# Authors: # Jason Gerard DeRose # # Copyright (C) 2008 Red Hat # see file 'COPYING' for use and warranty information # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . ''' Package containing the core library. ============================= Tutorial for Plugin Authors ============================= This tutorial will introduce you to writing plugins for freeIPA v2. It does not cover every detail, but it provides enough to get you started and is heavily cross-referenced with further documentation that (hopefully) fills in the missing details. In addition to this tutorial, the many built-in plugins in `ipalib.plugins` and `ipaserver.plugins` provide real-life examples of how to write good plugins. ---------------------------- How this tutorial is written ---------------------------- The code examples in this tutorial are presented as if entered into a Python interactive interpreter session. As such, when you create a real plugin in a source file, a few details will be different (in addition to the fact that you will never include the ``>>>`` nor ``...`` that the interpreter places at the beginning of each line of code). The tutorial examples all have this pattern: :: >>> from ipalib import Command, create_api >>> api = create_api() >>> class my_command(Command): ... pass ... >>> api.register(my_command) >>> api.finalize() In the tutorial we call `create_api()` to create an *example* instance of `plugable.API` to work with. But a real plugin will simply use ``ipalib.api``, the standard run-time instance of `plugable.API`. A real plugin will have this pattern: :: from ipalib import Command, api class my_command(Command): pass api.register(my_command) As seen above, also note that in a real plugin you will *not* call `plugable.API.finalize()`. When in doubt, look at some of the built-in plugins for guidance, like those in `ipalib.plugins`. If you don't know what the Python *interactive interpreter* is, or are confused about what this *Python* is in the first place, then you probably should start with the Python tutorial: http://docs.python.org/tutorial/index.html ------------------------------------ First steps: A simple command plugin ------------------------------------ Our first example will create the most basic command plugin possible. This command will be seen in the list of command plugins, but it wont be capable of actually doing anything yet. A command plugin simultaneously adds a new command that can be called through the command-line ``ipa`` script *and* adds a new XML-RPC method... the two are one in the same, simply invoked in different ways. A freeIPA plugin is a Python class, and when you create a plugin, you register this class itself (instead of an instance of the class). To be a command plugin, your plugin must subclass from `frontend.Command` (or from a subclass thereof). Here is our first example: >>> from ipalib import Command, create_api >>> api = create_api() >>> class my_command(Command): # Step 1, define class ... """My example plugin.""" ... >>> api.register(my_command) # Step 2, register class Notice that we are registering the ``my_command`` class itself, not an instance of ``my_command``. Until `plugable.API.finalize()` is called, your plugin class has not been instantiated nor does the ``Command`` namespace yet exist. For example: >>> hasattr(api, 'Command') False >>> api.finalize() # plugable.API.finalize() >>> hasattr(api.Command, 'my_command') True >>> api.Command.my_command.doc Gettext('My example plugin.', domain='ipa', localedir=None) Notice that your plugin instance is accessed through an attribute named ``my_command``, the same name as your plugin class name. ------------------------------ Make your command do something ------------------------------ This simplest way to make your example command plugin do something is to implement a ``run()`` method, like this: >>> class my_command(Command): ... """My example plugin with run().""" ... ... def run(self): ... return dict(result='My run() method was called!') ... >>> api = create_api() >>> api.register(my_command) >>> api.finalize() >>> api.Command.my_command() # Call your command {'result': 'My run() method was called!'} When `frontend.Command.__call__()` is called, it first validates any arguments and options your command plugin takes (if any) and then calls its ``run()`` method. ------------------------ Forwarding vs. execution ------------------------ However, unlike the example above, a typical command plugin will implement an ``execute()`` method instead of a ``run()`` method. Your command plugin can be loaded in two distinct contexts: 1. In a *client* context - Your command plugin is only used to validate any arguments and options it takes, and then ``self.forward()`` is called, which forwards the call over XML-RPC to an IPA server where the actual work is done. 2. In a *server* context - Your same command plugin validates any arguments and options it takes, and then ``self.execute()`` is