def __init__(self, new_stdout=None):

"""If stdout is None, redirect to /dev/null"""

self._new_stdout = new_stdout or open(os.devnull, 'w')

def __enter__(self):

sys.stdout.flush()

self.oldstdout_fno = os.dup(sys.stdout.fileno())

os.dup2(self._new_stdout.fileno(), 1)

def __exit__(self, exc_type, exc_value, traceback):

self._new_stdout.flush()

os.dup2(self.oldstdout_fno, 1)

basic_types = {

'module': 'import',

'instance': 'variable',

'statement': 'value',

'param': 'variable',

}

def __init__(self):

self.default_sys_path = sys.path

self.environment = jedi.api.environment.Environment(sys.prefix, sys.executable)

self._input = io.open(sys.stdin.fileno(), encoding='utf-8')

if (os.path.sep == '/') and (platform.uname()[2].find('Microsoft') > -1):

# WSL; does not support UNC paths

self.drive_mount = '/mnt/'

elif sys.platform == 'cygwin':

# cygwin

self.drive_mount = '/cygdrive/'

else:

# Do no normalization, e.g. Windows build of Python.

# Could add additional test: ((os.path.sep == '/') and os.path.isdir('/mnt/c'))

# However, this may have more false positives trying to identify Windows/*nix hybrids

self.drive_mount = ''

def _get_definition_type(self, definition):

# if definition.type not in ['import', 'keyword'] and is_built_in():

# return 'builtin'

try:

if definition.type in ['statement'] and definition.name.isupper():

return 'constant'

return self.basic_types.get(definition.type, definition.type)

except Exception:

return 'builtin'

def _additional_info(self, completion):

"""Provide additional information about the completion object."""

if not hasattr(completion, '_definition') or completion._definition is None:

return ''

if completion.type == 'statement':

nodes_to_display = ['InstanceElement', 'String', 'Node', 'Lambda',

'Number']

return ''.join(c.get_code() for c in

completion._definition.children if type(c).__name__

in nodes_to_display).replace('\n', '')

return ''

@classmethod

def _get_top_level_module(cls, path):

"""Recursively walk through directories looking for top level module.

_path, _ = os.path.split(path)

if os.path.isfile(os.path.join(_path, '__init__.py')):

return cls._get_top_level_module(_path)

return path

def _generate_signature(self, completion):

"""Generate signature with function arguments.

if completion.type in ['module'] or not hasattr(completion, 'params'):

return ''

return '%s(%s)' % (

completion.name,

', '.join(p.description[6:] for p in completion.params if p))

def _get_call_signatures(self, script):

"""Extract call signatures from jedi.api.Script object in failsafe way.

_signatures = []

try:

call_signatures = script.call_signatures()

except KeyError:

call_signatures = []

except :

call_signatures = []

for signature in call_signatures:

for pos, param in enumerate(signature.params):

if not param.name:

continue

name = self._get_param_name(param)

if param.name == 'self' and pos == 0:

continue

if name.startswith('*'):

continue

value = self._get_param_value(param)

_signatures.append((signature, name, value))

return _signatures

def _get_param_name(self, p):

if(p.name.startswith('param ')):

return p.name[6:] # drop leading 'param '

return p.name

def _get_param_value(self, p):

pair = p.description.split('=')

if(len(pair) > 1):

return pair[1]

return None

def _get_call_signatures_with_args(self, script):

"""Extract call signatures from jedi.api.Script object in failsafe way.

_signatures = []

try:

call_signatures = script.call_signatures()

except KeyError:

call_signatures = []

for signature in call_signatures:

sig = {"name": "", "description": "", "docstring": "",

"paramindex": 0, "params": [], "bracketstart": []}

sig["description"] = signature.description

try:

sig["docstring"] = signature.docstring()

sig["raw_docstring"] = signature.docstring(raw=True)

except Exception:

sig["docstring"] = ''

sig["raw_docstring"] = ''

sig["name"] = signature.name

sig["paramindex"] = signature.index

sig["bracketstart"].append(signature.index)

_signatures.append(sig)

for pos, param in enumerate(signature.params):

if not param.name:

continue

name = self._get_param_name(param)

if param.name == 'self' and pos == 0:

continue

value = self._get_param_value(param)

paramDocstring = ''

try:

paramDocstring = param.docstring()

except Exception:

paramDocstring = ''

sig["params"].append({"name": name, "value": value, "docstring": paramDocstring, "description": param.description})

return _signatures

def _serialize_completions(self, script, identifier=None, prefix=''):

"""Serialize response to be read from VSCode.

