springsuite: planemo/lib/python3.7/site-packages/jinja2/debug.py comparison

comparison planemo/lib/python3.7/site-packages/jinja2/debug.py @ 1:56ad4e20f292 draft

"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"

author	guerler
date	Fri, 31 Jul 2020 00:32:28 -0400
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children

comparison

equal deleted inserted replaced

-:d30785e31577
+:56ad4e20f292
+import sys
+from types import CodeType
+from . import TemplateSyntaxError
+from ._compat import PYPY
+from .utils import internal_code
+from .utils import missing
+def rewrite_traceback_stack(source=None):
+"""Rewrite the current exception to replace any tracebacks from
+within compiled template code with tracebacks that look like they
+came from the template source.
+This must be called within an ``except`` block.
+:param exc_info: A :meth:`sys.exc_info` tuple. If not provided,
+the current ``exc_info`` is used.
+:param source: For ``TemplateSyntaxError``, the original source if
+known.
+:return: A :meth:`sys.exc_info` tuple that can be re-raised.
+"""
+exc_type, exc_value, tb = sys.exc_info()
+if isinstance(exc_value, TemplateSyntaxError) and not exc_value.translated:
+exc_value.translated = True
+exc_value.source = source
+try:
+# Remove the old traceback on Python 3, otherwise the frames
+# from the compiler still show up.
+exc_value.with_traceback(None)
+except AttributeError:
+pass
+# Outside of runtime, so the frame isn't executing template
+# code, but it still needs to point at the template.
+tb = fake_traceback(
+exc_value, None, exc_value.filename or "<unknown>", exc_value.lineno
+)
+else:
+# Skip the frame for the render function.
+tb = tb.tb_next
+stack = []
+# Build the stack of traceback object, replacing any in template
+# code with the source file and line information.
+while tb is not None:
+# Skip frames decorated with @internalcode. These are internal
+# calls that aren't useful in template debugging output.
+if tb.tb_frame.f_code in internal_code:
+tb = tb.tb_next
+continue
+template = tb.tb_frame.f_globals.get("__jinja_template__")
+if template is not None:
+lineno = template.get_corresponding_lineno(tb.tb_lineno)
+fake_tb = fake_traceback(exc_value, tb, template.filename, lineno)
+stack.append(fake_tb)
+else:
+stack.append(tb)
+tb = tb.tb_next
+tb_next = None
+# Assign tb_next in reverse to avoid circular references.
+for tb in reversed(stack):
+tb_next = tb_set_next(tb, tb_next)
+return exc_type, exc_value, tb_next
+def fake_traceback(exc_value, tb, filename, lineno):
+"""Produce a new traceback object that looks like it came from the
+template source instead of the compiled code. The filename, line
+number, and location name will point to the template, and the local
+variables will be the current template context.
+:param exc_value: The original exception to be re-raised to create
+the new traceback.
+:param tb: The original traceback to get the local variables and
+code info from.
+:param filename: The template filename.
+:param lineno: The line number in the template source.
+"""
+if tb is not None:
+# Replace the real locals with the context that would be
+# available at that point in the template.
+locals = get_template_locals(tb.tb_frame.f_locals)
+locals.pop("__jinja_exception__", None)
+else:
+locals = {}
+globals = {
+"__name__": filename,
+"__file__": filename,
+"__jinja_exception__": exc_value,
+}
+# Raise an exception at the correct line number.
+code = compile("\n" * (lineno - 1) + "raise __jinja_exception__", filename, "exec")
+# Build a new code object that points to the template file and
+# replaces the location with a block name.
+try:
+location = "template"
+if tb is not None:
+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:]
