# 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 i18n import _
import error, osutil, encoding, collections
import errno, re, shutil, sys, tempfile, traceback
import os, time, datetime, calendar, textwrap, signal
import imp, socket, urllib
if os.name == 'nt':
import windows as platform
else:
import posix as platform
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
openhardlinks = platform.openhardlinks
oslink = platform.oslink
parsepatchoutput = platform.parsepatchoutput
pconvert = platform.pconvert
popen = platform.popen
posixfile = platform.posixfile
quotecommand = platform.quotecommand
realpath = platform.realpath
rename = platform.rename
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)
termwidth = platform.termwidth
testpid = platform.testpid
umask = platform.umask
unlink = platform.unlink
unlinkpath = platform.unlinkpath
username = platform.username
# Python compatibility
_notset = object()
def safehasattr(thing, attr):
return getattr(thing, attr, _notset) is not _notset
def sha1(s=''):
'''
Low-overhead wrapper around Python's SHA support
>>> f = _fastsha1
>>> a = sha1()
>>> a = f()
>>> a.hexdigest()
'da39a3ee5e6b4b0d3255bfef95601890afd80709'
'''
return _fastsha1(s)
def _fastsha1(s=''):
# This function will import sha1 from hashlib or sha (whichever is
# available) and overwrite itself with it on the first call.
# Subsequent calls will go directly to the imported function.
if sys.version_info >= (2, 5):
from hashlib import sha1 as _sha1
else:
from sha import sha as _sha1
global _fastsha1, sha1
_fastsha1 = sha1 = _sha1
return _sha1(s)
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:]
import subprocess
closefds = os.name == 'posix'
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):
p = subprocess.Popen(cmd, shell=True, bufsize=-1,
close_fds=closefds,
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=newlines,
env=env)
return p.stdin, p.stdout, p.stderr
def version():
"""Return version information if available."""
try:
import __version__
return __version__.version
except ImportError:
return 'unknown'
# 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
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
try:
collections.deque.remove
deque = collections.deque
except AttributeError:
# python 2.4 lacks deque.remove
class deque(collections.deque):
def remove(self, val):
for i, v in enumerate(self):
if v == val:
del self[i]
break
def lrucachefunc(func):
'''cache most recent results of function calls'''
cache = {}
order = 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):
setattr(obj, 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 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 '.'
_hgexecutable = None
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
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 system(cmd, environ={}, 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. if ui object,
print error message and 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.'''
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':
# 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 out == sys.__stdout__:
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)
for line in proc.stdout:
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)
try:
onerr.warn(errmsg + '\n')
except AttributeError:
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):
"copy a file, preserving mode and atime/mtime"
if os.path.lexists(dest):
unlink(dest)
if os.path.islink(src):
os.symlink(os.readlink(src), dest)
else:
try:
shutil.copyfile(src, dest)
shutil.copymode(src, dest)
except shutil.Error, inst:
raise Abort(str(inst))
def copyfiles(src, dst, hardlink=None):
"""Copy a directory tree using hardlinks if possible"""
if hardlink is None:
hardlink = (os.stat(src).st_dev ==
os.stat(os.path.dirname(dst)).st_dev)
num = 0
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)
hardlink, n = copyfiles(srcname, dstname, hardlink)
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
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):
'''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")
'''
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, 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, 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):
"""
Check whether the given path is on a case-sensitive filesystem
Requires a path (like /foo/.hg) ending with a foldable final
directory component.
