code: def check_git_ls_files():
      """Checks Git for a specific ls-files behavior.
  
      As of 2.32 the behavior of the command:
  
          git ls-files -ioc --exclude-standard --directory
  
      includes directories that should be ignored when all of their
      contained files are ignored. This appears to be an optimization in
      the generated output for this command. Guild takes advantage of
      this by excluding these directories from its source code copy
      rules so as not to travse their files.
  
      Older versions of Git, however, behave differently -- they omit
      such directories *and the ignored files in them* from the command
      output. If relied on, this behavior results in Guild missing
      ignored files in its inferred source code select rules.
  
      This function is used to explicitly test the behavior Git on the
      system. It relies on the system PATH to locate the `git`
      executable by default. User can provide an explicit Git executable
      in user config under `git.executable`.
  
      Returns an instance of `GitCheckResult`. If the expected behavior
      of Git is incorrect, the result error is specified in the `error`
      attribute.
  
      """
      result = GitCheckResult()
      result.git_version = git_version()
      result.git_exe = util.which(_git_exe.read())
      project_dir = _init_git_ls_files_sample_project()
      result.out = subprocess.check_output(
          [
              result.git_exe,
              "ls-files",
              "-ioc",
              "--exclude-standard",
              "--directory",
          ],
          cwd=project_dir,
      )
      if result.out != b"files/\nfiles/foo.txt\n":
          result.error = (
              "unexpected output for ls-files:\n"
              + result.out.decode().rstrip()
          )
      return result
  
imports: import collections
  import logging
  import re
  import os
  import subprocess
  from guild import config
  from guild import file_util
  from guild import util
  from guild.file_util import FileSelectRule
label_desc: Use image node_id 29 for calling a global function with example usage: check_git_ls_files() and returns: result