class_docstr: Helps to build releases through scripting of steps.
class_docstr_tok: ["Helps","to","build","releases","through","scripting","of","steps","."]
docstr: Creates a release branch and optionally an updated version file.
docstr_tok: ["Creates","a","release","branch","and","optionally","an","updated","version","file","."]
code: def create_release_branch(self):
      """Creates a release branch and optionally an updated version file."""
      logging.info("Create release branch %s.", self.branch_name)
      logging.info(
          "Starting active branch:%s.", self.repo.active_branch
      )
  
      self._checkout_or_create_branch()
      if self.version_file:
          updated = self._update_version_file()
          if updated:
              self.repo.remotes.origin.push(self.branch_name)
              logging.info(
                  "Version file updated and pushed to remote %s",
                  self.repo.remotes.origin.url,
              )
  
file_path: agents/tools/release_builder.py
imports: import fileinput
  import os
  from absl import app
  from absl import flags
  from absl import logging
  from git import Repo
  from git.exc import GitCommandError
  from git.exc import InvalidGitRepositoryError
label_desc: Use image node_id 2 for calling the ReleaseBuilder obj's underlying member method code with example usage: obj.create_release_branch() without return types