"""
util.py - Mercurial utility functions and platform specfic implementations
Copyright 2005 K. Thananchayan <thananck@yahoo.com>
Copyright 2005, 2006 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
import os, threading, time, calendar, ConfigParser, locale
_encoding = os.environ.get("HGENCODING") or locale.getpreferredencoding() \
or "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
HG_ENCODINGMODE, 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!\n") % (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',
'%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."""
# like SafeConfigParser but with case-sensitive keys
class configparser(ConfigParser.SafeConfigParser):
def optionxform(self, optionstr):
return optionstr
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'''
(pout, pin) = popen2.popen2(cmd, -1, '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 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 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 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 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(n1, n2):
'''return the relative path from one place to another.
n1 should use os.sep to separate directories
n2 should use "/" to separate directories
returns an os.sep-separated path.
'''
if not n1: return localpath(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)
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):
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=[], head='', src=None):
return _matcher(canonroot, cwd, names, inc, exc, head, 'glob', src)
def cmdmatcher(canonroot, cwd='', names=['.'], inc=[], exc=[], head='', src=None):
if os.name == 'nt':
dflt_pat = 'glob'
else:
dflt_pat = 'relpath'
return _matcher(canonroot, cwd, names, inc, exc, head, dflt_pat, src)
def _matcher(canonroot, cwd, names, inc, exc, head, 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
head - a regex to prepend to patterns to control whether a match is rooted
a pattern is one of:
'glob:<rooted glob>'
're:<rooted regexp>'
'path:<rooted path>'
'relglob:<relative glob>'
'relpath:<relative path>'
'relre:<relative regexp>'
'<rooted path or regexp>'
returns:
a 3-tuple containing
- list of explicit non-pattern names passed in
- a bool match(filename) function
- a bool indicating if any patterns were passed in
todo:
make head regex a rooted bool
"""
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 kind == 're':
return name
elif kind == 'path':
return '^' + re.escape(name) + '(?:/|$)'
elif kind == 'relglob':
return head + globre(name, '(?:|.*/)', tail)
elif kind == 'relpath':
return head + re.escape(name) + tail
elif kind == 'relre':
if name.startswith('^'):
return name
return '.*' + name
return head + globre(name, '', tail)
def matchfn(pats, tail):
"""build a matching function from a set of patterns"""
if not pats:
return
matches = []
for k, p in pats:
try:
pat = '(?:%s)' % regex(k, p, tail)
matches.append(re.compile(pat).match)
except re.error:
if src: raise Abort("%s: invalid pattern (%s): %s" % (src, k, p))
else: raise Abort("invalid pattern (%s): %s" % (k, p))
def buildfn(text):
for m in matches:
r = m(text)
if r:
return r
return buildfn
def globprefix(pat):
'''return the non-glob prefix of a path, e.g. foo/* -> foo'''
root = []
for p in pat.split(os.sep):
if contains_glob(p): break
root.append(p)
return '/'.join(root)
pats = []
files = []
roots = []
for kind, name in [patkind(p, dflt_pat) for p in names]:
if kind in ('glob', 'relpath'):
name = canonpath(canonroot, cwd, name)
if name == '':
kind, name = 'glob', '**'
if kind in ('glob', 'path', 're'):
pats.append((kind, name))
if kind == 'glob':
root = globprefix(name)
if root: roots.append(root)
elif kind == 'relpath':
files.append((kind, name))
roots.append(name)
patmatch = matchfn(pats, '$') or always
filematch = matchfn(files, '(?:/|$)') or always
incmatch = always
if inc:
inckinds = [patkind(canonpath(canonroot, cwd, i)) for i in inc]
incmatch = matchfn(inckinds, '(?:/|$)')
excmatch = lambda fn: False
if exc:
exckinds = [patkind(canonpath(canonroot, cwd, x)) for x in exc]
excmatch = matchfn(exckinds, '(?:/|$)')
return (roots,
lambda fn: (incmatch(fn) and not excmatch(fn) and
(fn.endswith('/') or
(not pats and not files) or
(pats and patmatch(fn)) or
(files and filematch(fn)))),
(inc or exc or (pats and pats != [('glob', '**')])) and True)
