Setup Neovim using a NixOS Docker container.

01_nixos_vim_container.md

Neovim IDE

Neovim IDE in a NixOS Docker Container

docker run --volumes-from=nix -it \
    -v $(pwd):/home \
    -w /home \
    --name <change-me> \
    -p 9005:9005 \
    -p 3000:3000 \
    -p 3001:3001 \
    -p 8080:8080 \
    -p 8000:8000 \
    -p 8545:8545 \
    -p 9545:9545 \
    nixos/nix nix-shell /home/.config/nvim.nix

docker run --volumes-from=nix \
        -it -v $(pwd):/app \
        -w /app --name <change-me> \
        nixos/nix nix-shell /home/nvim.nix

• Starts an interactive session in a NixOS Docker container.
• The nix data container is used to shared persistent /nix for all Nix containers.
• Creates a volume wich mounts the current working directory to the /app directory in the container.

NOTES

• F3 Key Runs Autoformat on selected range of lines.
• Gitgutter shows changes on left gutter of open file. + = new, - = modified.

LINKS

• ToiletHill.io Additional Notes & Info
• NixOS
• NixOS Vim Wiki
• Neovim
• Setting Up Vim Post
• Docker

02_nvim.nix

let 
  init_vim = import ./init_vim.nix rec { pkgs = pkgs; };
in

with import <nixpkgs> {
  config = {
    packageOverrides = pkgs : with pkgs; {
      myNeovim = neovim.override {
        configure = {

          customRC = init_vim.config;

          plug.plugins = with pkgs.vimPlugins; [
            nerdtree
            nerdtree-git-plugin
            vim-airline
            vim-airline-themes
            vim-autoformat
            auto-pairs
            youcompleteme
            vim-gitgutter
            haskell-vim
            neco-ghc
            rust-vim
            auto-pairs
            vim-flake8
            vim-yapf
            vim-surround
            vim-jsbeautify
            typescript-vim
            vim-nix
            vim-solidity
          ];

        }; 
      };
    };
  };
};

let
  pythonEnv = python37.withPackages (ps: [
    ps.setuptools
    ps.pip
    ps.pyyaml
    ps.pynvim
    ps.msgpack
    ps.pyopenssl
  ]);
in
stdenv.mkDerivation rec {
  name = "neovim";

  buildInputs = [
    git
    libcap
    go
    gcc
    rustc
    cargo
    nodejs
    ghc
    cabal-install
    solc
    pythonEnv
    powerline-fonts
    powerline-go
    ruby
    xsel
    xclip
    locale
    myNeovim
  ];
  shellHook = ''
    export LANG=UTF-8
    export LANG=en_US.UTF-8

    # Set DISPALY env for xclip
    export DISPLAY=:0
    npm i -g neovim
    cp .config/.bashrc /root/.bashrc
    source /root/.bashrc
  '';
}

03_init_vim.nix

{pkgs}:
{
  config = ''
    " NERDTree Settings
    autocmd vimenter * NERDTree
    " Toggle
    map <C-n> :NERDTreeToggle<CR>
    :imap <C-j> <Esc>
    " enable line numbers
    let NERDTreeShowLineNumbers=1

    " Autoformat Settings
    noremap <F3> :Autoformat<CR>

    " git Settings
    autocmd Filetype gitcommit setlocal spell textwidth=72

    " Haskell
    " Disable haskell-vim omnifunc
    let g:haskellmode_completion_ghc=0
    autocmd FileType haskell setlocal omnifunc=necoghc#omnifunc
    " YCM integration
    let g:ycm_semantic_triggers={'haskell' : ['.']}
    "Show detailed information (type) of symbols.
    let g:necoghc_enable_detailed_browse=1

    " Nodejs"
    let g:loaded_node_provider=1
    let g:node_host_prog='/nix/store/98fqirs1dkvm240kn72jj1s2ifd5xx3y-nodejs-10.16.3/bin/neovim-node-host'

