('%')
# fastpath
if len(res) == 1:
return s
s = res[0]
for item in res[1:]:
try:
s += _hextochr[item[:2]] + item[2:]
except KeyError:
s += '%' + item
except UnicodeDecodeError:
s += unichr(int(item[:2], 16)) + item[2:]
return s
class url(object):
r"""Reliable URL parser.
This parses URLs and provides attributes for the following
components:
<scheme>://<user>:<passwd>@<host>:<port>/<path>?<query>#<fragment>
Missing components are set to None. The only exception is
fragment, which is set to '' if present but empty.
If parsefragment is False, fragment is included in query. If
parsequery is False, query is included in path. If both are
False, both fragment and query are included in path.
See http://www.ietf.org/rfc/rfc2396.txt for more information.
Note that for backward compatibility reasons, bundle URLs do not
take host names. That means 'bundle://../' has a path of '../'.
Examples:
>>> url('http://www.ietf.org/rfc/rfc2396.txt')
<url scheme: 'http', host: 'www.ietf.org', path: 'rfc/rfc2396.txt'>
>>> url('ssh://[::1]:2200//home/joe/repo')
<url scheme: 'ssh', host: '[::1]', port: '2200', path: '/home/joe/repo'>
>>> url('file:///home/joe/repo')
<url scheme: 'file', path: '/home/joe/repo'>
>>> url('file:///c:/temp/foo/')
<url scheme: 'file', path: 'c:/temp/foo/'>
>>> url('bundle:foo')
<url scheme: 'bundle', path: 'foo'>
>>> url('bundle://../foo')
<url scheme: 'bundle', path: '../foo'>
>>> url(r'c:\foo\bar')
<url path: 'c:\\foo\\bar'>
>>> url(r'\\blah\blah\blah')
<url path: '\\\\blah\\blah\\blah'>
>>> url(r'\\blah\blah\blah#baz')
<url path: '\\\\blah\\blah\\blah', fragment: 'baz'>
>>> url(r'file:///C:\users\me')
<url scheme: 'file', path: 'C:\\users\\me'>
Authentication credentials:
>>> url('ssh://joe:xyz@x/repo')
<url scheme: 'ssh', user: 'joe', passwd: 'xyz', host: 'x', path: 'repo'>
>>> url('ssh://joe@x/repo')
<url scheme: 'ssh', user: 'joe', host: 'x', path: 'repo'>
Query strings and fragments:
>>> url('http://host/a?b#c')
<url scheme: 'http', host: 'host', path: 'a', query: 'b', fragment: 'c'>
>>> url('http://host/a?b#c', parsequery=False, parsefragment=False)
<url scheme: 'http', host: 'host', path: 'a?b#c'>
"""
_safechars = "!~*'()+"
_safepchars = "/!~*'()+:\\"
_matchscheme = remod.compile(r'^[a-zA-Z0-9+.\-]+:').match
def __init__(self, path, parsequery=True, parsefragment=True):
# We slowly chomp away at path until we have only the path left
self.scheme = self.user = self.passwd = self.host = None
self.port = self.path = self.query = self.fragment = None
self._localpath = True
self._hostport = ''
self._origpath = path
if parsefragment and '#' in path:
path, self.fragment = path.split('#', 1)
if not path:
path = None
# special case for Windows drive letters and UNC paths
if hasdriveletter(path) or path.startswith(r'\\'):
self.path = path
return
# For compatibility reasons, we can't handle bundle paths as
# normal URLS
if path.startswith('bundle:'):
self.scheme = 'bundle'
path = path[7:]
if path.startswith('//'):
path = path[2:]
self.path = path
return
if self._matchscheme(path):
parts = path.split(':', 1)
if parts[0]:
self.scheme, path = parts
self._localpath = False
if not path:
path = None
if self._localpath:
self.path = ''
return
else:
if self._localpath:
self.path = path
return
if parsequery and '?' in path:
path, self.query = path.split('?', 1)
if not path:
path = None
if not self.query:
self.query = None
# // is required to specify a host/authority
if path and path.startswith('//'):
parts = path[2:].split('/', 1)
if len(parts) > 1:
self.host, path = parts
else:
self.host = parts[0]
path = None
if not self.host:
self.host = None
# path of file:///d is /d
# path of file:///d:/ is d:/, not /d:/
if path and not hasdriveletter(path):
path = '/' + path
if self.host and '@' in self.host:
self.user, self.host = self.host.rsplit('@', 1)
if ':' in self.user:
self.user, self.passwd = self.user.split(':', 1)
if not self.host:
self.host = None
# Don't split on colons in IPv6 addresses without ports
if (self.host and ':' in self.host and
not (self.host.startswith('[') and self.host.endswith(']'))):
self._hostport = self.host
self.host, self.port = self.host.rsplit(':', 1)
if not self.host:
self.host = None
if (self.host and self.scheme == 'file' and
self.host not in ('localhost', '127.0.0.1', '[::1]')):
raise Abort(_('file:// URLs can only refer to localhost'))
self.path = path
# leave the query string escaped
for a in ('user', 'passwd', 'host', 'port',
'path', 'fragment'):
v = getattr(self, a)
if v is not None:
setattr(self, a, _urlunquote(v))
def __repr__(self):
attrs = []
for a in ('scheme', 'user', 'passwd', 'host', 'port', 'path',
'query', 'fragment'):
v = getattr(self, a)
if v is not None:
attrs.append('%s: %r' % (a, v))
return '<url %s>' % ', '.join(attrs)
def __str__(self):
r"""Join the URL's components back into a URL string.
