diff options
Diffstat (limited to 'lib/python2.7/site-packages/Jinja2-2.6-py2.7.egg/jinja2/debug.py')
| -rwxr-xr-x | lib/python2.7/site-packages/Jinja2-2.6-py2.7.egg/jinja2/debug.py | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/lib/python2.7/site-packages/Jinja2-2.6-py2.7.egg/jinja2/debug.py b/lib/python2.7/site-packages/Jinja2-2.6-py2.7.egg/jinja2/debug.py deleted file mode 100755 index 2af22223..00000000 --- a/lib/python2.7/site-packages/Jinja2-2.6-py2.7.egg/jinja2/debug.py +++ /dev/null @@ -1,339 +0,0 @@ -# -*- coding: utf-8 -*- -""" - jinja2.debug - ~~~~~~~~~~~~ - - Implements the debug interface for Jinja. This module does some pretty - ugly stuff with the Python traceback system in order to achieve tracebacks - with correct line numbers, locals and contents. - - :copyright: (c) 2010 by the Jinja Team. - :license: BSD, see LICENSE for more details. -""" -import sys -import traceback -from types import TracebackType -from jinja2.utils import CodeType, missing, internal_code -from jinja2.exceptions import TemplateSyntaxError - -# on pypy we can take advantage of transparent proxies -try: - from __pypy__ import tproxy -except ImportError: - tproxy = None - - -# how does the raise helper look like? -try: - exec "raise TypeError, 'foo'" -except SyntaxError: - raise_helper = 'raise __jinja_exception__[1]' -except TypeError: - raise_helper = 'raise __jinja_exception__[0], __jinja_exception__[1]' - - -class TracebackFrameProxy(object): - """Proxies a traceback frame.""" - - def __init__(self, tb): - self.tb = tb - self._tb_next = None - - @property - def tb_next(self): - return self._tb_next - - def set_next(self, next): - if tb_set_next is not None: - try: - tb_set_next(self.tb, next and next.tb or None) - except Exception: - # this function can fail due to all the hackery it does - # on various python implementations. We just catch errors - # down and ignore them if necessary. - pass - self._tb_next = next - - @property - def is_jinja_frame(self): - return '__jinja_template__' in self.tb.tb_frame.f_globals - - def __getattr__(self, name): - return getattr(self.tb, name) - - -def make_frame_proxy(frame): - proxy = TracebackFrameProxy(frame) - if tproxy is None: - return proxy - def operation_handler(operation, *args, **kwargs): - if operation in ('__getattribute__', '__getattr__'): - return getattr(proxy, args[0]) - elif operation == '__setattr__': - proxy.__setattr__(*args, **kwargs) - else: - return getattr(proxy, operation)(*args, **kwargs) - return tproxy(TracebackType, operation_handler) - - -class ProcessedTraceback(object): - """Holds a Jinja preprocessed traceback for priting or reraising.""" - - def __init__(self, exc_type, exc_value, frames): - assert frames, 'no frames for this traceback?' - self.exc_type = exc_type - self.exc_value = exc_value - self.frames = frames - - # newly concatenate the frames (which are proxies) - prev_tb = None - for tb in self.frames: - if prev_tb is not None: - prev_tb.set_next(tb) - prev_tb = tb - prev_tb.set_next(None) - - def render_as_text(self, limit=None): - """Return a string with the traceback.""" - lines = traceback.format_exception(self.exc_type, self.exc_value, - self.frames[0], limit=limit) - return ''.join(lines).rstrip() - - def render_as_html(self, full=False): - """Return a unicode string with the traceback as rendered HTML.""" - from jinja2.debugrenderer import render_traceback - return u'%s\n\n<!--\n%s\n-->' % ( - render_traceback(self, full=full), - self.render_as_text().decode('utf-8', 'replace') - ) - - @property - def is_template_syntax_error(self): - """`True` if this is a template syntax error.""" - return isinstance(self.exc_value, TemplateSyntaxError) - - @property - def exc_info(self): - """Exception info tuple with a proxy around the frame objects.""" - return self.exc_type, self.exc_value, self.frames[0] - - @property - def standard_exc_info(self): - """Standard python exc_info for re-raising""" - tb = self.frames[0] - # the frame will be an actual traceback (or transparent proxy) if - # we are on pypy or a python implementation with support for tproxy - if type(tb) is not TracebackType: - tb = tb.tb - return self.exc_type, self.exc_value, tb - - -def make_traceback(exc_info, source_hint=None): - """Creates a processed traceback object from the exc_info.""" - exc_type, exc_value, tb = exc_info - if isinstance(exc_value, TemplateSyntaxError): - exc_info = translate_syntax_error(exc_value, source_hint) - initial_skip = 0 - else: - initial_skip = 1 - return translate_exception(exc_info, initial_skip) - - -def translate_syntax_error(error, source=None): - """Rewrites a syntax error to please traceback systems.""" - error.source = source - error.translated = True - exc_info = (error.