"""
util.py - Mercurial utility functions and platform specfic 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, incorporated herein by reference.
This contains helper routines that are independent of the SCM core and hide
platform-specific details from the core.
"""
from i18n import _
import cStringIO, errno, getpass, popen2, re, shutil, sys, tempfile, strutil
import os, stat, threading, time, calendar, ConfigParser, locale, glob
try:
set = set
frozenset = frozenset
except NameError:
from sets import Set as set, ImmutableSet as frozenset
try:
_encoding = os.environ.get("HGENCODING")
if sys.platform == 'darwin' and not _encoding:
# On darwin, getpreferredencoding ignores the locale environment and
# always returns mac-roman. We override this if the environment is
# not C (has been customized by the user).
locale.setlocale(locale.LC_CTYPE, '')
_encoding = locale.getlocale()[1]
if not _encoding:
_encoding = locale.getpreferredencoding() or 'ascii'
except locale.Error:
_encoding = 'ascii'
_encodingmode = os.environ.get("HGENCODINGMODE", "strict")
_fallbackencoding = 'ISO-8859-1'
def tolocal(s):
"""
Convert a string from internal UTF-8 to local encoding
All internal strings should be UTF-8 but some repos before the
implementation of locale support may contain latin1 or possibly
other character sets. We attempt to decode everything strictly
using UTF-8, then Latin-1, and failing that, we use UTF-8 and
replace unknown characters.
"""
for e in ('UTF-8', _fallbackencoding):
try:
u = s.decode(e) # attempt strict decoding
return u.encode(_encoding, "replace")
except LookupError, k:
raise Abort(_("%s, please check your locale settings") % k)
except UnicodeDecodeError:
pass
u = s.decode("utf-8", "replace") # last ditch
return u.encode(_encoding, "replace")
def fromlocal(s):
"""
Convert a string from the local character encoding to UTF-8
We attempt to decode strings using the encoding mode set by
HGENCODINGMODE, which defaults to 'strict'. In this mode, unknown
characters will cause an error message. Other modes include
'replace', which replaces unknown characters with a special
Unicode character, and 'ignore', which drops the character.
"""
try:
return s.decode(_encoding, _encodingmode).encode("utf-8")
except UnicodeDecodeError, inst:
sub = s[max(0, inst.start-10):inst.start+10]
raise Abort("decoding near '%s': %s!" % (sub, inst))
except LookupError, k:
raise Abort(_("%s, please check your locale settings") % k)
def locallen(s):
"""Find the length in characters of a local string"""
return len(s.decode(_encoding, "replace"))
def localsub(s, a, b=None):
try:
u = s.decode(_encoding, _encodingmode)
if b is not None:
u = u[a:b]
else:
u = u[:a]
return u.encode(_encoding, _encodingmode)
except UnicodeDecodeError, inst:
sub = s[max(0, inst.start-10), inst.start+10]
raise Abort(_("decoding near '%s': %s!") % (sub, inst))
# 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:%SP',
'%H:%M',
'%I:%M%p',
)
extendeddateformats = defaultdateformats + (
"%Y",
"%Y-%m",
"%b",
"%b %Y",
)
class SignalInterrupt(Exception):
"""Exception raised on SIGTERM and SIGHUP."""
# differences from SafeConfigParser:
# - case-sensitive keys
# - allows values that are not strings (this means that you may not
# be able to save the configuration to a file)
class configparser(ConfigParser.SafeConfigParser):
def optionxform(self, optionstr):
return optionstr
def set(self, section, option, value):
return ConfigParser.ConfigParser.set(self, section, option, value)
def _interpolate(self, section, option, rawval, vars):
if not isinstance(rawval, basestring):
return rawval
return ConfigParser.SafeConfigParser._interpolate(self, section,
option, rawval, vars)
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
def pipefilter(s, cmd):
'''filter string S through command CMD, returning its output'''
(pin, pout) = os.popen2(cmd, 'b')
def writer():
try:
pin.write(s)
pin.close()
except IOError, inst:
if inst.errno != errno.EPIPE:
raise
# we should use select instead on UNIX, but this will work on most
# systems, including Windows
w = threading.Thread(target=writer)
w.start()
f = pout.read()
pout.close()
w.join()
return f
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, explain_exit(code)))
return open(outname, 'rb').read()
finally:
try:
if inname: os.unlink(inname)
except: pass
try:
if outname: os.unlink(outname)
except: 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 using diff's heuristic"""
if s and '\0' in s[:4096]:
return True
return False
def unique(g):
"""return the uniq elements of iterable g"""
seen = {}
l = []
for f in g:
if f not in seen:
seen[f] = 1
l.append(f)
return l
class Abort(Exception):
"""Raised if a command needs to print an error and exit."""
