/usr/share/pyshared/kid/compiler.py is in python-kid 0.9.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""Kid Compiler
Compile XML to Python byte-code.
"""
__revision__ = "$Rev: 492 $"
__date__ = "$Date: 2007-07-06 21:38:45 -0400 (Fri, 06 Jul 2007) $"
__author__ = "Ryan Tomayko (rtomayko@gmail.com)"
__copyright__ = "Copyright 2004-2005, Ryan Tomayko"
__license__ = "MIT <http://www.opensource.org/licenses/mit-license.php>"
import os
import os.path
import imp
import stat
import struct
import marshal
import kid
from kid.codewriter import raise_template_error
__all__ = ['KID_EXT', 'compile', 'compile_file', 'compile_dir']
# kid filename extension
KID_EXT = ".kid"
def actualize(code, dict=None):
"""Run code with variables in dict, updating the dict."""
if dict is None:
dict = {}
exec code in dict
return dict
_py_compile = compile
def py_compile(code, filename='<string>', kind='exec'):
"""The Python built-in compile function with safeguard."""
if type(code) == unicode:
# unicode strings may not have a PEP 0263 encoding declaration
if code.startswith('# -*- coding: '):
# we want the line numbering to match with the source file,
# so we only remove the magic word in the comment line:
code = '# -*-' + code[13:]
return _py_compile(code, filename, 'exec')
def compile(source, filename='<string>', encoding=None, entity_map=None):
"""Compiles Kid XML source to a Python code object.
source -- A file like object - must support read.
filename -- An optional filename that is used
"""
# XXX all kinds of work to do here catching syntax errors and
# adjusting line numbers...
py = kid.codewriter.parse(source, encoding, filename, entity_map)
return py_compile(py, filename)
_timestamp = lambda filename : os.stat(filename)[stat.ST_MTIME]
class KidFile(object):
magic = imp.get_magic()
def __init__(self, kid_file, force=False,
encoding=None, strip_dest_dir=None, entity_map=None):
self.kid_file = kid_file
self.py_file = os.path.splitext(kid_file)[0] + '.py'
self.strip_dest_dir = strip_dest_dir
self.pyc_file = self.py_file + 'c'
self.encoding = encoding
self.entity_map = entity_map
fp = None
if force:
stale = True
else:
stale = False
try:
fp = open(self.pyc_file, "rb")
except IOError:
stale = True
else:
if fp.read(4) != self.magic:
stale = True
else:
mtime = struct.unpack('<I', fp.read(4))[0]
kid_mtime = _timestamp(kid_file)
if kid_mtime is None or mtime < kid_mtime:
stale = True
self.stale = stale
self._pyc_fp = fp
self._python = None
self._code = None
def compile(self, dump_code=True, dump_source=False):
if dump_source:
self.dump_source()
code = self.code
if dump_code and self.stale:
self.dump_code()
return code
def code(self):
"""Get the compiled Python code for the template."""
if self._code is None:
if self.stale:
pyfile = self.py_file
if self.strip_dest_dir and \
self.py_file.startswith(self.strip_dest_dir):
pyfile = os.path.normpath(
self.py_file[len(self.strip_dest_dir):])
try:
self._code = py_compile(self.python, pyfile)
except Exception:
raise_template_error(filename=self.kid_file,
encoding=self.encoding)
else:
self._code = marshal.load(self._pyc_fp)
return self._code
code = property(code)
def python(self):
"""Get the Python source for the template."""
if self._python is None:
py = kid.codewriter.parse_file(self.kid_file,
self.encoding, self.entity_map)
self._python = py
return self._python
python = property(python)
def dump_source(self, file=None):
py = self.python
encoding = self.encoding or 'utf-8'
file = file or self.py_file
fp = _maybe_open(file, 'wb')
if fp:
try:
try:
fp.write(py.encode(encoding))
finally:
fp.close()
except IOError:
_maybe_remove(file)
else:
return True
return False
def dump_code(self, file=None):
code = self.code
file = file or self.pyc_file
fp = _maybe_open(file, 'wb')
if fp:
try:
try:
if self.kid_file:
mtime = os.stat(self.kid_file)[stat.ST_MTIME]
else:
mtime = 0
fp.write('\0\0\0\0')
fp.write(struct.pack('<I', mtime))
marshal.dump(code, fp)
fp.flush()
fp.seek(0)
fp.write(self.magic)
finally:
fp.close()
except IOError:
_maybe_remove(file)
else:
return True
return False
def _maybe_open(f, mode):
if isinstance(f, basestring):
try:
f = open(f, mode)
except IOError:
f = None
return f
def _maybe_remove(f):
if isinstance(f, basestring):
try:
os.remove(f)
except OSError:
pass
#
# functions for compiling files directly and the kidc utility
#
def compile_file(file, force=False, source=False, encoding=None,
strip_dest_dir=None, entity_map=None):
"""Compile the file specified.
Return True if the file was compiled, False if the compiled file already
exists and is up-to-date.
"""
template = KidFile(file, force, encoding, strip_dest_dir, entity_map)
if template.stale:
template.compile(dump_source=source)
return True
else:
return False
def compile_dir(dir, maxlevels=10, force=False, source=False,
encoding=None, strip_dest_dir=None, entity_map=None):
"""Byte-compile all kid modules in the given directory tree.
Keyword Arguments: (only dir is required)
dir -- the directory to byte-compile
maxlevels -- maximum recursion level (default 10)
force -- if True, force compilation, even if timestamps are up-to-date.
source -- if True, dump python source (.py) files along with .pyc files.
Yields tuples (stat, filename) where stat is either an error message,
True if the file was compiled or False if the file did not need to be compiled.
"""
names = os.listdir(dir)
names.sort()
ext_len = len(KID_EXT)
for name in names:
fullname = os.path.join(dir, name)
if os.path.isfile(fullname):
ext = name[-ext_len:]
if ext == KID_EXT:
try:
stat = compile_file(fullname, force, source,
encoding, strip_dest_dir, entity_map)
except Exception, e:
# TODO: grab the traceback and yield it with the other stuff
stat = e
yield stat, fullname
elif maxlevels > 0 and name != os.curdir and name != os.pardir \
and os.path.isdir(fullname) and not os.path.islink(fullname):
for res in compile_dir(fullname, maxlevels - 1, force, source,
encoding, strip_dest_dir, entity_map):
yield res
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