nvim stuff

Installer/os_nvim_init.vim

@@ -1,52 +1,183 @@
 " Plugins
 " ==============================================================================
 call plug#begin(stdpath('config') . '/plugged')
+    " nerdtree provides a file tree explorer
+    " vim-dispatch allows running async jobs in vim (i.e. builds in the background)
     Plug 'https://github.com/scrooloose/nerdtree', { 'on': 'NERDTreeToggle' }
+    Plug 'https://github.com/tpope/vim-dispatch'
+    Plug 'https://github.com/nvim-treesitter/nvim-treesitter', {'do': ':TSUpdate'}
+
+    " Fast fuzzy searcher, the .vim repository pulls in sane defaults for
+    " setting up fzf in vim.
     Plug 'https://github.com/junegunn/fzf'
     Plug 'https://github.com/junegunn/fzf.vim'
-    Plug 'https://github.com/Tetralux/odin.vim'
+
-    Plug 'https://github.com/morhetz/gruvbox'
+    " nvim-lspconfig sets up sane defaults for LSP servers (i.e. clangd)
+    " nvim-cmp is a more powerful autocomplete engine
+    " LuaSnip allow writing snippets into the buffer, we can power the snippets from LSP
+    " cmp-nvim-lsp preset capability flags to request more powerful autocomplete from LSP server
+    " cmp_luasnip a LuaSnip addon that provides a completion source to nvim-cmp
+    " cmp-buffer provides a buffer completion source to nvim-cmp
+    " cmp-path provides a path completion source to nvim-cmp
     Plug 'https://github.com/neovim/nvim-lspconfig'
-    Plug 'https://github.com/tpope/vim-dispatch'
+    Plug 'https://github.com/hrsh7th/nvim-cmp'
+    Plug 'https://github.com/L3MON4D3/LuaSnip'
+    Plug 'https://github.com/hrsh7th/cmp-nvim-lsp'
+    Plug 'https://github.com/saadparwaiz1/cmp_luasnip'
+    Plug 'https://github.com/hrsh7th/cmp-buffer'
+    Plug 'https://github.com/hrsh7th/cmp-path'
+
+    " odin for syntax highlighting
+    Plug 'https://github.com/Tetralux/odin.vim'
+    Plug 'https://github.com/sainnhe/gruvbox-material'
 call plug#end()
 