class UnexpectedOutput(Abort):
"""Raised to print an error with part of output and exit."""
def always(fn): return True
def never(fn): return False
def expand_glob(pats):
'''On Windows, expand the implicit globs in a list of patterns'''
if os.name != 'nt':
return list(pats)
ret = []
for p in pats:
kind, name = patkind(p, None)
if kind is None:
globbed = glob.glob(name)
if globbed:
ret.extend(globbed)
continue
# if we couldn't expand the glob, just keep it around
ret.append(p)
return ret
def patkind(name, dflt_pat='glob'):
"""Split a string into an optional pattern kind prefix and the
actual pattern."""
for prefix in 're', 'glob', 'path', 'relglob', 'relpath', 'relre':
if name.startswith(prefix + ':'): return name.split(':', 1)
return dflt_pat, name
def globre(pat, head='^', tail='$'):
"convert a glob pattern into a regexp"
i, n = 0, len(pat)
res = ''
group = False
def peek(): return i < n and pat[i]
while i < n:
c = pat[i]
i = i+1
if c == '*':
if peek() == '*':
i += 1
res += '.*'
else:
res += '[^/]*'
elif c == '?':
res += '.'
elif c == '[':
j = i
if j < n and pat[j] in '!]':
j += 1
while j < n and pat[j] != ']':
j += 1
if j >= n:
res += '\\['
else:
stuff = pat[i:j].replace('\\','\\\\')
i = j + 1
if stuff[0] == '!':
stuff = '^' + stuff[1:]
elif stuff[0] == '^':
stuff = '\\' + stuff
res = '%s[%s]' % (res, stuff)
elif c == '{':
group = True
res += '(?:'
elif c == '}' and group:
res += ')'
group = False
elif c == ',' and group:
res += '|'
elif c == '\\':
p = peek()
if p:
i += 1
res += re.escape(p)
else:
res += re.escape(c)
else:
res += re.escape(c)
return head + res + tail
_globchars = {'[': 1, '{': 1, '*': 1, '?': 1}
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 = n1.split(os.sep), 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)
def canonpath(root, cwd, myname):
"""return the canonical path of myname, given cwd and root"""
if root == os.sep:
rootsep = os.sep
elif root.endswith(os.sep):
rootsep = root
else:
rootsep = root + os.sep
name = myname
if not os.path.isabs(name):
name = os.path.join(root, cwd, name)
name = os.path.normpath(name)
audit_path = path_auditor(root)
if name != rootsep and name.startswith(rootsep):
name = name[len(rootsep):]
audit_path(name)
return pconvert(name)
elif name == root:
return ''
else:
# Determine whether `name' is in the hierarchy at or beneath `root',
# by iterating name=dirname(name) until that causes no change (can't
# check name == '/', because that doesn't work on windows). For each
# `name', compare dev/inode numbers. If they match, the list `rel'
# holds the reversed list of components making up the relative file
# name we want.
root_st = os.stat(root)
rel = []
while True:
try:
name_st = os.stat(name)
except OSError:
break
if samestat(name_st, root_st):
if not rel:
# name was actually the same as root (maybe a symlink)
return ''
rel.reverse()
name = os.path.join(*rel)
audit_path(name)
return pconvert(name)
dirname, basename = os.path.split(name)
rel.append(basename)
if dirname == name:
break
name = dirname
raise Abort('%s not under root' % myname)
def matcher(canonroot, cwd='', names=[], inc=[], exc=[], src=None):
return _matcher(canonroot, cwd, names, inc, exc, 'glob', src)
def cmdmatcher(canonroot, cwd='', names=[], inc=[], exc=[], src=None,
globbed=False, default=None):
default = default or 'relpath'
if default == 'relpath' and not globbed:
names = expand_glob(names)
return _matcher(canonroot, cwd, names, inc, exc, default, src)
def _matcher(canonroot, cwd, names, inc, exc, dflt_pat, src):
"""build a function to match a set of file patterns
arguments:
canonroot - the canonical root of the tree you're matching against
cwd - the current working directory, if relevant
names - patterns to find
inc - patterns to include
exc - patterns to exclude
dflt_pat - if a pattern in names has no explicit type, assume this one
src - where these patterns came from (e.g. .hgignore)
a pattern is one of:
'glob:<glob>' - a glob relative to cwd
're:<regexp>' - a regular expression
'path:<path>' - a path relative to canonroot
'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs)
'relpath:<path>' - a path relative to cwd
'relre:<regexp>' - a regexp that doesn't have to match the start of a name
'<something>' - one of the cases above, selected by the dflt_pat argument
returns:
a 3-tuple containing
- list of roots (places where one should start a recursive walk of the fs);
this often matches the explicit non-pattern names passed in, but also
