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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
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<meta name="generator" content="pdoc 0.10.0" />
<title>pandare.pypluginmanager API documentation</title>
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<article id="content">
<header>
<h1 class="title">Module <code>pandare.pypluginmanager</code></h1>
</header>
<section id="section-intro">
<p>Class to manage loading Panda PyPlugins. See docs/pyplugins.md for details.</p>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">#!/usr/bin/env python3
"""
Class to manage loading Panda PyPlugins. See docs/pyplugins.md for details.
"""
from pathlib import Path
from pandare import PyPlugin
import inspect
import importlib.util
class _DotGetter(object):
'''
Simple class to provide access to fields via attribute (dot) looukups
'''
def __init__(self, data=None):
if data is None:
data = {}
self.data = data
def set(self, k, v):
self.data[k] = v
def __str__(self):
return str(list(self.data.keys()))
def __getattr__(self, name):
raise NotImplementedError("Subclass must implement this virtual method")
class _PppFuncs(_DotGetter):
def __enter__(self):
self.data['__enter__']()
return self
def __exit__(self, *exc):
return self.data['__exit__'](*exc)
def __getattr__(self, name):
method = self.data.get(name, None)
if method is None:
raise AttributeError(f"No method {name}: available options are {self}")
return lambda *args, **kwargs: method(*args, **kwargs)
class _PppPlugins(_DotGetter):
def __getattr__(self, name):
plugin = self.data.get(name, None)
if plugin is None:
raise AttributeError(f"No plugin named {name}")
return plugin
def add(self, plugin_name, func_name, func):
# Create _PppFuncs for plugin_name if necessary
# store func_name = func in _PppFuncs[plugin_name]
plugin = self.data.get(plugin_name, None)
if not plugin:
self.set(plugin_name, _PppFuncs())
plugin = self.data.get(plugin_name, None)
# If the function is a context manager, store the original method
if func_name in ("__enter__", "__exit__") and hasattr(func, "__original_method"):
plugin.set(func_name, func.__original_method)
else:
plugin.set(func_name, func)
class PyPluginManager:
def __init__(self, panda, flask=False, host='127.0.0.1', port=8080, silence_warning=False):
'''
Set up an instance of PyPluginManager.
'''
self.panda = panda
self.plugins = {}
self.silence_warning = silence_warning
self._ppp_plugins = _PppPlugins()
self.flask = flask
self.port = None
self.host = None
self.app = None
self.blueprint = None
self.flask_thread = None
if self.flask:
self.enable_flask(host, port)
@property
def ppp(self):
return self._ppp_plugins
def get_ppp_funcs(self, plugin):
# iterate over each attribute in the class `plugin`
for item_name in dir(plugin):
item = getattr(plugin, item_name)
# check if the class attribute has a field called `__is_pyplugin_ppp`
#print("CHECK:", item, hasattr(item, "__is_pyplugin_ppp"))
if hasattr(item, "_PyPlugin__is_pyplugin_ppp") and getattr(item, "_PyPlugin__is_pyplugin_ppp"):
self.ppp.add(plugin.__class__.__name__, item.__name__, item)
def enable_flask(self, host='127.0.0.1', port=8080):
'''
Enable flask mode for this instance of the PyPlugin manager. Registered PyPlugins
which support flask will be made available at the web interfaces.
'''
if len(self.plugins) and not self.silence_warning:
print("WARNING: You've previously registered some PyPlugins prior to enabling flask")
print(f"Plugin(s) {self.plugins.keys()} will be unable to use flask")
from flask import Flask, Blueprint
self.flask = True
self.app = Flask(__name__)
self.blueprint = Blueprint
self.host = host
self.port = port
def load_plugin_class(self, plugin_file, class_names):
'''
For backwards compatability with PyPlugins which subclass
PyPlugin without importing it.
Given a path to a python file which has a class that subclasses
PyPlugin, set up the imports correctly such that we can
generate an uninstantiated instance of that class and return
that object.
