linux-insides-links.py

import os
import re
import requests

GH_RE = re.compile("https:\/\/github\.com\/(\w+)\/(\w+)\/blob\/(master)")

commit_map = {}
def get_commit(repo):
    if not repo in commit_map:
        resp = requests.get("https://api.github.com/repos/{}/git/refs/heads/master".format(repo))
        resp.raise_for_status()

        commit_map[repo] = resp.json()['object']['sha']
    return commit_map[repo]



def replace_match(m):
    repo = m.group(1) + '/' + m.group(2)
    commit = get_commit(repo)

    return m.expand(r"https://github.com/\1/\2/blob/{}".format(commit))
    
def fixup_file(filename):
    with open(filename, 'r+') as f:
        data = f.read()
        new_data = re.sub(GH_RE, replace_match, data)


        f.seek(0)
        f.write(new_data)
        f.truncate()
        f.flush()



for root, dirs, files in os.walk('.'):
    for f in files:
        if f.endswith(".md"):
            fixup_file(os.path.join(root, f))