Helix setup?

[TornaxO7]

Did anyone succeed to set this up for helix? If yes, could you please share your config?

[pr2502]

I'm using it with helix myself, does the example config not work?

Edit: Oh, it looks like the example config for helix is way outdated. I'll have to fix that, sorry.

My ~/.config/helix/languages.toml has this bit in it:

[language-server.rust-analyzer]
args = ["client", "--server-path", "rust-analyzer"]
command = "/nix/store/sfl5jyc488kfmczpa5x68xvp4rq7sgin-ra-multiplex-0.2.4-git/bin/ra-multiplex"

My ~/.config/ra-multiplex/config.toml has these lines in it:

connect = "/home/user/.cache/ra-mux/ra-mux.sock"
listen = "/home/user/.cache/ra-mux/ra-mux.sock"
pass_environment = ["PATH"]

And I have a user service systemctl --user cat ra-mux like this:

# /home/user/.config/systemd/user/ra-mux.service
[Install]
WantedBy=default.target

[Service]
ExecStart=/nix/store/sfl5jyc488kfmczpa5x68xvp4rq7sgin-ra-multiplex-0.2.4-git/bin/ra-multiplex server
ExecStartPre=/nix/store/vb8mdklw65p9wikp97ybmnyay0xzipx3-coreutils-9.5/bin/install -d -m0700 /home/user/.cache/ra-mux
Type=simple

[Unit]
Description=Rust analyzer multiplex server

Entering any shell environment that has rust-analyzer in PATH (like ra-multiplexs own repo) works as expected.

This is on nixos with no rust-analyzer or rustc installed globally, only per-project shells. You can make it easier with a more traditional distro. Without the PATH passing, pointing the service to the single rust-analyzer with an absolute path.

[TornaxO7]

Oh perfect! You are using NixOs as well :D (or at least nix).

I found the issue:
It was exactly this:

pass_environment = ["PATH"]

ra-multiplex couldn't find rust-analyzer in my PATH that's why it always failed.

[TornaxO7]

May I ask if you are using home-manager or something like this? May I ask if I can get a little glimpse into your home-manager-config or how you set it up in your nix config?

[pr2502]

Sure! I'm using NixOS and home-manager^^ my whole config is public, the helix module is here https://git.p2502.net/max/nixconf/src/branch/main/modules/home/helix.nix, and ra-multiplex is enabled on my laptop here https://git.p2502.net/max/nixconf/src/branch/main/hosts/litchi/home.nix#L36.