Note you can also just add `from pandare import PyPlugin` to
the plugin file and then just import the class(es) you want and pass them
directly to panda.pyplugins.register()
This avoids the `NameError: name 'PyPlugin' is not defined` which
you would get from directly doing `import [class_name] from [plugin_file]`
'''
spec = importlib.util.spec_from_file_location(plugin_file.split("/")[-1], plugin_file)
if spec is None:
raise ValueError(f"Unable to resolve plugin {plugin_file}")
plugin = importlib.util.module_from_spec(spec)
plugin.PyPlugin = PyPlugin
spec.loader.exec_module(plugin)
classes = []
success = False
for class_name in class_names:
if not hasattr(plugin, class_name):
continue
cls = getattr(plugin, class_name)
assert issubclass(cls, PyPlugin), f"Class {class_name} does not subclass PyPlugin"
classes.append(cls)
success = True
if not success:
print(f"Warning: {plugin_file} does not contain any of the requested classes {class_names}")
return classes
def load(self, pluginclasses, args=None, template_dir=None):
'''
Load (aka register) a PyPANDA plugin to run. It can later be unloaded
by using panda.pyplugins.unload(name).
pluginclasses can either be an uninstantiated python class, a list of such classes,
or a tuple of (path_to_module.py, [classnames]) where classnames is a list of
clases subclasses which subclass PyPlugin.
Each plugin class will be stored in self.plugins under the class name
'''
if args is None:
args = {}
pluginpath = None
if isinstance(pluginclasses, tuple):
# Tuple: use self.load_plugin_class to load the requested classes from
# the provided file
pluginpath, clsnames = pluginclasses
pluginclasses = self.load_plugin_class(pluginpath, clsnames)
elif not isinstance(pluginclasses, list):
# Single element: make it a list with one item
pluginclasses = [pluginclasses]
# This is a little tricky - we can't just instantiate
# an instance of the object- it may use self.get_arg
# in its init method. To allow this behavior, we create
# the object, use the __preinit__ function defined above
# and then ultimately call the __init__ method
# See https://stackoverflow.com/a/6384982/2796854
for pluginclass in pluginclasses:
if not isinstance(pluginclass, type) or not issubclass(pluginclass, PyPlugin):
raise ValueError(f"{pluginclass} must be an uninstantiated subclass of PyPlugin")
# If PyPlugin is in scope it should not be treated as a plugin
if pluginclass is PyPlugin:
continue
name = pluginclass.__name__
self.plugins[name] = pluginclass.__new__(pluginclass)
self.plugins[name].__preinit__(self, args)
self.get_ppp_funcs(self.plugins[name])
self.plugins[name].__init__(self.panda)
# Setup webserver if necessary
if self.flask and hasattr(self.plugins[name], 'webserver_init') and \
callable(self.plugins[name].webserver_init):
self.plugins[name].flask = self.app
# If no template_dir was provided, try using ./templates in the dir of the plugin
# if we know it, otherwise ./templates
if template_dir is None:
if pluginpath is not None:
template_dir = (Path(pluginpath).parent / "templates").absolute()
elif (Path(".") / "templates").exists():
template_dir = (Path(".") / "templates").absolute()
else:
print("Warning: pyplugin couldn't find a template dir")
bp = self.blueprint(name, __name__, template_folder=template_dir)
self.plugins[name].webserver_init(bp)
self.app.register_blueprint(bp, url_prefix=f"/{name}")
def load_all(self, plugin_file, args=None, template_dir=None):
'''
Given a path to a python file, load every PyPlugin defined in that file
by identifying all classes that subclass PyPlugin and passing them to
self.load()
Args:
plugin_file (str): A path specifying a Python file from which PyPlugin classes should be loaded
args (dict): Optional. A dictionary of arguments to pass to the PyPlugin
template_dir (string): Optional. A directory for template files, passed through to `self.load`.
