code: def generate_dockerfile(
      launch_project: LaunchProject,
      entry_point: EntryPoint,
      runner_type: str,
      builder_type: str,
      dockerfile: Optional[str] = None,
  ) -> str:
      override_entrypoint = (
          launch_project.override_entrypoint or entry_point
      )
      if launch_project.project_dir is not None:
          if not dockerfile and override_entrypoint.name is not None:
              entrypoint_dir = os.path.dirname(override_entrypoint.name)
              path = os.path.join(
                  launch_project.project_dir,
                  entrypoint_dir,
                  _DEFAULT_DOCKERFILE_NAME,
              )
              if os.path.exists(path):
                  dockerfile = os.path.join(
                      entrypoint_dir, _DEFAULT_DOCKERFILE_NAME
                  )
          if dockerfile:
              path = os.path.join(
                  launch_project.project_dir, dockerfile
              )
              if not os.path.exists(path):
                  raise LaunchError(
                      f"Dockerfile does not exist at {path}"
                  )
              wandb.termlog(f"Using dockerfile: {dockerfile}")
              return open(path).read()
  
      # get python versions truncated to major.minor to ensure image availability
      if launch_project.python_version:
          spl = launch_project.python_version.split(".")[:2]
          py_version, py_major = (".".join(spl), spl[0])
      else:
          py_version, py_major = get_current_python_version()
  
      # ----- stage 1: build -----
      if (
          launch_project.deps_type == "pip"
          or launch_project.deps_type is None
      ):
          python_build_image = f"python:{py_version}"  # use full python image for package installation
      elif launch_project.deps_type == "conda":
          # neither of these images are receiving regular updates, latest should be pretty stable
          python_build_image = (
              "continuumio/miniconda3:latest"
              if py_major == "3"
              else "continuumio/miniconda:latest"
          )
      requirements_section = get_requirements_section(
          launch_project, builder_type
      )
      # ----- stage 2: base -----
      python_base_setup = get_base_setup(
          launch_project, py_version, py_major
      )
  
      # set up user info
      username, userid = get_docker_user(launch_project, runner_type)
      user_setup = get_user_setup(username, userid, runner_type)
      workdir = f"/home/{username}"
  
      entrypoint_section = get_entrypoint_setup(entry_point)
  
      dockerfile_contents = DOCKERFILE_TEMPLATE.format(
          py_build_image=python_build_image,
          requirements_section=requirements_section,
          base_setup=python_base_setup,
          uid=userid,
          user_setup=user_setup,
          workdir=workdir,
          entrypoint_section=entrypoint_section,
      )
      return dockerfile_contents
  
imports: import hashlib
  import json
  import logging
  import os
  import shlex
  import shutil
  import sys
  import tempfile
  from typing import Any, Dict, List, Optional, Tuple
  import pkg_resources
  import yaml
  from dockerpycreds.utils import find_executable
  from six.moves import shlex_quote
  import wandb
  import wandb.docker
  import wandb.env
  from wandb.apis.internal import Api
  from wandb.sdk.launch.loader import builder_from_config, environment_from_config, registry_from_config
  from .._project_spec import EntryPoint, EntrypointDefaults, LaunchProject, fetch_and_validate_project
  from ..errors import ExecutionError, LaunchError
  from ..registry.abstract import AbstractRegistry
  from ..utils import AZURE_CONTAINER_REGISTRY_URI_REGEX, ELASTIC_CONTAINER_REGISTRY_URI_REGEX, GCP_ARTIFACT_REGISTRY_URI_REGEX, LAUNCH_CONFIG_FILE, LOG_PREFIX, event_loop_thread_exec, resolve_build_and_registry_config
label_desc: Use image node_id 9 for calling a global function with example usage: generate_dockerfile(launch_project, entry_point, runner_type, builder_type, dockerfile) and returns: dockerfile_contents, open