called, which you should implement to perform whatever work your plugin does. The base `frontend.Command.run()` method simply dispatches the call to ``self.execute()`` if ``self.env.in_server`` is True, or otherwise dispatches the call to ``self.forward()``. For example, say you have a command plugin like this: >>> class my_command(Command): ... """Forwarding vs. execution.""" ... ... def forward(self): ... return dict( ... result='forward(): in_server=%r' % self.env.in_server ... ) ... ... def execute(self): ... return dict( ... result='execute(): in_server=%r' % self.env.in_server ... ) ... If ``my_command`` is loaded in a *client* context, ``forward()`` will be called: >>> api = create_api() >>> api.env.in_server = False # run() will dispatch to forward() >>> api.register(my_command) >>> api.finalize() >>> api.Command.my_command() # Call your command plugin {'result': 'forward(): in_server=False'} On the other hand, if ``my_command`` is loaded in a *server* context, ``execute()`` will be called: >>> api = create_api() >>> api.env.in_server = True # run() will dispatch to execute() >>> api.register(my_command) >>> api.finalize() >>> api.Command.my_command() # Call your command plugin {'result': 'execute(): in_server=True'} Normally there should be no reason to override `frontend.Command.forward()`, but, as above, it can be done for demonstration purposes. In contrast, there *is* a reason you might want to override `frontend.Command.run()`: if it only makes sense to execute your command locally, if it should never be forwarded to the server. In this case, you should implement your *do-stuff* in the ``run()`` method instead of in the ``execute()`` method. For example, the ``ipa`` command line script has a ``help`` command (`ipalib.cli.help`) that is specific to the command-line-interface and should never be forwarded to the server. --------------- Backend plugins --------------- There are two types of plugins: 1. *Frontend plugins* - These are loaded in both the *client* and *server* contexts. These need to be installed with any application built atop the `ipalib` library. The built-in frontend plugins can be found in `ipalib.plugins`. The ``my_command`` example above is a frontend plugin. 2. *Backend plugins* - These are only loaded in a *server* context and only need to be installed on the IPA server. The built-in backend plugins can be found in `ipaserver.plugins`. Backend plugins should provide a set of methods that standardize how IPA interacts with some external system or library. For example, all interaction with LDAP is done through the ``ldap`` backend plugin defined in `ipaserver.plugins.b_ldap`. As a good rule of thumb, anytime you need to import some package that is not part of the Python standard library, you should probably interact with that package via a corresponding backend plugin you implement. Backend plugins are much more free-form than command plugins. Aside from a few reserved attribute names, you can define arbitrary public methods on your backend plugin. Here is a simple example: >>> from ipalib import Backend >>> class my_backend(Backend): ... """My example backend plugin.""" ... ... def do_stuff(self): ... """Part of your API.""" ... return 'Stuff got done.' ... >>> api = create_api() >>> api.register(my_backend) >>> api.finalize() >>> api.Backend.my_backend.do_stuff() 'Stuff got done.' ------------------------------- How your command should do work ------------------------------- We now return to our ``my_command`` plugin example. Plugins are separated into frontend and backend plugins so that there are not unnecessary dependencies required by an application that only uses `ipalib` and its built-in frontend plugins (and then forwards over XML-RPC for execution). But how do we avoid introducing additional dependencies? For example, the ``user_add`` command needs to talk to LDAP to add the user, yet we want to somehow load the ``user_add`` plugin on client machines without requiring the ``python-ldap`` package (Python bindings to openldap) to be installed. To answer that, we consult our golden rule: **The golden rule:** A command plugin should implement its ``execute()`` method strictly via calls to methods on one or more backend plugins. So the module containing the ``user_add`` command does not itself import the Python LDAP bindings, only the module containing the ``ldap`` backend plugin does that, and the backend plugins are only installed on the server. The ``user_add.execute()`` method, which is only called when in a server context, is implemented as a series of calls to methods on the ``ldap`` backend plugin. When `plugable.Plugin.set_api()` is called, each plugin stores a reference to the `plugable.API` instance it has been loaded into. So your plugin can access the ``my_backend`` plugin as ``self.api.Backend.my_backend``. Additionally, convenience attributes are set for each namespace, so your plugin can also access the ``my_backend`` plugin