mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-16 10:00:39 +00:00
446 lines
18 KiB
Python
446 lines
18 KiB
Python
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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
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# Copyright: (c) 2017, Ansible Project
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import copy
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import os
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import os.path
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import re
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import tempfile
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from ansible import constants as C
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from ansible.errors import AnsibleFileNotFound, AnsibleParserError
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from ansible.module_utils.basic import is_executable
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from ansible.module_utils.six import binary_type, text_type
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from ansible.module_utils._text import to_bytes, to_native, to_text
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from ansible.parsing.quoting import unquote
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from ansible.parsing.utils.yaml import from_yaml
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from ansible.parsing.vault import VaultLib, b_HEADER, is_encrypted, is_encrypted_file, parse_vaulttext_envelope
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from ansible.utils.path import unfrackpath
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try:
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from __main__ import display
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except ImportError:
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from ansible.utils.display import Display
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display = Display()
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# Tries to determine if a path is inside a role, last dir must be 'tasks'
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# this is not perfect but people should really avoid 'tasks' dirs outside roles when using Ansible.
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RE_TASKS = re.compile(u'(?:^|%s)+tasks%s?$' % (os.path.sep, os.path.sep))
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class DataLoader:
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'''
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The DataLoader class is used to load and parse YAML or JSON content,
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either from a given file name or from a string that was previously
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read in through other means. A Vault password can be specified, and
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any vault-encrypted files will be decrypted.
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Data read from files will also be cached, so the file will never be
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read from disk more than once.
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Usage:
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dl = DataLoader()
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# optionally: dl.set_vault_password('foo')
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ds = dl.load('...')
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ds = dl.load_from_file('/path/to/file')
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'''
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def __init__(self):
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self._basedir = '.'
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self._FILE_CACHE = dict()
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self._tempfiles = set()
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# initialize the vault stuff with an empty password
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# TODO: replace with a ref to something that can get the password
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# a creds/auth provider
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# self.set_vault_password(None)
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self._vaults = {}
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self._vault = VaultLib()
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self.set_vault_secrets(None)
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# TODO: since we can query vault_secrets late, we could provide this to DataLoader init
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def set_vault_secrets(self, vault_secrets):
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self._vault.secrets = vault_secrets
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def load(self, data, file_name='<string>', show_content=True):
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'''Backwards compat for now'''
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return from_yaml(data, file_name, show_content, self._vault.secrets)
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def load_from_file(self, file_name, cache=True, unsafe=False):
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''' Loads data from a file, which can contain either JSON or YAML. '''
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file_name = self.path_dwim(file_name)
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display.debug("Loading data from %s" % file_name)
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# if the file has already been read in and cached, we'll
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# return those results to avoid more file/vault operations
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if cache and file_name in self._FILE_CACHE:
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parsed_data = self._FILE_CACHE[file_name]
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else:
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# read the file contents and load the data structure from them
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(b_file_data, show_content) = self._get_file_contents(file_name)
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file_data = to_text(b_file_data, errors='surrogate_or_strict')
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parsed_data = self.load(data=file_data, file_name=file_name, show_content=show_content)
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# cache the file contents for next time
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self._FILE_CACHE[file_name] = parsed_data
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if unsafe:
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return parsed_data
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else:
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# return a deep copy here, so the cache is not affected
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return copy.deepcopy(parsed_data)
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def path_exists(self, path):
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path = self.path_dwim(path)
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return os.path.exists(to_bytes(path, errors='surrogate_or_strict'))
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def is_file(self, path):
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path = self.path_dwim(path)
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return os.path.isfile(to_bytes(path, errors='surrogate_or_strict')) or path == os.devnull
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def is_directory(self, path):
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path = self.path_dwim(path)
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return os.path.isdir(to_bytes(path, errors='surrogate_or_strict'))
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def list_directory(self, path):
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path = self.path_dwim(path)
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return os.listdir(path)
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def is_executable(self, path):
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'''is the given path executable?'''