includes the initial part of glob: patterns that has no glob characters
- a bool match(filename) function
- a bool indicating if any patterns were passed in
"""
# a common case: no patterns at all
if not names and not inc and not exc:
return [], always, False
def contains_glob(name):
for c in name:
if c in _globchars: return True
return False
def regex(kind, name, tail):
'''convert a pattern into a regular expression'''
if not name:
return ''
if kind == 're':
return name
elif kind == 'path':
return '^' + re.escape(name) + '(?:/|$)'
elif kind == 'relglob':
return globre(name, '(?:|.*/)', tail)
elif kind == 'relpath':
return re.escape(name) + '(?:/|$)'
elif kind == 'relre':
if name.startswith('^'):
return name
return '.*' + name
return globre(name, '', tail)
def matchfn(pats, tail):
"""build a matching function from a set of patterns"""
if not pats:
return
try:
pat = '(?:%s)' % '|'.join([regex(k, p, tail) for (k, p) in pats])
return re.compile(pat).match
except OverflowError:
# We're using a Python with a tiny regex engine and we
# made it explode, so we'll divide the pattern list in two
# until it works
l = len(pats)
if l < 2:
raise
a, b = matchfn(pats[:l/2], tail), matchfn(pats[l/2:], tail)
return lambda s: a(s) or b(s)
except re.error:
for k, p in pats:
try:
re.compile('(?:%s)' % regex(k, p, tail))
except re.error:
if src:
raise Abort("%s: invalid pattern (%s): %s" %
(src, k, p))
else:
raise Abort("invalid pattern (%s): %s" % (k, p))
raise Abort("invalid pattern")
def globprefix(pat):
'''return the non-glob prefix of a path, e.g. foo/* -> foo'''
root = []
for p in pat.split('/'):
if contains_glob(p): break
root.append(p)
return '/'.join(root) or '.'
def normalizepats(names, default):
pats = []
roots = []
anypats = False
for kind, name in [patkind(p, default) for p in names]:
if kind in ('glob', 'relpath'):
name = canonpath(canonroot, cwd, name)
elif kind in ('relglob', 'path'):
name = normpath(name)
pats.append((kind, name))
if kind in ('glob', 're', 'relglob', 'relre'):
anypats = True
if kind == 'glob':
root = globprefix(name)
roots.append(root)
elif kind in ('relpath', 'path'):
roots.append(name or '.')
elif kind == 'relglob':
roots.append('.')
return roots, pats, anypats
roots, pats, anypats = normalizepats(names, dflt_pat)
patmatch = matchfn(pats, '$') or always
incmatch = always
if inc:
dummy, inckinds, dummy = normalizepats(inc, 'glob')
incmatch = matchfn(inckinds, '(?:/|$)')
excmatch = lambda fn: False
if exc:
dummy, exckinds, dummy = normalizepats(exc, 'glob')
excmatch = matchfn(exckinds, '(?:/|$)')
if not names and inc and not exc:
# common case: hgignore patterns
match = incmatch
else:
match = lambda fn: incmatch(fn) and not excmatch(fn) and patmatch(fn)
return (roots, match, (inc or exc or anypats) and True)
_hgexecutable = None
def hgexecutable():
"""return location of the 'hg' executable.
Defaults to $HG or 'hg' in the search path.
"""
if _hgexecutable is None:
set_hgexecutable(os.environ.get('HG') or find_exe('hg', 'hg'))
return _hgexecutable
def set_hgexecutable(path):
"""set location of the 'hg' executable"""
global _hgexecutable
_hgexecutable = path
def system(cmd, environ={}, cwd=None, onerr=None, errprefix=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.'''
def py2shell(val):
'convert python object into string that is useful to shell'
if val in (None, False):
return '0'
if val == True:
return '1'
return str(val)
oldenv = {}
for k in environ:
oldenv[k] = os.environ.get(k)
if cwd is not None:
oldcwd = os.getcwd()
origcmd = cmd
if os.name == 'nt':
cmd = '"%s"' % cmd
try:
for k, v in environ.iteritems():
os.environ[k] = py2shell(v)
os.environ['HG'] = hgexecutable()
if cwd is not None and oldcwd != cwd:
os.chdir(cwd)
rc = os.system(cmd)
if sys.platform == 'OpenVMS' and rc & 1:
rc = 0
if rc and onerr:
errmsg = '%s %s' % (os.path.basename(origcmd.split(None, 1)[0]),
explain_exit(rc)[0])
if errprefix:
errmsg = '%s: %s' % (errprefix, errmsg)
try:
onerr.warn(errmsg + '\n')
except AttributeError:
raise onerr(errmsg)
return rc
finally:
for k, v in oldenv.iteritems():
if v is None:
del os.environ[k]
else:
os.environ[k] = v
if cwd is not None and oldcwd != cwd:
os.chdir(oldcwd)
# os.path.lexists is not available on python2.3
def lexists(filename):
"test whether a file with this name exists. does not follow symlinks"
try:
os.lstat(filename)
except:
return False
return True
def rename(src, dst):
"""forcibly rename a file"""
try:
os.rename(src, dst)
except OSError, err: # FIXME: check err (EEXIST ?)
