Determine whether static file site contains css inheritance rule - css

Question

I'm working on a site that renders static html files, and I wish to determine which pages in the site contain a specific css inheritance rule, such as .parent .child (a child class that descends from a parent).
I can imagine a web crawler that accesses each of those pages, runs a test to see whether the given page has that style, and returns a report, but are there any tools that already perform this work well for static file sites (e.g. not the css-tree-shake-plugin for webpack)? I'd be grateful for any insights others can offer on this question.

Answer 1

Here's what I came up with:
#!/usr/bin/env python
'''
from source:
pip install selenium
pip install beautifulsoup4
brew install phantomjs
usage: python shake_trees.py '_site' '.parent .child'
'''
from bs4 import BeautifulSoup
from selenium import webdriver
import sys, copy, multiprocessing, os, fnmatch
def clean_href(href):
return href.split('#')[0].split('?')[0]
def get_web_urls(all_links, visited):
recurse = False
for link in copy.copy(all_links):
if link not in visited:
visited.add(link)
driver.get(link)
for tag in driver.find_elements_by_tag_name('a'):
href = clean_href(tag.get_attribute('href'))
if domain in href and href not in visited:
recurse = True
all_links.add(href)
if recurse:
return get_web_urls(all_links, visited)
else:
print(all_links, visited)
return all_links
def get_static_site_urls():
matches = []
for root, dirnames, filenames in os.walk(root_url):
for filename in fnmatch.filter(filenames, file_match):
matches.append(os.path.join(root, filename))
return matches
if __name__ == '__main__':
# parse command line arguments
root_url = sys.argv[1]
css_selector = sys.argv[2]
# globals
domain = root_url
static_site = False if 'http' in root_url else True
file_match = '*.html'
# initialize the phantom driver
driver = webdriver.PhantomJS()
driver.set_window_size(1000, 1000)
if static_site:
urls = get_static_site_urls()
else:
driver.get( root_url )
urls = get_web_urls( set([root_url]), set() )
for url in urls:
if static_site:
url = 'file://' + os.path.join(os.getcwd(), url)
driver.get(url)
soup = BeautifulSoup( driver.page_source, 'html.parser' )
if soup.select_one(css_selector):
print('match on', url)