Conflicting behavior of ruff isort rule for same file in different environments

[rashishhume]

Description

I've noticed that ruff linter with isort enabled is behaving differently for me when running locally (in a Linux machine with Ubuntu) vs in a Github action runner (running ubuntu-latest).

Locally, its not happy about the lack of line between yaml and RcloneHelper.

$ ruff check --config ./pyproject.toml ./backup.py
backup2.py:5:1: I001 [*] Import block is un-sorted or un-formatted
   |
 3 |   """
 4 |
 5 | / import logging
 6 | | import os
 7 | | from typing import Annotated, List
 8 | |
 9 | | import typer
10 | | import yaml
11 | | from data_backup.rclone_helper import RcloneHelper
   | |__________________________________________________^ I001
12 |
13 |   logging.basicConfig(
   |
   = help: Organize imports

Found 1 error.

In a Github action runner its not happy with a line (ran below via tmate ssh session in the runner)

$ ruff check --config ./tools/data-backup/pyproject.toml ./tools/data-backup/backup.py
tools/data-backup/backup.py:5:1: I001 [*] Import block is un-sorted or un-formatted
   |
 3 |   """
 4 |
 5 | / import logging
 6 | | import os
 7 | | from typing import Annotated, List
 8 | |
 9 | | import typer
10 | | import yaml
11 | |
12 | | from data_backup.rclone_helper import RcloneHelper
   | |__________________________________________________^ I001
13 |
14 |   logging.basicConfig(
   |
   = help: Organize imports

Found 1 error.

My pyproject.toml is:

[tool.ruff]
line-length = 120
indent-width = 4

[tool.ruff.lint]
ignore = ["E203", "E501"]
extend-select = ["I"]

Any thoughts on what might be the issue here ?

[MichaReiser]

The reason for the difference seems to be that Ruff once categorizes data_backup as first party (locally) and as third-party (GitHub) dependencies and it then tries to group it with the other first/third-party imports. You can run ruff with ruff check --verbose and it should log how imports are categorizes.

Now, the reason why I think Ruff once detects data_backup as first-party locally but not on GitHub is because you run ruff from different directories. Ruff defaults to treat ./ and ./src as first-party and everything else as third-party (see src.

Can you try running ruff in the tools/data-backup directory on GitHub, the same as you do locally and let me know if that helped?

[rashishhume]

Thanks @MichaReiser. That might be right. I tried changing the dir locally, and I see the same error as Github

$ ruff check --config ./research/tools/data-backup/pyproject.toml ./research/tools/data-backup/backup2.py
research/tools/data-backup/backup2.py:5:1: I001 [*] Import block is un-sorted or un-formatted
   |
 3 |   """
 4 |
 5 | / import logging
 6 | | import os
 7 | | from typing import Annotated, List
 8 | |
 9 | | import typer
10 | | import yaml
11 | |
12 | | from data_backup.rclone_helper import RcloneHelper
   | |__________________________________________________^ I001
13 |
14 |   logging.basicConfig(
   |
   = help: Organize imports

Found 1 error.
[*] 1 fixable with the `--fix` option.

[rashishhume]

I was able to fix it by simply omitting the --config argument when invoking it in Github