Returns:
String list of PyPlugin class names loaded from the plugin_file
'''
spec = importlib.util.spec_from_file_location("plugin_file", plugin_file)
if spec is None:
# Likely an invalid path
raise ValueError(f"Unable to load {plugin_file}")
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
names = []
for name, cls in inspect.getmembers(module, lambda x: inspect.isclass(x)):
if not issubclass(cls, PyPlugin) or cls == PyPlugin:
continue
cls.__name__ = name
self.load(cls, args, template_dir)
names.append(name)
return names
def unload(self, pluginclass, do_del=True):
'''
Given an instance of a PyPlugin or its name, unload it
'''
if isinstance(pluginclass, str) and pluginclass in self.plugins:
pluginclass = self.plugins[pluginclass]
if not isinstance(pluginclass, PyPlugin):
raise ValueError(f"Unload expects a name of a loaded pyplugin or a PyPlugin instance. Got {pluginclass} with plugin list: {self.plugins}")
# Call uninit method if it's present
if callable(getattr(pluginclass, "uninit", None)):
pluginclass.uninit()
# Remove by name
if do_del:
name = pluginclass.__class__.__name__
del self.plugins[name]
def unload_all(self):
'''
Unload all PyPlugins
'''
while self.plugins:
name, cls = self.plugins.popitem()
self.unload(cls, do_del=False)
def is_loaded(self, pluginclass):
# XXX should this end with .class.__name__?
name = pluginclass if isinstance(pluginclass, str) else pluginclass.__name__
return name in self.plugins
def get_plugin(self, pluginclass):
# Lookup name
# XXX should this end with .class.__name__?
name = pluginclass if isinstance(pluginclass, str) else pluginclass.__name__
if not self.is_loaded(pluginclass, name):
raise ValueError(f"Plugin {name} is not loaded")
return self.plugins[name]
def serve(self):
assert(self.flask)
assert(self.flask_thread is None)
from threading import Thread
self.flask_thread = Thread(target=self._do_serve, daemon=True)
self.flask_thread.start() # TODO: shut down more gracefully?
def _do_serve(self):
assert(self.flask)
@self.app.route("/")
def index():
return "PANDA PyPlugin web interface. Available plugins:" + "<br\>".join( \
[f"<li><a href='./{name}'>{name}</a></li>" \
for name in self.plugins.keys() \
if hasattr(self.plugins[name], 'flask')])
self.app.run(host=self.host, port=self.port)
if __name__ == '__main__':
from pandare import Panda
panda = Panda(generic="x86_64")
globals()['_test_class_init_ran'] = False
globals()['_test_get_arg_foo'] = False
globals()['_test_print_hello_false'] = False
globals()['_test_print_hello2_true'] = False
globals()['_test_deleted'] = False
class TestPlugin(PyPlugin):
def __init__(self, panda):
path = self.get_arg('path')
print(f"path = {path}")
global _test_class_init_ran, _test_get_arg_foo, \
_test_print_hello_false, _test_print_hello2_true
_test_class_init_ran = True
_test_get_arg_foo = path == "/foo"
should_print_hello = self.get_arg_bool('should_print_hello')
if should_print_hello:
print("Hello!")
else:
_test_print_hello_false = True
should_print_hello2 = self.get_arg_bool('should_print_hello2')
if should_print_hello2:
_test_print_hello2_true = True
def __del__(self):
global _test_deleted
_test_deleted = True
panda.pyplugins.load(TestPlugin, {'path': '/foo', 'should_print_hello': False,
'should_print_hello2': True})
@panda.queue_blocking
def driver():
panda.revert_sync("root")
assert(panda.run_serial_cmd("whoami") == 'root'), "Bad guest behavior"
panda.pyplugins.unload(TestPlugin)
panda.end_analysis()
panda.run()
for k in ['_test_class_init_ran', '_test_print_hello_false', '_test_get_arg_foo',
'_test_print_hello2_true','_test_deleted']:
assert(globals()[k] == True), f"Failed test {k}"</code></pre>
</details>
</section>
<section>
</section>
<section>
</section>
<section>
</section>
<section>
<h2 class="section-title" id="header-classes">Classes</h2>
<dl>
<dt id="pandare.pypluginmanager.PyPluginManager"><code class="flex name class">
<span>class <span class="ident">PyPluginManager</span></span>
<span>(</span><span>panda, flask=False, host='127.0.0.1', port=8080, silence_warning=False)</span>
</code></dt>
<dd>
<div class="desc"><p>Set up an instance of PyPluginManager.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">class PyPluginManager:
def __init__(self, panda, flask=False, host='127.0.0.1', port=8080, silence_warning=False):
'''
Set up an instance of PyPluginManager.