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)
if cwd is not None and oldcwd != cwd:
os.chdir(cwd)
rc = os.system(cmd)
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)
def rename(src, dst):
"""forcibly rename a file"""
try:
os.rename(src, dst)
except OSError, err:
# 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"
try:
shutil.copyfile(src, dest)
shutil.copymode(src, dest)
except shutil.Error, inst:
raise util.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)
def audit_path(path):
"""Abort if path contains dangerous components"""
parts = os.path.normcase(path).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\n") % path)
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)
"""
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)
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: is_link(os.path.join(path, x))
return fallback
# 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')
sys.stdout = winstdout(sys.stdout)
def system_rcpath():
try:
return system_rcpath_win32()
except:
return [r'c:\mercurial\mercurial.ini']
def os_rcpath():
'''return default os-specific hgrc search path'''
path = system_rcpath()
path.append(user_rcpath())
userprofile = os.environ.get('USERPROFILE')
if userprofile:
path.append(os.path.join(userprofile, 'mercurial.ini'))
return path
def user_rcpath():
'''return os-specific hgrc search path to the user dir'''
return os.path.join(os.path.expanduser('~'), 'mercurial.ini')
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
def shellquote(s):
return '"%s"' % s.replace('"', '\\"')
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
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'
_umask = os.umask(0)
os.umask(_umask)
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 os_rcpath():
'''return default os-specific hgrc search path'''
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'))
path.append(os.path.expanduser('~/.hgrc'))
path = [os.path.normpath(f) for f in path]
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.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 is_link(f):
"""check whether a file is a symlink"""
return (os.lstat(f).st_mode & 0120000 == 0120000)
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 = is_link(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 == errno.EINVAL:
return _readlock_file(pathname)
else:
raise
def shellquote(s):
return "'%s'" % s.replace("'", "'\\''")
def testpid(pid):
'''return False if pid dead, True if running or not sure'''
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 _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 opener(base, audit=True):
"""
return a function that opens files relative to base
this function is used to hide the details of COW semantics and
remote file access from higher level code.
"""
p = base
audit_p = audit
def mktempcopy(name):
d, fn = os.path.split(name)
fd, temp = tempfile.mkstemp(prefix='.%s-' % fn, dir=d)
os.close(fd)
ofp = posixfile(temp, "wb")
try:
try:
ifp = posixfile(name, "rb")
except IOError, inst:
if not getattr(inst, 'filename', None):
inst.filename = name
raise
for chunk in filechunkiter(ifp):
ofp.write(chunk)
ifp.close()
ofp.close()
except:
try: os.unlink(temp)
except: pass
raise
st = os.lstat(name)
os.chmod(temp, st.st_mode)
return temp
class atomictempfile(posixfile):
"""the file will only be copied when rename is called"""
def __init__(self, name, mode):
self.__name = name
self.temp = mktempcopy(name)
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 atomicfile(atomictempfile):
"""the file will only be copied on close"""
def __init__(self, name, mode):
atomictempfile.__init__(self, name, mode)
def close(self):
self.rename()
def __del__(self):
self.rename()
def o(path, mode="r", text=False, atomic=False, atomictemp=False):
if audit_p:
audit_path(path)
f = os.path.join(p, path)
if not text:
mode += "b" # for that other OS
if mode[0] != "r":
try:
nlink = nlinks(f)
except OSError:
d = os.path.dirname(f)
if not os.path.isdir(d):
os.makedirs(d)
else:
if atomic:
return atomicfile(f, mode)
elif atomictemp:
return atomictempfile(f, mode)
if nlink > 1:
rename(mktempcopy(f), f)
return posixfile(f, mode)
return o
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):
"""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 += " %+03d%02d" % (-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 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