+# Collect arguments for the new code object. CodeType only
+# accepts positional arguments, and arguments were inserted in
+# new Python versions.
+code_args = []
+for attr in (
+"argcount",
+"posonlyargcount",  # Python 3.8
+"kwonlyargcount",  # Python 3
+"nlocals",
+"stacksize",
+"flags",
+"code",  # codestring
+"consts",  # constants
+"names",
+"varnames",
+("filename", filename),
+("name", location),
+"firstlineno",
+"lnotab",
+"freevars",
+"cellvars",
+):
+if isinstance(attr, tuple):
+# Replace with given value.
+code_args.append(attr[1])
+continue
+try:
+# Copy original value if it exists.
+code_args.append(getattr(code, "co_" + attr))
+except AttributeError:
+# Some arguments were added later.
+continue
+code = CodeType(*code_args)
+except Exception:
+# Some environments such as Google App Engine don't support
+# modifying code objects.
+pass
+# Execute the new code, which is guaranteed to raise, and return
+# the new traceback without this frame.
+try:
+exec(code, globals, locals)
+except BaseException:
+return sys.exc_info()[2].tb_next
+def get_template_locals(real_locals):
+"""Based on the runtime locals, get the context that would be
+available at that point in the template.
+"""
+# Start with the current template context.
+ctx = real_locals.get("context")
+if ctx:
+data = ctx.get_all().copy()
+else:
+data = {}
+# Might be in a derived context that only sets local variables
+# rather than pushing a context. Local variables follow the scheme
+# l_depth_name. Find the highest-depth local that has a value for
+# each name.
+local_overrides = {}
+for name, value in real_locals.items():
+if not name.startswith("l_") or value is missing:
+# Not a template variable, or no longer relevant.
+continue
+try:
+_, depth, name = name.split("_", 2)
+depth = int(depth)
+except ValueError:
+continue
+cur_depth = local_overrides.get(name, (-1,))[0]
+if cur_depth < depth:
+local_overrides[name] = (depth, value)
+# Modify the context with any derived context.
+for name, (_, value) in local_overrides.items():
+if value is missing:
+data.pop(name, None)
+else:
+data[name] = value
+return data
+if sys.version_info >= (3, 7):
+# tb_next is directly assignable as of Python 3.7
+def tb_set_next(tb, tb_next):
+tb.tb_next = tb_next
+return tb
+elif PYPY:
+# PyPy might have special support, and won't work with ctypes.
+try:
+import tputil
+except ImportError:
+# Without tproxy support, use the original traceback.
+def tb_set_next(tb, tb_next):
+return tb
+else:
+# With tproxy support, create a proxy around the traceback that
+# returns the new tb_next.
+def tb_set_next(tb, tb_next):
+def controller(op):
+if op.opname == "__getattribute__" and op.args[0] == "tb_next":
+return tb_next
+return op.delegate()
+return tputil.make_proxy(controller, obj=tb)
+else:
+# Use ctypes to assign tb_next at the C level since it's read-only
+# from Python.
+import ctypes
+class _CTraceback(ctypes.Structure):
+_fields_ = [
+# Extra PyObject slots when compiled with Py_TRACE_REFS.
+("PyObject_HEAD", ctypes.c_byte * object().__sizeof__()),
+# Only care about tb_next as an object, not a traceback.
+("tb_next", ctypes.py_object),
+]
+def tb_set_next(tb, tb_next):
+c_tb = _CTraceback.from_address(id(tb))
+# Clear out the old tb_next.
+if tb.tb_next is not None:
+c_tb_next = ctypes.py_object(tb.tb_next)
+c_tb.tb_next = ctypes.py_object()
+ctypes.pythonapi.Py_DecRef(c_tb_next)
+# Assign the new tb_next.
+if tb_next is not None:
+c_tb_next = ctypes.py_object(tb_next)
+ctypes.pythonapi.Py_IncRef(c_tb_next)
+c_tb.tb_next = c_tb_next
+return tb

Mercurial > repos > guerler > springsuite

comparison planemo/lib/python3.7/site-packages/jinja2/debug.py @ 1:56ad4e20f292 draft