'''
self.panda = panda
self.plugins = {}
self.silence_warning = silence_warning
self._ppp_plugins = _PppPlugins()
self.flask = flask
self.port = None
self.host = None
self.app = None
self.blueprint = None
self.flask_thread = None
if self.flask:
self.enable_flask(host, port)
@property
def ppp(self):
return self._ppp_plugins
def get_ppp_funcs(self, plugin):
# iterate over each attribute in the class `plugin`
for item_name in dir(plugin):
item = getattr(plugin, item_name)
# check if the class attribute has a field called `__is_pyplugin_ppp`
#print("CHECK:", item, hasattr(item, "__is_pyplugin_ppp"))
if hasattr(item, "_PyPlugin__is_pyplugin_ppp") and getattr(item, "_PyPlugin__is_pyplugin_ppp"):
self.ppp.add(plugin.__class__.__name__, item.__name__, item)
def enable_flask(self, host='127.0.0.1', port=8080):
'''
Enable flask mode for this instance of the PyPlugin manager. Registered PyPlugins
which support flask will be made available at the web interfaces.
'''
if len(self.plugins) and not self.silence_warning:
print("WARNING: You've previously registered some PyPlugins prior to enabling flask")
print(f"Plugin(s) {self.plugins.keys()} will be unable to use flask")
from flask import Flask, Blueprint
self.flask = True
self.app = Flask(__name__)
self.blueprint = Blueprint
self.host = host
self.port = port
def load_plugin_class(self, plugin_file, class_names):
'''
For backwards compatability with PyPlugins which subclass
PyPlugin without importing it.
Given a path to a python file which has a class that subclasses
PyPlugin, set up the imports correctly such that we can
generate an uninstantiated instance of that class and return
that object.
Note you can also just add `from pandare import PyPlugin` to
the plugin file and then just import the class(es) you want and pass them
directly to panda.pyplugins.register()
This avoids the `NameError: name 'PyPlugin' is not defined` which
you would get from directly doing `import [class_name] from [plugin_file]`
'''
spec = importlib.util.spec_from_file_location(plugin_file.split("/")[-1], plugin_file)
if spec is None:
raise ValueError(f"Unable to resolve plugin {plugin_file}")
plugin = importlib.util.module_from_spec(spec)
plugin.PyPlugin = PyPlugin
spec.loader.exec_module(plugin)
classes = []
success = False
for class_name in class_names:
if not hasattr(plugin, class_name):
continue
cls = getattr(plugin, class_name)
assert issubclass(cls, PyPlugin), f"Class {class_name} does not subclass PyPlugin"
classes.append(cls)
success = True
if not success:
print(f"Warning: {plugin_file} does not contain any of the requested classes {class_names}")
return classes
def load(self, pluginclasses, args=None, template_dir=None):
'''
Load (aka register) a PyPANDA plugin to run. It can later be unloaded
by using panda.pyplugins.unload(name).
pluginclasses can either be an uninstantiated python class, a list of such classes,
or a tuple of (path_to_module.py, [classnames]) where classnames is a list of
clases subclasses which subclass PyPlugin.
