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# -*- coding: ascii -*-
#
# Copyright 2007 - 2013
# Andr\xe9 Malo or his licensors, as applicable
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
=================
Shell utilities
=================
Shell utilities.
"""
from __future__ import generators
__author__ = u"Andr\xe9 Malo"
__docformat__ = "restructuredtext en"
import errno as _errno
import fnmatch as _fnmatch
import os as _os
import shutil as _shutil
import sys as _sys
import tempfile as _tempfile
cwd = _os.path.dirname(_os.path.abspath(_sys.argv[0]))
class ExitError(RuntimeError):
""" Exit error """
def __init__(self, code):
RuntimeError.__init__(self, code)
self.code = code
self.signal = None
class SignalError(ExitError):
""" Signal error """
def __init__(self, code, signal):
ExitError.__init__(self, code)
import signal as _signal
self.signal = signal
for key, val in vars(_signal).iteritems():
if key.startswith('SIG') and not key.startswith('SIG_'):
if val == signal:
self.signalstr = key[3:]
break
else:
self.signalstr = '%04d' % signal
def native(path):
""" Convert slash path to native """
path = _os.path.sep.join(path.split('/'))
return _os.path.normpath(_os.path.join(cwd, path))
def cp(src, dest):
""" Copy src to dest """
_shutil.copy2(native(src), native(dest))
def cp_r(src, dest):
""" Copy -r src to dest """
_shutil.copytree(native(src), native(dest))
def rm(dest):
""" Remove a file """
try:
_os.unlink(native(dest))
except OSError, e:
if _errno.ENOENT != e.errno:
raise
def rm_rf(dest):
""" Remove a tree """
dest = native(dest)
if _os.path.exists(dest):
for path in files(dest, '*'):
_os.chmod(native(path), 0644)
_shutil.rmtree(dest)
try:
mkstemp = _tempfile.mkstemp
except AttributeError:
# helpers stolen from 2.4 tempfile module
try:
import fcntl as _fcntl
except ImportError:
def _set_cloexec(fd):
""" Set close-on-exec (not implemented, but not an error) """
# pylint: disable = W0613
pass
else:
def _set_cloexec(fd):
""" Set close-on-exec """
try:
flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
except IOError:
pass
else:
# flags read successfully, modify
flags |= _fcntl.FD_CLOEXEC
_fcntl.fcntl(fd, _fcntl.F_SETFD, flags)
_text_openflags = _os.O_RDWR | _os.O_CREAT | _os.O_EXCL
_text_openflags |= getattr(_os, 'O_NOINHERIT', 0)
_text_openflags |= getattr(_os, 'O_NOFOLLOW', 0)
_bin_openflags = _text_openflags
_bin_openflags |= getattr(_os, 'O_BINARY', 0)
def mkstemp(suffix="", prefix=_tempfile.gettempprefix(), dir=None,
text=False):
""" Create secure temp file """
# pylint: disable = W0622
if dir is None:
dir = _tempfile.gettempdir()
if text:
flags = _text_openflags
else:
flags = _bin_openflags
count = 100
while count > 0:
j = _tempfile._counter.get_next() # pylint: disable = E1101, W0212
fname = _os.path.join(dir, prefix + str(j) + suffix)
try:
fd = _os.open(fname, flags, 0600)
except OSError, e:
if e.errno == _errno.EEXIST:
count -= 1
continue
raise
_set_cloexec(fd)
return fd, _os.path.abspath(fname)
raise IOError, (_errno.EEXIST, "No usable temporary file name found")
def _pipespawn(argv, env):
""" Pipe spawn """
# pylint: disable = R0912
import pickle as _pickle
fd, name = mkstemp('.py')
try:
_os.write(fd, (r"""
import os
import pickle
try:
import subprocess
except ImportError:
subprocess = None
import sys
argv = pickle.loads(%(argv)s)
env = pickle.loads(%(env)s)