# on windows, rename to existing file is not allowed, so we
# must delete destination first. but if file is open, unlink
# schedules it for delete but does not delete it. rename
# happens immediately even for open files, so we create
# temporary file, delete it, rename destination to that name,
# then delete that. then rename is safe to do.
fd, temp = tempfile.mkstemp(dir=os.path.dirname(dst) or '.')
os.close(fd)
os.unlink(temp)
os.rename(dst, temp)
os.unlink(temp)
os.rename(src, dst)
def unlink(f):
"""unlink and remove the directory if it is empty"""
os.unlink(f)
# try removing directories that might now be empty
try:
os.removedirs(os.path.dirname(f))
except OSError:
pass
def copyfile(src, dest):
"copy a file, preserving mode"
if os.path.islink(src):
try:
os.unlink(dest)
except:
pass
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)
if os.path.isdir(src):
os.mkdir(dst)
for name in os.listdir(src):
srcname = os.path.join(src, name)
dstname = os.path.join(dst, name)
copyfiles(srcname, dstname, hardlink)
else:
if hardlink:
try:
os_link(src, dst)
except (IOError, OSError):
hardlink = False
shutil.copy(src, dst)
else:
shutil.copy(src, dst)
class path_auditor(object):
'''ensure that a filesystem path contains no banned components.
the following properties of a path are checked:
- under top-level .hg
- starts at the root of a windows drive
- contains ".."
- traverses a symlink (e.g. a/symlink_here/b)
- inside a nested repository'''
def __init__(self, root):
self.audited = set()
self.auditeddir = set()
self.root = root
def __call__(self, path):
if path in self.audited:
return
normpath = os.path.normcase(path)
parts = normpath.split(os.sep)
if (os.path.splitdrive(path)[0] or parts[0] in ('.hg', '')
or os.pardir in parts):
raise Abort(_("path contains illegal component: %s") % path)
def check(prefix):
curpath = os.path.join(self.root, prefix)
try:
st = os.lstat(curpath)
except OSError, err:
# EINVAL can be raised as invalid path syntax under win32.
# They must be ignored for patterns can be checked too.
if err.errno not in (errno.ENOENT, errno.EINVAL):
raise
else:
if stat.S_ISLNK(st.st_mode):
raise Abort(_('path %r traverses symbolic link %r') %
(path, prefix))
elif (stat.S_ISDIR(st.st_mode) and
os.path.isdir(os.path.join(curpath, '.hg'))):
raise Abort(_('path %r is inside repo %r') %
(path, prefix))
prefixes = []
for c in strutil.rfindall(normpath, os.sep):
prefix = normpath[:c]
if prefix in self.auditeddir:
break
check(prefix)
prefixes.append(prefix)
self.audited.add(path)
# only add prefixes to the cache after checking everything: we don't
# want to add "foo/bar/baz" before checking if there's a "foo/.hg"
self.auditeddir.update(prefixes)
def _makelock_file(info, pathname):
ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
os.write(ld, info)
os.close(ld)
def _readlock_file(pathname):
return posixfile(pathname).read()
def nlinks(pathname):
"""Return number of hardlinks for the given file."""
return os.lstat(pathname).st_nlink
if hasattr(os, 'link'):
os_link = os.link
else:
def os_link(src, dst):
raise OSError(0, _("Hardlinks not supported"))
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)
posixfile = file
def is_win_9x():
'''return true if run on windows 95, 98 or me.'''
try:
return sys.getwindowsversion()[3] == 1
except AttributeError:
return os.name == 'nt' and 'command' in os.environ.get('comspec', '')
getuser_fallback = None
def getuser():
'''return name of current user'''
try:
return getpass.getuser()
except ImportError:
# import of pwd will fail on windows - try fallback
if getuser_fallback:
return getuser_fallback()
# raised if win32api not available
raise Abort(_('user name not available - set USERNAME '
'environment variable'))
def username(uid=None):
"""Return the name of the user with the given uid.
If uid is None, return the name of the current user."""
try:
import pwd
if uid is None:
uid = os.getuid()
try:
return pwd.getpwuid(uid)[0]
except KeyError:
return str(uid)
except ImportError:
return None
def groupname(gid=None):
"""Return the name of the group with the given gid.
