begins: run a series of subcommands

script_subcommand.py

"""
Run a series of subcommands from the script file.
"""
import shlex
import begin
import __main__

@begin.subcommand
@begin.convert(script=begin.utils.tofile())
def script(script):
    "Execute subcommands from the input script."
    # Find the main.
    for attr in dir(__main__):
        main = getattr(__main__, attr)
        if isinstance(main, begin.main.Program):
            break
    else:
        raise Exception("Failed to find begin's start")
    
    # Run each subcommand.
    for line in script.readlines():
        line = line.strip()
        if not line or line.startswith("#"):
            continue
        command = shlex.split(line)
        opts = main._parser.parse_args(command)
        begin.cmdline.apply_options(main.__wrapped__, opts,
                run_main=False, sub_group=main._group, 
                collector=main._collector)