old_contents: import hmac
  import hashlib
  from flask import current_app as app
  from urllib.parse import urlparse
  from github import Github
  
  
  def verify_signature(gh_signature, body, secret):
      sha1 = hmac.new(secret.encode(), body, hashlib.sha1).hexdigest()
      return hmac.compare_digest('sha1=' + sha1, gh_signature)
  
  
  def auth():
      g = Github(app.config['GITHUB_OAUTH_TOKEN'])
      return g
  
  
  def get_developers(repo_url):
      o = urlparse(repo_url)
      repo = o.path[1:].strip('.git')
  
      g = auth()
      repository = g.get_repo(repo)
      contributors = repository.get_contributors()
      developers = []
      for c in contributors:
          dev = {'email': c.email, 'page': c.html_url, 'avatar': c.avatar_url}
          dev['name'] = c.name if c.name else c.login
          developers.append(dev)
  
      return developers
  
  
  def find_tag_commit(repo_name, tag_name):
      g = auth()
      tags = g.get_repo(repo_name).get_tags()
      tag_commit = None
      for tag in tags:
          if tag.name == tag_name:
              tag_commit = tag.commit
  
      return tag_commit
  
  
  def comment_on_commit(commit, message):
      commit.create_comment(message)
  
new_contents: import hmac
  import hashlib
  from flask import current_app as app
  from urllib.parse import urlparse
  from github import Github
  
  
  def verify_signature(gh_signature, body, secret):
      sha1 = hmac.new(secret.encode(), body, hashlib.sha1).hexdigest()
      return hmac.compare_digest('sha1=' + sha1, gh_signature)
  
  
  def auth():
      g = Github(app.config['GITHUB_OAUTH_TOKEN'])
      return g
  
  
  def get_developers(repo_url):
      o = urlparse(repo_url)
      repo = o.path[1:].strip('.git')
  
      g = auth()
      repository = g.get_repo(repo)
      contributors = repository.get_contributors()
      developers = []
      for c in contributors:
          dev = {'email': c.email, 'page': c.html_url, 'avatar': c.avatar_url}
          dev['name'] = c.name if c.name else c.login
          developers.append(dev)
  
      return developers
  
  
  def find_tag_commit(repo_name, tag_name):
      g = auth()
      tags = g.get_repo(repo_name).get_tags()
      for tag in tags:
          if tag.name == tag_name:
              return tag.commit
  
      return None
  
  
  def comment_on_commit(commit, message):
      commit.create_comment(message)
  
subject: Improve performance of find tags function