vscode-python/pythonFiles/refactor.py at master · epicfaace/vscode-python · GitHub

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# Arguments are:

# 1. Working directory.

# 2. Rope folder

import difflib

import io

import json

import os

import sys

import traceback

try:

import rope

from rope.base import libutils

from rope.refactor.rename import Rename

from rope.refactor.extract import ExtractMethod, ExtractVariable

import rope.base.project

import rope.base.taskhandle

except:

jsonMessage = {

"error": True,

"message": "Rope not installed",

"traceback": "",

"type": "ModuleNotFoundError",

}

sys.stderr.write(json.dumps(jsonMessage))

sys.stderr.flush()

WORKSPACE_ROOT = sys.argv[1]

ROPE_PROJECT_FOLDER = ".vscode/.ropeproject"

class RefactorProgress:

"""

Refactor progress information

"""

def __init__(self, name="Task Name", message=None, percent=0):

self.name = name

self.message = message

self.percent = percent

class ChangeType:

"""

Change Type Enum

"""

EDIT = 0

NEW = 1

DELETE = 2

class Change:

"""

EDIT = 0

NEW = 1

DELETE = 2

def __init__(self, filePath, fileMode=ChangeType.EDIT, diff=""):

self.filePath = filePath

self.diff = diff

self.fileMode = fileMode

def get_diff(changeset):

"""This is a copy of the code form the ChangeSet.get_description method found in Rope."""

new = changeset.new_contents

old = changeset.old_contents

if old is None:

if changeset.resource.exists():

old = changeset.resource.read()

else:

old = ""

# Ensure code has a trailing empty lines, before generating a diff.

# https://github.com/Microsoft/vscode-python/issues/695.

old_lines = old.splitlines(True)

if not old_lines[-1].endswith("\n"):

old_lines[-1] = old_lines[-1] + os.linesep

new = new + os.linesep

result = difflib.unified_diff(

old_lines,

new.splitlines(True),

"a/" + changeset.resource.path,

"b/" + changeset.resource.path,

)

return "".join(list(result))

class BaseRefactoring(object):

"""

Base class for refactorings

"""

def __init__(self, project, resource, name="Refactor", progressCallback=None):

self._progressCallback = progressCallback

self._handle = rope.base.taskhandle.TaskHandle(name)

self._handle.add_observer(self._update_progress)

self.project = project

self.resource = resource

self.changes = []

def _update_progress(self):

jobset = self._handle.current_jobset()

if jobset and not self._progressCallback is None:

progress = RefactorProgress()

# getting current job set name

if jobset.get_name() is not None:

progress.name = jobset.get_name()

# getting active job name

if jobset.get_active_job_name() is not None:

progress.message = jobset.get_active_job_name()

# adding done percent

percent = jobset.get_percent_done()

if percent is not None:

progress.percent = percent

if not self._progressCallback is None:

self._progressCallback(progress)

def stop(self):

self._handle.stop()

def refactor(self):

try:

self.onRefactor()

except rope.base.exceptions.InterruptedTaskError:

# we can ignore this exception, as user has cancelled refactoring

pass

def onRefactor(self):

"""

To be implemented by each base class

"""

pass

class RenameRefactor(BaseRefactoring):

def __init__(

self,

project,

resource,

name="Rename",

progressCallback=None,

startOffset=None,

newName="new_Name",

BaseRefactoring.__init__(self, project, resource, name, progressCallback)

self._newName = newName

self.startOffset = startOffset

def onRefactor(self):

renamed = Rename(self.project, self.resource, self.startOffset)

changes = renamed.get_changes(self._newName, task_handle=self._handle)

for item in changes.changes:

if isinstance(item, rope.base.change.ChangeContents):

self.changes.append(

Change(item.resource.real_path, ChangeType.EDIT, get_diff(item))

)

else:

raise Exception("Unknown Change")

class ExtractVariableRefactor(BaseRefactoring):

def __init__(

self,

project,

resource,

name="Extract Variable",

progressCallback=None,

startOffset=None,

endOffset=None,

newName="new_Name",

similar=False,

global_=False,

BaseRefactoring.__init__(self, project, resource, name, progressCallback)

self._newName = newName

self._startOffset = startOffset

self._endOffset = endOffset

self._similar = similar

self._global = global_

def onRefactor(self):

renamed = ExtractVariable(

self.project, self.resource, self._startOffset, self._endOffset

)

changes = renamed.get_changes(self._newName, self._similar, self._global)

for item in changes.changes:

if isinstance(item, rope.base.change.ChangeContents):

self.changes.append(

Change(item.resource.real_path, ChangeType.EDIT, get_diff(item))