If gid is None, return the name of the current group."""
try:
import grp
if gid is None:
gid = os.getgid()
try:
return grp.getgrgid(gid)[0]
except KeyError:
return str(gid)
except ImportError:
return None
# File system features
def checkfolding(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)
p2 = os.path.join(d, b.upper())
if path == p2:
p2 = os.path.join(d, b.lower())
try:
s2 = os.stat(p2)
if s2 == s1:
return False
return True
except:
return True
def checkexec(path):
"""
Check whether the given path is on a filesystem with UNIX-like exec flags
Requires a directory (like /foo/.hg)
"""
try:
fh, fn = tempfile.mkstemp("", "", path)
os.close(fh)
m = os.stat(fn).st_mode
os.chmod(fn, m ^ 0111)
r = (os.stat(fn).st_mode != m)
os.unlink(fn)
except (IOError,OSError):
# we don't care, the user probably won't be able to commit anyway
return False
return r
def execfunc(path, fallback):
'''return an is_exec() function with default to fallback'''
if checkexec(path):
return lambda x: is_exec(os.path.join(path, x))
return fallback
def checklink(path):
"""check whether the given path is on a symlink-capable filesystem"""
# mktemp is not racy because symlink creation will fail if the
# file already exists
name = tempfile.mktemp(dir=path)
try:
os.symlink(".", name)
os.unlink(name)
return True
except (OSError, AttributeError):
return False
def linkfunc(path, fallback):
'''return an is_link() function with default to fallback'''
if checklink(path):
return lambda x: os.path.islink(os.path.join(path, x))
return fallback
_umask = os.umask(0)
os.umask(_umask)
def needbinarypatch():
"""return True if patches should be applied in binary mode by default."""
return os.name == 'nt'
# Platform specific variants
if os.name == 'nt':
import msvcrt
nulldev = 'NUL:'
class winstdout:
'''stdout on windows misbehaves if sent through a pipe'''
def __init__(self, fp):
self.fp = fp
def __getattr__(self, key):
return getattr(self.fp, key)
def close(self):
try:
self.fp.close()
except: pass
def write(self, s):
try:
return self.fp.write(s)
except IOError, inst:
if inst.errno != 0: raise
self.close()
raise IOError(errno.EPIPE, 'Broken pipe')
def flush(self):
try:
return self.fp.flush()
except IOError, inst:
if inst.errno != errno.EINVAL: raise
self.close()
raise IOError(errno.EPIPE, 'Broken pipe')
sys.stdout = winstdout(sys.stdout)
def system_rcpath():
try:
return system_rcpath_win32()
except:
return [r'c:\mercurial\mercurial.ini']
def user_rcpath():
'''return os-specific hgrc search path to the user dir'''
try:
userrc = user_rcpath_win32()
except:
userrc = os.path.join(os.path.expanduser('~'), 'mercurial.ini')
path = [userrc]
userprofile = os.environ.get('USERPROFILE')
if userprofile:
path.append(os.path.join(userprofile, 'mercurial.ini'))
return path
def parse_patch_output(output_line):
"""parses the output produced by patch and returns the file name"""
pf = output_line[14:]
if pf[0] == '`':
pf = pf[1:-1] # Remove the quotes
return pf
def testpid(pid):
'''return False if pid dead, True if running or not known'''
return True
def set_exec(f, mode):
pass
def set_link(f, mode):
pass
def set_binary(fd):
msvcrt.setmode(fd.fileno(), os.O_BINARY)
def pconvert(path):
return path.replace("\\", "/")
def localpath(path):
return path.replace('/', '\\')
def normpath(path):
return pconvert(os.path.normpath(path))
makelock = _makelock_file
readlock = _readlock_file
def samestat(s1, s2):
return False
# A sequence of backslashes is special iff it precedes a double quote:
# - if there's an even number of backslashes, the double quote is not
# quoted (i.e. it ends the quoted region)
# - if there's an odd number of backslashes, the double quote is quoted
# - in both cases, every pair of backslashes is unquoted into a single
# backslash
# (See http://msdn2.microsoft.com/en-us/library/a1y7w461.aspx )
# So, to quote a string, we must surround it in double quotes, double
# the number of backslashes that preceed double quotes and add another
# backslash before every double quote (being careful with the double
# quote we've appended to the end)
_quotere = None
def shellquote(s):
global _quotere
if _quotere is None:
_quotere = re.compile(r'(\\*)("|\\$)')
return '"%s"' % _quotere.sub(r'\1\1\\\2', s)
def quotecommand(cmd):
"""Build a command string suitable for os.popen* calls."""
