def startup(arguments):
env = Environment() # 1. create env.
file_name_str, solution_file_name_str = read_input_string(arguments) # 2. read filenames
ast_string, error = file_to_AST_str_no_print(file_name_str) # 3. parse input-file to string
if error:
print error
env.set_search_dir(file_name_str)
#env.parse_config_parameter(argv)
root = str_ast_to_python_ast(ast_string) # 4. parse string to python ast
# uncomment for profiling (e.g. performance tests)
#import cProfile
#cProfile.run('mch = interpret(root, env)','pyB_profile_out.txt')
solution_file_present = not solution_file_name_str==""
if solution_file_present: # 5. parse solution-file and write to env.
read_solution_file(env, solution_file_name_str) # The concreate solution values are added at
# the bmachine object-init time to the respective mch
# 6. replace defs and extern-functions inside mch and solution-file (if present)
parse_object = remove_defs_and_parse_ast(root, env) # 7. which kind of ast?
return root, env, parse_object, solution_file_present