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path = self.path_dwim(path)
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return is_executable(path)
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def _decrypt_if_vault_data(self, b_vault_data, b_file_name=None):
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'''Decrypt b_vault_data if encrypted and return b_data and the show_content flag'''
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if not is_encrypted(b_vault_data):
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show_content = True
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return b_vault_data, show_content
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b_ciphertext, b_version, cipher_name, vault_id = parse_vaulttext_envelope(b_vault_data)
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b_data = self._vault.decrypt(b_vault_data, filename=b_file_name)
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show_content = False
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return b_data, show_content
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def _get_file_contents(self, file_name):
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'''
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Reads the file contents from the given file name
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If the contents are vault-encrypted, it will decrypt them and return
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the decrypted data
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:arg file_name: The name of the file to read. If this is a relative
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path, it will be expanded relative to the basedir
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:raises AnsibleFileNotFOund: if the file_name does not refer to a file
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:raises AnsibleParserError: if we were unable to read the file
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:return: Returns a byte string of the file contents
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'''
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if not file_name or not isinstance(file_name, (binary_type, text_type)):
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raise AnsibleParserError("Invalid filename: '%s'" % to_native(file_name))
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b_file_name = to_bytes(self.path_dwim(file_name))
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# This is what we really want but have to fix unittests to make it pass
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# if not os.path.exists(b_file_name) or not os.path.isfile(b_file_name):
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if not self.path_exists(b_file_name):
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raise AnsibleFileNotFound("Unable to retrieve file contents", file_name=file_name)
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try:
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with open(b_file_name, 'rb') as f:
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data = f.read()
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return self._decrypt_if_vault_data(data, b_file_name)
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except (IOError, OSError) as e:
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raise AnsibleParserError("an error occurred while trying to read the file '%s': %s" % (file_name, to_native(e)), orig_exc=e)
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def get_basedir(self):
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''' returns the current basedir '''
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return self._basedir
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def set_basedir(self, basedir):
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''' sets the base directory, used to find files when a relative path is given '''
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if basedir is not None:
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self._basedir = to_text(basedir)
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def path_dwim(self, given):
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'''
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make relative paths work like folks expect.
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'''
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given = unquote(given)
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given = to_text(given, errors='surrogate_or_strict')
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if given.startswith(to_text(os.path.sep)) or given.startswith(u'~'):
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path = given
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else:
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basedir = to_text(self._basedir, errors='surrogate_or_strict')
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path = os.path.join(basedir, given)
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return unfrackpath(path, follow=False)
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def _is_role(self, path):
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''' imperfect role detection, roles are still valid w/o tasks|meta/main.yml|yaml|etc '''
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b_path = to_bytes(path, errors='surrogate_or_strict')
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b_upath = to_bytes(unfrackpath(path, follow=False), errors='surrogate_or_strict')
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for b_finddir in (b'meta', b'tasks'):
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for b_suffix in (b'.yml', b'.yaml', b''):
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b_main = b'main%s' % (b_suffix)
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b_tasked = os.path.join(b_finddir, b_main)
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if (
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RE_TASKS.search(path) and
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os.path.exists(os.path.join(b_path, b_main)) or
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os.path.exists(os.path.join(b_upath, b_tasked)) or
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os.path.exists(os.path.join(os.path.dirname(b_path), b_tasked))
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):
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return True
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return False
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def path_dwim_relative(self, path, dirname, source, is_role=False):
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'''
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find one file in either a role or playbook dir with or without
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explicitly named dirname subdirs
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Used in action plugins and lookups to find supplemental files that
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could be in either place.
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'''
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search = []
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source = to_text(source, errors='surrogate_or_strict')
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# I have full path, nothing else needs to be looked at
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if source.startswith(to_text(os.path.sep)) or source.startswith(u'~'):
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search.append(unfrackpath(source, follow=False))
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else:
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# base role/play path + templates/files/vars + relative filename
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search.append(os.path.join(path, dirname, source))
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basedir = unfrackpath(path, follow=False)
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# not told if role, but detect if it is a role and if so make sure you get correct base path
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if not is_role:
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is_role = self._is_role(path)
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if is_role and RE_TASKS.search(path):
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basedir = unfrackpath(os.path.dirname(path), follow=False)
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cur_basedir = self._basedir
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self.set_basedir(basedir)
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# resolved base role/play path + templates/files/vars + relative filename
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search.append(unfrackpath(os.path.join(basedir, dirname, source), follow=False))
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self.set_basedir(cur_basedir)
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if is_role and not source.endswith(dirname):
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# look in role's tasks dir w/o dirname
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search.append(unfrackpath(os.path.join(basedir, 'tasks', source), follow=False))
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# try to create absolute path for loader basedir + templates/files/vars + filename
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search.append(unfrackpath(os.path.join(dirname, source), follow=False))
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# try to create absolute path for loader basedir
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search.append(unfrackpath(os.path.join(basedir, source), follow=False))
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# try to create absolute path for dirname + filename
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search.append(self.path_dwim(os.path.join(dirname, source)))
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# try to create absolute path for filename
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search.append(self.path_dwim(source))
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for candidate in search:
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if os.path.exists(to_bytes(candidate, errors='surrogate_or_strict')):
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break
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return candidate
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def path_dwim_relative_stack(self, paths, dirname, source, is_role=False):
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'''
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find one file in first path in stack taking roles into account and adding play basedir as fallback
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:arg paths: A list of text strings which are the paths to look for the filename in.
