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Dhruv Manilawala 2e77b775b0 Consider `--preview` flag for `server` subcommand (#12208 ) ## Summary This PR removes the requirement of `--preview` flag to run the `ruff server` and instead considers it to be an indicator to turn on preview mode for the linter and the formatter. resolves: #12161 ## Test Plan Add test cases to assert the `preview` value is updated accordingly. In an editor context, I used the local `ruff` executable in Neovim with the `--preview` flag and verified that the preview-only violations are being highlighted. Running with: ```lua require('lspconfig').ruff.setup({ cmd = { '/Users/dhruv/work/astral/ruff/target/debug/ruff', 'server', '--preview', }, }) ``` The screenshot shows that `E502` is highlighted with the below config in `pyproject.toml`: <img width="877" alt="Screenshot 2024-07-17 at 16 43 09" src="https://github.com/user-attachments/assets/c7016ef3-55b1-4a14-bbd3-a07b1bcdd323">	2024-07-18 11:05:01 +05:30
..
fixtures	Consider `--preview` flag for `server` subcommand (#12208 )	2024-07-18 11:05:01 +05:30

Dhruv Manilawala 2e77b775b0

Consider --preview flag for server subcommand (#12208 )

## Summary

This PR removes the requirement of `--preview` flag to run the `ruff
server` and instead considers it to be an indicator to turn on preview
mode for the linter and the formatter.

resolves: #12161 

## Test Plan

Add test cases to assert the `preview` value is updated accordingly.

In an editor context, I used the local `ruff` executable in Neovim with
the `--preview` flag and verified that the preview-only violations are
being highlighted.

Running with:
```lua
require('lspconfig').ruff.setup({
  cmd = {
    '/Users/dhruv/work/astral/ruff/target/debug/ruff',
    'server',
    '--preview',
  },
})
```
The screenshot shows that `E502` is highlighted with the below config in
`pyproject.toml`:

<img width="877" alt="Screenshot 2024-07-17 at 16 43 09"
src="https://github.com/user-attachments/assets/c7016ef3-55b1-4a14-bbd3-a07b1bcdd323">

2024-07-18 11:05:01 +05:30

fixtures Consider --preview flag for server subcommand (#12208 ) 2024-07-18 11:05:01 +05:30