# The extra quotes are needed because popen* runs the command
# through the current COMSPEC. cmd.exe suppress enclosing quotes.
return '"' + cmd + '"'
def explain_exit(code):
return _("exited with status %d") % code, code
# if you change this stub into a real check, please try to implement the
# username and groupname functions above, too.
def isowner(fp, st=None):
return True
def find_in_path(name, path, default=None):
'''find name in search path. path can be string (will be split
with os.pathsep), or iterable thing that returns strings. if name
found, return path to name. else return default. name is looked up
using cmd.exe rules, using PATHEXT.'''
if isinstance(path, str):
path = path.split(os.pathsep)
pathext = os.environ.get('PATHEXT', '.COM;.EXE;.BAT;.CMD')
pathext = pathext.lower().split(os.pathsep)
isexec = os.path.splitext(name)[1].lower() in pathext
for p in path:
p_name = os.path.join(p, name)
if isexec and os.path.exists(p_name):
return p_name
for ext in pathext:
p_name_ext = p_name + ext
if os.path.exists(p_name_ext):
return p_name_ext
return default
def set_signal_handler():
try:
set_signal_handler_win32()
except NameError:
pass
try:
# override functions with win32 versions if possible
from util_win32 import *
if not is_win_9x():
posixfile = posixfile_nt
except ImportError:
pass
else:
nulldev = '/dev/null'
def rcfiles(path):
rcs = [os.path.join(path, 'hgrc')]
rcdir = os.path.join(path, 'hgrc.d')
try:
rcs.extend([os.path.join(rcdir, f) for f in os.listdir(rcdir)
if f.endswith(".rc")])
except OSError:
pass
return rcs
def system_rcpath():
path = []
# old mod_python does not set sys.argv
if len(getattr(sys, 'argv', [])) > 0:
path.extend(rcfiles(os.path.dirname(sys.argv[0]) +
'/../etc/mercurial'))
path.extend(rcfiles('/etc/mercurial'))
return path
def user_rcpath():
return [os.path.expanduser('~/.hgrc')]
def parse_patch_output(output_line):
"""parses the output produced by patch and returns the file name"""
pf = output_line[14:]
if os.sys.platform == 'OpenVMS':
if pf[0] == '`':
pf = pf[1:-1] # Remove the quotes
else:
if pf.startswith("'") and pf.endswith("'") and " " in pf:
pf = pf[1:-1] # Remove the quotes
return pf
def is_exec(f):
"""check whether a file is executable"""
return (os.lstat(f).st_mode & 0100 != 0)
def set_exec(f, mode):
s = os.lstat(f).st_mode
if (s & 0100 != 0) == mode:
return
if mode:
# Turn on +x for every +r bit when making a file executable
# and obey umask.
os.chmod(f, s | (s & 0444) >> 2 & ~_umask)
else:
os.chmod(f, s & 0666)
def set_link(f, mode):
"""make a file a symbolic link/regular file
if a file is changed to a link, its contents become the link data
if a link is changed to a file, its link data become its contents
"""
m = os.path.islink(f)
if m == bool(mode):
return
if mode: # switch file to link
data = file(f).read()
os.unlink(f)
os.symlink(data, f)
else:
data = os.readlink(f)
os.unlink(f)
file(f, "w").write(data)
def set_binary(fd):
pass
def pconvert(path):
return path
def localpath(path):
return path
normpath = os.path.normpath
samestat = os.path.samestat
def makelock(info, pathname):
try:
os.symlink(info, pathname)
except OSError, why:
if why.errno == errno.EEXIST:
raise
else:
_makelock_file(info, pathname)
def readlock(pathname):
try:
return os.readlink(pathname)
except OSError, why:
if why.errno in (errno.EINVAL, errno.ENOSYS):
return _readlock_file(pathname)
else:
raise
def shellquote(s):
if os.sys.platform == 'OpenVMS':
return '"%s"' % s
else:
return "'%s'" % s.replace("'", "'\\''")
def quotecommand(cmd):
return cmd
def testpid(pid):
'''return False if pid dead, True if running or not sure'''
if os.sys.platform == 'OpenVMS':
return True
try:
os.kill(pid, 0)
return True
except OSError, inst:
return inst.errno != errno.ESRCH
def explain_exit(code):
"""return a 2-tuple (desc, code) describing a process's status"""
if os.WIFEXITED(code):
val = os.WEXITSTATUS(code)
return _("exited with status %d") % val, val
elif os.WIFSIGNALED(code):
val = os.WTERMSIG(code)
return _("killed by signal %d") % val, val
elif os.WIFSTOPPED(code):
val = os.WSTOPSIG(code)
return _("stopped by signal %d") % val, val
raise ValueError(_("invalid exit code"))
def isowner(fp, st=None):
"""Return True if the file object f belongs to the current user.
The return value of a util.fstat(f) may be passed as the st argument.
