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from __future__ import absolute_import
import os
import sys
import errno
try:
from lxml import etree
have_lxml = True
except ImportError:
have_lxml = False
try:
from xml.etree import cElementTree as etree
except ImportError:
try:
from xml.etree import ElementTree as etree
except ImportError:
etree = None
from ..Compiler import Errors
class CythonDebugWriter(object):
"""
Class to output debugging information for cygdb
It writes debug information to cython_debug/cython_debug_info_<modulename>
in the build directory.
"""
def __init__(self, output_dir):
if etree is None:
raise Errors.NoElementTreeInstalledException()
self.output_dir = os.path.join(output_dir or os.curdir, 'cython_debug')
self.tb = etree.TreeBuilder()
# set by Cython.Compiler.ParseTreeTransforms.DebugTransform
self.module_name = None
self.start('cython_debug', attrs=dict(version='1.0'))
def start(self, name, attrs=None):
self.tb.start(name, attrs or {})
def end(self, name):
self.tb.end(name)
def add_entry(self, name, **attrs):
self.tb.start(name, attrs)
self.tb.end(name)
def serialize(self):
self.tb.end('Module')
self.tb.end('cython_debug')
xml_root_element = self.tb.close()
try:
os.makedirs(self.output_dir)
except OSError as e:
if e.errno != errno.EEXIST:
raise
et = etree.ElementTree(xml_root_element)
kw = {}
if have_lxml:
kw['pretty_print'] = True
fn = "cython_debug_info_" + self.module_name
et.write(os.path.join(self.output_dir, fn), encoding="UTF-8", **kw)
interpreter_path = os.path.join(self.output_dir, 'interpreter')
with open(interpreter_path, 'w') as f:
f.write(sys.executable)
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