scripts/check_files_changed.py

#!/usr/bin/python3

import argparse
import os


def main():
  parser = argparse.ArgumentParser()
  parser.add_argument('filename', help='Scripts to read', type=str)
  parser.add_argument(
      '--files-contain', dest='files_contain', default='/', type=str
  )
  args = parser.parse_args()

  script_to_check = args.filename
  file_paths_contain = args.files_contain

  file_edit_dates = {}
  outputs = {}
  files_exist = {}
  with open(script_to_check, 'r') as f:
    for line in f.readlines():
      if line.lstrip().startswith('#'):
        continue
      file_names = [x.strip() for x in line.split(' ')]
      # Filter file names based on presence of 'files_contain'
      file_names = [x for x in file_names if file_paths_contain in x]
      if len(file_names) >= 3:
        # outputs[file_names[1]] = file_names[0]
        # i==0 is script. i==1 is input file. i>=1 is for output files
        for i, file_name in enumerate(file_names):
          if file_name not in files_exist:
            files_exist[file_name] = os.path.exists(file_name)

          # if file doesn't exist
          if not files_exist[file_name]:
            # if output file does not exist
            if i > 1:
              file_edit_dates[file_name] = 0
            else:
              continue
          if file_name not in file_edit_dates:
            file_edit_dates[file_name] = os.path.getmtime(file_name)
          if i > 1:
            outputs[file_name] = file_names[1]

  for out_file, in_file in outputs.items():
    if file_edit_dates[in_file] > file_edit_dates[out_file]:
      print(out_file)


if __name__ == '__main__':
  main()