neovim 0.10.0: Revamp colors, airline, and bufferline

My gruvbox and airline colors broke with Neovim 0.10.0.

* morhetz/gruvbox#459
* https://neovim.io/doc/user/news-0.10.html

To fix it, I had to ditch the unmaintained gruvbox theme and switched to
a lua-based gruvbox theme: ellisonleao/gruvbox.nvim

To fix airline's colors, I had to switch to a lua-based airline plugin:
lualine. I don't like lualine's bufferline implementation, so I added
akinsho/bufferline.nvim to handle my bufferline.

This also switches to using nvim-treesitter for all syntax highlighting.

README.md

@@ -48,10 +48,9 @@ I use [Homebrew Bundle](https://github.com/Homebrew/homebrew-bundle) for most of
 
 GruvBox iTerm2 color scheme. Download it, open it, then set it as your profile's color scheme: <https://github.com/morhetz/gruvbox-contrib/raw/master/iterm2/gruvbox-dark.itermcolors>
 
+I use the "MesoLGS Nerd Font" in iTerm2 which is in the `/Meslo/MesloLGSNerdFont-Regular.ttf` file from the `Meslo.tar.xz` release archive.
 
-I use the MesloLG Nerd fonts:
-
-1. https://www.nerdfonts.com/font-downloads -- https://github.com/ryanoasis/nerd-fonts/releases/download/v2.3.3/Meslo.zip
+1. https://www.nerdfonts.com/font-downloads -- https://github.com/ryanoasis/nerd-fonts/releases/download/v3.2.1/Meslo.tar.xz
 
 ![](screenshots/iterm_text_options.png)
 

home/.vimrc

@@ -5,33 +5,28 @@ if empty(glob(data_dir . '/autoload/plug.vim'))
   autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
 endif
 
-" PolyGot Settings
-" For some reason polyglot requires this before loading the plugin :'(
-"let g:polyglot_disabled = ['puppet', 'python', 'python-indent', 'python-compiler']
-let g:polyglot_disabled = ['puppet']
-
 " Vim Plug start
 call plug#begin(data_dir.'/plugged')
 
 " GitHub plugins
 Plug 'CopilotC-Nvim/CopilotChat.nvim', { 'branch': 'canary' }
 Plug 'Valloric/ListToggle'
 Plug 'airblade/vim-gitgutter'
-Plug 'bling/vim-airline'
+Plug 'akinsho/bufferline.nvim', { 'tag': '*' }
 Plug 'dense-analysis/ale'
+Plug 'ellisonleao/gruvbox.nvim'
 Plug 'fatih/vim-go', { 'do': ':GoUpdateBinaries' }
 Plug 'github/copilot.vim'
 Plug 'godlygeek/tabular'
 Plug 'hashivim/vim-terraform'
 Plug 'jjo/vim-cue'
 Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
 Plug 'junegunn/fzf.vim'
-Plug 'morhetz/gruvbox'
 Plug 'nvim-lua/plenary.nvim'
+Plug 'nvim-lualine/lualine.nvim'
+Plug 'nvim-tree/nvim-web-devicons'
+Plug 'nvim-treesitter/nvim-treesitter', {'do': ':TSUpdate'}
 Plug 'preservim/nerdtree'
-Plug 'rodjek/vim-puppet'
-Plug 'ryanoasis/vim-devicons'
-Plug 'sheerun/vim-polyglot'
 Plug 'tpope/vim-fugitive'
 
 call plug#end()

