def _check_tags_untag(core, front_end: Frontend, run_options: RunOptions):
present_tags = core.list(run_options.files)
if len(present_tags) == 0:
raise ParseError("Cannot execute command \"" +
run_options.action.name +
"\": No tags present on selected files")
run_options.tags = front_end.get_tags(sorted(list(present_tags)), False)
def _check_tags(core: TieCore, front_end: Frontend, run_options: RunOptions):
if run_options.needs_tags():
if run_options.action == Action.untag:
_check_tags_untag(core, front_end, run_options)
else:
run_options.tags = front_end.get_tags(
core.list_all_tags(), run_options.allows_tag_creation())
if len(run_options.tags) == 0:
raise ParseError("Cannot execute command \"" +
run_options.action.name +
"\" with empty tags list")