Each plugin class will be stored in self.plugins under the class name
'''
if args is None:
args = {}
pluginpath = None
if isinstance(pluginclasses, tuple):
# Tuple: use self.load_plugin_class to load the requested classes from
# the provided file
pluginpath, clsnames = pluginclasses
pluginclasses = self.load_plugin_class(pluginpath, clsnames)
elif not isinstance(pluginclasses, list):
# Single element: make it a list with one item
pluginclasses = [pluginclasses]
# This is a little tricky - we can't just instantiate
# an instance of the object- it may use self.get_arg
# in its init method. To allow this behavior, we create
# the object, use the __preinit__ function defined above
# and then ultimately call the __init__ method
# See https://stackoverflow.com/a/6384982/2796854
for pluginclass in pluginclasses:
if not isinstance(pluginclass, type) or not issubclass(pluginclass, PyPlugin):
raise ValueError(f"{pluginclass} must be an uninstantiated subclass of PyPlugin")
# If PyPlugin is in scope it should not be treated as a plugin
if pluginclass is PyPlugin:
continue
name = pluginclass.__name__
self.plugins[name] = pluginclass.__new__(pluginclass)
self.plugins[name].__preinit__(self, args)
self.get_ppp_funcs(self.plugins[name])
self.plugins[name].__init__(self.panda)
# Setup webserver if necessary
if self.flask and hasattr(self.plugins[name], 'webserver_init') and \
callable(self.plugins[name].webserver_init):
self.plugins[name].flask = self.app
# If no template_dir was provided, try using ./templates in the dir of the plugin
# if we know it, otherwise ./templates
if template_dir is None:
if pluginpath is not None:
template_dir = (Path(pluginpath).parent / "templates").absolute()
elif (Path(".") / "templates").exists():
template_dir = (Path(".") / "templates").absolute()
else:
print("Warning: pyplugin couldn't find a template dir")
bp = self.blueprint(name, __name__, template_folder=template_dir)
self.plugins[name].webserver_init(bp)
self.app.register_blueprint(bp, url_prefix=f"/{name}")
def load_all(self, plugin_file, args=None, template_dir=None):
'''
Given a path to a python file, load every PyPlugin defined in that file
by identifying all classes that subclass PyPlugin and passing them to
self.load()
Args:
plugin_file (str): A path specifying a Python file from which PyPlugin classes should be loaded
args (dict): Optional. A dictionary of arguments to pass to the PyPlugin
template_dir (string): Optional. A directory for template files, passed through to `self.load`.
Returns:
String list of PyPlugin class names loaded from the plugin_file
'''
spec = importlib.util.spec_from_file_location("plugin_file", plugin_file)
if spec is None:
# Likely an invalid path
raise ValueError(f"Unable to load {plugin_file}")
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
names = []
for name, cls in inspect.getmembers(module, lambda x: inspect.isclass(x)):
if not issubclass(cls, PyPlugin) or cls == PyPlugin:
continue
cls.__name__ = name
self.load(cls, args, template_dir)
names.append(name)
return names
def unload(self, pluginclass, do_del=True):
'''
Given an instance of a PyPlugin or its name, unload it
'''
if isinstance(pluginclass, str) and pluginclass in self.plugins:
pluginclass = self.plugins[pluginclass]
if not isinstance(pluginclass, PyPlugin):
raise ValueError(f"Unload expects a name of a loaded pyplugin or a PyPlugin instance. Got {pluginclass} with plugin list: {self.plugins}")
# Call uninit method if it's present
if callable(getattr(pluginclass, "uninit", None)):
pluginclass.uninit()
# Remove by name
if do_del:
name = pluginclass.__class__.__name__
del self.plugins[name]
def unload_all(self):
'''
Unload all PyPlugins
'''
while self.plugins:
name, cls = self.plugins.popitem()
self.unload(cls, do_del=False)
def is_loaded(self, pluginclass):
# XXX should this end with .class.__name__?
name = pluginclass if isinstance(pluginclass, str) else pluginclass.__name__
return name in self.plugins
def get_plugin(self, pluginclass):
# Lookup name
# XXX should this end with .class.__name__?
name = pluginclass if isinstance(pluginclass, str) else pluginclass.__name__
if not self.is_loaded(pluginclass, name):
raise ValueError(f"Plugin {name} is not loaded")
return self.plugins[name]
def serve(self):
assert(self.flask)
assert(self.flask_thread is None)
from threading import Thread
self.flask_thread = Thread(target=self._do_serve, daemon=True)
self.flask_thread.start() # TODO: shut down more gracefully?
