First pass at previewing randomgeekery.org content with all themes in Hugo themes repository

hugo-theme-demo.py

#!/usr/bin/env python3

import os
import os.path
import subprocess
import time

from splinter import Browser

def is_theme_dir(folder, item):
    """Simple check for hidden and non-dir files"""
    if item[0] == '.':
        return False
    full_path = os.path.join(folder, item)
    if os.path.isfile(full_path):
        return False

    return True

if __name__ == '__main__':
    theme_dir = "themes"
    url = "http://127.0.0.1:1313"

    listing = [ item for item in os.listdir(theme_dir)
            if is_theme_dir(theme_dir, item) ]
    browser_name = 'chrome'
    browser = Browser(browser_name)
    browser.visit(url) # visit out here, reload down there because browser cache

    for theme in listing:
        command = [ "/usr/local/bin/hugo", "server", "--theme", theme ]
        proc = subprocess.Popen(command)
        time.sleep(1) # More than enough time for Hugo to build the site.
        browser.reload()
        time.sleep(2) # Allow browser to get external resources.
        message = "Theme: {}, Status: {}".format(theme, browser.status_code)
        print(message)
        screenshot_name = "{}-{}".format(browser_name, theme)
        screenshot_file = os.path.join(os.getcwd(), "screenshots", screenshot_name)
        browser.screenshot(screenshot_file)
        print("Screenshot saved as: {}".format(screenshot_file))
        proc.kill()
    browser.quit()

    # Make an animated GIF of the whole thing.
    # (When in doubt, ImageMagick)
    convert_command = [ "/usr/local/bin/convert",
            "-delay",  '35',
            "-loop",    '0',
            "-scale", '50%',
            "screenshots/*.png",
            "hugo-themes.gif" ]
    subprocess.run(convert_command)