This script helps with testing pelican-themes.

pick_random_theme

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# pick_random_theme - Thursday, June 20, 2019
""" This script will choose a random theme from pelican-themes and symlink it
	in the project folder. Previously chosen themes are stored in TESTED_THEMES_FILENAME.
	To loop through the themes again, delete TESTED_THEMES_FILENAME from disk or change
	the filename.

	Usage: pick_random_theme

	Set THEME = 'random_theme' in your Pelican settings file (ie. pelicanconf.py)
"""
__version__ = '1.0.0'

import os
import sys
from os.path import basename, dirname, exists, lexists, realpath, abspath
from random import choice

sys.path.append(os.curdir)
from themes import Themes

TESTED_THEMES_FILENAME = 'tested_themes.txt'

def main():
	random_theme = choice(Themes)
	tested_themes = []
	if os.path.exists(TESTED_THEMES_FILENAME):
		with open(TESTED_THEMES_FILENAME, 'rt') as f:
			for line in f.readlines():
				tested_themes.append(line.strip())
	while random_theme in tested_themes:
		random_theme = choice(Themes)
	with open(TESTED_THEMES_FILENAME, 'at') as f:
		f.write(random_theme + os.linesep)
	make_symlink(random_theme, 'random_theme', overwrite=True)
	print("\n\tTheme: %s\n" % random_theme)
	return

def make_symlink(filename, linkname, overwrite=False):
	if exists(linkname) and overwrite:
		if realpath(filename) != realpath(linkname):
			os.unlink(linkname)
	if not lexists(linkname):
		if dirname(abspath(filename)) == dirname(abspath(linkname)):
			cur_dir = abspath(os.curdir)
			dir_name = dirname(filename)
			os.chdir(dir_name)
			filename = basename(filename)
			linkname = basename(linkname)
			# print("%s/%s -> %s" % (dir_name, linkname, filename))
			os.symlink(filename, linkname)
			os.chdir(cur_dir)
		else:
			os.symlink(filename, linkname)
	return

if __name__ == '__main__':
	main()