-" Setup LSP
+" Lua Setup
 " ==============================================================================
 lua <<EOF
-require('lspconfig').clangd.setup {
+  -- Vim Options
+  -- ===========================================================================
+  vim.opt.autowrite=true        -- Automatically save before cmds like :next and :prev
+  vim.opt.colorcolumn={80, 100} -- Set a 80 and 100 char column ruler
+  vim.opt.completeopt={'menu', 'menuone', 'noselect'}
+  vim.opt.cpoptions:append('$') -- $ as end marker for the change operator
+  vim.opt.cursorline=true       -- Highlight current line
+  vim.opt.expandtab=true        -- Replace tabs with spaces
+  vim.opt.guifont={'JetBrains_Mono:h9',
+                   'Consolas:h9',
+                   'InputMonoCondensed:h9'}
+  vim.opt.hlsearch=false        -- Highlight just the first match on search
+  vim.opt.ignorecase=true       -- Search is not case sensitive
+  vim.opt.linebreak=true        -- On wrapped lines, break on the wrapping word intelligently
+  vim.opt.list=true             -- Show the 'listchar' characters on trailing spaces, tabs e.t.c
+  vim.opt.listchars:append('tab:>-,trail:■,extends:»,precedes:«')
+  vim.opt.number=true           -- Show line numbers
+  vim.opt.relativenumber=true   -- Show relative line numbers
+  vim.opt.shiftwidth=4          -- Number of spaces for each autoindent step
+  vim.opt.splitright=true       -- Open new splits to the right of the current one
+  vim.opt.swapfile=false        -- Disable swapfile (stores the things changed in a file)
+  vim.opt.textwidth=80          -- On format, format to 80 char long lines
+  vim.opt.visualbell=true       -- Flash the screen on error
+  vim.opt.wrap=false            -- Don't wrap lines of text automatically
+
+  -- LSP Setup
+  -- ===========================================================================
+  -- Load the additional capabilities supported by nvim-cmp
+  local custom_capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())
+
+  -- Use an on_attach function to only map the following keys
+  -- after the language server attaches to the current buffer
+  local custom_on_attach = function(client, bufnr)
+    -- Enable completion triggered by <c-x><c-o>
+    vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+    -- See `:help vim.diagnostic.*` for documentation on any of the below functions
+    local opts = { noremap=true, silent=true }
+    vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
+    vim.keymap.set('n', '<A-n>',    vim.diagnostic.goto_next,  opts)
+    vim.keymap.set('n', '<A-p>',    vim.diagnostic.goto_prev,  opts)
+
+    -- See `:help vim.lsp.*` for documentation on any of the below functions
+    local bufopts = { noremap=true, silent=true, buffer=bufnr }
+    vim.keymap.set('n',  'K',    vim.lsp.buf.hover,           bufopts)
+    vim.keymap.set('n', 'gD',    vim.lsp.buf.declaration,     bufopts)
+    vim.keymap.set('n', 'gd',    vim.lsp.buf.definition,      bufopts)
+    vim.keymap.set('n', 'gt',    vim.lsp.buf.type_definition, bufopts)
+    vim.keymap.set('n', 'gr',    vim.lsp.buf.references,      bufopts)
+    vim.keymap.set('n', 'gs',    vim.lsp.buf.signature_help,  bufopts)
+    vim.keymap.set('n', '<A-a>', vim.lsp.buf.code_action,     bufopts)
+    vim.keymap.set('n', '<A-r>', vim.lsp.buf.rename,          bufopts)
+  end
+
+  -- Request additional completion capabilities from the LSP server(s)
+  local lspconfig = require('lspconfig')
+  local servers   = { 'clangd', }
+  for _, lsp in ipairs(servers) do
+    lspconfig[lsp].setup { on_attach = custom_on_attach, capabilities = custom_capabilities, }
+  end
+
+  -- Autocomplete Setup
+  -- ===========================================================================
+  local luasnip = require 'luasnip'
+  local cmp     = require 'cmp'
+
+  cmp.setup {
+    snippet = {
+      expand = function(args) luasnip.lsp_expand(args.body) end,
+    },
+    mapping = cmp.mapping.preset.insert({
+      ['<C-d>'] = cmp.mapping.scroll_docs(4),
+      ['<C-u>'] = cmp.mapping.scroll_docs(-4),
+      ['<C-l>'] = cmp.mapping.scroll_docs(-1),   -- Scroll the docs up   by 1 line
+      ['<C-h>'] = cmp.mapping.scroll_docs(1),    -- Scroll the docs down by 1 line
+      ['<CR>']  = cmp.mapping.confirm { behavior = cmp.ConfirmBehavior.Replace, select = true, },
+      ['<C-j>'] = cmp.mapping(function(fallback) -- Move down the autocomplete list
+        if cmp.visible() then
+          cmp.select_next_item()
+        elseif luasnip.expand_or_jumpable() then
+          luasnip.expand_or_jump()
+        else
+          fallback()
+        end
+      end, { 'i', 's' }),
+      ['<C-k>'] = cmp.mapping(function(fallback) -- Move up the autocomplete list
+        if cmp.visible() then
+          cmp.select_prev_item()
+        elseif luasnip.jumpable(-1) then
+          luasnip.jump(-1)
+        else
+          fallback()
+        end
+      end, { 'i', 's' }),
+    }),
+    sources = {
+      { name = 'nvim_lsp' }, { name = 'luasnip' },
+    },
+  }
+
+  -- Clangd LSP Setup
+  -- ===========================================================================
+  lspconfig.clangd.setup {
+    single_file_support = false, --- Don't launch LSP if the directory does not have LSP metadata
+  }
+
+  require('nvim-treesitter.configs').setup {
+    ensure_installed = { "c", "cpp" }, -- A list of parser names, or "all"
+    sync_install     = false,          -- Install parsers synchronously (only applied to `ensure_installed`)
+    ignore_install   = { },            -- List of parsers to ignore installing (for "all")
+
+    highlight = {
+      enable = true, -- `false` will disable the whole extension
+
+      -- NOTE: these are the names of the parsers and not the filetype. (for example if you want to
+      -- disable highlighting for the `tex` filetype, you need to include `latex` in this list as this is
+      -- the name of the parser)
+      -- list of language that will be disabled
+      disable = { },
+
+      -- 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
 
