# Copyright (c) 2017 Ansible Project # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) # Make coding more python3-ish from __future__ import (absolute_import, division, print_function) __metaclass__ = type import os import sys import tempfile import yaml from collections import namedtuple from ansible.config.data import ConfigData from ansible.errors import AnsibleOptionsError, AnsibleError from ansible.module_utils.six import string_types from ansible.module_utils.six.moves import configparser from ansible.module_utils._text import to_text, to_bytes, to_native from ansible.module_utils.parsing.convert_bool import boolean from ansible.parsing.quoting import unquote from ansible.utils.path import unfrackpath from ansible.utils.path import makedirs_safe Plugin = namedtuple('Plugin','name type') Setting = namedtuple('Setting','name value origin') # FIXME: see if we can unify in module_utils with similar function used by argspec def ensure_type(value, value_type): ''' return a configuration variable with casting :arg value: The value to ensure correct typing of :kwarg value_type: The type of the value. This can be any of the following strings: :boolean: sets the value to a True or False value :integer: Sets the value to an integer or raises a ValueType error :float: Sets the value to a float or raises a ValueType error :list: Treats the value as a comma separated list. Split the value and return it as a python list. :none: Sets the value to None :path: Expands any environment variables and tilde's in the value. :tmp_path: Create a unique temporary directory inside of the directory specified by value and return its path. :pathlist: Treat the value as a typical PATH string. (On POSIX, this means colon separated strings.) Split the value and then expand each part for environment variables and tildes. ''' if value_type: value_type = value_type.lower() if value_type in ('boolean', 'bool'): value = boolean(value, strict=False) elif value: if value_type in ('integer', 'int'): value = int(value) elif value_type == 'float': value = float(value) elif value_type == 'list': if isinstance(value, string_types): value = [x.strip() for x in value.split(',')] elif value_type == 'none': if value == "None": value = None elif value_type == 'path': value = resolve_path(value) elif value_type in ('tmp', 'temppath', 'tmppath'): value = resolve_path(value) if not os.path.exists(value): makedirs_safe(value, 0o700) prefix = 'ansible-local-%s' % os.getpid() value = tempfile.mkdtemp(prefix=prefix, dir=value) elif value_type == 'pathlist': if isinstance(value, string_types): value = [resolve_path(x) for x in value.split(os.pathsep)] # defaults to string types elif isinstance(value, string_types): value = unquote(value) return to_text(value, errors='surrogate_or_strict', nonstring='passthru') # FIXME: see if this can live in utils/path def resolve_path(path): ''' resolve relative or 'varaible' paths ''' if '{{CWD}}' in path: # allow users to force CWD using 'magic' {{CWD}} path = path.replace('{{CWD}}', os.getcwd()) return unfrackpath(path, follow=False) # FIXME: generic file type? def get_config_type(cfile): ftype = None if cfile is not None: ext = os.path.splitext(cfile)[-1] if ext in ('.ini', '.cfg'): ftype = 'ini' elif ext in ('.yaml', '.yml'): ftype = 'yaml' else: raise AnsibleOptionsError("Unsupported configuration file extension for %s: %s" % (cfile, to_native(ext))) return ftype # FIXME: can move to module_utils for use for ini plugins also? def get_ini_config_value(p, entry): ''' returns the value of last ini entry found ''' value = None if p is not None: try: value = p.get(entry.get('section','defaults'), entry.get('key',''), raw=True) except: # FIXME: actually report issues here pass return value class ConfigManager(object): UNABLE = [] DEPRECATED = [] def __init__(self, conf_file=None): self._base_defs = {} self._plugins = {} self._parser = None self._config_file = conf_file self.data = ConfigData() #FIXME: make dynamic? scan for more? make it's own method? # Create configuration definitions from source bconfig_def = to_bytes('%s/base.yml' % os.path.dirname(__file__)) if os.path.exists(bconfig_def): with open(bconfig_def, 'rb') as config_def: self._base_defs = yaml.safe_load(config_def) else: raise AnsibleError("Missing base configuration definition file (bad install?): %s" % to_native(bconfig_def)) if self._config_file is None: # set config using ini self._config_file = self._find_ini_config_file() if self._config_file: if os.path.exists(self._config_file): # initialize parser and read config self._parse_config_file() # update constants self.update_config_data() def _parse_config_file(self, cfile=None): ''' return flat configuration settings from file(s) ''' # TODO: take list of files with merge/nomerge if cfile is None: cfile = self._config_file ftype = get_config_type(cfile) if cfile is not None: if ftype == 'ini': self._parser = configparser.ConfigParser() try: self._parser.read(cfile) except configparser.Error as e: raise AnsibleOptionsError("Error reading config file (%s): %s" % (cfile, to_native(e))) # FIXME: this should eventually handle yaml config files #elif ftype == 'yaml': # with open(cfile, 'rb') as config_stream: # self._parser = yaml.safe_load(config_stream) else: raise AnsibleOptionsError("Unsupported configuration file type: %s" % to_native(ftype)) def _find_yaml_config_files(self): ''' Load YAML Config Files in order, check merge flags, keep origin of settings''' pass def _find_ini_config_file(self): ''' Load INI Config File order(first found is used): ENV, CWD, HOME, /etc/ansible ''' # FIXME: eventually deprecate ini configs path0 = os.getenv("ANSIBLE_CONFIG", None) if path0 is not None: path0 = unfrackpath(path0, follow=False) if os.path.isdir(path0): path0 += "/ansible.cfg" try: path1 = os.getcwd() + "/ansible.cfg" except OSError: path1 = None path2 = unfrackpath("~/.ansible.cfg", follow=False) path3 = "/etc/ansible/ansible.cfg" for path in [path0, path1, path2, path3]: if path is not None and os.path.exists(path): break else: path = None return path def get_configuration_definitions(self, plugin_type=None, name=None): ''' just list the possible settings, either base or for specific plugins or plugin ''' ret = {} if plugin_type is None: ret = self._base_defs elif name is None: ret = self._plugins.get(plugin_type, {}) else: ret = {name: self._plugins.get(plugin_type, {}).get(name, {})} return ret def _loop_entries(self, container, entry_list): ''' repeat code for value entry assignment ''' value = None origin = None for entry in entry_list: name = entry.get('name') temp_value = container.get(name, None) if temp_value is not None: # only set if env var is defined value = temp_value origin = name # deal with deprecation of setting source, if used #FIXME: if entry.get('deprecated'): return value, origin def get_config_value(self, config, cfile=None, plugin_type=None, plugin_name=None, variables=None): ''' wrapper ''' value, _drop = self.get_config_value_and_origin(config, cfile=cfile, plugin_type=plugin_type, plugin_name=plugin_name, variables=variables) return value def get_config_value_and_origin(self, config, cfile=None, plugin_type=None, plugin_name=None, variables=None): ''' Given a config key figure out the actual value and report on the origin of the settings ''' if cfile is None: cfile = self._config_file # Note: sources that are lists listed in low to high precedence (last one wins) value = None defs = {} if plugin_type is None: defs = self._base_defs elif plugin_name is None: defs = self._plugins[plugin_type] else: defs = self._plugins[plugin_type][plugin_name] # Use 'variable overrides' if present, highest precedence, but only present when querying running play if variables: value, origin = self._loop_entries(variables, defs[config]['vars']) origin = 'var: %s' % origin # env vars are next precedence if value is None and defs[config].get('env'): value, origin = self._loop_entries(os.environ, defs[config]['env']) origin = 'env: %s' % origin # try config file entries next, if we have one if value is None and cfile is not None: ftype = get_config_type(cfile) if ftype and defs[config].get(ftype): if ftype == 'ini': # load from ini config try: # FIXME: generaelize _loop_entries to allow for files also for ini_entry in defs[config]['ini']: value = get_ini_config_value(self._parser, ini_entry) origin = cfile #FIXME: if ini_entry.get('deprecated'): except Exception as e: sys.stderr.write("Error while loading ini config %s: %s" % (cfile, to_native(e))) elif ftype == 'yaml': pass # FIXME: implement, also , break down key from defs (. notation???) origin = cfile ''' # for plugins, try using existing constants, this is for backwards compatiblity if plugin_name and defs[config].get('constants'): value, origin = self._loop_entries(self.data, defs[config]['constants']) origin = 'constant: %s' % origin ''' # set default if we got here w/o a value if value is None: value = defs[config].get('default') origin = 'default' # FIXME: moved eval to constants as this does not have access to previous vars if plugin_type is None and isinstance(value, string_types) and (value.startswith('eval(') and value.endswith(')')): return value, origin #default_value = defs[config].get('default') #if plugin_type is None and isinstance(default_value, string_types) and (default_value.startswith('eval(') and default_value.endswith(')')): # try: # eval_string = default_value.replace('eval(', '', 1)[:-1] # value = eval(eval_string) # FIXME: safe eval? # except: # value = default_value #else: # value = default_value # ensure correct type try: value = ensure_type(value, defs[config].get('type')) except Exception as e: self.UNABLE.append(config) # deal with deprecation of the setting if defs[config].get('deprecated') and origin != 'default': self.DEPRECATED.append((config, defs[config].get('deprecated'))) return value, origin def update_plugin_config(self, plugin_type, name, defs): ''' really: update constants ''' # no sense? self.initialize_plugin_configuration_definitions(plugin_type, name, defs) self.update_config_data(defs) def initialize_plugin_configuration_definitions(self, plugin_type, name, defs): if plugin_type not in self._plugins: self._plugins[plugin_type] = {} self._plugins[plugin_type][name] = defs def update_config_data(self, defs=None, configfile=None): ''' really: update constants ''' if defs is None: defs = self._base_defs if configfile is None: configfile = self._config_file if not isinstance(defs, dict): raise AnsibleOptionsError("Invalid configuration definition type: %s for %s" % (type(defs), defs)) # update the constant for config file self.data.update_setting(Setting('CONFIG_FILE', configfile, '')) origin = None # env and config defs can have several entries, ordered in list from lowest to highest precedence for config in defs: if not isinstance(defs[config], dict): raise AnsibleOptionsError("Invalid configuration definition '%s': type is %s" % (to_native(config), type(defs[config]))) # get value and origin value, origin = self.get_config_value_and_origin(config, configfile) # set the constant self.data.update_setting(Setting(config, value, origin)) # FIXME: find better way to do this by passing back to where display is available if self.UNABLE: sys.stderr.write("Unable to set correct type for:\n\t%s\n" % '\n\t'.join(self.UNABLE)) if self.DEPRECATED: for k, reason in self.DEPRECATED: sys.stderr.write("[DEPRECATED] %(k)s: %(why)s. It will be removed in %(version)s. As alternative use one of [%(alternatives)s]\n" % dict(k=k, **reason))