as simply ``self.Backend.my_backend``. This next example will tie everything together. First we create our backend plugin: >>> api = create_api() >>> api.env.in_server = True # We want to execute, not forward >>> class my_backend(Backend): ... """My example backend plugin.""" ... ... def do_stuff(self): ... """my_command.execute() calls this.""" ... return 'my_backend.do_stuff() indeed did do stuff!' ... >>> api.register(my_backend) Second, we have our frontend plugin, the command: >>> class my_command(Command): ... """My example command plugin.""" ... ... def execute(self): ... """Implemented against Backend.my_backend""" ... return dict(result=self.Backend.my_backend.do_stuff()) ... >>> api.register(my_command) Lastly, we call ``api.finalize()`` and see what happens when we call ``my_command()``: >>> api.finalize() >>> api.Command.my_command() {'result': 'my_backend.do_stuff() indeed did do stuff!'} When not in a server context, ``my_command.execute()`` never gets called, so it never tries to access the non-existent backend plugin at ``self.Backend.my_backend.`` To emphasize this point, here is one last example: >>> api = create_api() >>> api.env.in_server = False # We want to forward, not execute >>> class my_command(Command): ... """My example command plugin.""" ... ... def execute(self): ... """Same as above.""" ... return dict(result=self.Backend.my_backend.do_stuff()) ... ... def forward(self): ... return dict(result='Just my_command.forward() getting called here.') ... >>> api.register(my_command) >>> api.finalize() Notice that the ``my_backend`` plugin has certainly not be registered: >>> hasattr(api.Backend, 'my_backend') False And yet we can call ``my_command()``: >>> api.Command.my_command() {'result': 'Just my_command.forward() getting called here.'} ---------------------------------------- Calling other commands from your command ---------------------------------------- It can be useful to have your ``execute()`` method call other command plugins. Among other things, this allows for meta-commands that conveniently call several other commands in a single operation. For example: >>> api = create_api() >>> api.env.in_server = True # We want to execute, not forward >>> class meta_command(Command): ... """My meta-command plugin.""" ... ... def execute(self): ... """Calls command_1(), command_2()""" ... msg = '%s; %s.' % ( ... self.Command.command_1()['result'], ... self.Command.command_2()['result'], ... ) ... return dict(result=msg) >>> class command_1(Command): ... def execute(self): ... return dict(result='command_1.execute() called') ... >>> class command_2(Command): ... def execute(self): ... return dict(result='command_2.execute() called') ... >>> api.register(meta_command) >>> api.register(command_1) >>> api.register(command_2) >>> api.finalize() >>> api.Command.meta_command() {'result': 'command_1.execute() called; command_2.execute() called.'} Because this is quite useful, we are going to revise our golden rule somewhat: **The revised golden rule:** A command plugin should implement its ``execute()`` method strictly via what it can access through ``self.api``, most likely via the backend plugins in ``self.api.Backend`` (which can also be conveniently accessed as ``self.Backend``). ----------------------------------------------- Defining arguments and options for your command ----------------------------------------------- You can define a command that will accept specific arguments and options. For example: >>> from ipalib import Str >>> class nudge(Command): ... """Takes one argument, one option""" ... ... takes_args = ('programmer',) ... ... takes_options = (Str('stuff', default=u'documentation')) ... ... def execute(self, programmer, **kw): ... return dict( ... result='%s, go write more %s!' % (programmer, kw['stuff']) ... ) ... >>> api = create_api() >>> api.env.in_server = True >>> api.register(nudge) >>> api.finalize() >>> api.Command.nudge(u'Jason') {'result': u'Jason, go write more documentation!'} >>> api.Command.nudge(u'Jason', stuff=u'unit tests') {'result': u'Jason, go write more unit tests!'} The ``args`` and ``options`` attributes are `plugable.NameSpace` instances containing a command's arguments and options, respectively, as you can see: >>> list(api.Command.nudge.args) # Iterates through argument names ['programmer'] >>> api.Command.nudge.args.programmer Str('programmer') >>> list(api.Command.nudge.options) # Iterates through option names ['stuff'] >>> api.Command.nudge.options.stuff Str('stuff', default=u'documentation') >>> api.Command.nudge.options.stuff.default u'documentation' The arguments and options must not contain colliding names. They are both merged together into the ``params`` attribute, another `plugable.NameSpace` instance, as you can see: >>> api.Command.nudge.params NameSpace(<2 members>, sort=False) >>> list(api.Command.nudge.params) # Iterates through the param names ['programmer', 'stuff'] When calling a command, its positional arguments can also be provided as keyword arguments, and in any order. For example: >>> api.Command.nudge(stuff=u'lines of code', programmer=u'Jason') {'result': u'Jason, go write more lines of code!'