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363 lines
14 KiB
Python
363 lines
14 KiB
Python
"""Analyze python import statements."""
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import ast
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import os
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import re
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from . import types as t
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from .io import (
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read_binary_file,
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)
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from .util import (
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display,
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ApplicationError,
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is_subdir,
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)
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from .data import (
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data_context,
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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): # type: (str, int, t.Optional[t.Set[str]]) -> t.Set[str]
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"""Recursively expand module_utils imports from module_utils files."""
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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 = get_import_path(import_name)
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if import_path not in imports_by_target_path:
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import_path = get_import_path(import_name, package=True)
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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 imports[module_util]:
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package_path = get_import_path(module_util, package=True)
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if os.path.exists(package_path) and not os.path.getsize(package_path):
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continue # ignore empty __init__.py files
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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 get_python_module_utils_name(path): # type: (str) -> str
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"""Return a namespace and name from the given module_utils path."""
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base_path = data_context().content.module_utils_path
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if data_context().content.collection:
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prefix = 'ansible_collections.' + data_context().content.collection.prefix + 'plugins.module_utils'
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else:
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prefix = 'ansible.module_utils'
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if path.endswith('/__init__.py'):
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path = os.path.dirname(path)
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if path == base_path:
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name = prefix
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else:
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name = prefix + '.' + os.path.splitext(os.path.relpath(path, base_path))[0].replace(os.path.sep, '.')
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return name
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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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for path in data_context().content.walk_files(data_context().content.module_utils_path):
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ext = os.path.splitext(path)[1]
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if ext != '.py':
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continue
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module_utils.append(get_python_module_utils_name(path))
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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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# Python code must be read as bytes to avoid a SyntaxError when the source uses comments to declare the file encoding.
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# See: https://www.python.org/dev/peps/pep-0263
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# Specifically: If a Unicode string with a coding declaration is passed to compile(), a SyntaxError will be raised.
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code = read_binary_file(path)
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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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def get_import_path(name, package=False): # type: (str, bool) -> str
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"""Return a path from an import name."""
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if package:
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filename = os.path.join(name.replace('.', '/'), '__init__.py')
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else:
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filename = '%s.py' % name.replace('.', '/')
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if name.startswith('ansible.module_utils.') or name == 'ansible.module_utils':
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path = os.path.join('lib', filename)
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elif data_context().content.collection and (
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name.startswith('ansible_collections.%s.plugins.module_utils.' % data_context().content.collection.full_name) or
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name == 'ansible_collections.%s.plugins.module_utils' % data_context().content.collection.full_name):
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path = '/'.join(filename.split('/')[3:])
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else:
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raise Exception('Unexpected import name: %s' % name)
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return path
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def path_to_module(path): # type: (str) -> str
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"""Convert the given path to a module name."""
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module = os.path.splitext(path)[0].replace(os.path.sep, '.')
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if module.endswith('.__init__'):
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module = module[:-9]
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return module
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def relative_to_absolute(name, level, module, path, lineno): # type: (str, int, str, str, int) -> str
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"""Convert a relative import to an absolute import."""
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if level <= 0:
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absolute_name = name
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elif not module:
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display.warning('Cannot resolve relative import "%s%s" in unknown module at %s:%d' % ('.' * level, name, path, lineno))
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absolute_name = 'relative.nomodule'
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else:
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parts = module.split('.')
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if level >= len(parts):
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display.warning('Cannot resolve relative import "%s%s" above module "%s" at %s:%d' % ('.' * level, name, module, path, lineno))
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absolute_name = 'relative.abovelevel'
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else:
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absolute_name = '.'.join(parts[:-level] + [name])
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return absolute_name
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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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self.module = None
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if data_context().content.is_ansible:
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# Various parts of the Ansible source tree execute within diffent modules.
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# To support import analysis, each file which uses relative imports must reside under a path defined here.
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# The mapping is a tuple consisting of a path pattern to match and a replacement path.
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# During analyis, any relative imports not covered here will result in warnings, which can be fixed by adding the appropriate entry.
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path_map = (
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('^hacking/build_library/build_ansible/', 'build_ansible/'),
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('^lib/ansible/', 'ansible/'),
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('^test/lib/ansible_test/_data/sanity/validate-modules/', 'validate_modules/'),
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('^test/units/', 'test/units/'),
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('^test/lib/ansible_test/_internal/', 'ansible_test/_internal/'),
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('^test/integration/targets/.*/ansible_collections/(?P<ns>[^/]*)/(?P<col>[^/]*)/', r'ansible_collections/\g<ns>/\g<col>/'),
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('^test/integration/targets/.*/library/', 'ansible/modules/'),
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)
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for pattern, replacement in path_map:
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if re.search(pattern, self.path):
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revised_path = re.sub(pattern, replacement, self.path)
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self.module = path_to_module(revised_path)
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break
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else:
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# This assumes that all files within the collection are executed by Ansible as part of the collection.
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# While that will usually be true, there are exceptions which will result in this resolution being incorrect.
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self.module = path_to_module(os.path.join(data_context().content.collection.directory, self.path))
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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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# import ansible.module_utils.MODULE[.MODULE]
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# import ansible_collections.{ns}.{col}.plugins.module_utils.module_utils.MODULE[.MODULE]
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self.add_imports([alias.name for alias in node.names], 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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module = relative_to_absolute(node.module, node.level, self.module, self.path, node.lineno)
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if not module.startswith('ansible'):
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return
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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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# from ansible_collections.{ns}.{col}.plugins.module_utils import MODULE[, MODULE]
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# from ansible_collections.{ns}.{col}.plugins.module_utils.MODULE[.MODULE] import MODULE[, MODULE]
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self.add_imports(['%s.%s' % (module, alias.name) for alias in node.names], 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 self.is_module_util_name(name):
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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 is_subdir(self.path, data_context().content.test_path):
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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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def add_imports(self, names, line_no): # type: (t.List[str], int) -> None
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"""Add the given import names if they are module_utils imports."""
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for name in names:
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if self.is_module_util_name(name):
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self.add_import(name, line_no)
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@staticmethod
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def is_module_util_name(name): # type: (str) -> bool
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"""Return True if the given name is a module_util name for the content under test. External module_utils are ignored."""
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if data_context().content.is_ansible and name.startswith('ansible.module_utils.'):
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return True
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if data_context().content.collection and name.startswith('ansible_collections.%s.plugins.module_utils.' % data_context().content.collection.full_name):
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return True
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return False
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