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:arg dirname: A text string representing a directory. The directory
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is prepended to the source to form the path to search for.
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:arg source: A text string which is the filename to search for
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:rtype: A text string
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:returns: An absolute path to the filename ``source`` if found
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:raises: An AnsibleFileNotFound Exception if the file is found to exist in the search paths
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'''
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b_dirname = to_bytes(dirname)
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b_source = to_bytes(source)
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result = None
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search = []
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if source is None:
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display.warning('Invalid request to find a file that matches a "null" value')
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elif source and (source.startswith('~') or source.startswith(os.path.sep)):
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# path is absolute, no relative needed, check existence and return source
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test_path = unfrackpath(b_source, follow=False)
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if os.path.exists(to_bytes(test_path, errors='surrogate_or_strict')):
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result = test_path
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else:
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display.debug(u'evaluation_path:\n\t%s' % '\n\t'.join(paths))
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for path in paths:
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upath = unfrackpath(path, follow=False)
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b_upath = to_bytes(upath, errors='surrogate_or_strict')
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b_mydir = os.path.dirname(b_upath)
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# if path is in role and 'tasks' not there already, add it into the search
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if (is_role or self._is_role(path)) and b_mydir.endswith(b'tasks'):
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search.append(os.path.join(os.path.dirname(b_mydir), b_dirname, b_source))
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search.append(os.path.join(b_mydir, b_source))
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else:
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# don't add dirname if user already is using it in source
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if b_source.split(b'/')[0] != dirname:
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search.append(os.path.join(b_upath, b_dirname, b_source))
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search.append(os.path.join(b_upath, b_source))
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# always append basedir as last resort
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# don't add dirname if user already is using it in source
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if b_source.split(b'/')[0] != dirname:
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search.append(os.path.join(to_bytes(self.get_basedir()), b_dirname, b_source))
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search.append(os.path.join(to_bytes(self.get_basedir()), b_source))
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display.debug(u'search_path:\n\t%s' % to_text(b'\n\t'.join(search)))
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for b_candidate in search:
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display.vvvvv(u'looking for "%s" at "%s"' % (source, to_text(b_candidate)))
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if os.path.exists(b_candidate):
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result = to_text(b_candidate)
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break
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if result is None:
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raise AnsibleFileNotFound(file_name=source, paths=[to_text(p) for p in search])
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return result
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def _create_content_tempfile(self, content):
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''' Create a tempfile containing defined content '''
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fd, content_tempfile = tempfile.mkstemp()
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f = os.fdopen(fd, 'wb')
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content = to_bytes(content)
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try:
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f.write(content)
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except Exception as err:
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os.remove(content_tempfile)
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raise Exception(err)
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finally:
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f.close()
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return content_tempfile
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|
def get_real_file(self, file_path, decrypt=True):
|
||
|
|
"""
|
||
|
|
If the file is vault encrypted return a path to a temporary decrypted file
|
||
|
|
If the file is not encrypted then the path is returned
|
||
|
|
Temporary files are cleanup in the destructor
|
||
|
|
"""
|
||
|
|
|
||
|
|
if not file_path or not isinstance(file_path, (binary_type, text_type)):
|
||
|
|
raise AnsibleParserError("Invalid filename: '%s'" % to_native(file_path))
|
||
|
|
|
||
|
|
b_file_path = to_bytes(file_path, errors='surrogate_or_strict')
|
||
|
|
if not self.path_exists(b_file_path) or not self.is_file(b_file_path):
|
||
|
|
raise AnsibleFileNotFound(file_name=file_path)
|
||
|
|
|
||
|
|
real_path = self.path_dwim(file_path)
|
||
|
|
|
||
|
|
try:
|
||
|
|
if decrypt:
|
||
|
|
with open(to_bytes(real_path), 'rb') as f:
|
||
|
|
# Limit how much of the file is read since we do not know
|
||
|
|
# whether this is a vault file and therefore it could be very
|
||
|
|
# large.
|
||
|
|
if is_encrypted_file(f, count=len(b_HEADER)):
|
||
|
|
# if the file is encrypted and no password was specified,
|
||
|
|
# the decrypt call would throw an error, but we check first
|
||
|
|
# since the decrypt function doesn't know the file name
|
||
|
|
data = f.read()
|
||
|
|
if not self._vault.secrets:
|
||
|
|
raise AnsibleParserError("A vault password or secret must be specified to decrypt %s" % to_native(file_path))
|
||
|
|
|
||
|
|
data = self._vault.decrypt(data, filename=real_path)
|
||
|
|
# Make a temp file
|
||
|
|
real_path = self._create_content_tempfile(data)
|
||
|
|
self._tempfiles.add(real_path)
|
||
|
|
|
||
|
|
return real_path
|
||
|
|
|
||
|
|
except (IOError, OSError) as e:
|
||
|
|
raise AnsibleParserError("an error occurred while trying to read the file '%s': %s" % (to_native(real_path), to_native(e)), orig_exc=e)
|
||
|
|
|
||
|
|
def cleanup_tmp_file(self, file_path):
|
||
|
|
"""
|
||
|
|
Removes any temporary files created from a previous call to
|
||
|
|
get_real_file. file_path must be the path returned from a
|
||
|
|
previous call to get_real_file.
|
||
|
|
"""
|
||
|
|
if file_path in self._tempfiles:
|
||
|
|
os.unlink(file_path)
|
||
|
|
self._tempfiles.remove(file_path)
|
||
|
|
|
||
|
|
def cleanup_all_tmp_files(self):
|
||
|
|
for f in self._tempfiles:
|
||
|
|
try:
|
||
|
|
self.cleanup_tmp_file(f)
|
||
|
|
except Exception as e:
|
||
|
|
display.warning("Unable to cleanup temp files: %s" % to_native(e))
|
||
|
|
|
||
|
|
def find_vars_files(self, path, name, extensions=None, allow_dir=True):
|
||
|
|
"""
|
||
|
|
Find vars files in a given path with specified name. This will find
|
||
|
|
files in a dir named <name>/ or a file called <name> ending in known
|
||
|
|
extensions.
|
||
|
|
"""
|
||
|
|
|
||
|
|
b_path = to_bytes(os.path.join(path, name))
|
||
|
|
found = []
|
||
|
|
|
||
|
|
if extensions is None:
|
||
|
|
# Look for file with no extension first to find dir before file
|
||
|
|
extensions = [''] + C.YAML_FILENAME_EXTENSIONS
|
||
|
|
# add valid extensions to name
|
||
|
|
for ext in extensions:
|
||
|
|
|
||
|
|
if '.' in ext:
|
||
|
|
full_path = b_path + to_bytes(ext)
|
||
|
|
elif ext:
|
||
|
|
full_path = b'.'.join([b_path, to_bytes(ext)])
|
||
|
|
else:
|
||
|
|
full_path = b_path
|
||
|
|
|
||
|
|
if self.path_exists(full_path):
|
||
|
|
if self.is_directory(full_path):
|
||
|
|
if allow_dir:
|
||
|
|
found.extend(self._get_dir_vars_files(to_text(full_path), extensions))
|
||
|
|
else:
|
||
|
|
continue
|
||
|
|
else:
|
||
|
|
found.append(full_path)
|
||
|
|
break
|
||
|
|
return found
|
||
|
|
|
||
|
|
def _get_dir_vars_files(self, path, extensions):
|
||
|
|
found = []
|
||
|
|
for spath in sorted(self.list_directory(path)):
|
||
|
|
if not spath.startswith(u'.') and not spath.endswith(u'~'): # skip hidden and backups
|
||
|
|
|
||
|
|
ext = os.path.splitext(spath)[-1]
|
||
|
|
full_spath = os.path.join(path, spath)
|
||
|
|
|
||
|
|
if self.is_directory(full_spath) and not ext: # recursive search if dir
|
||
|
|
found.extend(self._get_dir_vars_files(full_spath, extensions))
|
||
|
|
elif self.is_file(full_spath) and (not ext or to_text(ext) in extensions):
|
||
|
|
# only consider files with valid extensions or no extension
|
||
|
|
found.append(full_spath)
|
||
|
|
|
||
|
|
return found
|