def load_plugin(self, pkg, force=False):
"""
Load a plugin
@param pkg the plugin to load
@param force if True no checks for deps will performed
@return None or raise a PluginException
"""
if pkg in self.pkg_lst:
raise PluginException(pkg, _("Plugin already loaded."))
if not force:
# 1) Check for conflicts
ret = self.check_conflicts(pkg)
if ret:
reasons = []
for phase, (p_name, p_op, p_ver), (c_name, c_op, c_ver) in ret:
reasons.append( \
"-%d- Plugin '%s' provides %s which conflicts with " \
"%s conflict entry for plugin '%s'" % \
( \
phase, pkg, \
Version.stringify_version(p_name, p_op, p_ver), \
Version.stringify_version(p_name, c_op, c_ver), \
c_name \
) \
)
raise PluginException(pkg, "\n".join(reasons))
# 2) Check for needs
ret = self.check_needs(pkg)
if ret:
reasons = []
for (n_name, n_op, n_ver) in ret:
reasons.append( \
"-3- Plugin '%s' needs %s, which actually is not " \
"provided by any plugin." % \
( \
pkg, \
Version.stringify_version(n_name, n_op, n_ver) \
) \
)
raise PluginException(pkg, "\n".join(reasons))
self.__load_hook(pkg)
# Export to cache
self.add_plugin_to_cache(pkg)
self.dump()
def unload_plugin(self, pkg, force=False):
"""
Unload a plugin
@param pkg the plugin to unload
@param force if False check the depends
@return None or raise a PluginException
"""
if pkg not in self.pkg_lst:
raise Exception("Plugin not loaded.")
if not force:
# No conflict check here.
# 1) We should check need's list against pkg
ret = self.check_list_needs(pkg)
if ret:
reasons = []
for i in ret:
reasons.append(
"Plugin %s requires %s" % \
(i[0], Version.stringify_version(pkg, i[1], i[2]))
)
raise PluginException(pkg, "\n".join(reasons))
self.__unload_hook(pkg)
self.remove_plugin_from_cache(pkg)
self.dump()
