#!/usr/bin/python
import sys
import os

# TODO: parse parameters to allow checking more than one file at a time, and
# propagating parameters to pylint.
assert len(sys.argv) == 2, 'One and only one parameter expected.'

source_file_name = sys.argv[1]
source_file = open(source_file_name, 'r')

line = source_file.readline()
assert line.startswith('## Script (Python)'), repr(line)

builtin_list = []
append = builtin_list.append
while line.startswith('##'):
  line = line.lstrip('#').strip()
  if line.startswith('bind'):
    assert '=' in line, repr(line)
    value = line.split('=', 1)[1]
    if value:
      append(value)
  elif line.startswith('parameters'):
    assert '=' in line, repr(line)
    for param in line.split('=', 1)[1].split(','):
      if '=' in param:
        param = param.split('=', 1)[0]
      append(param.strip(' *'))
  line = source_file.readline()

# Call pylint with given Python Script file.
# - add script parameters as additional built-ins
# - disable E0104 (return outside of function), as top-level block behaves just
#   as a function.
# - disable persistence of results
os.system('pylint --additional-builtins=%(builtins)s --disable-msg=E0104 ' \
  '--persistent=n %(file)s' % {
  'file': source_file_name,
  'builtins': ','.join(builtin_list)
})