Add nvim-cmp config & rust_analyzer lsp provider

.config/nvim/init.lua

@@ -23,6 +23,15 @@ Plug 'mattn/emmet-vim'
 
 Plug 'neovim/nvim-lspconfig'
 
+Plug 'hrsh7th/cmp-nvim-lsp'
+Plug 'hrsh7th/cmp-buffer'
+Plug 'hrsh7th/cmp-path'
+Plug 'hrsh7th/cmp-cmdline'
+Plug 'hrsh7th/nvim-cmp'
+
+Plug 'hrsh7th/cmp-vsnip'
+Plug 'hrsh7th/vim-vsnip'
+
 -- style
 Plug 'loctvl842/monokai-pro.nvim'
 Plug 'eliseshaffer/darklight.nvim'
@@ -37,12 +46,100 @@ vim.lsp.enable('ts_ls')
 -- vim.lsp.enable('eslint')
 vim.lsp.enable('html')
 vim.lsp.enable('jsonls')
+vim.lsp.enable('rust_analyzer')
 
 vim.keymap.set("n", "<leader>gd", vim.lsp.buf.definition, {})
 vim.keymap.set("n", "<leader>gr", vim.lsp.buf.references, {})
 vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, {})
 vim.keymap.set("n", "<leader>do", vim.lsp.buf.code_action, {})
 
+-- Set up nvim-cmp.
+  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.
+        -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+        -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
+        -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+        -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
+
+        -- For `mini.snippets` users:
+        -- local insert = MiniSnippets.config.expand.insert or MiniSnippets.default_insert
+        -- insert({ body = args.body }) -- Insert at cursor
+        -- cmp.resubscribe({ "TextChangedI", "TextChangedP" })
+        -- require("cmp.config").set_onetime({ sources = {} })
+      end,
+    },
+    window = {
+      -- completion = cmp.config.window.bordered(),
+      -- documentation = cmp.config.window.bordered(),
+    },
+    mapping = cmp.mapping.preset.insert({
+      ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+      ['<C-f>'] = cmp.mapping.scroll_docs(4),
+      ['<C-Space>'] = cmp.mapping.complete(),
+      ['<C-e>'] = cmp.mapping.abort(),
+      ['<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 = 'luasnip' }, -- For luasnip users.
+      -- { name = 'ultisnips' }, -- For ultisnips users.
+      -- { name = 'snippy' }, -- For snippy users.
+    }, {
+      { name = 'buffer' },
+    })
+  })
+
+  -- To use git you need to install the plugin petertriho/cmp-git and uncomment lines below
+  -- Set configuration for specific filetype.
+  --[[ cmp.setup.filetype('gitcommit', {
+    sources = cmp.config.sources({
+      { name = 'git' },
+    }, {
+      { name = 'buffer' },
+    })
+ })
+ require("cmp_git").setup() ]]-- 
+
+  -- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
+  cmp.setup.cmdline({ '/', '?' }, {
+    mapping = cmp.mapping.preset.cmdline(),
+    sources = {
+      { 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' }
+    }),
+    matching = { disallow_symbol_nonprefix_matching = false }
+  })
+
+  -- Set up lspconfig.
+  local capabilities = require('cmp_nvim_lsp').default_capabilities()
+  require('lspconfig')['ts_ls'].setup {
+    capabilities = capabilities
+  }
+  require('lspconfig')['html'].setup {
+    capabilities = capabilities
+  }
+  require('lspconfig')['jsonls'].setup {
+    capabilities = capabilities
+  }
+  require('lspconfig')['rust_analyzer'].setup {
+    capabilities = capabilities
+  }
+
 
 local fzflua = require('fzf-lua')
 fzflua.setup{
@@ -106,6 +203,9 @@ autocmd Filetype css setlocal ts=2 sw=2 expandtab
 autocmd Filetype python setlocal ts=4 sts=4 sw=4 expandtab
 ]])
 
+vim.cmd([[
+autocmd Filetype lua setlocal ts=2 sw=2 expandtab
+]])
 
 
 -- TeX