diff --git a/doc/architecture.png b/doc/architecture.png deleted file mode 100644 index fecefa0..0000000 Binary files a/doc/architecture.png and /dev/null differ diff --git a/doc/config.txt b/doc/config.txt index e677a0e..681a4f8 100644 --- a/doc/config.txt +++ b/doc/config.txt @@ -4,37 +4,13 @@ Configuration handling basics =============================== -Main Assumption -=============== - -Configuration option objects `config.Config()` are produced at the -entry points and handed down to where they are actually used. This keeps -configuration local but available everywhere and consistent. - `Config` and `Option` objects ========================================= -Configuration option objects can be created in different ways. Let's perform -very basic :class:`tiramisu.config.Config` object manipulations: - -:: - - >>> from tiramisu.config import Config - >>> from tiramisu.option import OptionDescription, BoolOption - >>> descr = OptionDescription("optgroup", "", [ - ... BoolOption("bool", "", default=False)]) - >>> - >>> config = Config(descr) - >>> config.bool - False - >>> config.bool = True - >>> config.bool - True Take a look at `test_config.test_base_config()` or `test_config.test_base_config_and_groups()`. - Accessing the configuration `Option`'s ----------------------------------------- @@ -134,23 +110,3 @@ the value owner is the default `glossary#valueowner` :: cfg.set(name=value) - -The global `setoption()` method of the config objects can set a value with a specific owner - -:: - - cfg.setoption('name', value, 'owner') - - -Finally, the local `setoption()` method directly in the `Option` object can be -used. While the `Option` object refers to his parent, the config knows that the -value has been changed and no bad side effect won't occur - -:: - - >>> booloption = BoolOption('bool', 'Test boolean option', default=True) - >>> descr = OptionDescription('descr', '', [booloption]) - >>> cfg = Config(descr) - >>> booloption.setoption(cfg, False, 'owner') - >>> cfg.bool - >>> False diff --git a/doc/getting-started.txt b/doc/getting-started.txt index 02530aa..81bf1c0 100644 --- a/doc/getting-started.txt +++ b/doc/getting-started.txt @@ -1,5 +1,5 @@ ================================== -`Tiramisu` - getting started +Tiramisu - getting started ================================== What is Configuration handling ? @@ -9,22 +9,19 @@ Due to more and more available configuration options required to set up an operating system, it became quite annoying to hand the necessary options to where they are actually used and even more annoying to add new options. To circumvent these problems the configuration management -was introduced. +was introduced... What is Tiramisu ? =================== -Tiramisu is yet another configuration handler, wich aims at producing -flexible and fast configuration options access. The main advantages are -its access rules and the fact that the configuration 's -consistency is preserved at any time, see :doc:`consistency`. - -There are type and structures's validations for configuration options, -and validations towards the whole configuration. +Tiramisu is yet another configuration handler, wich aims at producing flexible +and fast configuration options access. The main advantages are its access rules +and the fact that the configuration's consistency is preserved at any time, see +:doc:`consistency`. There is of course type and structure validations, but also +validations towards the whole configuration. Last but not least, configuration options can be reached and changed -according to the access rules from nearly everywhere in the OS boxes, -e.g. the containers via the `http/json` server. +according to the access rules from nearly everywhere in your appliance. Just the facts ============== @@ -34,33 +31,45 @@ Just the facts Download --------- -To obtain a copy of the sources, check it out from the repository using -`git`. We suggest using `git` if one wants to access the current development. +To obtain a copy of the sources, check it out from the repository using `git`. +We suggest using `git` if one wants to access the current developments. :: git clone git://git.labs.libre-entreprise.org/tiramisu.git -This will get you a fresh checkout of