nixos-config/configurations/neovim/default.nix

{ pkgs, ... }:
let
  customPlugins = {
    snow-color-theme = pkgs.vimUtils.buildVimPlugin {
      name = "snow";
      src = pkgs.fetchFromGitHub {
        owner = "nightsense";
        repo = "snow";
        rev = "f9800e987e404efed4748fe8098e04ddbec9770b";
        sha256 = "099fky1bpppac5785bhx1jc26gfpm8n837p8487j1rf1lwq83q33";
      };
    };
    kotlin-vim = pkgs.vimUtils.buildVimPlugin {
      name = "kotlin-vim";
      src = pkgs.fetchFromGitHub {
        owner = "udalov";
        repo = "kotlin-vim";
        rev = "b9fa728701a0aa0b9a2ffe92f10880348fc27a8f";
        sha256 = "1yqzxabhpc4jbdlzhsysp0vi1ayqg0vnpysvx4ynd9961q2fk3sz";
      };
    };
  };
  jdtls = import ../../packages/jdtls/default.nix { inherit pkgs; stdenv = pkgs.stdenv; };
  kotlinls = import ../../packages/kotlin-language-server/default.nix { inherit pkgs; };
  nodePackages = import ../../packages/node/default.nix { inherit pkgs; };
in
{
  home-manager.users.charlotte = { pkgs, ... }: {
    home.packages = [
      (
        pkgs.neovim.override {
          configure = {
            customRC = ''
              set autoread
              "" Theming

              set termguicolors
              set background=light
              colorscheme snow

              "" General settings

              " Undo over sessions
              set undofile
              set undodir=~/.cache/nvimundo

              " Automatically save sessions on exit and load them on start
              function! MakeSession()
                let b:sessiondir = $HOME . "/.config/nvim/sessions" . getcwd()
                if (filewritable(b:sessiondir) != 2)
                  exe 'silent !mkdir -p ' b:sessiondir
                  redraw!
                endif
                let b:filename = b:sessiondir . '/session.vim'
                exe "mksession! " . b:filename
              endfunction

              function! LoadSession()
                let b:sessiondir = $HOME . "/.config/nvim/sessions" . getcwd()
                let b:sessionfile = b:sessiondir . "/session.vim"
                if (filereadable(b:sessionfile))
                  exe 'source ' b:sessionfile
                else
                  echo "No session loaded."
                endif
              endfunction
              if(argc() == 0)
                au VimEnter * nested :call LoadSession()
                au VimLeave * :call MakeSession()
              endif

              "" Filetype configuration

              " Base settings for all files

              syntax enable
              set number
              set showcmd
              set scrolloff=8
              set expandtab
              set tabstop=4
              set shiftwidth=4
              set linebreak

              set list
              set listchars=tab:·\ ,trail:·
              set inccommand=split
              set clipboard=unnamedplus

              filetype plugin indent on

              "" Fuzzy search in vim

              function! s:completedFiles(winid, filename, ...) abort
                bdelete!
                call win_gotoid(a:winid)
                if filereadable(a:filename)
                  let lines = readfile(a:filename)
                  if !empty(lines)
                    exe ':e ' . lines[0]
                  endif
                  call delete(a:filename)
                endif
              endfunction

              function! FzyFiles()
                let file = tempname()
                let winid = win_getid()
                let cmd = split(&shell) + split(&shellcmdflag) + ["${pkgs.ripgrep.out}/bin/rg --files --hidden -g '!/.git' --smart-case | ${pkgs.fzy.out}/bin/fzy > " . file]
                let F = function('s:completedFiles', [winid, file])
                botright 10 new
                call termopen(cmd, {'on_exit': F})
                startinsert
              endfunction

              function! s:completedGrep(winid, filename, ...) abort
                bdelete!
                call win_gotoid(a:winid)
                if filereadable(a:filename)
                  let lines = readfile(a:filename)
                  if !empty(lines)
                    let list = split(lines[0], ':')
                    let file = list[0]
                    let line = list[1]
                    exe ':e ' . file
                    exe line
                  endif
                  call delete(a:filename)
                endif
              endfunction

              function! FzyGrep()
                let file = tempname()
                let winid = win_getid()
                let cmd = split(&shell) + split(&shellcmdflag) + ["${pkgs.ripgrep.out}/bin/rg --vimgrep --hidden -g '!/.git' '^' | ${pkgs.fzy.out}/bin/fzy > " . file]
                let F = function('s:completedGrep', [winid, file])
                botright 10 new
                call termopen(cmd, {'on_exit': F})
                startinsert
              endfunction

              nnoremap <C-f> :call FzyFiles()<CR>
              nnoremap <C-g> :call FzyGrep()<CR>

              "" Plugin configuration
              let g:ale_fixers = { '*': ['remove_trailing_lines', 'trim_whitespace'] }
              let g:ale_fix_on_save = 1

              let g:deoplete#enable_at_startup = 1

              " Required for operations modifying multiple buffers like rename
              set hidden

              let g:LanguageClient_serverCommands = {
              \ 'vue': ['${nodePackages.vue-language-server}/bin/vls'],
              \ 'javascript': ['${nodePackages.javascript-typescript-langserver}/bin/javascript-typescript-stdio'],
              \ 'typescript': ['${nodePackages.typescript-language-server}/bin/typescript-language-server', '--stdio'],
              \ 'java': ['${jdtls}/bin/jdtls'],
              \ 'kotlin': ['${kotlinls}/bin/kotlin-language-server']
              \ 'ruby': ['${pkgs.solargraph}/bin/solargraph', 'stdio'],
              \ }
            '';
            vam.knownPlugins = pkgs.vimPlugins // customPlugins;
            vam.pluginDictionaries = [
              {
                names = [
                  "ale"
                  "auto-pairs"
                  "deoplete-nvim"
                  "editorconfig-vim"
                  "kotlin-vim"
                  "LanguageClient-neovim"
                  "snow-color-theme"
                  "vim-ledger"
                  "vim-nix"
                  "vim-ruby"
                  "vim-vue"
                  "yats-vim"
                ];
              }
            ];
          };
        }
      )
    ];
  };
}