if 'X_JYTHON_WA_PATH' in env:
env['PATH'] = env['X_JYTHON_WA_PATH']
if subprocess is None:
pid = os.spawnve(os.P_NOWAIT, argv[0], argv, env)
result = os.waitpid(pid, 0)[1]
else:
p = subprocess.Popen(argv, env=env)
result = p.wait()
if result < 0:
print "\n%%d 1" %% (-result)
sys.exit(2)
if result == 0:
sys.exit(0)
signalled = getattr(os, 'WIFSIGNALED', None)
if signalled is not None:
if signalled(result):
print "\n%%d %%d" %% (os.WTERMSIG(result), result & 7)
sys.exit(2)
print "\n%%d" %% (result & 7,)
sys.exit(3)
""".strip() + "\n") % {
'argv': repr(_pickle.dumps(argv)),
'env': repr(_pickle.dumps(env)),
})
fd, _ = None, _os.close(fd)
if _sys.platform == 'win32':
argv = []
for arg in [_sys.executable, name]:
if ' ' in arg or arg.startswith('"'):
arg = '"%s"' % arg.replace('"', '\\"')
argv.append(arg)
argv = ' '.join(argv)
shell = True
close_fds = False
else:
argv = [_sys.executable, name]
shell = False
close_fds = True
res = 0
try:
import subprocess
except ImportError:
import popen2 as _popen2
proc = _popen2.Popen3(argv, False)
try:
proc.tochild.close()
result = proc.fromchild.read()
finally:
res = proc.wait()
else:
if 'X_JYTHON_WA_PATH' in env:
env['PATH'] = env['X_JYTHON_WA_PATH']
proc = subprocess.Popen(argv,
shell=shell,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
close_fds=close_fds,
env=env,
)
try:
proc.stdin.close()
result = proc.stdout.read()
finally:
res = proc.wait()
if res != 0:
if res == 2:
signal, code = map(int, result.splitlines()[-1].split())
raise SignalError(code, signal)
elif res == 3:
code = int(result.splitlines()[-1].strip())
raise ExitError(code)
raise ExitError(res)
return result
finally:
try:
if fd is not None:
_os.close(fd)
finally:
_os.unlink(name)
def _filepipespawn(infile, outfile, argv, env):
""" File Pipe spawn """
try:
import subprocess
except ImportError:
subprocess = None
import pickle as _pickle
fd, name = mkstemp('.py')
try:
_os.write(fd, ("""
import os
import pickle
import sys
infile = pickle.loads(%(infile)s)
outfile = pickle.loads(%(outfile)s)
argv = pickle.loads(%(argv)s)
env = pickle.loads(%(env)s)
if infile is not None:
infile = open(infile, 'rb')
os.dup2(infile.fileno(), 0)
infile.close()
if outfile is not None:
outfile = open(outfile, 'wb')
os.dup2(outfile.fileno(), 1)
outfile.close()
pid = os.spawnve(os.P_NOWAIT, argv[0], argv, env)
result = os.waitpid(pid, 0)[1]
sys.exit(result & 7)
""".strip() + "\n") % {
'infile': repr(_pickle.dumps(_os.path.abspath(infile))),
'outfile': repr(_pickle.dumps(_os.path.abspath(outfile))),
'argv': repr(_pickle.dumps(argv)),
'env': repr(_pickle.dumps(env)),
})
fd, _ = None, _os.close(fd)
if _sys.platform == 'win32':
argv = []
for arg in [_sys.executable, name]:
if ' ' in arg or arg.startswith('"'):
arg = '"%s"' % arg.replace('"', '\\"')
argv.append(arg)
argv = ' '.join(argv)
close_fds = False
shell = True
else:
argv = [_sys.executable, name]
close_fds = True
shell = False
if subprocess is None:
pid = _os.spawnve(_os.P_NOWAIT, argv[0], argv, env)
return _os.waitpid(pid, 0)[1]
else:
p = subprocess.Popen(
argv, env=env, shell=shell, close_fds=close_fds
)
return p.wait()
finally:
try:
if fd is not None:
_os.close(fd)
finally:
_os.unlink(name)
def spawn(*argv, **kwargs):
""" Spawn a process """
try:
import subprocess
except ImportError:
subprocess = None
if _sys.platform == 'win32':
newargv = []