"""
if st is None:
st = fstat(fp)
return st.st_uid == os.getuid()
def find_in_path(name, path, default=None):
'''find name in search path. path can be string (will be split
with os.pathsep), or iterable thing that returns strings. if name
found, return path to name. else return default.'''
if isinstance(path, str):
path = path.split(os.pathsep)
for p in path:
p_name = os.path.join(p, name)
if os.path.exists(p_name):
return p_name
return default
def set_signal_handler():
pass
def find_exe(name, default=None):
'''find path of an executable.
if name contains a path component, return it as is. otherwise,
use normal executable search path.'''
if os.sep in name or sys.platform == 'OpenVMS':
# don't check the executable bit. if the file isn't
# executable, whoever tries to actually run it will give a
# much more useful error message.
return name
return find_in_path(name, os.environ.get('PATH', ''), default=default)
def _buildencodefun():
e = '_'
win_reserved = [ord(x) for x in '\\:*?"<>|']
cmap = dict([ (chr(x), chr(x)) for x in xrange(127) ])
for x in (range(32) + range(126, 256) + win_reserved):
cmap[chr(x)] = "~%02x" % x
for x in range(ord("A"), ord("Z")+1) + [ord(e)]:
cmap[chr(x)] = e + chr(x).lower()
dmap = {}
for k, v in cmap.iteritems():
dmap[v] = k
def decode(s):
i = 0
while i < len(s):
for l in xrange(1, 4):
try:
yield dmap[s[i:i+l]]
i += l
break
except KeyError:
pass
else:
raise KeyError
return (lambda s: "".join([cmap[c] for c in s]),
lambda s: "".join(list(decode(s))))
encodefilename, decodefilename = _buildencodefun()
def encodedopener(openerfn, fn):
def o(path, *args, **kw):
return openerfn(fn(path), *args, **kw)
return o
def mktempcopy(name, emptyok=False):
"""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.
try:
st_mode = os.lstat(name).st_mode
except OSError, inst:
if inst.errno != errno.ENOENT:
raise
st_mode = 0666 & ~_umask
os.chmod(temp, st_mode)
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:
try: os.unlink(temp)
except: pass
raise
return temp
class atomictempfile(posixfile):
"""file-like object that atomically updates a file
All writes will be redirected to a temporary copy of the original
file. When rename is called, the copy is renamed to the original
name, making the changes visible.
"""
def __init__(self, name, mode):
self.__name = name
self.temp = mktempcopy(name, emptyok=('w' in mode))
posixfile.__init__(self, self.temp, mode)
def rename(self):
if not self.closed:
posixfile.close(self)
rename(self.temp, localpath(self.__name))
def __del__(self):
if not self.closed:
try:
os.unlink(self.temp)
except: pass
posixfile.close(self)
class opener(object):
"""Open files relative to a base directory
This class is used to hide the details of COW semantics and
remote file access from higher level code.
"""
def __init__(self, base, audit=True):
self.base = base
if audit:
self.audit_path = path_auditor(base)
else:
self.audit_path = always
def __getattr__(self, name):
if name == '_can_symlink':
self._can_symlink = checklink(self.base)
return self._can_symlink
raise AttributeError(name)
def __call__(self, path, mode="r", text=False, atomictemp=False):
self.audit_path(path)
f = os.path.join(self.base, path)
if not text and "b" not in mode:
mode += "b" # for that other OS
if mode[0] != "r":
try:
nlink = nlinks(f)
except OSError:
nlink = 0
d = os.path.dirname(f)
if not os.path.isdir(d):
os.makedirs(d)
if atomictemp:
return atomictempfile(f, mode)
if nlink > 1:
rename(mktempcopy(f), f)
return posixfile(f, mode)
def symlink(self, src, dst):
self.audit_path(dst)
linkname = os.path.join(self.base, dst)
try:
os.unlink(linkname)
except OSError:
pass
dirname = os.path.dirname(linkname)
if not os.path.exists(dirname):
os.makedirs(dirname)
if self._can_symlink:
try:
os.symlink(src, linkname)
except OSError, err:
raise OSError(err.errno, _('could not symlink to %r: %s') %
(src, err.strerror), linkname)
else:
f = self(dst, "w")
f.write(src)
f.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, targetsize = 2**16):
"""in_iter is the iterator that's iterating over the input chunks.
targetsize is how big a buffer to try to maintain."""
self.in_iter = iter(in_iter)
self.buf = ''
self.targetsize = int(targetsize)
if self.targetsize <= 0:
raise ValueError(_("targetsize must be greater than 0, was %d") %
targetsize)
self.iterempty = False
def fillbuf(self):
"""Ignore target size; read every chunk from iterator until empty."""
if not self.iterempty:
collector = cStringIO.StringIO()
collector.write(self.buf)
for ch in self.in_iter:
collector.write(ch)
self.buf = collector.getvalue()
self.iterempty = True
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."""