)

else:

raise Exception("Unknown Change")

class ExtractMethodRefactor(ExtractVariableRefactor):

def __init__(

self,

project,

resource,

name="Extract Method",

progressCallback=None,

startOffset=None,

endOffset=None,

newName="new_Name",

similar=False,

global_=False,

ExtractVariableRefactor.__init__(

self,

project,

resource,

name,

progressCallback,

startOffset=startOffset,

endOffset=endOffset,

newName=newName,

similar=similar,

global_=global_,

)

def onRefactor(self):

renamed = ExtractMethod(

self.project, self.resource, self._startOffset, self._endOffset

)

changes = renamed.get_changes(self._newName, self._similar, self._global)

for item in changes.changes:

if isinstance(item, rope.base.change.ChangeContents):

self.changes.append(

Change(item.resource.real_path, ChangeType.EDIT, get_diff(item))

)

else:

raise Exception("Unknown Change")

class RopeRefactoring(object):

def __init__(self):

self.default_sys_path = sys.path

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

def _rename(self, filePath, start, newName, indent_size):

"""

Renames a variable

"""

project = rope.base.project.Project(

WORKSPACE_ROOT,

ropefolder=ROPE_PROJECT_FOLDER,

save_history=False,

indent_size=indent_size,

)

resourceToRefactor = libutils.path_to_resource(project, filePath)

refactor = RenameRefactor(

project, resourceToRefactor, startOffset=start, newName=newName

)

refactor.refactor()

changes = refactor.changes

project.close()

valueToReturn = []

for change in changes:

valueToReturn.append({"diff": change.diff})

return valueToReturn

def _extractVariable(self, filePath, start, end, newName, indent_size):

"""

Extracts a variable

"""

project = rope.base.project.Project(

WORKSPACE_ROOT,

ropefolder=ROPE_PROJECT_FOLDER,

save_history=False,

indent_size=indent_size,

)

resourceToRefactor = libutils.path_to_resource(project, filePath)

refactor = ExtractVariableRefactor(

project,

resourceToRefactor,

startOffset=start,

endOffset=end,

newName=newName,

similar=True,

)

refactor.refactor()

changes = refactor.changes

project.close()

valueToReturn = []

for change in changes:

valueToReturn.append({"diff": change.diff})

return valueToReturn

def _extractMethod(self, filePath, start, end, newName, indent_size):

"""

Extracts a method

"""

project = rope.base.project.Project(

WORKSPACE_ROOT,

ropefolder=ROPE_PROJECT_FOLDER,

save_history=False,

indent_size=indent_size,

)

resourceToRefactor = libutils.path_to_resource(project, filePath)

refactor = ExtractMethodRefactor(

project,

resourceToRefactor,

startOffset=start,

endOffset=end,

newName=newName,

similar=True,

)

refactor.refactor()

changes = refactor.changes

project.close()

valueToReturn = []

for change in changes:

valueToReturn.append({"diff": change.diff})

return valueToReturn

def _serialize(self, identifier, results):

"""

Serializes the refactor results

"""

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

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 _process_request(self, request):

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

"""

request = self._deserialize(request)

lookup = request.get("lookup", "")

if lookup == "":

pass

elif lookup == "rename":

changes = self._rename(

request["file"],

int(request["start"]),

request["name"],

int(request["indent_size"]),

)

return self._write_response(self._serialize(request["id"], changes))

elif lookup == "extract_variable":

changes = self._extractVariable(

request["file"],

int(request["start"]),

int(request["end"]),

request["name"],

int(request["indent_size"]),

)

return self._write_response(self._serialize(request["id"], changes))

elif lookup == "extract_method":

changes = self._extractMethod(

request["file"],

int(request["start"]),

int(request["end"]),

request["name"],

int(request["indent_size"]),

)

return self._write_response(self._serialize(request["id"], changes))

def _write_response(self, response):

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

sys.stdout.flush()

def watch(self):

self._write_response("STARTED")

while True:

try:

self._process_request(self._input.readline())

except:

exc_type, exc_value, exc_tb = sys.exc_info()

tb_info = traceback.extract_tb(exc_tb)

jsonMessage = {

"error": True,

"message": str(exc_value),

"traceback": str(tb_info),

"type": str(exc_type),

}

sys.stderr.write(json.dumps(jsonMessage))

sys.stderr.flush()

if __name__ == "__main__":

RopeRefactoring().watch()

vscode-python/pythonFiles/refactor.py at master · epicfaace/vscode-python · GitHub

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