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vim-and-neovim.md

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VIM/Neovim

Install VIM/Neovim.

MacOS

brew install vim
# and/or
brew install neovim

Linux gurus, you know what to do :).

What? Windows? Sorry bud.

Vim Plug

Vim Plug is a minimalist VIM plugin manager. I choose to use it mainly because of the expressiveness of the plugin config, which is easy to share and for others to replicate.

Install Vim Plug:

# For VIM
curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

# For Neovim
sh -c 'curl -fLo "${XDG_DATA_HOME:-$HOME/.local/share}"/nvim/site/autoload/plug.vim --create-dirs \
       https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'

For Neovim, put the following plugin config in ~/.config/nvim/init.vim

call plug#begin("~/.config/nvim/plugged")
" Plugin Section
 Plug 'dracula/vim', {'as': 'dracula'}
 Plug 'folke/tokyonight.nvim', { 'branch': 'main' }
 Plug 'EdenEast/nightfox.nvim'
 Plug 'ryanoasis/vim-devicons'
 Plug 'SirVer/ultisnips'
 Plug 'honza/vim-snippets'
 Plug 'scrooloose/nerdtree'
 Plug 'PhilRunninger/nerdtree-visual-selection'
 Plug 'preservim/nerdcommenter' | Plug 'Xuyuanp/nerdtree-git-plugin'
 Plug 'mhinz/vim-startify'
 Plug 'neoclide/coc.nvim', {'branch': 'release'}
 Plug 'neovimhaskell/haskell-vim'
 Plug 'ctrlpvim/ctrlp.vim'
 Plug 'tpope/vim-fugitive'
 Plug 'alx741/vim-stylishask'
 Plug 'alx741/vim-hindent'
 Plug 'vim-airline/vim-airline'
 Plug 'vim-airline/vim-airline-themes'
 Plug 'chrisbra/csv.vim'
 " For Hoogle
 Plug 'junegunn/fzf', {'dir': '~/.fzf', 'do': './install --all'}
 Plug 'monkoose/fzf-hoogle.vim'

call plug#end()

For VIM, simply put the above in ~/.vimrc and replace ~/.config/nvim/plugged by ~/.vim/plugged in the first line.

Enter vim or nvim and run the following to install all the plugins defined above:

:PlugInstall

CoC

For specific language support in CoC, refer to the list of CoC extensions.

Configure CoC for Haskell

In vim or nvim, run :CocConfig and add the following Haskell-related config:

{
  "languageserver": {
    "haskell": {
      "command": "haskell-language-server-wrapper",
      "args": [
        "--lsp"
      ],
      "rootPatterns": [
        ".stack.yaml",
        "*.cabal",
        "cabal.config",
        "package.yaml",
        ".hie-bios",
        "hie.yaml",
        "BUILD.bazel"
      ],
      "filetypes": [
        "hs",
        "lhs",
        "haskell"
      ],
      "initializationOptions": {
        "languageServerHaskell": {
          "hlintOn": true,
          "maxNumberOfProblems": 10,
          "completionSnippetsOn": true
        }
      }
    }
  },
  "suggest.disableKind": true,
  "suggest.snippetsSupport": false,
  "suggest.echodocSupport": true,
  "suggest.maxCompleteItemCount": 20,
  "coc.preferences.formatOnType": true,
  "coc.preferences.formatOnSaveFiletypes": [
    "haskell",
    "json"
  ],
  "coc.preferences.enableMarkdown": true,
  "coc.preferences.jumpCommand": "tab drop",
  "codeLens.enable": true,
  "diagnostic.virtualText": true,
  "diagnostic.virtualTextCurrentLineOnly": false,
  "diagnostic.virtualTextLines": 1,
  "diagnostic.virtualTextPrefix": " —— ",
  "diagnostic.errorSign": "•",
  "diagnostic.warningSign": "•",
  "diagnostic.infoSign": "•"
}

Misc

Choose a good colorscheme. This is very important as colour scheme can either make your code easy to read, or make your life miserable.

Example Neovim config

My Neovim config can be found here.