"""
s1 = os.stat(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.stat(p2)
if s2 == s1:
return False
return True
except OSError:
return True
try:
import re2
_re2 = None
except ImportError:
_re2 = False
def compilere(pat):
'''Compile a regular expression, using re2 if possible
For best performance, use only re2-compatible regexp features.'''
global _re2
if _re2 is None:
try:
re2.compile
_re2 = True
except ImportError:
_re2 = False
if _re2:
try:
return re2.compile(pat)
except re2.error:
pass
return re.compile(pat)
_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 find(p, contents):
for n in contents:
if normcase(n) == p:
return n
return None
seps = os.sep
if os.altsep:
seps = seps + os.altsep
# Protect backslashes. This gets silly very quickly.
seps.replace('\\','\\\\')
pattern = re.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] = os.listdir(dir)
contents = _fspathcache[dir]
found = find(part, contents)
if not found:
# retry "once per directory" per "dirstate.walk" which
# may take place for each patches of "hg qpush", for example
contents = os.listdir(dir)
_fspathcache[dir] = contents
found = find(part, contents)
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:
try:
oslink(f1, f2)
except OSError:
return False
# nlinks() may behave differently for files on Windows shares if
# the file is open.
fd = posixfile(f2)
return nlinks(f2) > 1
finally:
if fd is not None:
fd.close()
for f in (f1, f2):
try:
os.unlink(f)
except OSError:
pass
return False
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, 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):
"""recursive directory creation with parent mode inheritance"""
try:
os.mkdir(name)
except OSError, 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)
os.mkdir(name)
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 = deque()
def read(self, l):
"""Read L bytes of data from the iterator of chunks of data.
Returns less than L bytes if the iterator runs dry."""
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
chunk = queue.popleft()
left -= len(chunk)
if left < 0:
queue.appendleft(chunk[left:])
buf.append(chunk[:left])
else:
buf.append(chunk)
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():
ct = time.time()
if ct < 0:
hint = _("check your clock")
raise Abort(_("negative timestamp: %d") % ct, hint=hint)
delta = (datetime.datetime.utcfromtimestamp(ct) -
datetime.datetime.fromtimestamp(ct))
tz = delta.days * 86400 + delta.seconds
return ct, 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:
sign = (tz > 0) and "-" or "+"
minutes = abs(tz) // 60
format = format.replace("%1", "%c%02d" % (sign, minutes // 60))
format = format.replace("%2", "%02d" % (minutes % 60))
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 strdate(string, format, defaults=[]):
"""parse a localized time string and return a (unixtime, offset) tuple.
if the string cannot be parsed, ValueError is raised."""
def timezone(string):
tz = string.split()[-1]
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
# NOTE: unixtime = localunixtime + offset
offset, date = timezone(string), 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={}):
"""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.
"""
if not date:
return 0, 0
if isinstance(date, tuple) and len(date) == 2:
return date
if not formats:
formats = defaultdateformats
date = date.strip()
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 = dict(mb="1", d="1")
return parsedate(date, extendeddateformats, d)[0]
def upper(date):
d = dict(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 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):
if len(text) <= maxlength:
return text, False
else:
return "%s..." % (text[:maxlength - 3]), True
def ellipsis(text, maxlength=400):
"""Trim string to at most maxlength (default: 400) characters."""
try:
# use unicode not to split at intermediate multi-byte sequence
utext, truncated = _ellipsis(text.decode(encoding.encoding),
maxlength)
if not truncated:
return text
return utext.encode(encoding.encoding)
except (UnicodeDecodeError, UnicodeEncodeError):
return _ellipsis(text, maxlength)[0]
_byteunits = (
(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 bytecount(nbytes):
'''return byte count formatted as readable string, with units'''
for multiplier, divisor, format in _byteunits:
if nbytes >= divisor * multiplier:
return format % (nbytes / float(divisor))
return _byteunits[-1][2] % nbytes
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 __init__(self, **kwargs):
textwrap.TextWrapper.__init__(self, **kwargs)
# for compatibility between 2.4 and 2.6
if getattr(self, 'drop_whitespace', None) is None:
self.drop_whitespace = kwargs.get('drop_whitespace', True)
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)
try:
any, all = any, all
except NameError:
def any(iterable):
for i in iterable:
if i:
return True
return False
def all(iterable):
for i in iterable:
if not i:
return False
return True
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 = re.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, util.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'>
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 = re.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
path = path
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
"""
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 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(fd):
try:
return fd.isatty()
except AttributeError:
return False