end-of-file-fixer add always a new line for .gitignore files

describe your issue

After running pre-commit hook end-of-file-fixer it always add a new line for every .gitignore file in our private repo. Subsequently, our job checker always fails after run --all-files trying to fixes those files.

pre-commit --version

pre-commit 2.16.0

.pre-commit-config.yaml

repos:
  - repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v4.1.0
    hooks:
      - id: end-of-file-fixer
      - id: trailing-whitespace
      - id: check-yaml
      - id: check-json

~/.cache/pre-commit/pre-commit.log (if present)

error information

An unexpected error has occurred: CalledProcessError: command: ('/usr/bin/git', '-c', 'submodule.recurse=0', 'checkout', '--', '.')
return code: 2
expected return code: 0
stdout: (none)
stderr:
    
    This repository is configured for Git LFS but 'git-lfs' was not found on your path. If you no longer wish to use Git LFS, remove this hook by deleting .git/hooks/post-checkout.
    
    

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/error_handler.py", line 65, in error_handler
    yield
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/main.py", line 396, in main
    return run(args.config, store, args)
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/commands/run.py", line 399, in run
    exit_stack.enter_context(staged_files_only(store.directory))
  File "/usr/lib/python3.8/contextlib.py", line 425, in enter_context
    result = _cm_type.__enter__(cm)
  File "/usr/lib/python3.8/contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/staged_files_only.py", line 98, in staged_files_only
    with _intent_to_add_cleared(), _unstaged_changes_cleared(patch_dir):
  File "/usr/lib/python3.8/contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/staged_files_only.py", line 67, in _unstaged_changes_cleared
    cmd_output_b(*_CHECKOUT_CMD, env=no_checkout_env)
  File "/usr/local/lib/python3.8/dist-packages/pre_commit/util.py", line 154, in cmd_output_b
    raise CalledProcessError(returncode, cmd, retcode, stdout_b, stderr_b)
pre_commit.util.CalledProcessError: command: ('/usr/bin/git', '-c', 'submodule.recurse=0', 'checkout', '--', '.')
return code: 2
expected return code: 0
stdout: (none)
stderr:
    
    This repository is configured for Git LFS but 'git-lfs' was not found on your path. If you no longer wish to use Git LFS, remove this 

[asottile]

can you show the actual contents? perhaps add --show-diff-on-failure ?

[edgarriba]

I’ll do — thanks in any case for your help.