#! /bin/env python3
# encoding: utf-8

# library imports
import os
import over
import re
import sys
import time

# --------------------------------------------------

prefix = over.core.textui.prefix
_print = over.core.textui.Output('Find Orphans')

# --------------------------------------------------
# Functions

# --------------------------------------------------
# Classes

# --------------------------------------------------

if __name__ == '__main__':
	main = over.core.app.Main('Find Orphans', None, 'AWARE-Overwatch Joint Software License')
	main.add_option('filter', 'str', ['/home/*', '/var/*', '*.pyc'], 'Shell globs that should be filtered out.', plural=True)
	main.add_option('null-separated', 'bool', False, 'Output each filename separated with a null character. Otherwise use a newline.', short_name='0')
	main.add_help('Description', ['Finds files on Gentoo systems that aren\'t owned by any installed package and lists them.'])
	main.enable_help('h')
	main.parse()
	
	if not main.targets:
		_print('specify at least one directory to work on, e.g. \'/\'', prefix.fail)
		main.exit(silent=True)
	
	# --------------------------------------------------
	# Create a file list
	
	file_list = []
	threads = [] # {proc, output_buffer}
	
	for root in main.targets:
		proc = over.core.cmd.Command('find', root, '-print0')
		proc.run()
		threads.append({'proc': proc, 'output_buffer': []})
	
	_print('gathering file list using %d processes' %(len(threads)), prefix.start)
	
	while True:
		at_least_one_lives = False
		
		for thread in threads:
			tmp = thread['proc'].get_output()
			
			if not tmp is None:
				thread['output_buffer'].append(tmp)
				at_least_one_lives = True
		
		if at_least_one_lives:
			time.sleep(1)
		else:
			break
	
	_print('post-processing file list')