_completions = []

for signature, name, value in self._get_call_signatures(script):

if not self.fuzzy_matcher and not name.lower().startswith(

prefix.lower()):

continue

_completion = {

'type': 'property',

'raw_type': '',

'rightLabel': self._additional_info(signature)

}

_completion['description'] = ''

_completion['raw_docstring'] = ''

# we pass 'text' here only for fuzzy matcher

if value:

_completion['snippet'] = '%s=${1:%s}$0' % (name, value)

_completion['text'] = '%s=' % (name)

else:

_completion['snippet'] = '%s=$1$0' % name

_completion['text'] = name

_completion['displayText'] = name

_completions.append(_completion)

try:

completions = script.completions()

except KeyError:

completions = []

except :

completions = []

for completion in completions:

try:

_completion = {

'text': completion.name,

'type': self._get_definition_type(completion),

'raw_type': completion.type,

'rightLabel': self._additional_info(completion)

}

except Exception:

continue

for c in _completions:

if c['text'] == _completion['text']:

c['type'] = _completion['type']

c['raw_type'] = _completion['raw_type']

if any([c['text'].split('=')[0] == _completion['text']

for c in _completions]):

# ignore function arguments we already have

continue

_completions.append(_completion)

return json.dumps({'id': identifier, 'results': _completions})

def _serialize_methods(self, script, identifier=None, prefix=''):

_methods = []

try:

completions = script.completions()

except KeyError:

return []

for completion in completions:

if completion.name == '__autocomplete_python':

instance = completion.parent().name

break

else:

instance = 'self.__class__'

for completion in completions:

params = []

if hasattr(completion, 'params'):

params = [p.description for p in completion.params if p]

if completion.parent().type == 'class':

_methods.append({

'parent': completion.parent().name,

'instance': instance,

'name': completion.name,

'params': params,

'moduleName': completion.module_name,

'fileName': completion.module_path,

'line': completion.line,

'column': completion.column,

})

return json.dumps({'id': identifier, 'results': _methods})

def _serialize_arguments(self, script, identifier=None):

"""Serialize response to be read from VSCode.

return json.dumps({"id": identifier, "results": self._get_call_signatures_with_args(script)})

def _top_definition(self, definition):

for d in definition.goto_assignments():

if d == definition:

continue

if d.type == 'import':

return self._top_definition(d)

else:

return d

return definition

def _extract_range_jedi_0_11_1(self, definition):

from parso.utils import split_lines

# get the scope range

try:

if definition.type in ['class', 'function']:

tree_name = definition._name.tree_name

scope = tree_name.get_definition()

start_line = scope.start_pos[0] - 1

start_column = scope.start_pos[1]

# get the lines

code = scope.get_code(include_prefix=False)

lines = split_lines(code)

# trim the lines

lines = '\n'.join(lines).rstrip().split('\n')

end_line = start_line + len(lines) - 1

end_column = len(lines[-1]) - 1

else:

symbol = definition._name.tree_name

start_line = symbol.start_pos[0] - 1

start_column = symbol.start_pos[1]

end_line = symbol.end_pos[0] - 1

end_column = symbol.end_pos[1]

return {

'start_line': start_line,

'start_column': start_column,

'end_line': end_line,

'end_column': end_column

}

except Exception as e:

return {

'start_line': definition.line - 1,

'start_column': definition.column,

'end_line': definition.line - 1,

'end_column': definition.column

}

def _extract_range(self, definition):

"""Provides the definition range of a given definition

return self._extract_range_jedi_0_11_1(definition)

def _get_definitionsx(self, definitions, identifier=None, ignoreNoModulePath=False):

"""Serialize response to be read from VSCode.

_definitions = []

for definition in definitions:

try:

if definition.type == 'import':

definition = self._top_definition(definition)

definitionRange = {

'start_line': 0,

'start_column': 0,

'end_line': 0,

'end_column': 0

}

module_path = ''

if hasattr(definition, 'module_path') and definition.module_path:

module_path = definition.module_path

definitionRange = self._extract_range(definition)

else:

if not ignoreNoModulePath:

continue

try:

parent = definition.parent()

container = parent.name if parent.type != 'module' else ''

except Exception:

container = ''

try:

docstring = definition.docstring()

rawdocstring = definition.docstring(raw=True)

except Exception:

docstring = ''

rawdocstring = ''

_definition = {

'text': definition.name,

'type': self._get_definition_type(definition),

'raw_type': definition.type,

'fileName': module_path,

'container': container,

'range': definitionRange,

'description': definition.description,

'docstring': docstring,

'raw_docstring': rawdocstring,

'signature': self._generate_signature(definition)

}

_definitions.append(_definition)

except Exception as e:

pass

return _definitions

def _serialize_definitions(self, definitions, identifier=None):

"""Serialize response to be read from VSCode.