def _do_serve(self):
assert(self.flask)
@self.app.route("/")
def index():
return "PANDA PyPlugin web interface. Available plugins:" + "<br\>".join( \
[f"<li><a href='./{name}'>{name}</a></li>" \
for name in self.plugins.keys() \
if hasattr(self.plugins[name], 'flask')])
self.app.run(host=self.host, port=self.port)</code></pre>
</details>
<h3>Instance variables</h3>
<dl>
<dt id="pandare.pypluginmanager.PyPluginManager.ppp"><code class="name">var <span class="ident">ppp</span></code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">@property
def ppp(self):
return self._ppp_plugins</code></pre>
</details>
</dd>
</dl>
<h3>Methods</h3>
<dl>
<dt id="pandare.pypluginmanager.PyPluginManager.enable_flask"><code class="name flex">
<span>def <span class="ident">enable_flask</span></span>(<span>self, host='127.0.0.1', port=8080)</span>
</code></dt>
<dd>
<div class="desc"><p>Enable flask mode for this instance of the PyPlugin manager. Registered PyPlugins
which support flask will be made available at the web interfaces.</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def enable_flask(self, host='127.0.0.1', port=8080):
'''
Enable flask mode for this instance of the PyPlugin manager. Registered PyPlugins
which support flask will be made available at the web interfaces.
'''
if len(self.plugins) and not self.silence_warning:
print("WARNING: You've previously registered some PyPlugins prior to enabling flask")
print(f"Plugin(s) {self.plugins.keys()} will be unable to use flask")
from flask import Flask, Blueprint
self.flask = True
self.app = Flask(__name__)
self.blueprint = Blueprint
self.host = host
self.port = port</code></pre>
</details>
</dd>
<dt id="pandare.pypluginmanager.PyPluginManager.get_plugin"><code class="name flex">
<span>def <span class="ident">get_plugin</span></span>(<span>self, pluginclass)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def get_plugin(self, pluginclass):
# Lookup name
# XXX should this end with .class.__name__?
name = pluginclass if isinstance(pluginclass, str) else pluginclass.__name__
if not self.is_loaded(pluginclass, name):
raise ValueError(f"Plugin {name} is not loaded")
return self.plugins[name]</code></pre>
</details>
</dd>
<dt id="pandare.pypluginmanager.PyPluginManager.get_ppp_funcs"><code class="name flex">
<span>def <span class="ident">get_ppp_funcs</span></span>(<span>self, plugin)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def get_ppp_funcs(self, plugin):
# iterate over each attribute in the class `plugin`
for item_name in dir(plugin):
item = getattr(plugin, item_name)
# check if the class attribute has a field called `__is_pyplugin_ppp`
#print("CHECK:", item, hasattr(item, "__is_pyplugin_ppp"))
if hasattr(item, "_PyPlugin__is_pyplugin_ppp") and getattr(item, "_PyPlugin__is_pyplugin_ppp"):
self.ppp.add(plugin.__class__.__name__, item.__name__, item)</code></pre>
</details>
</dd>
<dt id="pandare.pypluginmanager.PyPluginManager.is_loaded"><code class="name flex">
<span>def <span class="ident">is_loaded</span></span>(<span>self, pluginclass)</span>
</code></dt>
<dd>
<div class="desc"></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def is_loaded(self, pluginclass):
# XXX should this end with .class.__name__?
name = pluginclass if isinstance(pluginclass, str) else pluginclass.__name__
return name in self.plugins</code></pre>
</details>
</dd>
<dt id="pandare.pypluginmanager.PyPluginManager.load"><code class="name flex">
<span>def <span class="ident">load</span></span>(<span>self, pluginclasses, args=None, template_dir=None)</span>
</code></dt>
<dd>
<div class="desc"><p>Load (aka register) a PyPANDA plugin
to run. It can later be unloaded
by using panda.pyplugins.unload(name).</p>
<p>pluginclasses can either be an uninstantiated python class, a list of such classes,
or a tuple of (path_to_module.py, [classnames]) where classnames is a list of
clases subclasses which subclass PyPlugin.</p>
<p>Each plugin class will be stored in self.plugins under the class name</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def load(self, pluginclasses, args=None, template_dir=None):
'''
Load (aka register) a PyPANDA plugin to run. It can later be unloaded
by using panda.pyplugins.unload(name).
pluginclasses can either be an uninstantiated python class, a list of such classes,
or a tuple of (path_to_module.py, [classnames]) where classnames is a list of
clases subclasses which subclass PyPlugin.
