nixos/roles/home/common.nix

{ config, pkgs, ... }:

let unstable = import <nixos-unstable> { };
in {
  imports = [ ./zsh.nix ./git.nix ];

  home = {
    stateVersion = "21.05";
    sessionVariables = {
      EDITOR = "nvim";
      VISUAL = "nvim";
    };
  };

  programs.neovim = {
    enable = true;
    package = unstable.neovim-unwrapped;
    extraPackages = with pkgs; [
      nodePackages.prettier
      nodePackages.pyright
      rnix-lsp
      rust-analyzer
      cmake-format
      clang-tools
      rustfmt
      nixfmt
    ];
    extraConfig = ''
        " syntax
        syntax enable

        " color themes
        set termguicolors
        colorscheme molokai

        " wildcard mode
        set wildmode=longest:full,full

        " remapping popup menu (command autocompletion)
        "      cnoremap <expr> <up> pumvisible() ? "<C-p>" : "<up>
        "      cnoremap <expr> <down> pumvisible() ? "<C-n>" : "<down>"
        "      cnoremap <expr> <CR> pumvisible() ? "<C-e>":"<CR>"
        " set line numbers
        set number

        " enable indent guides
        let g:indent_guides_enable_on_vim_startup = 1

        " Exit Vim if NERDTree is the only window left.
        autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() |
        \ quit | endif

        " Start NERDTree. If a file is specified, move the cursor to its window.
        autocmd StdinReadPre * let s:std_in=1
        autocmd VimEnter * NERDTree | if argc() > 0 || exists("s:std_in") | wincmd p | endif

        " Start NERDTree when Vim starts with a directory argument.
        autocmd StdinReadPre * let s:std_in=1
        autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists('s:std_in') |
        \ execute 'NERDTree' argv()[0] | wincmd p | enew | execute 'cd '.argv()[0] | endif

        " Exit Vim if NERDTree is the only window left.
        autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() |
        \ quit | endif

        " Start interactive EasyAlign in visual mode (e.g. vipga)
        xmap ga <Plug>(EasyAlign)

        " Start interactive EasyAlign for a motion/text object (e.g. gaip)
        nmap ga <Plug>(EasyAlign)

        " Highlight row and column
        set cul
        set cuc

        " Fix for code not being aligned if between comment blocks
        set cindent cinkeys-=0#
        set expandtab shiftwidth=2 tabstop=2 softtabstop=2

        " Enable alignment
        let g:neoformat_basic_format_align = 1

        " Enable tab to spaces conversion
        let g:neoformat_basic_format_retab = 1

        " Enable trimmming of trailing whitespace
        let g:neoformat_basic_format_trim = 1

        lua << EOF
          ------------------
          -- Setup nvim-cmp.
          ------------------

          -- Set completeopt to have a better completion experience
          vim.o.completeopt = 'menuone,noselect'

          local cmp = require'cmp'

          cmp.setup({
            snippet = {
              -- REQUIRED - you must specify a snippet engine
              expand = function(args)
                vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
              end,
            },
            mapping = {
              ['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
              ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
              ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
              ['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
              ['<C-e>'] = cmp.mapping({
                i = cmp.mapping.abort(),
                c = cmp.mapping.close(),
              }),
              ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
            },
            sources = cmp.config.sources({
              { name = 'nvim_lsp' },
              { name = 'vsnip' }, -- For vsnip users.
            }, {
              { name = 'buffer' },
            })
          })

          -- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
          cmp.setup.cmdline('/', {
            sources = {
              { name = 'buffer' }
            }
          })

          -- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
          cmp.setup.cmdline(':', {
            sources = cmp.config.sources({
              { name = 'path' }
            }, {
              { name = 'cmdline' }
            })
          })

          -- Setup lspconfig.
          local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())

          --------------
          -- LSP Servers
          --------------

          require'lspconfig'.pyright.setup{
            capabilities = capabilities
          }
          require'lspconfig'.rust_analyzer.setup{
            capabilities = capabilities
          }
          require'lspconfig'.rnix.setup{
            capabilities = capabilities
          }
          require'lspconfig'.clangd.setup{
            capabilities = capabilities,
            cmd = {
              "clangd",
              "--background-index",
              "--clang-tidy",
            },
          }

          -------------------
          -- TreeSitter setup
          -------------------
          require'nvim-treesitter.configs'.setup {
            highlight = {
              enable = true,
              custom_captures = {
              -- Highlight the @foo.bar capture group with the "Identifier" highlight group.
                ["foo.bar"] = "Identifier",
              },
              -- Setting this to true will run `:h syntax` and tree-sitter at the same time.
              -- Set this to `true` if you depend on 'syntax' being enabled (like for indentation).
              -- Using this option may slow down your editor, and you may see some duplicate highlights.
              -- Instead of true it can also be a list of languages
              additional_vim_regex_highlighting = false,
            },
          }
      EOF
    '';

    viAlias = true;
    vimAlias = true;
    plugins = with unstable.vimPlugins; [
      vim-nix
      molokai
      vim-airline
      vim-airline-themes
      vim-lsp
      vim-indent-guides
      vim-signify
      nerdtree
      vim-easy-align
      vim-fugitive
      vimtex
      neoformat
      nvim-lspconfig
      vim-vsnip
      nvim-cmp
      cmp-nvim-lsp
      (nvim-treesitter.withPlugins (_: unstable.tree-sitter.allGrammars))
      nvim-treesitter-textobjects
    ];
  };
}