Problems installing ruff and sqlfluff

[grifferz]

I keep my neovim config synced between hosts. I started doing some Python work on one host so did MasonInstall and got ruff. Now on another host at every start of neovim I get an error about failing to install ruff.

Here is the error

[INFO Thu 31 Oct 2024 21:48:28 UTC] ...e/nvim/lazy/mason.nvim/lua/mason-core/installer/init.lua:184:                   Executing installer for Package(name=sqlfluff) {}                                                              
[INFO Thu 31 Oct 2024 21:48:28 UTC] ...e/nvim/lazy/mason.nvim/lua/mason-core/installer/init.lua:184:                   Executing installer for Package(name=ruff) {}                                                                  
[ERROR Thu 31 Oct 2024 21:48:28 UTC] ...e/nvim/lazy/mason.nvim/lua/mason-core/installer/init.lua:249:                   Installation failed for Package(name=ruff) error=spawn: python3 failed with exit code 1 and signal 0.·         
[ERROR Thu 31 Oct 2024 21:48:28 UTC] ...e/nvim/lazy/mason.nvim/lua/mason-core/installer/init.lua:249:                   Installation failed for Package(name=sqlfluff) error=spawn: python3 failed with exit code 1 and signal 0.

I am able to pip install sqlfluff (and same for ruff) on that system both for my user and system wide with sudo. Is there a way to get more information on what is failing for Mason exactly?

[Gentil-N]

Hi @grifferz,
While using Lazyvim, I faced the same issue for ruff and solved it this way:

1. Type :MasonInstall ruff
2. Pull down the menu associated to ruff and look at the error message. For me, the package "virtual environment" was missing.
3. Only for Ubuntu environments Enter in a terminal sudo apt install python3-venv
4. Restart nvim and enter :MasonInstall ruff again.

Not sure if all the steps are necessary as I am a newbie in neovim but it worked. Good luck!

[grifferz]

Thank you so much! For me also it wanted sudo apt install python3-venv.

[thomasrpo03]

Thanks a lot! i had the same issue

[geovannewashington]

You are my hero

[sigurdpl]

same probably for me on ubuntu vm. Missing python virtual environment.

[eric-burel]

Hi, still digging this issue when installing Python with "uv", python3-venv was installed. Error is ['/home/eric-burel/.local/share/nvim/mason/packages/ruff/venv/bin/python3', '-m', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1 so I guess this is a similar issue though, pip is not found somehow. It seems I must fix this error first : python -m ensurepip # error: externally-managed-environment. Edit: tracked here astral-sh/uv#18204