esp-idf/tools/ci/check_readme_links.py

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Python
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#!/usr/bin/env python
#
# Checks that all links in the readme markdown files are valid
#
# Copyright 2020 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import argparse
import concurrent.futures
import os
import os.path
import re
import urllib.error
import urllib.request
from collections import defaultdict, namedtuple
from pathlib import Path
EXCLUDE_DOCS_LIST = ['examples/peripherals/secure_element/atecc608_ecdsa/components/esp-cryptoauthlib/cryptoauthlib/**']
# The apple apps links are not accessible from the company network for some reason
EXCLUDE_URL_LIST = ['https://apps.apple.com/in/app/esp-ble-provisioning/id1473590141', 'https://apps.apple.com/in/app/esp-softap-provisioning/id1474040630']
Link = namedtuple('Link', ['file', 'url'])
class ReadmeLinkError(Exception):
def __init__(self, file, url):
self.file = file
self.url = url
class RelativeLinkError(ReadmeLinkError):
def __str__(self):
return 'Relative link error, file - {} not found, linked from {}'.format(self.url, self.file)
class UrlLinkError(ReadmeLinkError):
def __init__(self, file, url, error_code):
self.error_code = error_code
super().__init__(file, url)
def __str__(self):
files = [str(f) for f in self.file]
return 'URL error, url - {} in files - {} is not accessible, request returned {}'.format(self.url, ', '.join(files), self.error_code)
# we do not want a failed test just due to bad network conditions, for non 404 errors we simply print a warning
def check_url(url, files, timeout):
try:
with urllib.request.urlopen(url, timeout=timeout):
return
except urllib.error.HTTPError as e:
if e.code == 404:
raise UrlLinkError(files, url, str(e))
else:
print('Unable to access {}, err = {}'.format(url, str(e)))
except Exception as e:
print('Unable to access {}, err = {}'.format(url, str(e)))
def check_web_links(web_links):
with concurrent.futures.ThreadPoolExecutor(max_workers=10) as executor:
errors = []
future_to_url = {executor.submit(check_url, url, files, timeout=30): (url, files) for url, files in web_links.items()}
for future in concurrent.futures.as_completed(future_to_url):
try:
future.result()
except UrlLinkError as e:
errors.append(e)
return errors
def check_file_links(file_links):
errors = []
for link in file_links:
link_path = link.file.parent / link.url
if not Path.exists(link_path):
errors.append(RelativeLinkError(link.file, link.url))
print('Found {} errors with relative links'.format(len(errors)))
return errors
def get_md_links(folder):
MD_LINK_RE = r'\[.+?\]\((.+?)(#.+)?\)'
idf_path = Path(os.getenv('IDF_PATH'))
links = []
for path in (idf_path / folder).rglob('*.md'):
if any([path.relative_to(idf_path).match(exclude_doc) for exclude_doc in EXCLUDE_DOCS_LIST]):
print('{} - excluded'.format(path))
continue
with path.open(encoding='utf8') as f:
content = f.read()
for url in re.findall(MD_LINK_RE, content):
link = Link(path, url[0].lstrip())
# Ignore "local" links
if not link.url.startswith('#'):
links.append(link)
return links
def check_readme_links(args):
links = get_md_links('examples')
print('Found {} links'.format(len(links)))
errors = []
web_links = defaultdict(list)
file_links = []
# Sort links into file and web links
for link in links:
if link.url.startswith('http'):
web_links[link.url].append(link.file)
else:
file_links.append(link)
for url in EXCLUDE_URL_LIST:
del web_links[url]
errors.extend(check_file_links(file_links))
if not args.skip_weburl:
errors.extend(check_web_links(web_links))
print('Found {} errors:'.format(len(errors)))
for e in errors:
print(e)
if errors:
raise e
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='check_readme_links.py: Checks for dead links in example READMEs', prog='check_readme_links.py')
parser.add_argument('--skip-weburl', '-w', action='store_true', help='Skip checking of web URLs, only check links to local files')
args = parser.parse_args()
check_readme_links(args)