"set-language" for all files with extension ".whatever" or name matching "whatever"

[helmesjo]

Hi! Maybe there already is an easy way to do this and I've just missed it.

I'd like to specify in (preferably) my config.toml that a specific file extension (or in my case, files named buildfile) be highlighted using existing highlighting for another language (bash in this case).
Currently I can do this on a per buffer basis (using set-language bash), but I'd like helix to do this automatically for any file opened that's named buildfile or ends with .buildfile. Is this possible?

Thanks!

[the-mikedavis]

You can create a custom languages.toml config that overrides the file-types for bash to include buildfile https://docs.helix-editor.com/master/languages.html

# ~/.config/helix/languages.toml
[[language]]
name = "bash"
file-types = ["sh", "bash", "zsh", ".bash_login", ".bash_logout", ".bash_profile", ".bashrc", ".profile", ".zshenv", ".zlogin", ".zlogout", ".zprofile", ".zshrc", "APKBUILD", "PKGBUILD", "eclass", "ebuild", "bazelrc", "buildfile"]

[helmesjo]

@the-mikedavis Ah great, thanks! But as you mention, then it overrides so I need to make sure to list all file-types? I can't "append" so to say?

[the-mikedavis]

Yep correct

[helmesjo]

One note that threw me off a bit: config-reload was not enough after adding the languages.toml (maybe I should've done regular buffer reload?). I had to restart helix for it to take effect.

[edrozenberg]

I can't "append" so to say?

Same, wish I could add an extension to some lang def. For ex. I want to add the .csh extension to bash (even if imperfect) because otherwise there's no highlighting for .csh files at all. As it is I'd need to copy and modify the existing 50+ line bash definition in https://github.com/helix-editor/helix/blob/master/languages.toml to my own config file. And if the original source definition ever changes, there's no way to keep track of it. Not a great solution so I won't do this, simpler to just manually change the language with :set-language every time I open one of these files. It would be far better if I could just say in my own config "use the bash def with anything ending in .csh".