/usr/share/pyshared/bitten/build/api.py is in trac-bitten-slave 0.6+final-3.
This file is owned by root:root, with mode 0o644.
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#
# Copyright (C) 2005-2007 Christopher Lenz <cmlenz@gmx.de>
# Copyright (C) 2007-2010 Edgewall Software
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://bitten.edgewall.org/wiki/License.
"""Functions and classes used to simplify the implementation recipe commands."""
import logging
import fnmatch
import os
import shlex
import time
import subprocess
import sys
log = logging.getLogger('bitten.build.api')
__docformat__ = 'restructuredtext en'
class BuildError(Exception):
"""Exception raised when a build fails."""
class TimeoutError(Exception):
"""Exception raised when the execution of a command times out."""
def _encode(text):
"""Encode input for call. Input must be unicode or utf-8 string."""
if not isinstance(text, unicode):
text = unicode(text, 'utf-8')
# sys.stdin.encoding might be None (if stdin is directed from a file)
# sys.stdin.encoding might be missing (if it is a StringIO object)
encoding = sys.getfilesystemencoding() or \
getattr(sys.stdin, 'encoding', None) or 'utf-8'
return text.encode(encoding, 'replace')
def _decode(text):
"""Decode output from call."""
try:
return text.decode('utf-8')
except UnicodeDecodeError:
# sys.stdout.encoding might be None (if stdout is directed to a file)
# sys.stdout.encoding might be missing (if it is a StringIO object)
encoding = getattr(sys.stdout, 'encoding', None) or 'utf-8'
return text.decode(encoding, 'replace')
class CommandLine(object):
"""Simple helper for executing subprocesses."""
def __init__(self, executable, args, input=None, cwd=None, shell=False):
"""Initialize the CommandLine object.
:param executable: the name of the program to execute
:param args: a list of arguments to pass to the executable
:param input: string or file-like object containing any input data for
the program
:param cwd: the working directory to change to before executing the
command
"""
self.executable = executable
self.arguments = [_encode(arg) for arg in args]
self.input = input
self.cwd = cwd
if self.cwd:
assert os.path.isdir(self.cwd)
self.shell = shell
self.returncode = None
def execute(self, timeout=None):
"""Execute the command, and return a generator for iterating over
the output written to the standard output and error streams.
:param timeout: number of seconds before the external process
should be aborted (not supported on Windows without
``subprocess`` module / Python 2.4+)
"""
from threading import Thread
from Queue import Queue, Empty
def reader(pipe, pipe_name, queue):
while pipe and not pipe.closed:
line = pipe.readline()
if line == '':
break
queue.put((pipe_name, line))
if not pipe.closed:
pipe.close()
def writer(pipe, data):
if data and pipe and not pipe.closed:
pipe.write(data)
if not pipe.closed:
pipe.close()
args = [self.executable] + self.arguments
try:
p = subprocess.Popen(args, bufsize=1, # Line buffered
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=(self.cwd or None),
shell=self.shell,
universal_newlines=True,
env=None)
except Exception, e:
raise BuildError('Error executing %s: %s %s' % (args,
e.__class__.__name__, str(e)))
log.debug('Executing %s, (pid = %s, timeout = %s)', args, p.pid, timeout)
if self.input:
if isinstance(self.input, basestring):
in_data = self.input
else:
in_data = self.input.read()
else:
in_data = None
queue = Queue()
limit = timeout and timeout + time.time() or 0
pipe_in = Thread(target=writer, args=(p.stdin, in_data))
pipe_out = Thread(target=reader, args=(p.stdout, 'stdout', queue))
pipe_err = Thread(target=reader, args=(p.stderr, 'stderr', queue))
pipe_err.start(); pipe_out.start(); pipe_in.start()
while True:
if limit and limit < time.time():
if hasattr(p, 'kill'): # Python 2.6+
log.debug('Killing process.')
p.kill()
raise TimeoutError('Command %s timed out' % self.executable)
if p.poll() != None and self.returncode == None:
self.returncode = p.returncode
try:
name, line = queue.get(block=True, timeout=.01)
line = line and _decode(line.rstrip().replace('\x00', ''))
if name == 'stderr':
yield (None, line)
else:
yield (line, None)
except Empty:
if self.returncode != None:
break
pipe_out.join(); pipe_in.join(); pipe_err.join()
log.debug('%s exited with code %s', self.executable,
self.returncode)
class FileSet(object):
"""Utility class for collecting a list of files in a directory that match
given name/path patterns."""
DEFAULT_EXCLUDES = ['CVS/*', '*/CVS/*', '.svn/*', '*/.svn/*',
'.DS_Store', 'Thumbs.db']
def __init__(self, basedir, include=None, exclude=None):
"""Create a file set.
:param basedir: the base directory for all files in the set
:param include: a list of patterns that define which files should be
included in the set
:param exclude: a list of patterns that define which files should be
excluded from the set
"""
self.files = []
self.basedir = basedir
self.include = []
if include is not None:
self.include = shlex.split(include)
self.exclude = self.DEFAULT_EXCLUDES[:]
if exclude is not None:
self.exclude += shlex.split(exclude)
for dirpath, dirnames, filenames in os.walk(self.basedir):
dirpath = dirpath[len(self.basedir) + 1:]
for filename in filenames:
filepath = nfilepath = os.path.join(dirpath, filename)
if os.sep != '/':
nfilepath = nfilepath.replace(os.sep, '/')
if self.include:
included = False
for pattern in self.include:
if fnmatch.fnmatchcase(nfilepath, pattern) or \
fnmatch.fnmatchcase(filename, pattern):
included = True
break
if not included:
continue
excluded = False
for pattern in self.exclude:
if fnmatch.fnmatchcase(nfilepath, pattern) or \
fnmatch.fnmatchcase(filename, pattern):
excluded = True
break
if not excluded:
self.files.append(filepath)
def __iter__(self):
"""Iterate over the names of all files in the set."""
for filename in self.files:
yield filename
def __contains__(self, filename):
"""Return whether the given file name is in the set.
:param filename: the name of the file to check
"""
return filename in self.files
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