 " Theme
 " ==============================================================================
-let g:gruvbox_contrast_dark='hard'
+let g:gruvbox_material_background='hard'
-let g:gruvbox_italic=0
+let g:gruvbox_material_foreground='mix'
-let g:gruvbox_bold=0
+let g:gruvbox_material_disable_italic_comment=1
-colorscheme gruvbox
+let g:gruvbox_material_enable_italic=0
+let g:gruvbox_material_enable_bold=0
+let g:gruvbox_material_diagnostic_virtual_text='colored'
+colorscheme gruvbox-material
 
 " Options
 " ==============================================================================
-set autowrite                 " Automatically save before commands like :next and :make
-set nowrap                    " Don't wrap lines of text automatically
-set ignorecase                " Search isn't case sensitive
-set splitright                " Open new splits to the right of the current one
-set visualbell                " Flash the screen on error
-set expandtab                 " Replace tabs with spaces
-set noswapfile                " Disable swapfile (stores the things changed in a file)
-set colorcolumn=80,100        " Set a 80 and 100 char column ruler
-set cpoptions+=$              " $ as end marker for the change operator
-set cursorline                " Highlight current line
-set linebreak                 " On wrapped lines, break on the wrapping word intelligently
-set list                      " Show the 'listchar' characters on trailing spaces, tabs e.t.c
-set listchars+=tab:>-,trail:■,extends:»,precedes:«
-set number                    " Show line numbers
-set relativenumber            " Show relative line numbers
-set shiftwidth=4              " Number of spaces for each autoindent step
-set textwidth=80              " On format, format to 80 char long lines
-set nohlsearch
 " Show EOL type and last modified timestamp, right after the filename
 set statusline=%<%F%h%m%r\ [%{&ff}]\ (%{strftime(\"%H:%M\ %d/%m/%Y\",getftime(expand(\"%:p\")))})%=%l,%c%V\ %P
-set guifont=JetBrains_Mono:h9,Consolas:h9,InputMonoCondensed:h9
 
 " Resize splits when the window is resized
 au VimResized * :wincmd =
@@ -66,13 +197,6 @@ endif
 
 " Functions
 " ==============================================================================
-" Don't show trailing spaces in insert mode
-augroup trailing
-  au!
-  au InsertEnter * :set listchars-=trail:■
-  au InsertLeave * :set listchars+=trail:■
-augroup END
-
 " Increase font size using (Ctrl+Up Arrow) or (Ctrl+Down Arrow) if we are using
 " gvim Otherwise font size is determined in terminal
 nnoremap <C-Up> :silent! let &guifont = substitute(
@@ -92,15 +216,6 @@ augroup persistent_settings
   au bufenter * :set formatoptions=q1j
 augroup end
 
-" Return to the same line when a file is reopened
-augroup line_return
-  au!
-  au BufReadPost *
-        \ if line("'\"") > 0 && line("'\"") <= line("$") |
-        \     execute 'normal! g`"zvzz' |
-        \ endif
-augroup end
-
 " General Key Bindings
 " ==============================================================================
 " Map Ctrl+HJKL to navigate buffer window
@@ -126,13 +241,15 @@ nnoremap <leader>s :vs<CR>
 
 " Go to next error
 " Go to previous error
-nnoremap <A-n> :cn<CR>
+nnoremap <A-j> :cn<CR>
-nnoremap <A-p> :cp<CR>
+nnoremap <A-k> :cp<CR>
 
 " FZF
 " ==============================================================================
-nnoremap <leader>f :FzfFiles 
+nnoremap <leader>f :FzfFiles<CR>
+nnoremap <leader>F :FzfFiles 
 nnoremap <leader>t :FzfTags<CR>
+nnoremap <leader>r :FzfRg<R>
 nnoremap <leader>r :FzfRg 
 nnoremap <leader>b :FzfBuffers<CR>
 nnoremap <leader>l :FzfLines<CR>