    " indents files according to filetype
    filetype plugin indent on

    " enable syntax highlighting
    syntax enable

    " show line numbers
    set number

    " set tabs to have 4 spaces
    set ts=4

    " indent when moving to the next line while writing code
    set autoindent

    " expand tabs into spaces
    set expandtab

    " when using the >> or << commands, shift lines by 4 spaces
    set shiftwidth=4

    " show the matching part of the pair for [] {} and ()
    set showmatch

    " enable all Python syntax highlighting features
    let python_highlight_all=1

    " Enable JsBeautify
    autocmd FileType javascript noremap <buffer>  <c-f> :call JsBeautify()<cr>
    autocmd FileType json noremap <buffer> <c-f> :call JsonBeautify()<cr>
    autocmd FileType jsx noremap <buffer> <c-f> :call JsxBeautify()<cr>
    autocmd FileType html noremap <buffer> <c-f> :call HtmlBeautify()<cr>
    autocmd FileType css noremap <buffer> <c-f> :call CSSBeautify()<cr>

    " Vim-Airline
    " List of themes here:
    " $HOME/.local/share/nvim/plugged/vim-airline-themes/doc/airline-themes.txt
    let g:airline#extensions#tabline#enabled=1
    let g:airline_theme='laederon' " 'papercolor'

    if !exists('g:airline_symbols')
      let g:airline_symbols={}
    endif
    let g:airline_symbols.space="\ua0"

    " unicode symbols
    let g:airline_left_sep='»'
    let g:airline_left_sep=''
    let g:airline_right_sep='«'
    let g:airline_right_sep=''
    let g:airline_symbols.crypt='🔒'
    let g:airline_symbols.linenr='☰'
    let g:airline_symbols.linenr='␊'
    let g:airline_symbols.linenr='␤'
    let g:airline_symbols.linenr='¶'
    let g:airline_symbols.maxlinenr=' '
    let g:airline_symbols.maxlinenr='㏑'
    let g:airline_symbols.branch='⎇'
    let g:airline_symbols.paste='ρ'
    let g:airline_symbols.paste='Þ'
    let g:airline_symbols.paste='∥'
    let g:airline_symbols.spell='Ꞩ'
    let g:airline_symbols.notexists='∄'
    let g:airline_symbols.whitespace='Ξ'

    " powerline symbols
    let g:airline_left_sep=''
    let g:airline_left_alt_sep=''
    let g:airline_right_sep=''
    let g:airline_right_alt_sep=''
    let g:airline_symbols.branch=''
    let g:airline_symbols.readonly=''
    let g:airline_symbols.linenr='☰'
    let g:airline_symbols.maxlinenr=''

    " Set Spell
    :nmap <F8> :setlocal spell spelllang=en_us<CR>
    :nmap <F9> :set nospell<CR>
    :nmap <F7> :echo 'Hi Heath'<CR>

    " set Vertical Column color at 80 chars
    set colorcolumn=89

    " show a visual line under the cursor's current line
    highlight Cursor guifg=white guibg=black
    highlight iCursor guifg=white guibg=steelblue
    set guicursor=n-v-c:block-Cursor
    set guicursor+=i:ver100-iCursor
    set guicursor+=n-v-c:blinkon0
    set guicursor+=i:blinkwait10
    set cursorline
    :hi CursorLine cterm=NONE ctermbg=25 guibg=darkblue ctermfg=4 guifg=white  
    :hi CursorColumn cterm=NONE ctermfg=4 ctermbg=25  guibg=darkblue guifg=white
    :nnoremap <Leader>c :set cursorline! cursorcolumn!<CR>

    " gitgutter
    let g:gitgutter_terminal_reports_focus=1
    let g:gitgutter_enabled=1
    let g:gitgutter_signs=1
    let g:gitgutter_highlight_lines=1
    let g:gitgutter_highlight_linenrs=1
  '';
}

04_bashrc

POWGO=$(which powerline-go)

function _update_ps1() {
    PS1="$($POWGO -error $?)"
}

if [ "$TERM" != "linux" ] && [ -f "$POWGO" ]; then
    PROMPT_COMMAND="_update_ps1; $PROMPT_COMMAND"
fi

# Workaround for nix-shell --pure
if [ "$IN_NIX_SHELL" == "pure" ]; then
    if [ -x "$HOME/.nix-profile/bin/powerline-go" ]; then
        alias powerline-go="$HOME/.nix-profile/bin/powerline-go"
    elif [ -x $POWGO ]; then
        alias powerline-go=$POWGO
    fi
fi