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Copy pathcompletion.py
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663 lines (591 loc) · 25 KB
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import os
import io
import re
import sys
import json
import traceback
import platform
jediPreview = False
class RedirectStdout(object):
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)
os.close(self.oldstdout_fno)
class JediCompletion(object):
basic_types = {
'module': 'import',
'instance': 'variable',
'statement': 'value',
'param': 'variable',
}
def __init__(self):
self.default_sys_path = sys.path
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.
Jedi will use current filepath to look for another modules at same
path, but it will not be able to see modules **above**, so our goal
is to find the higher python module available from filepath.
"""
_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.
Returns:
Tuple with original signature object, name and value.
"""
_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.
Returns:
Array with dictionary
"""
_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.
Args:
script: Instance of jedi.api.Script object.
identifier: Unique completion identifier to pass back to VSCode.
prefix: String with prefix to filter function arguments.
Used only when fuzzy matcher turned off.
Returns:
Serialized string to send to 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.
Args:
script: Instance of jedi.api.Script object.
identifier: Unique completion identifier to pass back to VSCode.
Returns:
Serialized string to send to 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
For regular symbols it returns the start and end location of the
characters making up the symbol.
For scoped containers it will return the entire definition of the
scope.
The scope that jedi provides ends with the first character of the next
scope so it's not ideal. For vscode we need the scope to end with the
last character of actual code. That's why we extract the lines that
make up our scope and trim the trailing whitespace.
"""
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.
Args:
definitions: List of jedi.api.classes.Definition objects.
identifier: Unique completion identifier to pass back to VSCode.
Returns:
Serialized string to send to 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.
Args:
definitions: List of jedi.api.classes.Definition objects.
identifier: Unique completion identifier to pass back to VSCode.
Returns:
Serialized string to send to 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.
Args:
request: String with raw request from VSCode.
Returns:
Python dictionary with request data.
"""
return json.loads(request)
def _set_request_config(self, config):
"""Sets config values for current request.
This includes sys.path modifications which is getting restored to
default value on each request so each project should be isolated
from each other.
Args:
config: Dictionary with config values.
"""
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
Python. Does not alter the reverse os.path.sep=='\\',
i.e. *nix paths received by a Windows build of Python.
"""
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 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),
request['id'])
script = jedi.api.Script(
source=request.get('source', None), line=request['line'] + 1,
column=request['column'], path=request.get('path', ''))
if lookup == 'definitions':
defs = []
try:
defs = self._get_definitionsx(script.goto_assignments(follow_imports=False), request['id'])
except:
pass
try:
if len(defs) == 0:
defs = self._get_definitionsx(script.goto_definitions(), request['id'])
except:
pass
try:
if len(defs) == 0:
defs = self._get_definitionsx(script.goto_assignments(), request['id'])
except:
pass
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')
sys.stderr.flush()
if __name__ == '__main__':
cachePrefix = 'v'
modulesToLoad = ''
if len(sys.argv) > 2 and sys.argv[1] == 'custom':
jediPath = sys.argv[2]
jediPreview = True
cachePrefix = 'custom_v'
if len(sys.argv) > 3:
modulesToLoad = sys.argv[3]
else:
#release
jediPath = os.path.dirname(__file__)
if len(sys.argv) > 1:
modulesToLoad = sys.argv[1]
sys.path.insert(0, jediPath)
import jedi
if jediPreview:
jedi.settings.cache_directory = os.path.join(
jedi.settings.cache_directory, cachePrefix + jedi.__version__.replace('.', ''))
# remove jedi from path after we import it so it will not be completed
sys.path.pop(0)
if len(modulesToLoad) > 0:
jedi.preload_module(*modulesToLoad.split(','))
JediCompletion().watch()