__class__, error, None) - filename = error.filename - if filename is None: - filename = '<unknown>' - return fake_exc_info(exc_info, filename, error.lineno) - - -def translate_exception(exc_info, initial_skip=0): - """If passed an exc_info it will automatically rewrite the exceptions - all the way down to the correct line numbers and frames. - """ - tb = exc_info[2] - frames = [] - - # skip some internal frames if wanted - for x in xrange(initial_skip): - if tb is not None: - tb = tb.tb_next - initial_tb = tb - - while tb is not None: - # skip frames decorated with @internalcode. These are internal - # calls we can't avoid and that are useless in template debugging - # output. - if tb.tb_frame.f_code in internal_code: - tb = tb.tb_next - continue - - # save a reference to the next frame if we override the current - # one with a faked one. - next = tb.tb_next - - # fake template exceptions - template = tb.tb_frame.f_globals.get('__jinja_template__') - if template is not None: - lineno = template.get_corresponding_lineno(tb.tb_lineno) - tb = fake_exc_info(exc_info[:2] + (tb,), template.filename, - lineno)[2] - - frames.append(make_frame_proxy(tb)) - tb = next - - # if we don't have any exceptions in the frames left, we have to - # reraise it unchanged. - # XXX: can we backup here? when could this happen? - if not frames: - raise exc_info[0], exc_info[1], exc_info[2] - - return ProcessedTraceback(exc_info[0], exc_info[1], frames) - - -def fake_exc_info(exc_info, filename, lineno): - """Helper for `translate_exception`.""" - exc_type, exc_value, tb = exc_info - - # figure the real context out - if tb is not None: - real_locals = tb.tb_frame.f_locals.copy() - ctx = real_locals.get('context') - if ctx: - locals = ctx.get_all() - else: - locals = {} - for name, value in real_locals.iteritems(): - if name.startswith('l_') and value is not missing: - locals[name[2:]] = value - - # if there is a local called __jinja_exception__, we get - # rid of it to not break the debug functionality. - locals.pop('__jinja_exception__', None) - else: - locals = {} - - # assamble fake globals we need - globals = { - '__name__': filename, - '__file__': filename, - '__jinja_exception__': exc_info[:2], - - # we don't want to keep the reference to the template around - # to not cause circular dependencies, but we mark it as Jinja - # frame for the ProcessedTraceback - '__jinja_template__': None - } - - # and fake the exception - code = compile('\n' * (lineno - 1) + raise_helper, filename, 'exec') - - # if it's possible, change the name of the code. This won't work - # on some python environments such as google appengine - try: - if tb is None: - location = 'template' - else: - function = tb.tb_frame.f_code.co_name - if function == 'root': - location = 'top-level template code' - elif function.startswith('block_'): - location = 'block "%s"' % function[6:] - else: - location = 'template' - code = CodeType(0, code.co_nlocals, code.co_stacksize, - code.co_flags, code.co_code, code.co_consts, - code.co_names, code.co_varnames, filename, - location, code.co_firstlineno, - code.co_lnotab, (), ()) - except: - pass - - # execute the code and catch the new traceback - try: - exec code in globals, locals - except: - exc_info = sys.exc_info() - new_tb = exc_info[2].tb_next - - # return without this frame - return exc_info[:2] + (new_tb,) - - -def _init_ugly_crap(): - """This function implements a few ugly things so that we can patch the - traceback objects. The function returned allows resetting `tb_next` on - any python traceback object. Do not attempt to use this on non cpython - interpreters - """ - import ctypes - from types import TracebackType - - # figure out side of _Py_ssize_t - if hasattr(ctypes.pythonapi, 'Py_InitModule4_64'): - _Py_ssize_t = ctypes.c_int64 - else: - _Py_ssize_t = ctypes.c_int - - # regular python - class _PyObject(ctypes.Structure): - pass - _PyObject._fields_ = [ - ('ob_refcnt', _Py_ssize_t), - ('ob_type', ctypes.POINTER(_PyObject)) - ] - - # python with trace - if hasattr(sys, 'getobjects'): - class _PyObject(ctypes.Structure): - pass - _PyObject._fields_ = [ - ('_ob_next', ctypes.POINTER(_PyObject)), - ('_ob_prev', ctypes.POINTER(_PyObject)), - ('ob_refcnt', _Py_ssize_t), - ('ob_type', ctypes.POINTER(_PyObject)) - ] - - class _Traceback(_PyObject): - pass - _Traceback._fields_ = [ - ('tb_next', ctypes.POINTER(_Traceback)), - ('tb_frame', ctypes.POINTER(_PyObject)), - ('tb_lasti', ctypes.c_int), - ('tb_lineno', ctypes.c_int) - ] - - def tb_set_next(tb, next): - """Set the tb_next attribute of a traceback object.""" - if not (isinstance(tb, TracebackType) and - (next is None or isinstance(next, TracebackType))): - raise TypeError('tb_set_next arguments must be traceback objects') - obj = _Traceback.from_address(id(tb)) - if tb.tb_next is not None: - old = _Traceback.from_address(id(tb.tb_next)) - old.ob_refcnt -= 1 - if next is None: - obj.tb_next = ctypes.POINTER(_Traceback)() - else: - next = _Traceback.from_address(id(next)) - next.ob_refcnt += 1 - obj.tb_next = ctypes.pointer(next) - - return tb_set_next - - -# try to get a tb_set_next implementation if we don't have transparent -# proxies. -tb_set_next = None -if tproxy is None: - try: - from jinja2._debugsupport import tb_set_next - except ImportError: - try: - tb_set_next = _init_ugly_crap() - except: - pass - del _init_ugly_crap |