feat: replace coq.nvim with nvim-cmp and luasnip

nvim/lua/options.lua

@@ -39,6 +39,9 @@ vim.opt.smartcase = true
 -- preview commands
 vim.opt.inccommand = "split"
 
+-- completion
+vim.opt.completeopt = "menu,menuone,noselect"
+
 -- set cursorline in active window
 vim.cmd([[
     augroup CursorLine
@@ -57,10 +60,3 @@ vim.cmd([[
     augroup END
 ]])
 
--- coq.nvim
-vim.g.coq_settings = {
-    auto_start = "shut-up",
-    keymap = {
-        jump_to_mark = "<c-s>" -- prevent <C-h> remapping
-    }
-}

nvim/lua/plugins.lua

@@ -44,10 +44,7 @@ return require('packer').startup(function(use)
         config = function()
             require'tabline'.setup {
                 enable = true,
-                options = {
+                options = {show_bufnr = true, show_filename_only = true}
-                    show_bufnr = true,
-                    show_filename_only = true,
-                }
             }
         end,
         requires = {
@@ -87,9 +84,78 @@ return require('packer').startup(function(use)
 
     -- autocompletion
     use({
-        "ms-jpq/coq_nvim",
+        "L3MON4D3/LuaSnip",
-        branch = "coq",
+        requires = {"rafamadriz/friendly-snippets"},
-        requires = {{'ms-jpq/coq.artifacts', branch = 'artifacts'}}
+        config = function()
+            require("luasnip.loaders.from_vscode").lazy_load()
+        end
+    })
+    use({
+        "hrsh7th/nvim-cmp",
+        requires = {
+            "hrsh7th/cmp-nvim-lsp", "hrsh7th/cmp-buffer", "hrsh7th/cmp-path",
+            "hrsh7th/cmp-cmdline", "hrsh7th/cmp-git", "hrsh7th/cmp-nvim-lua",
+            "saadparwaiz1/cmp_luasnip"
+        },
+        config = function()
+            local has_words_before = function()
+                local line, col = unpack(vim.api.nvim_win_get_cursor(0))
+                return col ~= 0 and
+                           vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(
+                               col, col):match("%s") == nil
+            end
+
+            local cmp = require('cmp')
+            local luasnip = require("luasnip")
+
+            cmp.setup({
+                snippet = {
+                    expand = function(args)
+                        require("luasnip").lsp_expand(args.body)
+                    end
+                },
+                sources = require("cmp").config.sources({
+                    {name = "nvim_lsp"}, {name = "luasnip"}, {name = "path"},
+                    {name = "buffer"}, {name = "git"}
+                }),
+                mapping = {
+                    ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(),
+                                                {'i', 'c'}),
+                    ['<CR>'] = cmp.mapping.confirm({select = true}),
+                    ["<Tab>"] = cmp.mapping(function(fallback)
+                        if cmp.visible() then
+                            cmp.select_next_item()
+                        elseif luasnip.expand_or_jumpable() then
+                            luasnip.expand_or_jump()
+                        elseif has_words_before() then
+                            cmp.complete()
+                        else
+                            fallback()
+                        end
+                    end, {"i", "s"}),
+
+                    ["<S-Tab>"] = cmp.mapping(function(fallback)
+                        if cmp.visible() then
+                            cmp.select_prev_item()
+                        elseif luasnip.jumpable(-1) then
+                            luasnip.jump(-1)
+                        else
+                            fallback()
+                        end
+                    end, {"i", "s"})
+                }
+            })
+
+            -- `/` cmdline setup.
+            cmp.setup.cmdline('/', {sources = {{name = 'buffer'}}})
+
+            -- `:` cmdline setup.
+            cmp.setup.cmdline(':', {
+                sources = cmp.config
+                    .sources({{name = 'path'}}, {{name = 'cmdline'}})
+            })
+
+        end
     })
 
     -- highlight current symbol

nvim/lua/plugins/lspconfig.lua

@@ -1,4 +1,3 @@
-local coq = require("coq")
 local lsp_installer = require("nvim-lsp-installer")
 
 local nvim_runtime_path = vim.split(package.path, ';')
@@ -6,9 +5,9 @@ table.insert(nvim_runtime_path, "lua/?.lua")
 table.insert(nvim_runtime_path, "lua/?/init.lua")
 
 local language_servers = {
-    "ansiblels", "bashls", "clangd", "dockerls", "efm", "eslint", "html", "jsonls",
+    "ansiblels", "bashls", "clangd", "dockerls", "efm", "eslint", "html",
-    "pyright", "rust_analyzer", "sumneko_lua", "svelte", "taplo", "terraformls",
+    "jsonls", "pyright", "rust_analyzer", "sumneko_lua", "svelte", "taplo",
-    "tflint", "tsserver", "volar"
+    "terraformls", "tflint", "tsserver", "volar"
 }
 
 for _, server_name in pairs(language_servers) do
@@ -22,7 +21,8 @@ end
 local extra_server_opts = {
     ["efm"] = function(opts)
         opts.filetypes = {
-            "lua", "html", "javascript", "markdown", "typescript", "typescriptreact"
+            "lua", "html", "javascript", "markdown", "typescript",
+            "typescriptreact"
         }
         opts.init_options = {documentFormatting = true}
         opts.settings = {
@@ -67,11 +67,7 @@ local extra_server_opts = {
     end,
     ["rust_analyzer"] = function(opts)
         opts.settings = {
-            ["rust-analyzer"] = {
+            ["rust-analyzer"] = {checkOnSave = {command = "clippy"}}
-                checkOnSave = {
-                    command = "clippy"
-                }
-            }
         }
     end,
     ["sumneko_lua"] = function(opts)
@@ -134,10 +130,13 @@ local function custom_on_attach(client, buffer_nr)
 end
 
 lsp_installer.on_server_ready(function(server)
-    local opts = coq.lsp_ensure_capabilities({
+    local cmp = require("cmp_nvim_lsp")
+
+    local opts = {
         on_attach = custom_on_attach,
-        capabilities = vim.lsp.protocol.make_client_capabilities()
+        capabilities = cmp.update_capabilities(vim.lsp.protocol
-    })
+                                                   .make_client_capabilities())
+    }
 
     if extra_server_opts[server.name] then
         extra_server_opts[server.name](opts)