} When a command plugin is called, the values supplied for its parameters are put through a sophisticated processing pipeline that includes steps for normalization, type conversion, validation, and dynamically constructing the defaults for missing values. The details wont be covered here; however, here is a quick teaser: >>> from ipalib import Int >>> class create_player(Command): ... takes_options = ( ... 'first', ... 'last', ... Str('nick', ... normalizer=lambda value: value.lower(), ... default_from=lambda first, last: first[0] + last, ... ), ... Int('points', default=0), ... ) ... >>> cp = create_player() >>> cp.finalize() >>> cp.convert(points=u' 1000 ') {'points': 1000} >>> cp.normalize(nick=u'NickName') {'nick': u'nickname'} >>> cp.get_default(first=u'Jason', last=u'DeRose') {'nick': u'jderose', 'points': 0} For the full details on the parameter system, see the `frontend.parse_param_spec()` function, and the `frontend.Param` and `frontend.Command` classes. --------------------------------------- Allowed return values from your command --------------------------------------- The return values from your command can be rendered by different user interfaces (CLI, web-UI); furthermore, a call to your command can be transparently forwarded over the network (XML-RPC, JSON). As such, the return values from your command must be usable by the least common denominator. Your command should return only simple data types and simple data structures, the kinds that can be represented in an XML-RPC request or in the JSON format. The return values from your command's ``execute()`` method can include only the following: Simple scalar values: These can be ``str``, ``unicode``, ``int``, and ``float`` instances, plus the ``True``, ``False``, and ``None`` constants. Simple compound values: These can be ``dict``, ``list``, and ``tuple`` instances. These compound values must contain only the simple scalar values above or other simple compound values. These compound values can also be empty. For our purposes here, the ``list`` and ``tuple`` types are equivalent and can be used interchangeably. Also note that your ``execute()`` method should not contain any ``print`` statements or otherwise cause any output on ``sys.stdout``. Your command can (and should) produce log messages by using ``self.log`` (see below). To learn more about XML-RPC (XML Remote Procedure Call), see: http://docs.python.org/library/xmlrpclib.html http://en.wikipedia.org/wiki/XML-RPC To learn more about JSON (Java Script Object Notation), see: http://docs.python.org/library/json.html http://www.json.org/ --------------------------------------- How your command should print to stdout --------------------------------------- As noted above, your command should not print anything while in its ``execute()`` method. So how does your command format its output when called from the ``ipa`` script? After the `cli.CLI.run_cmd()` method calls your command, it will call your command's ``output_for_cli()`` method (if you have implemented one). If you implement an ``output_for_cli()`` method, it must have the following signature: :: output_for_cli(textui, result, *args, **options) textui An object implementing methods for outputting to the console. Currently the `ipalib.cli.textui` plugin is passed, which your method can also access as ``self.Backend.textui``. However, in case this changes in the future, your method should use the instance passed to it in this first argument. result This is the return value from calling your command plugin. Depending upon how your command is implemented, this is probably the return value from your ``execute()`` method. args The arguments your command was called with. If your command takes no arguments, you can omit this. You can also explicitly list your arguments rather than using the generic ``*args`` form. options The options your command was called with. If your command takes no options, you can omit this. If your command takes any options, you must use the ``**options`` form as they will be provided strictly as keyword arguments. For example, say we setup a command like this: >>> class show_items(Command): ... ... takes_args = ('key?',) ... ... takes_options = (Flag('reverse'),) ... ... def execute(self, key, **options): ... items = dict( ... fruit=u'apple', ... pet=u'dog', ... city=u'Berlin', ... ) ... if key in items: ... return dict(result=items[key]) ... items = [ ... (k, items[k]) for k in sorted(items, reverse=options['reverse']) ... ] ... return dict(result=items) ... ... def output_for_cli(self, textui, result, key, **options): ... result = result['result'] ... if key is not None: ... textui.print_plain('%s = %r' % (key, result)) ... else: ... textui.print_name(self.name) ... textui.print_keyval(result) ... format = '%d items' ... if options['reverse']: ... format += ' (in reverse order)' ... textui.print_count(result, format) ... >>> api = create_api() >>> api.bootstrap(in_server=True) # We want to execute, not forward >>> api.register(show_items) >>> api.finalize() Normally when you invoke the ``ipa`` script, `cli.CLI.load_plugins()` will register the `cli.textui` backend plugin, but for the sake of our example, we will just create an instance here: >>> from ipalib import cli >>> textui = cli.textui() # We'll pass this to output_for_cli() Now for what we are concerned with in this example, calling your command through the ``ipa`` script basically will do the following: >>> result = api.Command.show_items() >>> api.Command.show_items.output_for_cli(textui, result, None, reverse=False) ----------- show-items: ----------- city = u'Berlin' fruit = u'apple' pet = u'dog' ------- 3 items ------- Similarly, calling it with ``reverse=True`` would result in the following: >>> result = api.Command.show_items(reverse=True) >>> api.Command.show_items.output_for_cli(textui, result, None, reverse=True) ----------- show-items: ----------- pet = u'dog' fruit = u'apple' city = u'Berlin' -------------------------- 3 items (in reverse order) -------------------------- Lastly, providing a ``key`` would result in the following: >>> result = api.Command.show_items(u'city') >>> api.Command.show_items.output_for_cli(textui, result, 'city', reverse=False) city = u'Berlin' See the `ipalib.cli.textui` plugin for a description of its methods. ------------------------ Logging from your plugin ------------------------ After `plugable.Plugin.set_api()` is called, your plugin will have a ``self.log`` attribute. Plugins should only log through this attribute. For example: >>> class paint_house(Command): ... ... takes_args = 'color' ... ... def execute(self, color): ... """Uses self.log.error()""" ... if color not in ('red', 'blue', 'green'): ... self.log.error("I don't have %s paint!", color) # Log error ... return ... return 'I painted the house %s.' % color ... Some basic knowledge of the Python ``logging`` module might be helpful. See: http://docs.python.org/library/logging.html The important thing to remember is that your plugin should not configure logging itself, but should instead simply use the ``self.log`` logger. Also see the `plugable.API.bootstrap()` method for details on how the logging is configured. --------------------- Environment variables --------------------- Plugins access configuration variables and run-time information through ``self.api.env`` (or for convenience, ``self.env`` is equivalent). This attribute is a refences to the `ipalib.config.Env` instance created in `plugable.API.__init__()`. After `API.bootstrap()` has been called, the `Env` instance will be populated with all the environment information used by the built-in plugins. This will be called before any plugins are registered, so plugin authors can assume these variables will all exist by the time the module containing their plugin (or plugins) is imported. `Env._bootstrap()`, which is called by `API.bootstrap()`, will create several run-time variables that connot be overriden in configuration files or through command-line options. Here is an overview of this run-time information: ============= ============================= ======================= Key Example value Description ============= ============================= ======================= bin '/usr/bin' Dir. containing script dot_ipa '/home/jderose/.ipa' User config directory home os.environ['HOME'] User home dir. ipalib '.../site-packages/ipalib' Dir. of ipalib package mode 'unit_test' The mode ipalib is in script sys.argv[0] Path of script site_packages '.../python2.5/site-packages' Dir. containing ipalib/ ============= ============================= ======================= If your plugin requires new environment variables *and* will be included in the freeIPA built-in plugins, you should add the defaults for your variables in `ipalib.constants.DEFAULT_CONFIG`. Also, you should consider whether your new environment variables should have any auto-magic logic to determine their values if they haven't already been set by the time `config.Env._bootstrap()`, `config.Env._finalize_core()`, or `config.Env._finalize()` is called. On the other hand, if your plugin requires new environment variables and will be installed in a 3rd-party package, your plugin should set these variables in the module it is defined in. `config.Env` values work on a first-one-wins basis... after a value has been set, it can not be overridden with a new value. As any variables can be set using the command-line ``-e`` global option or set in a configuration file, your module must check whether a variable has already been set before setting its default value. For example: >>> if 'message_of_the_day' not in api.env: ... api.env.message_of_the_day = 'Hello, world!' ... Your plugin can access any environment variables via ``self.env``. For example: >>> class motd(Command): ... """Print message of the day.""" ... ... def execute(self): ... return dict(result=self.env.message) ... >>> api = create_api() >>> api.bootstrap(in_server=True, message='Hello, world!') >>> api.register(motd) >>> api.finalize() >>> api.Command.motd() {'result': u'Hello, world!'