dotfiles/coc-settings.json

{
    "languageserver": {
        "rust": {
            "command": "rustup",
            "args": ["run", "stable", "rust-analyzer"],
            "filetypes": ["rust"],
            "rootPatterns": ["Cargo.toml"]
        },
        "elmLS": {
            "command": "elm-language-server",
            "filetypes": ["elm"],
            "rootPatterns": ["elm.json"]
        }
    }
}