class_docstr: This class exists to allow virtual environment creation to be
  customized. The constructor parameters determine the builder's
  behaviour when called upon to create a virtual environment.
  
  By default, the builder makes the system (global) site-packages dir
  *un*available to the created environment.
  
  If invoked using the Python -m option, the default is to use copying
  on Windows platforms but symlinks elsewhere. If instantiated some
  other way, the default is to *not* use symlinks.
  
  :param system_site_packages: If True, the system (global) site-packages
                               dir is available to created environments.
  :param clear: If True, delete the contents of the environment directory if
                it already exists, before environment creation.
  :param symlinks: If True, attempt to symlink rather than copy files into
                   virtual environment.
  :param upgrade: If True, upgrade an existing virtual environment.
  :param with_pip: If True, ensure pip is installed in the virtual
                   environment
  :param prompt: Alternative terminal prefix for the environment.
  :param upgrade_deps: Update the base venv modules to the latest on PyPI
  :param scm_ignore_files: Create ignore files for the SCMs specified by the
                           iterable.
docstr: Create a .gitignore file in the environment directory.
  
  The contents of the file cause the entire environment directory to be
  ignored by git.
docstr_tok: ["Create","a",".gitignore","file","in","the","environment","directory",".","The","contents","of","the","file","cause","the","entire","environment","directory","to","be","ignored","by","git","."]
code: def create_git_ignore_file(self, context):
      """
      Create a .gitignore file in the environment directory.
  
      The contents of the file cause the entire environment directory to be
      ignored by git.
      """
      gitignore_path = os.path.join(context.env_dir, ".gitignore")
      with open(gitignore_path, "w", encoding="utf-8") as file:
          file.write(
              "# Created by venv; "
              "see https://docs.python.org/3/library/venv.html\n"
          )
          file.write("*\n")
  
imports: import logging
  import os
  import shutil
  import subprocess
  import sys
  import sysconfig
  import types
label_desc: Use image node_id 7 for calling the EnvBuilder obj's underlying member method code with example usage: obj.create_git_ignore_file(context) without return types