_definitions = []

for definition in definitions:

try:

if definition.module_path:

if definition.type == 'import':

definition = self._top_definition(definition)

if not definition.module_path:

continue

try:

parent = definition.parent()

container = parent.name if parent.type != 'module' else ''

except Exception:

container = ''

try:

docstring = definition.docstring()

rawdocstring = definition.docstring(raw=True)

except Exception:

docstring = ''

rawdocstring = ''

_definition = {

'text': definition.name,

'type': self._get_definition_type(definition),

'raw_type': definition.type,

'fileName': definition.module_path,

'container': container,

'range': self._extract_range(definition),

'description': definition.description,

'docstring': docstring,

'raw_docstring': rawdocstring

}

_definitions.append(_definition)

except Exception as e:

pass

return json.dumps({'id': identifier, 'results': _definitions})

def _serialize_tooltip(self, definitions, identifier=None):

_definitions = []

for definition in definitions:

signature = definition.name

description = None

if definition.type in ['class', 'function']:

signature = self._generate_signature(definition)

try:

description = definition.docstring(raw=True).strip()

except Exception:

description = ''

if not description and not hasattr(definition, 'get_line_code'):

# jedi returns an empty string for compiled objects

description = definition.docstring().strip()

if definition.type == 'module':

signature = definition.full_name

try:

description = definition.docstring(raw=True).strip()

except Exception:

description = ''

if not description and hasattr(definition, 'get_line_code'):

# jedi returns an empty string for compiled objects

description = definition.docstring().strip()

_definition = {

'type': self._get_definition_type(definition),

'text': definition.name,

'description': description,

'docstring': description,

'signature': signature

}

_definitions.append(_definition)

return json.dumps({'id': identifier, 'results': _definitions})

def _serialize_usages(self, usages, identifier=None):

_usages = []

for usage in usages:

_usages.append({

'name': usage.name,

'moduleName': usage.module_name,

'fileName': usage.module_path,

'line': usage.line,

'column': usage.column,

})

return json.dumps({'id': identifier, 'results': _usages})

def _deserialize(self, request):

"""Deserialize request from VSCode.

return json.loads(request)

def _set_request_config(self, config):

"""Sets config values for current request.

sys.path = self.default_sys_path

self.use_snippets = config.get('useSnippets')

self.show_doc_strings = config.get('showDescriptions', True)

self.fuzzy_matcher = config.get('fuzzyMatcher', False)

jedi.settings.case_insensitive_completion = config.get(

'caseInsensitiveCompletion', True)

for path in config.get('extraPaths', []):

if path and path not in sys.path:

sys.path.insert(0, path)

def _normalize_request_path(self, request):

"""Normalize any Windows paths received by a *nix build of

if 'path' in request:

if not self.drive_mount:

return

newPath = request['path'].replace('\\', '/')

if newPath[0:1] == '/':

# is absolute path with no drive letter

request['path'] = newPath

elif newPath[1:2] == ':':

# is path with drive letter, only absolute can be mapped

request['path'] = self.drive_mount + newPath[0:1].lower() + newPath[2:]

else:

# is relative path

request['path'] = newPath

def _process_request(self, request):

"""Accept serialized request from VSCode and write response.

request = self._deserialize(request)

self._set_request_config(request.get('config', {}))

self._normalize_request_path(request)

path = self._get_top_level_module(request.get('path', ''))

if len(path) > 0 and path not in sys.path:

sys.path.insert(0, path)

lookup = request.get('lookup', 'completions')

if lookup == 'names':

return self._serialize_definitions(

jedi.api.names(

source=request.get('source', None),

path=request.get('path', ''),

all_scopes=True,

environment=self.environment),

request['id'])

script = jedi.Script(

source=request.get('source', None), line=request['line'] + 1,

column=request['column'], path=request.get('path', ''),

sys_path=sys.path, environment=self.environment)

if lookup == 'definitions':

defs = self._get_definitionsx(script.goto_assignments(follow_imports=True), request['id'])

return json.dumps({'id': request['id'], 'results': defs})

if lookup == 'tooltip':

if jediPreview:

defs = []

try:

defs = self._get_definitionsx(script.goto_definitions(), request['id'], True)

except:

pass

try:

if len(defs) == 0:

defs = self._get_definitionsx(script.goto_assignments(), request['id'], True)

except:

pass

return json.dumps({'id': request['id'], 'results': defs})

else:

try:

return self._serialize_tooltip(script.goto_definitions(), request['id'])

except:

return json.dumps({'id': request['id'], 'results': []})

elif lookup == 'arguments':

return self._serialize_arguments(

script, request['id'])

elif lookup == 'usages':

return self._serialize_usages(

script.usages(), request['id'])

elif lookup == 'methods':

return self._serialize_methods(script, request['id'],

request.get('prefix', ''))

else:

return self._serialize_completions(script, request['id'],

request.get('prefix', ''))

def _write_response(self, response):

sys.stdout.write(response + '\n')

sys.stdout.flush()

def watch(self):

while True:

try:

rq = self._input.readline()

if len(rq) == 0:

# Reached EOF - indication our parent process is gone.

sys.stderr.write('Received EOF from the standard input,exiting' + '\n')

sys.stderr.flush()

return

with RedirectStdout():

response = self._process_request(rq)

self._write_response(response)

except Exception:

sys.stderr.write(traceback.format_exc() + '\n')