Examples:
>>> str(url('http://user:pw@host:80/c:/bob?fo:oo#ba:ar'))
'http://user:pw@host:80/c:/bob?fo:oo#ba:ar'
>>> str(url('http://user:pw@host:80/?foo=bar&baz=42'))
'http://user:pw@host:80/?foo=bar&baz=42'
>>> str(url('http://user:pw@host:80/?foo=bar%3dbaz'))
'http://user:pw@host:80/?foo=bar%3dbaz'
>>> str(url('ssh://user:pw@[::1]:2200//home/joe#'))
'ssh://user:pw@[::1]:2200//home/joe#'
>>> str(url('http://localhost:80//'))
'http://localhost:80//'
>>> str(url('http://localhost:80/'))
'http://localhost:80/'
>>> str(url('http://localhost:80'))
'http://localhost:80/'
>>> str(url('bundle:foo'))
'bundle:foo'
>>> str(url('bundle://../foo'))
'bundle:../foo'
>>> str(url('path'))
'path'
>>> str(url('file:///tmp/foo/bar'))
'file:///tmp/foo/bar'
>>> str(url('file:///c:/tmp/foo/bar'))
'file:///c:/tmp/foo/bar'
>>> print url(r'bundle:foo\bar')
bundle:foo\bar
>>> print url(r'file:///D:\data\hg')
file:///D:\data\hg
"""
if self._localpath:
s = self.path
if self.scheme == 'bundle':
s = 'bundle:' + s
if self.fragment:
s += '#' + self.fragment
return s
s = self.scheme + ':'
if self.user or self.passwd or self.host:
s += '//'
elif self.scheme and (not self.path or self.path.startswith('/')
or hasdriveletter(self.path)):
s += '//'
if hasdriveletter(self.path):
s += '/'
if self.user:
s += urllib.quote(self.user, safe=self._safechars)
if self.passwd:
s += ':' + urllib.quote(self.passwd, safe=self._safechars)
if self.user or self.passwd:
s += '@'
if self.host:
if not (self.host.startswith('[') and self.host.endswith(']')):
s += urllib.quote(self.host)
else:
s += self.host
if self.port:
s += ':' + urllib.quote(self.port)
if self.host:
s += '/'
if self.path:
# TODO: similar to the query string, we should not unescape the
# path when we store it, the path might contain '%2f' = '/',
# which we should *not* escape.
s += urllib.quote(self.path, safe=self._safepchars)
if self.query:
# we store the query in escaped form.
s += '?' + self.query
if self.fragment is not None:
s += '#' + urllib.quote(self.fragment, safe=self._safepchars)
return s
def authinfo(self):
user, passwd = self.user, self.passwd
try:
self.user, self.passwd = None, None
s = str(self)
finally:
self.user, self.passwd = user, passwd
if not self.user:
return (s, None)
# authinfo[1] is passed to urllib2 password manager, and its
# URIs must not contain credentials. The host is passed in the
# URIs list because Python < 2.4.3 uses only that to search for
# a password.
return (s, (None, (s, self.host),
self.user, self.passwd or ''))
def isabs(self):
if self.scheme and self.scheme != 'file':
return True # remote URL
if hasdriveletter(self.path):
return True # absolute for our purposes - can't be joined()
if self.path.startswith(r'\\'):
return True # Windows UNC path
if self.path.startswith('/'):
return True # POSIX-style
return False
def localpath(self):
if self.scheme == 'file' or self.scheme == 'bundle':
path = self.path or '/'
# For Windows, we need to promote hosts containing drive
# letters to paths with drive letters.
if hasdriveletter(self._hostport):
path = self._hostport + '/' + self.path
elif (self.host is not None and self.path
and not hasdriveletter(path)):
path = '/' + path
return path
return self._origpath
def islocal(self):
'''whether localpath will return something that posixfile can open'''
return (not self.scheme or self.scheme == 'file'
or self.scheme == 'bundle')
def hasscheme(path):
return bool(url(path).scheme)
def hasdriveletter(path):
return path and path[1:2] == ':' and path[0:1].isalpha()
def urllocalpath(path):
return url(path, parsequery=False, parsefragment=False).localpath()
def hidepassword(u):
'''hide user credential in a url string'''
u = url(u)
if u.passwd:
u.passwd = '***'
return str(u)
def removeauth(u):
'''remove all authentication information from a url string'''
u = url(u)
u.user = u.passwd = None
return str(u)
def isatty(fp):
try:
return fp.isatty()
except AttributeError:
return False
timecount = unitcountfn(
(1, 1e3, _('%.0f s')),
(100, 1, _('%.1f s')),
(10, 1, _('%.2f s')),
(1, 1, _('%.3f s')),
(100, 0.001, _('%.1f ms')),
(10, 0.001, _('%.2f ms')),
(1, 0.001, _('%.3f ms')),
(100, 0.000001, _('%.1f us')),
(10, 0.000001, _('%.2f us')),
(1, 0.000001, _('%.3f us')),
(100, 0.000000001, _('%.1f ns')),
(10, 0.000000001, _('%.2f ns')),
(1, 0.000000001, _('%.3f ns')),
)
_timenesting = [0]
def timed(func):
'''Report the execution time of a function call to stderr.
