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#! /usr/bin/python
import ast
import yaml
class DefinitionVisitor(ast.NodeVisitor):
def __init__(self):
super(DefinitionVisitor, self).__init__()
self.functions = {}
self.classes = {}
self.names = {}
self.attrs = set()
self.definitions = {
'def': self.functions,
'class': self.classes,
'names': self.names,
'attrs': self.attrs,
}
def visit_Name(self, node):
self.names.setdefault(type(node.ctx).__name__, set()).add(node.id)
def visit_Attribute(self, node):
self.attrs.add(node.attr)
for child in ast.iter_child_nodes(node):
self.visit(child)
def visit_ClassDef(self, node):
visitor = DefinitionVisitor()
self.classes[node.name] = visitor.definitions
for child in ast.iter_child_nodes(node):
visitor.visit(child)
def visit_FunctionDef(self, node):
visitor = DefinitionVisitor()
self.functions[node.name] = visitor.definitions
for child in ast.iter_child_nodes(node):
visitor.visit(child)
def non_empty(defs):
functions = {name: non_empty(f) for name, f in defs['def'].items()}
classes = {name: non_empty(f) for name, f in defs['class'].items()}
result = {}
if functions: result['def'] = functions
if classes: result['class'] = classes
names = defs['names']
uses = []
for name in names.get('Load', ()):
if name not in names.get('Param', ()) and name not in names.get('Store', ()):
uses.append(name)
uses.extend(defs['attrs'])
if uses: result['uses'] = uses
result['names'] = names
result['attrs'] = defs['attrs']
return result
def definitions_in_code(input_code):
input_ast = ast.parse(input_code)
visitor = DefinitionVisitor()
visitor.visit(input_ast)
definitions = non_empty(visitor.definitions)
return definitions
def definitions_in_file(filepath):
with open(filepath) as f:
return definitions_in_code(f.read())
def defined_names(prefix, defs, names):
for name, funcs in defs.get('def', {}).items():
names.setdefault(name, {'defined': []})['defined'].append(prefix + name)
defined_names(prefix + name + ".", funcs, names)
for name, funcs in defs.get('class', {}).items():
names.setdefault(name, {'defined': []})['defined'].append(prefix + name)
defined_names(prefix + name + ".", funcs, names)
def used_names(prefix, defs, names):
for name, funcs in defs.get('def', {}).items():
used_names(prefix + name + ".", funcs, names)
for name, funcs in defs.get('class', {}).items():
used_names(prefix + name + ".", funcs, names)
for used in defs.get('uses', ()):
if used in names:
names[used].setdefault('used', []).append(prefix.rstrip('.'))
if __name__ == '__main__':
import sys, os
if not sys.argv[1:]:
sys.stderr.write(
"Usage: definitions.py <directory> <regexp>\n"
" definitions.py <directory>\n"
"Either list the definitions matching the regexp or list\n"
" 'unused' definitions\n"
)
definitions = {}
for root, dirs, files in os.walk(sys.argv[1]):
for filename in files:
if filename.endswith(".py"):
filepath = os.path.join(root, filename)
definitions[filepath] = definitions_in_file(filepath)
names = {}
for filepath, defs in definitions.items():
defined_names(filepath + ":", defs, names)
for filepath, defs in definitions.items():
used_names(filepath + ":", defs, names)
if sys.argv[2:]:
import re
pattern = re.compile(sys.argv[2])
for name in list(names):
if not pattern.match(name):
del names[name]
else:
for name in list(names):
if 'used' in names[name]:
del names[name]
yaml.dump(names, sys.stdout, default_flow_style=False)
#yaml.dump(definitions, sys.stdout, default_flow_style=False)