the code repository in a local -directory named ``tiramisu``. +This will get you a fresh checkout of the code repository in a local directory +named ``tiramisu``. -Understanding Tiramisu's architecture --------------------------------------- +Getting started +------------------- -The `schema` is loaded from an XML file, and the values of -the configuration options are recovered from a `.ini` like file. +Configuration option objects can be created in different ways. Let's perform +very basic :class:`tiramisu.config.Config` object manipulations: -By now, all the in-depth informations about the configuration are stored -in a **single** object, the `config.Config()` object, wich is -responsible of nearly everything. All the necessary options are stored -into a configuration object, which is available nearly everywhere, so -that adding new options becomes trivial. +:: -This `Config()` is available from everywhere with the help of an http server -that serves configuration datas as `json` strings. + >>> from tiramisu.config import Config + >>> from tiramisu.option import OptionDescription, BoolOption + >>> descr = OptionDescription("optgroup", "", [ + ... BoolOption("bool", "", default=False)]) + >>> + >>> config = Config(descr) + >>> # now we have a config, wich contains an option: + >>> config.bool + False + >>> config.bool = True + >>> config.bool + True -.. figure:: architecture.png - The basics of Tiramisu's architecture. - Once loaded, http server serves the `config.Config()` object, that is, - the configuration options and the configuration groups. +So by now, we have + +- a namespace (which is `config` here) +- the access of an option's value by the + attribute access way (here `bool`, wich is a boolean option: + :class:`tiramisu.option.BoolOption()`. + +Configuration option objects :class:`tiramisu.config.Config()` are produced at +the entry points and handed down to where they are actually used. This keeps +configuration local but available everywhere and consistent. diff --git a/doc/glossary.txt b/doc/glossary.txt index b3f9698..1394c8a 100644 --- a/doc/glossary.txt +++ b/doc/glossary.txt @@ -15,7 +15,7 @@ glossary schema option description - see `option.OptionDescription`, see `optionapi#schema` + see `option.OptionDescription`, see `option#schema` The schema of a configuration : diff --git a/doc/index.txt b/doc/index.txt index 004d609..f9fb7de 100644 --- a/doc/index.txt +++ b/doc/index.txt @@ -33,7 +33,7 @@ configuration handler. getting-started config configapi - optionapi + option status consistency glossary diff --git a/doc/option.txt b/doc/option.txt new file mode 100644 index 0000000..1fa4642 --- /dev/null +++ b/doc/option.txt @@ -0,0 +1,115 @@ +.. default-role:: literal + +The `tiramisu.option.Option` options +====================================== + +Description of Options +---------------------- + +All the constructors take a ``name`` and a ``doc`` argument as first +arguments to give the option or option group a name and to document it. +Most constructors take a ``default`` argument that specifies the default +value of the option. If this argument is not supplied the default value +is assumed to be ``None``. + + +.. _optdescr: + +The `OptionDescription` class +------------------------------- + +.. module:: tiramisu.option + +.. autoclass: OptionDescription + + .. automethod:: __init__ + + .. rubric:: Methods + + .. autosummary:: + + ~Config.__init__ + ~Config.set_group_type + + .. automethod:: set_group_type + +`Options description` objects lives in the :class:`tiramisu.config.Config` attribute. + +If you need to access an option object, you can do it with the OptionDescription +object. Not only the value of the option by attribute access, but the option +object itself that lives behind the scene. It can always be accessed internally +with the `_cfgimpl_descr` attribute of the `config` objects. For example, with a +option named `name` in a `gc` group the `name` object can be accessed like +this:: + + conf._cfgimpl_descr.name + +of sub configs with :: + + conf.gc._cfgimpl_descr.name + +This is a binding. The option objects are in the `_children` config's attribute. + +Why accessing an option object ? It is possible for example freeze the +configuration