if l > len(self.buf) and not self.iterempty:
# Clamp to a multiple of self.targetsize
targetsize = self.targetsize * ((l // self.targetsize) + 1)
collector = cStringIO.StringIO()
collector.write(self.buf)
collected = len(self.buf)
for chunk in self.in_iter:
collector.write(chunk)
collected += len(chunk)
if collected >= targetsize:
break
if collected < targetsize:
self.iterempty = True
self.buf = collector.getvalue()
s, self.buf = self.buf[:l], buffer(self.buf, l)
return s
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():
lt = time.localtime()
if lt[8] == 1 and time.daylight:
tz = time.altzone
else:
tz = time.timezone
return time.mktime(lt), tz
def datestr(date=None, format='%a %b %d %H:%M:%S %Y', timezone=True, timezone_format=" %+03d%02d"):
"""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()
s = time.strftime(format, time.gmtime(float(t) - tz))
if timezone:
s += timezone_format % (-tz / 3600, ((-tz % 3600) / 60))
return s
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():
tz = int(tz)
offset = - 3600 * (tz / 100) - 60 * (tz % 100)
return offset
if tz == "GMT" or tz == "UTC":
return 0
return None
# NOTE: unixtime = localunixtime + offset
offset, date = timezone(string), string
if offset != None:
date = " ".join(string.split()[:-1])
# add missing elements from defaults
for part in defaults:
found = [True for p in part if ("%"+p) in format]
if not found:
date += "@" + defaults[part]
format += "@%" + part[0]
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(string, formats=None, defaults=None):
"""parse a localized time string and return a (unixtime, offset) tuple.
The date may be a "unixtime offset" string or in one of the specified
formats."""
if not string:
return 0, 0
if not formats:
formats = defaultdateformats
string = string.strip()
try:
when, offset = map(int, string.split(' '))
except ValueError:
# fill out defaults
if not defaults:
defaults = {}
now = makedate()
for part in "d mb yY HI M S".split():
if part not in defaults:
if part[0] in "HMS":
defaults[part] = "00"
elif part[0] in "dm":
defaults[part] = "1"
else:
defaults[part] = datestr(now, "%" + part[0], False)
for format in formats:
try:
when, offset = strdate(string, format, defaults)
except ValueError:
pass
else:
break
else:
raise Abort(_('invalid date: %r ') % string)
# 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 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
"""
def lower(date):
return parsedate(date, extendeddateformats)[0]
def upper(date):
d = dict(mb="12", HI="23", M="59", S="59")
for days in "31 30 29".split():
try:
d["d"] = days
return parsedate(date, extendeddateformats, d)[0]
except:
pass
d["d"] = "28"
return parsedate(date, extendeddateformats, d)[0]
if date[0] == "<":
when = upper(date[1:])
return lambda x: x <= when
elif date[0] == ">":
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:])
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 ellipsis(text, maxlength=400):
"""Trim string to at most maxlength (default: 400) characters."""
if len(text) <= maxlength:
return text
else:
return "%s..." % (text[:maxlength-3])
def walkrepos(path):
'''yield every hg repository under path, recursively.'''
def errhandler(err):
if err.filename == path:
raise err
for root, dirs, files in os.walk(path, onerror=errhandler):
for d in dirs:
if d == '.hg':
yield root
dirs[:] = []
break
_rcpath = None
def os_rcpath():
'''return default os-specific hgrc search path'''
path = system_rcpath()
path.extend(user_rcpath())
path = [os.path.normpath(f) for f in path]
return path
def rcpath():
'''return hgrc search path. if env var HGRCPATH is set, use it.
for each item in path, if directory, use files ending in .rc,
else use item.
make HGRCPATH empty to only look in .hg/hgrc of current repo.
if no HGRCPATH, use default os-specific path.'''
global _rcpath
if _rcpath is None:
if 'HGRCPATH' in os.environ:
_rcpath = []
for p in os.environ['HGRCPATH'].split(os.pathsep):
if not p: continue
if os.path.isdir(p):
for f in os.listdir(p):
if f.endswith('.rc'):
_rcpath.append(os.path.join(p, f))
else:
_rcpath.append(p)
else:
_rcpath = os_rcpath()
return _rcpath
def bytecount(nbytes):
'''return byte count formatted as readable string, with units'''
units = (
(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')),
)
for multiplier, divisor, format in units:
if nbytes >= divisor * multiplier:
return format % (nbytes / float(divisor))
return units[-1][2] % nbytes
def drop_scheme(scheme, path):
sc = scheme + ':'
if path.startswith(sc):
path = path[len(sc):]
if path.startswith('//'):
path = path[2:]
return path
def uirepr(s):
# Avoid double backslash in Windows path repr()
return repr(s).replace('\\\\', '\\')