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Unified Diff: mojo/public/third_party/jinja2/debug.py

Issue 814543006: Move //mojo/{public, edk} underneath //third_party (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase Created 5 years, 11 months ago
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Index: mojo/public/third_party/jinja2/debug.py
diff --git a/mojo/public/third_party/jinja2/debug.py b/mojo/public/third_party/jinja2/debug.py
deleted file mode 100644
index 815cc18a4f8fd76e747835f24c1297a7d2264628..0000000000000000000000000000000000000000
--- a/mojo/public/third_party/jinja2/debug.py
+++ /dev/null
@@ -1,337 +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 missing, internal_code
-from jinja2.exceptions import TemplateSyntaxError
-from jinja2._compat import iteritems, reraise, code_type
-
-# 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 printing 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 range(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:
- reraise(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 iteritems(real_locals):
- 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 = code_type(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, 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:
- tb_set_next = _init_ugly_crap()
- except:
- pass
- del _init_ugly_crap
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