for arg in argv:
if not arg or ' ' in arg or arg.startswith('"'):
arg = '"%s"' % arg.replace('"', '\\"')
newargv.append(arg)
argv = newargv
close_fds = False
shell = True
else:
close_fds = True
shell = False
env = kwargs.get('env')
if env is None:
env = dict(_os.environ)
if 'X_JYTHON_WA_PATH' in env:
env['PATH'] = env['X_JYTHON_WA_PATH']
echo = kwargs.get('echo')
if echo:
print ' '.join(argv)
filepipe = kwargs.get('filepipe')
if filepipe:
return _filepipespawn(
kwargs.get('stdin'), kwargs.get('stdout'), argv, env
)
pipe = kwargs.get('stdout')
if pipe:
return _pipespawn(argv, env)
if subprocess is None:
pid = _os.spawnve(_os.P_NOWAIT, argv[0], argv, env)
return _os.waitpid(pid, 0)[1]
else:
p = subprocess.Popen(argv, env=env, shell=shell, close_fds=close_fds)
return p.wait()
try:
walk = _os.walk
except AttributeError:
# copy from python 2.4 sources (modulo docs and comments)
def walk(top, topdown=True, onerror=None):
""" directory tree walker """
# pylint: disable = C0103
join, isdir, islink = _os.path.join, _os.path.isdir, _os.path.islink
listdir, error = _os.listdir, _os.error
try:
names = listdir(top)
except error, err:
if onerror is not None:
onerror(err)
return
dirs, nondirs = [], []
for name in names:
if isdir(join(top, name)):
dirs.append(name)
else:
nondirs.append(name)
if topdown:
yield top, dirs, nondirs
for name in dirs:
path = join(top, name)
if not islink(path):
for x in walk(path, topdown, onerror):
yield x
if not topdown:
yield top, dirs, nondirs
def files(base, wildcard='[!.]*', recursive=1, prune=('.git', '.svn', 'CVS')):
""" Determine a filelist """
for dirpath, dirnames, filenames in walk(native(base)):
for item in prune:
if item in dirnames:
dirnames.remove(item)
filenames.sort()
for name in _fnmatch.filter(filenames, wildcard):
dest = _os.path.join(dirpath, name)
if dest.startswith(cwd):
dest = dest.replace(cwd, '', 1)
aslist = []
head, tail = _os.path.split(dest)
while tail:
aslist.append(tail)
head, tail = _os.path.split(head)
aslist.reverse()
dest = '/'.join(aslist)
yield dest
if not recursive:
break
dirnames.sort()
def dirs(base, wildcard='[!.]*', recursive=1, prune=('.git', '.svn', 'CVS')):
""" Determine a filelist """
for dirpath, dirnames, filenames in walk(native(base)):
for item in prune:
if item in dirnames:
dirnames.remove(item)
dirnames.sort()
for name in _fnmatch.filter(dirnames, wildcard):
dest = _os.path.join(dirpath, name)
if dest.startswith(cwd):
dest = dest.replace(cwd, '', 1)
aslist = []
head, tail = _os.path.split(dest)
while tail:
aslist.append(tail)
head, tail = _os.path.split(head)
aslist.reverse()
dest = '/'.join(aslist)
yield dest
if not recursive:
break
def frompath(executable):
""" Find executable in PATH """
# Based on distutils.spawn.find_executable.
path = _os.environ.get('PATH', '')
paths = [
_os.path.expanduser(item)
for item in path.split(_os.pathsep)
]
ext = _os.path.splitext(executable)[1]
exts = ['']
if _sys.platform == 'win32' or _os.name == 'os2':
eext = ['.exe', '.bat', '.py']
if ext not in eext:
exts.extend(eext)
for ext in exts:
if not _os.path.isfile(executable + ext):
for path in paths:
fname = _os.path.join(path, executable + ext)
if _os.path.isfile(fname):
# the file exists, we have a shot at spawn working
return fname
else:
return executable + ext
return None
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