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"""Plugin management for coverage.py"""
import sys
class CoveragePlugin(object):
"""Base class for coverage.py plugins."""
def __init__(self, options):
self.options = options
def trace_judge(self):
"""Return a callable that can decide whether to trace a file or not.
The callable should take a filename, and return a coverage.TraceDisposition
object.
"""
return None
# TODO: why does trace_judge return a callable, but source_file_name is callable?
def source_file_name(self, filename):
"""Return the source name for a given Python filename.
Can return None if tracing shouldn't continue.
"""
return filename
def dynamic_source_file_name(self):
"""Returns a callable that can return a source name for a frame.
The callable should take a filename and a frame, and return either a
filename or None:
def dynamic_source_filename_func(filename, frame)
Can return None if dynamic filenames aren't needed.
"""
return None
def load_plugins(modules, config):
"""Load plugins from `modules`.
Returns a list of loaded and configured plugins.
"""
plugins = []
for module in modules:
__import__(module)
mod = sys.modules[module]
plugin_class = getattr(mod, "Plugin", None)
if plugin_class:
options = config.get_plugin_options(module)
plugin = plugin_class(options)
plugin.__name__ = module
plugins.append(plugin)
return plugins
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