Each plugin class will be stored in self.plugins under the class name
'''
if args is None:
args = {}
pluginpath = None
if isinstance(pluginclasses, tuple):
# Tuple: use self.load_plugin_class to load the requested classes from
# the provided file
pluginpath, clsnames = pluginclasses
pluginclasses = self.load_plugin_class(pluginpath, clsnames)
elif not isinstance(pluginclasses, list):
# Single element: make it a list with one item
pluginclasses = [pluginclasses]
# This is a little tricky - we can't just instantiate
# an instance of the object- it may use self.get_arg
# in its init method. To allow this behavior, we create
# the object, use the __preinit__ function defined above
# and then ultimately call the __init__ method
# See https://stackoverflow.com/a/6384982/2796854
for pluginclass in pluginclasses:
if not isinstance(pluginclass, type) or not issubclass(pluginclass, PyPlugin):
raise ValueError(f"{pluginclass} must be an uninstantiated subclass of PyPlugin")
# If PyPlugin is in scope it should not be treated as a plugin
if pluginclass is PyPlugin:
continue
name = pluginclass.__name__
self.plugins[name] = pluginclass.__new__(pluginclass)
self.plugins[name].__preinit__(self, args)
self.get_ppp_funcs(self.plugins[name])
self.plugins[name].__init__(self.panda)
# Setup webserver if necessary
if self.flask and hasattr(self.plugins[name], 'webserver_init') and \
callable(self.plugins[name].webserver_init):
self.plugins[name].flask = self.app
# If no template_dir was provided, try using ./templates in the dir of the plugin
# if we know it, otherwise ./templates
if template_dir is None:
if pluginpath is not None:
template_dir = (Path(pluginpath).parent / "templates").absolute()
elif (Path(".") / "templates").exists():
template_dir = (Path(".") / "templates").absolute()
else:
print("Warning: pyplugin couldn't find a template dir")
bp = self.blueprint(name, __name__, template_folder=template_dir)
self.plugins[name].webserver_init(bp)
self.app.register_blueprint(bp, url_prefix=f"/{name}")</code></pre>
</details>
</dd>
<dt id="pandare.pypluginmanager.PyPluginManager.load_all"><code class="name flex">
<span>def <span class="ident">load_all</span></span>(<span>self, plugin_file, args=None, template_dir=None)</span>
</code></dt>
<dd>
<div class="desc"><p>Given a path to a python file, load every PyPlugin defined in that file
by identifying all classes that subclass PyPlugin and passing them to
self.load()</p>
<h2 id="args">Args</h2>
<dl>
<dt><strong><code>plugin_file</code></strong> : <code>str</code></dt>
<dd>A path specifying a Python file from which PyPlugin classes should be loaded</dd>
<dt><strong><code>args</code></strong> : <code>dict</code></dt>
<dd>Optional. A dictionary of arguments to pass to the PyPlugin</dd>
<dt><strong><code>template_dir</code></strong> : <code>string</code></dt>
<dd>Optional. A directory for template files, passed through to <code>self.load</code>.</dd>
</dl>
<h2 id="returns">Returns</h2>
<p>String list of PyPlugin class names loaded from the plugin_file</p></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">def load_all(self, plugin_file, args=None, template_dir=None):
'''
Given a path to a python file, load every PyPlugin defined in that file
by identifying all classes that subclass PyPlugin and passing them to
self.load()
Args:
plugin_file (str): A path specifying a Python file from which PyPlugin classes should be loaded
args (dict): Optional. A dictionary of arguments to pass to the PyPlugin
template_dir (string): Optional. A directory for template files, passed through to `self.load`.
Returns:
String list of PyPlugin class names loaded from the plugin_file
'''
spec = importlib.util.spec_from_file_location("plugin_file", plugin_file)
if spec is None:
# Likely an invalid path
raise ValueError(f"Unable to load {plugin_file}")
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)