def validate_required_plugins(self, plugin):
plugin_handler = PluginInformationHandler(
self.get_full_path_to_archive())
info_file = plugin_handler.get_info()
available_plugins = []
for in_info_file_specified in info_file['requires']:
if in_info_file_specified['name'] == plugin.name:
available_plugins = plugin_handler.find_required_plugins(
in_info_file_specified)
if plugin not in available_plugins:
raise ValidationError(
'Plugin %s can not be used as substitution!' % str(plugin))
def get_substitution_plugin_for(self, plugin):
# Read the information in again from the tar archive
plugin_handler = PluginInformationHandler(
self.get_full_path_to_archive())
info_file = plugin_handler.get_info()
fitting_plugin = None
# Go through all plugins that are required, to find the one that must be substituted
for info_req_plugins in info_file['requires']:
if info_req_plugins['name'] == plugin.name:
# Get all plugins that match the statement in the json file
substitution_plugins = plugin_handler.find_required_plugins(
info_req_plugins)
# Delete the plugin that is possibly already there as match
available_plugins = [
avail_plugin for avail_plugin in substitution_plugins
if avail_plugin != plugin
]
if available_plugins:
# Find the best plugin
fitting_plugin = max(available_plugins,
key=lambda x: x.version)
return fitting_plugin