} Also see the `plugable.API.bootstrap_with_global_options()` method. --------------------------------------------- Indispensable ipa script commands and options --------------------------------------------- The ``console`` command will launch a custom interactive Python interpreter session. The global environment will have an ``api`` variable, which is the standard `plugable.API` instance found at ``ipalib.api``. All plugins will have been loaded (well, except the backend plugins if ``in_server`` is False) and ``api`` will be fully initialized. To launch the console from within the top-level directory in the the source tree, just run ``ipa console`` from a terminal, like this: :: $ ./ipa console By default, ``in_server`` is False. If you want to start the console in a server context (so that all the backend plugins are loaded), you can use the ``-e`` option to set the ``in_server`` environment variable, like this: :: $ ./ipa -e in_server=True console You can specify multiple environment variables by including the ``-e`` option multiple times, like this: :: $ ./ipa -e in_server=True -e mode=dummy console The space after the ``-e`` is optional. This is equivalent to the above command: :: $ ./ipa -ein_server=True -emode=dummy console The ``env`` command will print out the full environment in key=value pairs, like this: :: $ ./ipa env If you use the ``--server`` option, it will forward the call to the server over XML-RPC and print out what the environment is on the server, like this: :: $ ./ipa env --server The ``plugins`` command will show details of all the plugin that are loaded, like this: :: $ ./ipa plugins ----------------------------------- Learning more about freeIPA plugins ----------------------------------- To learn more about writing freeIPA plugins, you should: 1. Look at some of the built-in plugins, like the frontend plugins in `ipalib.plugins.f_user` and the backend plugins in `ipaserver.plugins.b_ldap`. 2. Learn about the base classes for frontend plugins in `ipalib.frontend`. 3. Learn about the core plugin framework in `ipalib.plugable`. Furthermore, the freeIPA plugin architecture was inspired by the Bazaar plugin architecture. Although the two are different enough that learning how to write plugins for Bazaar will not particularly help you write plugins for freeIPA, some might be interested in the documentation on writing plugins for Bazaar, available here: http://bazaar-vcs.org/WritingPlugins If nothing else, we just want to give credit where credit is deserved! However, freeIPA does not use any *code* from Bazaar... it merely borrows a little inspiration. -------------------------- A note on docstring markup -------------------------- Lastly, a quick note on markup: All the Python docstrings in freeIPA v2 (including this tutorial) use the *reStructuredText* markup language. For information on reStructuredText, see: http://docutils.sourceforge.net/rst.html For information on using reStructuredText markup with epydoc, see: http://epydoc.sourceforge.net/manual-othermarkup.html -------------------------------------------------- Next steps: get involved with freeIPA development! -------------------------------------------------- The freeIPA team is always interested in feedback and contribution from the community. To get involved with freeIPA, see the *Contribute* page on freeIPA.org: http://freeipa.org/page/Contribute ''' import os import plugable from backend import Backend from frontend import Command, LocalOrRemote from frontend import Object, Method, Property from crud import Create, Retrieve, Update, Delete, Search from parameters import DefaultFrom, Bool, Flag, Int, Float, Bytes, Str, IA5Str, Password,List from parameters import BytesEnum, StrEnum, AccessTime, File from errors import SkipPluginModule from text import _, ngettext, GettextFactory, NGettextFactory version_info = (2, 0, 0, 'alpha', 0) if version_info[3] == 'final': __version__ = '%d.%d.%d' % version_info[:3] else: __version__ = '%d.%d.%d.%s.%d' % version_info def create_api(mode='dummy'): """ Return standard `plugable.API` instance. This standard instance allows plugins that subclass from the following base classes: - `frontend.Command` - `frontend.Object` - `frontend.Method` - `frontend.Property` - `backend.Backend` """ api = plugable.API(Command, Object, Method, Property, Backend) if mode is not None: api.env.mode = mode assert mode != 'production' return api api = create_api(mode=None) if os.environ.get('IPA_UNIT_TEST_MODE', None) == 'cli_test': api.bootstrap(context='cli', in_server=False, in_tree=True) api.finalize()