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refactor.py
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397 lines (349 loc) · 11.6 KB
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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()
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