home/.vimrc.settings

@@ -39,19 +39,54 @@ colorscheme gruvbox
 "}}}
 " PLUGIN OPTIONS {{{
 
-"vim-airline options
-set laststatus=2
-let g:airline_powerline_fonts = 1
-let g:airline#extensions#tabline#enabled = 1
-let g:airline#extensions#tabline#fnamemod = ':t'
-let g:airline#extensions#tabline#show_tab_type = 0
-let g:airline#extensions#tabline#buffer_min_count = 1
-let g:airline_skip_empty_sections = 1
-let g:airline#parts#ffenc#skip_expected_string='utf-8[unix]'
-let g:airline#extensions#branch#vcs_checks = [] " Prevent unnecessary 'git status' calls.
-
-" vim-markdown settings
-let g:markdown_include_jekyll_support = 0
+" NOTE: inline lua heredocs break syntax highlighting for vimscript. Fix it by
+" running the following from within vim:
+"   !curl -sS https://raw.githubusercontent.com/neovim/neovim/v0.7.2/runtime/syntax/lua.vim > $VIMRUNTIME/syntax/lua.vim
+" See: https://github.com/neovim/neovim/issues/20456
+
+" https://github.com/nvim-lualine/lualine.nvim
+lua << EOF
+require('lualine').setup {
+  options = {
+    theme = 'gruvbox',
+  },
+  sections = {
+    lualine_c = {
+      -- https://github.com/nvim-lualine/lualine.nvim?tab=readme-ov-file#filename-component-options
+      { 'filename', path = 1 }
+    },
+  },
+  extensions = {
+    'fugitive',
+    'quickfix',
+    'nerdtree'
+  }
+}
+EOF
+
+" https://github.com/akinsho/bufferline.nvim
+" :h bufferline-configuration
+lua << EOF
+require("bufferline").setup{
+  options = {
+    show_buffer_close_icons = false,
+    separator_style = "slant",
+  }
+}
+EOF
+
+" https://github.com/nvim-treesitter/nvim-treesitter
+lua << EOF
+require('nvim-treesitter.configs').setup {
+  -- Automatically install missing parsers when entering buffer.
+  -- Recommendation: set to false if you don't have `tree-sitter` CLI installed locally
+  auto_install = true,
+  -- Use treesitter highlighting.
+  highlight = {
+    enable = true,
+  },
+}
+EOF
 
 " allows cursor change in tmux mode
 if exists('$TMUX')
@@ -62,17 +97,10 @@ else
     let &t_EI = "\<Esc>]50;CursorShape=0\x7"
 endif
 
-" Git Gutter
-highlight GitGutterAdd          ctermbg=235 ctermfg=10
-highlight GitGutterChange       ctermbg=235 ctermfg=208
-highlight GitGutterDelete       ctermbg=235 ctermfg=9
-highlight GitGutterChangeDelete ctermbg=235 ctermfg=175
-
 " vim-go
 let g:go_template_autocreate = 0 " Disable auto-creation of template files
 
 " ALE Options
-let g:airline#extensions#ale#enabled = 1  " Use the vim-airline integration
 let g:ale_completion_enabled = 1
 let g:ale_go_golangci_lint_package = 1  " Run golangci-lint on the entire Go package
 let g:ale_lint_on_save = 0
@@ -117,8 +145,7 @@ let g:python_highlight_all = 1
 " https://github.com/CopilotC-Nvim/CopilotChat.nvim
 lua << EOF
 require("CopilotChat").setup {
-  debug = true, -- Enable debugging
-  -- See Configuration section for rest
+  debug = true,
 }
 EOF
 
@@ -187,20 +214,8 @@ augroup HighlightProblems
           \ call AddLiteralTabMatch()
 augroup END
 
-" Highlight Colors
-highlight Default                     ctermfg=1
-" Darker vertical line between splits.
-highlight vertsplit       ctermbg=235 ctermfg=239
-" Darker line numbers.
-highlight LineNr                      ctermfg=239
 " Highlight search terms with orange.
-highlight Search          ctermbg=235 ctermfg=166
-" Hide the sign column.
-highlight SignColumn      ctermbg=235
-" Hide the rows of '~' at the end of a document.
-highlight EndOfBuffer     ctermbg=235 ctermfg=235
-"highlight StatusLine      ctermbg=245 ctermfg=235
-"highlight StatusLineNC    ctermbg=237 ctermfg=235
+highlight Search  ctermbg=235 ctermfg=166
 
 " New vertical splits go to the right rather than the left
 set splitright