init

lua/code-completion.lua

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+-- menuone: show also for just one code suggestion
+-- noinsert: only insert text when selection confirmed
+-- noselect: force to select from suggestion
+-- preview: show more details
+vim.opt.completeopt = {'menuone', 'noselect', 'noinsert', 'preview'}
+
+-- shortmess is used to reduce verbocity
+-- vim.opt.shortmess = vim.opt.shortmess + { c = true }
+
+local cmp = require'cmp'
+cmp.setup( {
+	-- configuration 
+ snippet = {
+   expand = function(args)
+     vim.fn["UltiSnips#Anon"](args.body)
+   end,
+ },
+	-- mapping 
+	  mapping = {
+    -- Shift+TAB to go to the Previous Suggested item
+    ['<C-s-k>'] = cmp.mapping.select_prev_item(),
+    -- Tab to go to the next suggestion
+    ['<C-k>'] = cmp.mapping.select_next_item(),
+    -- CTRL+SHIFT+f to scroll backwards in description
+    ['<C-S-f>'] = cmp.mapping.scroll_docs(-4),
+    -- CTRL+F to scroll forwards in the description
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    -- CTRL+SPACE to bring up completion at current Cursor location
+    ['<C-Space>'] = cmp.mapping.complete(),
+    -- CTRL+e to exit suggestion and close it
+    ['<C-e>'] = cmp.mapping.close(),
+    -- CR (enter or return) to CONFIRM the currently selection suggestion
+    -- We set the ConfirmBehavior to insert the Selected suggestion
+    ['<CR>'] = cmp.mapping.confirm({
+    behavior = cmp.ConfirmBehavior.Insert,
+      select = true,
+    })
+  },
+
+	-- installed sources for code suggestion
+  sources = {
+      { name = 'path' },
+      { name = 'nvim_lsp', keyword_length = 3 },
+      { name = 'nvim_lsp_signature_help'}, 
+      { name = 'nvim_lua', keyword_length = 2},
+      { name = 'buffer', keyword_length = 2 },
+      { name = 'ultisnips', keyword_length = 2 },
+      { name = 'calc' },
+      { name = "lua-latex-symbols", option = { cache = true } }
+ },
+
+ -- Add borders to the windows
+ window = {
+   completion = cmp.config.window.bordered(),
+   documentation = cmp.config.window.bordered(),
+ },
+ -- add formating of the different sources
+   formatting = {
+   fields = {'menu', 'abbr', 'kind'},
+   format = function(entry, item)
+     local menu_icon ={
+       nvim_lsp = 'λ',
+       ultisnips = '⋗',
+       buffer = 'b',
+       path = 'p',
+       calc = 'Σ',
+       lualatexsymbols = 'L'
+     }
+     item.menu = menu_icon[entry.source.name]
+       return item
+   end,
+  }
+} )
+
+-- Set configuration for specific filetype.
+cmp.setup.filetype('gitcommit', {
+  sources = cmp.config.sources({
+    { name = 'cmp_git' }, -- You can specify the `cmp_git` source if you were installed it.
+  }, {
+    { name = 'buffer' },
+  })
+})
+
+
+
+-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
+cmp.setup.cmdline(':', {
+  mapping = cmp.mapping.preset.cmdline(),
+  sources = cmp.config.sources({
+    { name = 'path' }
+  }, {
+    { name = 'cmdline' }
+  })
+})

lua/plugins.lua

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+return require('packer').startup(function(use)
+  -- Configurations will go here soon
+ use 'wbthomason/packer.nvim'
+ use 'dense-analysis/ale'
+ use 'preservim/nerdtree'
+ use 'Xuyuanp/nerdtree-git-plugin'
+ use 'tpope/vim-surround'
+ use 'SirVer/ultisnips'
+ use 'vim-airline/vim-airline'
+ use {
+   'nvim-treesitter/nvim-treesitter',
+   run = function()
+     local ts_update = require('nvim-treesitter.install').update({ with_sync = true })
+     ts_update()
+   end,
+ }
+ use { 'junegunn/fzf', run = ":call fzf#install()" }
+ use 'junegunn/fzf.vim'
+-- use 'Valloric/YouCompleteMe'
+ use 'williamboman/mason.nvim'
+ use 'williamboman/mason-lspconfig.nvim'
+ use 'neovim/nvim-lspconfig'
+ use 'mfussenegger/nvim-dap'
+ use 'f-person/git-blame.nvim'
+ use 'mfussenegger/nvim-lint'
+ use 'lewis6991/gitsigns.nvim'
+ use 'p00f/nvim-ts-rainbow'
+ use 'cohama/lexima.vim'
+ use 'hrsh7th/nvim-cmp' 
+ use 'hrsh7th/cmp-nvim-lsp'
+ use 'hrsh7th/cmp-nvim-lua'
+ use 'hrsh7th/cmp-nvim-lsp-signature-help'
+ use 'hrsh7th/cmp-path'
+ use 'hrsh7th/cmp-buffer'
+ use 'hrsh7th/cmp-calc'
+ use 'amarakon/nvim-cmp-lua-latex-symbols'
+ use 'prabirshrestha/async.vim'
+ use 'prabirshrestha/vim-lsp'
+ use 'nvim-tree/nvim-web-devicons'
+ use {'romgrk/barbar.nvim', wants = 'nvim-web-devicons'}
+ use({"petertriho/cmp-git", requires = "nvim-lua/plenary.nvim"})
+ use 'quangnguyen30192/cmp-nvim-ultisnips'
+ use 'ryanoasis/vim-devicons'
+end)

lua/tools.lua

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+-- in tools.lua
+local api = vim.api
+
+local M = {};
+
+function M.makeScratch()
+	vim.bo[0].buftype=nofile -- set the current buffer's (buffer 0) buftype to nofile
+	vim.bo[0].bufhidden=hide
+	vim.bo[0].swapfile=false
+end;
+
+
+
+return M;