file-contents-sorter adds an extra blank line if the file to be sorted is empty

[paduszyk]

I am on v.4.4.0, Python 3.11.4, macOS Ventura 13.4.1.

My .pre-commit-config.yaml:

repos:
  - repo: https://github.com/pre-commit/pre-commit-hooks
    rev: "v4.4.0"
    hooks:
      - id: end-of-file-fixer
      - id: file-contents-sorter
        files: ^requirements\/.+\.in$
        # args: [--unique, --ignore-case]

The files are intentionally empty – I'm in the planning stage, they are just placeholders for requriements¹.

To the point: file-contents-sorter adds an extra blank to them, what results in a confict with end-of-file-fixer. I am not sure if that is the expected behavior... Updating args doesn't have any effect.

$ git:(install-and-configure-pre-commit) : pre-commit run --all-files
fix end of files.........................................................Failed
- hook id: end-of-file-fixer
- exit code: 1
- files were modified by this hook

Fixing requirements/build.in
Fixing requirements/lint.in
Fixing requirements/test.in

file contents sorter.....................................................Failed
- hook id: file-contents-sorter
- exit code: 1
- files were modified by this hook

Sorting requirements/build.in
Sorting requirements/lint.in
Sorting requirements/test.in

Footnotes

1. Yes, I know that I can use requirements-txt-fixer particularly for requirements. 😄 I will do. For that issue it doesn't matter. ↩