243 lines
8.4 KiB
Python
243 lines
8.4 KiB
Python
"""Analyze python import statements."""
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from __future__ import absolute_import, print_function
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import ast
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import os
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import uuid
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from lib.util import (
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display,
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ApplicationError,
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)
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VIRTUAL_PACKAGES = set([
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'ansible.module_utils.six',
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])
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def get_python_module_utils_imports(compile_targets):
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"""Return a dictionary of module_utils names mapped to sets of python file paths.
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:type compile_targets: list[TestTarget]
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:rtype: dict[str, set[str]]
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"""
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module_utils = enumerate_module_utils()
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virtual_utils = set(m for m in module_utils if any(m.startswith('%s.' % v) for v in VIRTUAL_PACKAGES))
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module_utils -= virtual_utils
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imports_by_target_path = {}
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for target in compile_targets:
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imports_by_target_path[target.path] = extract_python_module_utils_imports(target.path, module_utils)
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def recurse_import(import_name, depth=0, seen=None):
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"""Recursively expand module_utils imports from module_utils files.
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:type import_name: str
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:type depth: int
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:type seen: set[str] | None
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:rtype set[str]
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"""
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display.info('module_utils import: %s%s' % (' ' * depth, import_name), verbosity=4)
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if seen is None:
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seen = set([import_name])
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results = set([import_name])
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# virtual packages depend on the modules they contain instead of the reverse
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if import_name in VIRTUAL_PACKAGES:
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for sub_import in sorted(virtual_utils):
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if sub_import.startswith('%s.' % import_name):
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if sub_import in seen:
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continue
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seen.add(sub_import)
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matches = sorted(recurse_import(sub_import, depth + 1, seen))
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for result in matches:
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results.add(result)
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import_path = os.path.join('lib/', '%s.py' % import_name.replace('.', '/'))
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if import_path not in imports_by_target_path:
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import_path = os.path.join('lib/', import_name.replace('.', '/'), '__init__.py')
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if import_path not in imports_by_target_path:
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raise ApplicationError('Cannot determine path for module_utils import: %s' % import_name)
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# process imports in reverse so the deepest imports come first
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for name in sorted(imports_by_target_path[import_path], reverse=True):
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if name in virtual_utils:
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continue
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if name in seen:
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continue
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seen.add(name)
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matches = sorted(recurse_import(name, depth + 1, seen))
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for result in matches:
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results.add(result)
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return results
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for module_util in module_utils:
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# recurse over module_utils imports while excluding self
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module_util_imports = recurse_import(module_util)
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module_util_imports.remove(module_util)
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# add recursive imports to all path entries which import this module_util
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for target_path in imports_by_target_path:
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if module_util in imports_by_target_path[target_path]:
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for module_util_import in sorted(module_util_imports):
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if module_util_import not in imports_by_target_path[target_path]:
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display.info('%s inherits import %s via %s' % (target_path, module_util_import, module_util), verbosity=6)
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imports_by_target_path[target_path].add(module_util_import)
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imports = dict([(module_util, set()) for module_util in module_utils | virtual_utils])
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for target_path in imports_by_target_path:
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for module_util in imports_by_target_path[target_path]:
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imports[module_util].add(target_path)
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# for purposes of mapping module_utils to paths, treat imports of virtual utils the same as the parent package
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for virtual_util in virtual_utils:
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parent_package = '.'.join(virtual_util.split('.')[:-1])
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imports[virtual_util] = imports[parent_package]
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display.info('%s reports imports from parent package %s' % (virtual_util, parent_package), verbosity=6)
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for module_util in sorted(imports):
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if not len(imports[module_util]):
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display.warning('No imports found which use the "%s" module_util.' % module_util)
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return imports
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def enumerate_module_utils():
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"""Return a list of available module_utils imports.
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:rtype: set[str]
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"""
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module_utils = []
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base_path = 'lib/ansible/module_utils'
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for root, _, file_names in os.walk(base_path):
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for file_name in file_names:
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path = os.path.join(root, file_name)
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name, ext = os.path.splitext(file_name)
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if path == 'lib/ansible/module_utils/__init__.py':
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continue
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if ext != '.py':
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continue
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if name == '__init__':
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module_util = root
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else:
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module_util = os.path.join(root, name)
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module_utils.append(module_util[4:].replace('/', '.'))
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return set(module_utils)
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def extract_python_module_utils_imports(path, module_utils):
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"""Return a list of module_utils imports found in the specified source file.
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:type path: str
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:type module_utils: set[str]
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:rtype: set[str]
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"""
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with open(path, 'r') as module_fd:
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code = module_fd.read()
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try:
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tree = ast.parse(code)
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except SyntaxError as ex:
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# Treat this error as a warning so tests can be executed as best as possible.
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# The compile test will detect and report this syntax error.
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display.warning('%s:%s Syntax error extracting module_utils imports: %s' % (path, ex.lineno, ex.msg))
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return set()
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finder = ModuleUtilFinder(path, module_utils)
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finder.visit(tree)
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return finder.imports
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class ModuleUtilFinder(ast.NodeVisitor):
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"""AST visitor to find valid module_utils imports."""
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def __init__(self, path, module_utils):
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"""Return a list of module_utils imports found in the specified source file.
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:type path: str
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:type module_utils: set[str]
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"""
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self.path = path
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self.module_utils = module_utils
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self.imports = set()
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# implicitly import parent package
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if path.endswith('/__init__.py'):
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path = os.path.split(path)[0]
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if path.startswith('lib/ansible/module_utils/'):
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package = os.path.split(path)[0].replace('/', '.')[4:]
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if package != 'ansible.module_utils' and package not in VIRTUAL_PACKAGES:
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self.add_import(package, 0)
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# noinspection PyPep8Naming
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# pylint: disable=locally-disabled, invalid-name
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def visit_Import(self, node):
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"""
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:type node: ast.Import
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"""
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self.generic_visit(node)
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for alias in node.names:
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if alias.name.startswith('ansible.module_utils.'):
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# import ansible.module_utils.MODULE[.MODULE]
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self.add_import(alias.name, node.lineno)
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# noinspection PyPep8Naming
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# pylint: disable=locally-disabled, invalid-name
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def visit_ImportFrom(self, node):
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"""
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:type node: ast.ImportFrom
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"""
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self.generic_visit(node)
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if not node.module:
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return
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if node.module == 'ansible.module_utils' or node.module.startswith('ansible.module_utils.'):
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for alias in node.names:
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# from ansible.module_utils import MODULE[, MODULE]
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# from ansible.module_utils.MODULE[.MODULE] import MODULE[, MODULE]
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self.add_import('%s.%s' % (node.module, alias.name), node.lineno)
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def add_import(self, name, line_number):
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"""
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:type name: str
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:type line_number: int
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"""
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import_name = name
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while len(name) > len('ansible.module_utils.'):
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if name in self.module_utils:
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if name not in self.imports:
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display.info('%s:%d imports module_utils: %s' % (self.path, line_number, name), verbosity=5)
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self.imports.add(name)
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return # duplicate imports are ignored
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name = '.'.join(name.split('.')[:-1])
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if self.path.startswith('test/'):
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return # invalid imports in tests are ignored
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# Treat this error as a warning so tests can be executed as best as possible.
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# This error should be detected by unit or integration tests.
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display.warning('%s:%d Invalid module_utils import: %s' % (self.path, line_number, import_name))
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