To open a file relative to the current one in Helix, you can to the do the following with 24.3:

:o <C-r>%<C-w>

Here, the Control-R allows you to select a register and the special register "%" contains the current file path and inserts into the command line, while the final Control-w chops off the last part of the file name leaving with you current directory.

This is like :o %:h from Vim/Neovim

See Helix wiki for config details

Hi!

I am trying to set up arduino autocompletion and syntax highlighting. I followed some of the instuctions in an issue on the github adding that to my own common sense, and it mostly overlaps now. But the syntaxhighlighting is still not there, and neither is autocompletion.

My ~/.config/helix tree looks like this now:

.
├── config.toml
├── languages.toml
├── runtime
│  └── queries
│     ├── arduino
│     │  ├── folds.scm
│     │  ├── highlights.scm
│     │  ├── indents.scm
│     │  ├── injections.scm
│     │  └── locals.scm
│     └── cpp
│        ├── folds.scm
│        ├── highlights.scm
│        ├── indents.scm
│        ├── injections.scm
│        └── locals.scm
└── themes
   └── molokai-edit.toml

and the relevant content (I removed some markdown stuff for this post) of languages.toml:

[language-server.arduino]
command = "./arduino-language-server" 
args=["-clangd","/usr/local/bin/clangd","-cli","/usr/local/bin/arduino-cli","-cli-config","~/.arduino15/arduino-cli.yaml","-fqbn","arduino:avr:uno"]

[[grammar]]
name = "cpp"
source = { git = "https://github.com/tree-sitter/tree-sitter-cpp", rev = "a90f170f92d5d70e7c2d4183c146e61ba5f3a457" }

[[grammar]]
name = "arduino"
source = { git = "https://github.com/ObserverOfTime/tree-sitter-arduino", rev = "db929fc6822b9b9e1211678d508f187894ce0345"}

# [...] < here was some config for markdown

[[language]]
name = "arduino"
scope="source.arduino"
file-types=[ "ino" ]
language-servers=[ "arduino" ]
injection-regex = "arduino"
comment-token = "//"
roots=["sketch.yaml"]

I also installed the packages arduino-language-server (with dep clangd) and arduino-cli from the arch repos.

I just remembered: I am using the helix-ext AUR package (which means I am still on 23.10.2), to be able to use the file tree on the left. here is the repo. Could that be the issue?

I have no idea anymore what I am doing wrong, could anyone tell me? If you need more information to help, just ask for it.

addition (14-4-24):
As I switched to nvim (lack of features in helix), I am not interested in setting this up anymore. Thanks!

Mostly internal changes this time

New helix version was released 12 minutes ago with new features:

• multiple language servers
• fuzzy matching with nucleo (nucleo is a project from creators of helix and is significantly faster than alternatives like fzf)
• smart tab
• better registers
• initial support for LSP DidChangeWatchedFiles
• syntax highlight regex prompts

I've started using Helix occasionally as I stumbled across the editor when trying to customize vim for Rust.

Immediately, I fell in love with how (mostly) plug and play Helix is.

Over the next few months, I plan to use Helix more and more. If you have any useful tips on usage, customization or anything else I am all ears.

Consider posting to the existing one?

Nucleo is a project from creators of helix and is significantly faster that alternatives like fzf.

If you want to use latest features, such as this one, check out helix-git AUR package. (if you are using arch btw)

I found this nice project on GitHub: DJAndries/llmvm. It doesn't seem to work as seamless as GitHub Copilot in JetBrains Rider or VSCode, for example, but since there is no plugin system yet, it's a nice option.