option + +:: + + conf.gc._cfgimpl_descr.dummy.freeze() + +or to hide it, or disable it, or... anything. + +The `Option` base class +------------------------- + +It's the abstract base class for almost all options (except the symblink). + +.. _optioninit: + +.. autoclass:: Option + :special-members: + :members: + +All option types +------------------ + +.. autoclass:: BoolOption + :private-members: + +.. autoclass:: IntOption + :private-members: + +.. autoclass:: FloatOption + :private-members: + +.. autoclass:: StrOption + :private-members: + + +.. autoclass:: SymLinkOption + + .. automethod:: __init__ + + +``SymLinkOption`` redirects to another configuration option in the +configuration, that is : + +- retrieves the value of the target, +- can set the value of the target too + + +.. autoclass:: IPOption + +.. autoclass:: NetmaskOption + +.. autoclass:: NetworkOption + +.. autoclass:: DomainnameOption + + +.. autoclass:: ChoiceOption + + .. automethod:: __init__ + + + diff --git a/doc/optionapi.txt b/doc/optionapi.txt deleted file mode 100644 index 6c5a190..0000000 --- a/doc/optionapi.txt +++ /dev/null @@ -1,141 +0,0 @@ -.. default-role:: literal - -The `tiramisu.option.Option` options -====================================== - -Description of Options ----------------------- - -All the constructors take a ``name`` and a ``doc`` argument as first -arguments to give the option or option group a name and to document it. -Most constructors take a ``default`` argument that specifies the default -value of the option. If this argument is not supplied the default value -is assumed to be ``None``. - - -.. _optdescr: - -The `OptionDescription` class -------------------------------- - -This class is used to group suboptions. - -.. module:: tiramisu.option - -.. autoclass: OptionDescription - - .. automethod:: __init__ - - .. rubric:: Methods - - .. autosummary:: - - ~Config.__init__ - ~Config.set_group_type - - .. automethod:: set_group_type - -.. - - - ``__init__(self, name, doc, children)`` - ``children`` is a list of option descriptions (including - ``OptionDescription`` instances for nested namespaces). - - ``set_group_type(self, group_name)`` - Three available group_types : `default`, `family`, `group` and - `master` (for master~slave group type). Notice that for a - master~slave group, the name of the group and the name of the - master option are identical. - -`Options description` objects lives in the `_cfgimpl_descr` config attribute. - -If you need to access an option object, you can do it with the OptionDescription -object. Not only the value of the option by attribute access, but the option -object itself that lives behind the scene. It can always be accessed internally -with the `_cfgimpl_descr` attribute of the `config` objects. For example, with a -option named `name` in a `gc` group the `name` object can be accessed like -this:: - - conf._cfgimpl_descr.name - -of sub configs with :: - - conf.gc._cfgimpl_descr.name - -This is a binding. The option objects are in the `_children` config's attribute. - -Why accessing an option object ? It is possible for example freeze the -configuration option - -:: - - conf.gc._cfgimpl_descr.dummy.freeze() - -or to hide it, or disable it, or... anything. - -The `Option` class ---------------------- - -It's an abstract base class for option wich are typed (int, string...) - -.. _optioninit: - -.. autoclass:: Option - :special-members: - :members: - -generic option ``__init__`` method: - - ``__init__(name, doc, default=None, requires=None, multi=False, mandatory=False)`` - -``BoolOption`` -++++++++++++++ - -Represents a choice between ``True`` and ``False``. - -``IntOption`` -+++++++++++++ - -Represents a choice of an integer. - -``FloatOption`` -+++++++++++++++ - -Represents a choice of a floating point number. - -``StrOption`` -+++++++++++++ - -Represents the choice of a string. - -``SymLinkOption`` -++++++++++++++++++ - -Redirects to another configuration option in the configuration, that is : - -- retrieves the value of the tagert, -- can set the value of the target too. - - ``__init__(self, name, path)`` - - `path` is the path to the target, the option - -``IPOption`` -+++++++++++++ - -Represents the choice of an