nix_config/home/neovim.nix

pkgs: {
  enable = true;
  extraConfig = ''
    set tabstop=4
    set softtabstop=4 " enables backspacing, etc
    set shiftwidth=4
    set expandtab
    set tw=80

    set bs=2		" allow backspacing over everything in insert mode
    set ai			" always set autoindenting on

    set number relativenumber
    set colorcolumn=100

    let g:pymode_options_max_line_length=95

    let mapleader = ','
    map <leader>n :lnext<CR>
    map <leader>p :lprev<CR>

    " Find files using Telescope command-line sugar.
    nnoremap <leader>e <cmd>Telescope find_files<cr>
    nnoremap <leader>g <cmd>Telescope live_grep<cr>
    nnoremap <leader>b <cmd>Telescope buffers<cr>
    nnoremap <leader>h <cmd>Telescope help_tags<cr>
    " temporary fix for broken popup menu colors
    " see here: https://github.com/nvim-telescope/telescope.nvim/issues/2145
    hi NormalFloat ctermfg=LightGrey

    " trouble.nvim settings
    nnoremap <leader>xx <cmd>TroubleToggle<cr>
    nnoremap <leader>xw <cmd>TroubleToggle workspace_diagnostics<cr>
    nnoremap <leader>xd <cmd>TroubleToggle document_diagnostics<cr>
    nnoremap <leader>xq <cmd>TroubleToggle quickfix<cr>
    nnoremap <leader>xl <cmd>TroubleToggle loclist<cr>
    nnoremap gR <cmd>TroubleToggle lsp_references<cr>

    lua << EOF
      require 'lspconfig'

      -- rust setup from https://sharksforarms.dev/posts/neovim-rust/
      -- Set completeopt to have a better completion experience
      -- :help completeopt
      -- menuone: popup even when there's only one match
      -- noinsert: Do not insert text until a selection is made
      -- noselect: Do not auto-select, nvim-cmp plugin will handle this for us.
      vim.o.completeopt = "menuone,noinsert,noselect"

      -- Avoid showing extra messages when using completion
      vim.opt.shortmess = vim.opt.shortmess + "c"

      local function on_attach(client, buffer)
        -- This callback is called when the LSP is atttached/enabled for this buffer
        -- we could set keymaps related to LSP, etc here.
      end

      -- Configure LSP through rust-tools.nvim plugin.
      -- rust-tools will configure and enable certain LSP features for us.
      -- See https://github.com/simrat39/rust-tools.nvim#configuration
      local opts = {
        tools = {
          runnables = {
            use_telescope = true,
          },
          inlay_hints = {
            auto = true,
            show_parameter_hints = true,
            parameter_hints_prefix = "",
            other_hints_prefix = "",
          },
          virt_text = {{"demo", "IncSearch"}},
          virt_text_pos = 'overlay',
        },

        -- all the opts to send to nvim-lspconfig
        -- these override the defaults set by rust-tools.nvim
        -- see https://github.com/neovim/nvim-lspconfig/blob/master/CONFIG.md#rust_analyzer
        server = {
          -- on_attach is a callback called when the language server attachs to the buffer
          on_attach = on_attach,
          settings = {
            -- to enable rust-analyzer settings visit:
            -- https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/generated_config.adoc
            ["rust-analyzer"] = {
              -- enable clippy on save
              checkOnSave = {
                command = "clippy",
              },
            },
          },
        },
      }

      require("rust-tools").setup(opts)

      -- Setup Completion
      -- See https://github.com/hrsh7th/nvim-cmp#basic-configuration
      local cmp = require("cmp")
      cmp.setup({
        preselect = cmp.PreselectMode.None,
        snippet = {
          expand = function(args)
            vim.fn["vsnip#anonymous"](args.body)
          end,
        },
        mapping = {
          ["<C-p>"] = cmp.mapping.select_prev_item(),
          ["<C-n>"] = cmp.mapping.select_next_item(),
          -- Add tab support
          ["<S-Tab>"] = cmp.mapping.select_prev_item(),
          ["<Tab>"] = cmp.mapping.select_next_item(),
          ["<C-d>"] = cmp.mapping.scroll_docs(-4),
          ["<C-f>"] = cmp.mapping.scroll_docs(4),
          ["<C-Space>"] = cmp.mapping.complete(),
          ["<C-e>"] = cmp.mapping.close(),
          ["<CR>"] = cmp.mapping.confirm({
            behavior = cmp.ConfirmBehavior.Insert,
            select = true,
          }),
        },

        -- Installed sources
        sources = {
          { name = "nvim_lsp" },
          { name = "vsnip" },
          { name = "path" },
          { name = "buffer" },
        },
      })
    EOF
  '';
  plugins = with pkgs.vimPlugins; [
    #context-vim
    #ctrlp
    #fzf
    #gundo
    python-mode
    telescope-nvim
    telescope-fzf-native-nvim
    #nvim-treesitter
    vim-nix

    # rust stuff
    nvim-lspconfig
    nvim-cmp
    cmp-nvim-lsp
    cmp-vsnip
    cmp-path
    cmp-buffer
    vim-vsnip
    rust-tools-nvim
    trouble-nvim
    nvim-web-devicons
  ];
  vimAlias = true;
  withPython3 = true;
}