During development, use as a decorator when you need to measure
the cost of a function, e.g. as follows:
@util.timed
def foo(a, b, c):
pass
'''
def wrapper(*args, **kwargs):
start = time.time()
indent = 2
_timenesting[0] += indent
try:
return func(*args, **kwargs)
finally:
elapsed = time.time() - start
_timenesting[0] -= indent
sys.stderr.write('%s%s: %s\n' %
(' ' * _timenesting[0], func.__name__,
timecount(elapsed)))
return wrapper
_sizeunits = (('m', 2**20), ('k', 2**10), ('g', 2**30),
('kb', 2**10), ('mb', 2**20), ('gb', 2**30), ('b', 1))
def sizetoint(s):
'''Convert a space specifier to a byte count.
>>> sizetoint('30')
30
>>> sizetoint('2.2kb')
2252
>>> sizetoint('6M')
6291456
'''
t = s.strip().lower()
try:
for k, u in _sizeunits:
if t.endswith(k):
return int(float(t[:-len(k)]) * u)
return int(t)
except ValueError:
raise error.ParseError(_("couldn't parse size: %s") % s)
class hooks(object):
'''A collection of hook functions that can be used to extend a
function's behavior. Hooks are called in lexicographic order,
based on the names of their sources.'''
def __init__(self):
self._hooks = []
def add(self, source, hook):
self._hooks.append((source, hook))
def __call__(self, *args):
self._hooks.sort(key=lambda x: x[0])
results = []
for source, hook in self._hooks:
results.append(hook(*args))
return results
def debugstacktrace(msg='stacktrace', skip=0, f=sys.stderr, otherf=sys.stdout):
'''Writes a message to f (stderr) with a nicely formatted stacktrace.
Skips the 'skip' last entries. By default it will flush stdout first.
It can be used everywhere and do intentionally not require an ui object.
Not be used in production code but very convenient while developing.
'''
if otherf:
otherf.flush()
f.write('%s at:\n' % msg)
entries = [('%s:%s' % (fn, ln), func)
for fn, ln, func, _text in traceback.extract_stack()[:-skip - 1]]
if entries:
fnmax = max(len(entry[0]) for entry in entries)
for fnln, func in entries:
f.write(' %-*s in %s\n' % (fnmax, fnln, func))
f.flush()
class dirs(object):
'''a multiset of directory names from a dirstate or manifest'''
def __init__(self, map, skip=None):
self._dirs = {}
addpath = self.addpath
if safehasattr(map, 'iteritems') and skip is not None:
for f, s in map.iteritems():
if s[0] != skip:
addpath(f)
else:
for f in map:
addpath(f)
def addpath(self, path):
dirs = self._dirs
for base in finddirs(path):
if base in dirs:
dirs[base] += 1
return
dirs[base] = 1
def delpath(self, path):
dirs = self._dirs
for base in finddirs(path):
if dirs[base] > 1:
dirs[base] -= 1
return
del dirs[base]
def __iter__(self):
return self._dirs.iterkeys()
def __contains__(self, d):
return d in self._dirs
if safehasattr(parsers, 'dirs'):
dirs = parsers.dirs
def finddirs(path):
pos = path.rfind('/')
while pos != -1:
yield path[:pos]
pos = path.rfind('/', 0, pos)
# compression utility
class nocompress(object):
def compress(self, x):
return x
def flush(self):
return ""
compressors = {
None: nocompress,
# lambda to prevent early import
'BZ': lambda: bz2.BZ2Compressor(),
'GZ': lambda: zlib.compressobj(),
}
# also support the old form by courtesies
compressors['UN'] = compressors[None]
def _makedecompressor(decompcls):
def generator(f):
d = decompcls()
for chunk in filechunkiter(f):
yield d.decompress(chunk)
def func(fh):
return chunkbuffer(generator(fh))
return func
def _bz2():
d = bz2.BZ2Decompressor()
# Bzip2 stream start with BZ, but we stripped it.
# we put it back for good measure.
d.decompress('BZ')
return d
decompressors = {None: lambda fh: fh,
'_truncatedBZ': _makedecompressor(_bz2),
'BZ': _makedecompressor(lambda: bz2.BZ2Decompressor()),
'GZ': _makedecompressor(lambda: zlib.decompressobj()),
}
# also support the old form by courtesies
decompressors['UN'] = decompressors[None]
# convenient shortcut
dst = debugstacktrace