def process_body(self, body):
"""Finds desired varnames in body and instantiate operation"""
oper = self.operation
lines = self.lines
if oper == "detect":
self.result = DetectOperation()
for stmt in body:
if is_assign_to_name(stmt):
if stmt.targets[0].id == self.varname and oper == "delete":
self.remove_stmt(stmt)
break
elif stmt.targets[0].id > self.varname and oper == "insert":
self.insert(stmt.first_line, False)
break
elif self.operation == "detect":
self.result.work_list.append((
stmt.targets[0].id,
stmt.value.args[0].args[1].s,
pyposast.extract_code(lines, stmt),
stmt.value.args[0].args[0].n,
))
elif self.operation == "detect" and is_call_statement(stmt):
self.result.citations.append((
pyposast.extract_code(lines, stmt.value.args[0].args[0]),
pyposast.extract_code(lines, stmt.value.args[0].args[1]),
pyposast.extract_code(lines, stmt.value),
isinstance(stmt.value.args[0].args[1], ast.Name),
))
if body and self.operation == "insert" and not self.result:
self.insert(stmt.last_line, True)
def node_code(self, node):
"""Use PyPosAST positions to extract node text"""
return extract_code(self.lcode,
node,
lstrip=" \t",
ljoin="",
strip="() \t")
def remove_keyword(self, keyword, remove_lines):
"""Instantiate an operation to remove a keyword"""
if not remove_lines:
warnings.warn(
"PyPosAST bug"
"Wrong positions for keywords. Won't delete attribute")
self.result = DelOperation(keyword.value, remove_lines)
self.old = keyword.arg + "=" + pyposast.extract_code(
self.lines, keyword.value)
def process_body(self, body):
"""Find citation/import and applies the desired `.operation`"""
if self.operation in ("find", "detect"):
self.result = DetectOperation()
last_line = 0
for stmt in body:
if isinstance(stmt, ast.ImportFrom) and stmt.module is not None:
year = int(getattr(re.search(r"work\.y(\d\d\d\d)", stmt.module), "group", lambda x: -1)(1))
if self.year == year and self.operation == "remove import":
aliases = [a for a in stmt.names if a.name == self.varname]
if aliases:
if len(stmt.names) == 1:
self.result = DelOperation(stmt, True)
self.old = pyposast.extract_code(self.lines, stmt)
elif aliases[0] == stmt.names[-1]:
line = "".join(reversed(self.lines[aliases[0].last_line - 1]))
pos = len(line) - aliases[0].first_col
aliases[0].first_col = len(line) - next(re.compile("\w.*").finditer(line, pos=pos)).span()[0]
self.result = DelOperation(aliases[0], False)
self.old = pyposast.extract_code(self.lines, aliases[0])
else:
line = self.lines[aliases[0].last_line - 1]
pos = aliases[0].last_col
aliases[0].last_col = next(re.compile("\w.*").finditer(line, pos=pos)).span()[0]
self.result = DelOperation(aliases[0], False)
self.old = pyposast.extract_code(self.lines, aliases[0])
break
if self.operation == "insert import":
last_line = stmt.first_line
if self.year < year:
self.result = InsertOperation(stmt.first_line, False, add_line=False)
break
if year != -1 and self.operation == "detect":
self.result.imports += [a.name for a in stmt.names]
if is_call_statement(stmt):
if self.operation == "insert import":
self.result = InsertOperation(last_line + 1, False, add_line=False)
break
target = pyposast.extract_code(self.lines, stmt.value.args[0].args[1])
source = pyposast.extract_code(self.lines, stmt.value.args[0].args[0])
if self.operation == "remove target" and target == self.varname:
self.result = DelOperation(stmt, True)
self.old = source + "<=>" + pyposast.extract_code(self.lines, stmt)
break
if self.operation == "remove source" and source == self.varname:
self.result = DelOperation(stmt, True)
self.old = target + "<=>" + pyposast.extract_code(self.lines, stmt)
break
if self.operation == "find" and self.varname in (source, target):
self.result.citations.append(self.varname)
if self.operation == "detect":
self.result.citations.append((source, target))
if self.operation == "insert import" and not self.result:
self.result = InsertOperation(last_line + 1, True, add_line=True)
def remove_stmt(self, stmt):
"""Instantiate an operation to remove the stmt"""
self.result = DelOperation(stmt, True)
self.old = pyposast.extract_code(self.lines, stmt)
def replace(self, node):
"""Instantiate a replace operation"""
self.result = ReplaceOperation(node)
self.old = pyposast.extract_code(self.lines, node)
def extract_code(self, node):
"""Use PyPosAST to extract node text without strips"""
return extract_code(self.lcode, node)
def extract_code(self, node):
"""Use PyPosAST to extract node text without strips"""
return extract_code(self.lcode, node)
def node_code(self, node):
"""Use PyPosAST positions to extract node text"""
return extract_code(
self.lcode, node, lstrip=" \t", ljoin="", strip="() \t"
)