ip. - -``NetmaskOption`` -+++++++++++++++++++ - -Represents the choice of a netmask. - -``ChoiceOption`` -++++++++++++++++ - -Represents a choice out of several objects. The option can also have the value -``None``. - - ``__init__(self, name, doc, values, default=None, requires=None)`` - ``values`` is a list of values the option can possibly take. diff --git a/tiramisu/error.py b/tiramisu/error.py index 7f58f6d..8dc5dc2 100644 --- a/tiramisu/error.py +++ b/tiramisu/error.py @@ -20,42 +20,35 @@ # the whole pypy projet is under MIT licence # ____________________________________________________________ -#ValueError if function's parameter not correct -# or if not logical -# or if validation failled -# or multi must be a list -# or error in autolib -#TypeError if parameter has no good type -#AttributeError if no option or optiondescription in optiondescription (also when specified a path) - - -#____________option___________ +# Exceptions for an Option class PropertiesOptionError(AttributeError): - "try to access to opt with not allowed property" + "attempt to access to an option with a property that is'nt allowed" def __init__(self, msg, proptype): self.proptype = proptype super(PropertiesOptionError, self).__init__(msg) -#____________config___________ +#____________________________________________________________ +# Exceptions for a Config class ConfigError(StandardError): - """try to change owner for an option without value - or if _cfgimpl_descr is None - or if error in calculation""" + """attempt to change an option's owner without a value + or in case of `_cfgimpl_descr` is None + or if a calculation cannot be carried out""" pass class ConflictError(StandardError): - "duplicate config" + "duplicate options are present in a single config" pass -#____________other___________ +#____________________________________________________________ +# miscellaneous exceptions class RequirementRecursionError(StandardError): - "recursive error" + "a recursive loop occurs in the requirements tree" pass class SlaveError(StandardError): - "problem with slave's length" + "problem with a slave's value length" pass diff --git a/tiramisu/option.py b/tiramisu/option.py index ad56a75..2c0392b 100644 --- a/tiramisu/option.py +++ b/tiramisu/option.py @@ -348,6 +348,11 @@ class Option(BaseInformation): class ChoiceOption(Option): + """Represents a choice out of several objects. + + The option can also have the value ``None`` + """ + __slots__ = ('_values', '_open_values', '_opt_type') _opt_type = 'string' @@ -355,6 +360,9 @@ class ChoiceOption(Option): requires=None, multi=False, callback=None, callback_params=None, open_values=False, validator=None, validator_args=None, properties=()): + """ + :param values: is a list of values the option can possibly take + """ if not isinstance(values, tuple): raise TypeError(_('values must be a tuple for {0}').format(name)) self._values = values @@ -386,6 +394,7 @@ class ChoiceOption(Option): class BoolOption(Option): + "Represents a choice between ``True`` and ``False``" __slots__ = ('_opt_type',) _opt_type = 'bool' @@ -394,6 +403,7 @@ class BoolOption(Option): class IntOption(Option): + "Represents a choice of an integer" __slots__ = ('_opt_type',) _opt_type = 'int' @@ -402,6 +412,7 @@ class IntOption(Option): class FloatOption(Option): + "Represents a choice of a floating point number" __slots__ = ('_opt_type',) _opt_type = 'float' @@ -410,6 +421,7 @@ class FloatOption(Option): class StrOption(Option): + "Represents the choice of a string" __slots__ = ('_opt_type',) _opt_type = 'string' @@ -418,6 +430,7 @@ class StrOption(Option): class UnicodeOption(Option): + "Represents the choice of a unicode string" __slots__ = ('_opt_type',) _opt_type = 'unicode' _empty = u'' @@ -446,6 +459,7 @@ class SymLinkOption(object): class IPOption(Option): + "Represents the choice of an ip" __slots__ = ('_opt_type', '_only_private') _opt_type = 'ip' @@ -475,6 +489,7 @@ class IPOption(Option): class NetworkOption(Option): + "Represents the choice of a network" __slots__ = ('_opt_type',) _opt_type = 'network' @@ -487,6 +502,7 @@ class NetworkOption(Option): class NetmaskOption(Option): + "Represents the choice of a netmask" __slots__ = ('_opt_type',) _opt_type = 'netmask'