<s> from eralchemy . cst import GRAPH_BEGINNING <EOL> from eralchemy . sqla import metadata_to_intermediary , declarative_to_intermediary , database_to_intermediary <EOL> from pygraphviz . agraph import AGraph <EOL> from sqlalchemy . engine . url import make_url <EOL> from sqlalchemy . exc import ArgumentError <EOL> from eralchemy . parser import markdown_file_to_intermediary , line_iterator_to_intermediary , ParsingException <EOL> import sys <EOL> try : <EOL> basestring <EOL> except NameError : <EOL> basestring = str <EOL> def intermediary_to_markdown ( tables , relationships , output ) : <EOL> """<STR_LIT>""" <EOL> er_markup = _intermediary_to_markdown ( tables , relationships ) <EOL> with open ( output , "<STR_LIT:w>" ) as file_out : <EOL> file_out . write ( er_markup ) <EOL> def intermediary_to_dot ( tables , relationships , output ) : <EOL> """<STR_LIT>""" <EOL> dot_file = _intermediary_to_dot ( tables , relationships ) <EOL> with open ( output , "<STR_LIT:w>" ) as file_out : <EOL> file_out . write ( dot_file ) <EOL> def intermediary_to_schema ( tables , relationships , output ) : <EOL> """<STR_LIT>""" <EOL> dot_file = _intermediary_to_dot ( tables , relationships ) <EOL> graph = AGraph ( ) <EOL> graph = graph . from_string ( dot_file ) <EOL> extension = output . split ( '<STR_LIT:.>' ) [ - <NUM_LIT:1> ] <EOL> graph . draw ( path = output , prog = '<STR_LIT>' , format = extension ) <EOL> def _intermediary_to_markdown ( tables , relationships ) : <EOL> """<STR_LIT>""" <EOL> t = '<STR_LIT:\n>' . join ( t . to_markdown ( ) for t in tables ) <EOL> r = '<STR_LIT:\n>' . join ( r . to_markdown ( ) for r in relationships ) <EOL> return '<STR_LIT>' . format ( t , r ) <EOL> def _intermediary_to_dot ( tables , relationships ) : <EOL> """<STR_LIT>""" <EOL> t = '<STR_LIT:\n>' . join ( t . to_dot ( ) for t in tables ) <EOL> r = '<STR_LIT:\n>' . join ( r . to_dot ( ) for r in relationships ) <EOL> return '<STR_LIT>' . format ( GRAPH_BEGINNING , t , r ) <EOL> switch_input_class_to_method = { <EOL> '<STR_LIT>' : metadata_to_intermediary , <EOL> '<STR_LIT>' : declarative_to_intermediary , <EOL> '<STR_LIT>' : declarative_to_intermediary <EOL> } <EOL> switch_output_mode_auto = { <EOL> '<STR_LIT>' : intermediary_to_markdown , <EOL> '<STR_LIT>' : intermediary_to_schema , <EOL> '<STR_LIT>' : intermediary_to_dot <EOL> } <EOL> switch_output_mode = { <EOL> '<STR_LIT>' : intermediary_to_markdown , <EOL> '<STR_LIT>' : intermediary_to_dot , <EOL> } <EOL> def all_to_intermediary ( filename_or_input , schema = None ) : <EOL> """<STR_LIT>""" <EOL> input_class_name = filename_or_input . __class__ . __name__ <EOL> try : <EOL> this_to_intermediary = switch_input_class_to_method [ input_class_name ] <EOL> tables , relationships = this_to_intermediary ( filename_or_input ) <EOL> return tables , relationships <EOL> except KeyError : <EOL> pass <EOL> if isinstance ( filename_or_input , basestring ) : <EOL> if filename_or_input . split ( '<STR_LIT:.>' ) [ - <NUM_LIT:1> ] == '<STR_LIT>' : <EOL> return markdown_file_to_intermediary ( filename_or_input ) <EOL> if not isinstance ( filename_or_input , basestring ) : <EOL> if all ( isinstance ( e , basestring ) for e in filename_or_input ) : <EOL> return line_iterator_to_intermediary ( filename_or_input ) <EOL> try : <EOL> make_url ( filename_or_input ) <EOL> return database_to_intermediary ( filename_or_input , schema = schema ) <EOL> except ArgumentError : <EOL> pass <EOL> msg = '<STR_LIT>' . format ( input_class_name ) <EOL> raise ValueError ( msg ) <EOL> def get_output_mode ( output , mode ) : <EOL> """<STR_LIT>""" <EOL> if mode != '<STR_LIT>' : <EOL> try : <EOL> return switch_output_mode_auto [ mode ] <EOL> except KeyError : <EOL> raise ValueError ( '<STR_LIT>' ) <EOL> extension = output . split ( '<STR_LIT:.>' ) [ - <NUM_LIT:1> ] <EOL> try : <EOL> return switch_output_mode [ extension ] <EOL> except KeyError : <EOL> return intermediary_to_schema <EOL> def filter_excludes ( tables , relationships , exclude ) : <EOL> """<STR_LIT>""" <EOL> exclude = exclude or [ ] <EOL> tables_filtered = [ t for t in tables if t . name not in exclude ] <EOL> relationships_filtered = [ r for r in relationships <EOL> if r . right_col not in exclude and r . left_col not in exclude ] <EOL> return tables_filtered , relationships_filtered <EOL> def render_er ( input , output , mode = '<STR_LIT>' , exclude = None , schema = None ) : <EOL> """<STR_LIT>""" <EOL> try : <EOL> tables , relationships = all_to_intermediary ( input , schema = schema ) <EOL> if exclude is not None : <EOL> tables , relationships = filter_excludes ( tables , relationships , exclude ) <EOL> intermediary_to_output = get_output_mode ( output , mode ) <EOL> intermediary_to_output ( tables , relationships , output ) <EOL> except ImportError as e : <EOL> module_name = e . message . split ( ) [ - <NUM_LIT:1> ] <EOL> print ( '<STR_LIT>' . format ( module_name ) ) <EOL> except ParsingException as e : <EOL> sys . stderr . write ( e . message ) </s>
