fix: improve nvim lsp usage

Signed-off-by: Lucas Sta Maria <lucas@priime.dev>

.config/nvim/init.lua

@@ -29,6 +29,7 @@ opt("updatetime", 100)
 opt("mouse", "a")
 
 vim.g.mapleader = " "
+vim.g.copilot_no_tab_map = true
 
 require("plugins")
 require("mappings")

.config/nvim/lua/completion.lua

@@ -1,3 +0,0 @@
-vim.g.coq_settings = {auto_start = true}
-local coq = require('coq')
-vim.cmd('COQnow')

.config/nvim/lua/lsp.lua

@@ -1,5 +1,60 @@
-local lspconfig = require('lspconfig')
+local lspconfig = require("lspconfig")
+local saga = require("lspsaga")
+local cmp = require("cmp")
 
+cmp.setup({
+    snippet = {
+      expand = function(args)
+        require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+      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 = 'luasnip' }, -- For luasnip users.
+    }, {
+      { name = 'buffer' },
+    })
+  })
+
+  -- 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 buffer source for `/` (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' }
+    })
+  })
+
+  local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())
 
 local on_attach = function(client, bufnr)
     local opts = { noremap = true, silent = true }
@@ -18,33 +73,32 @@ local on_attach = function(client, bufnr)
     -- Mappings
     key('n', '<leader>cD', '<cmd>lua vim.lsp.buf.declaration()<CR>')
     key('n', '<leader>cd', '<cmd>lua vim.lsp.buf.definition()<CR>')
-    key('n', '<leader>ch', '<cmd>lua vim.lsp.buf.hover()<CR>')
+    key('n', '<leader>cp', '<cmd>Lspsaga preview_definition<CR>')
+    key('n', '<leader>ch', '<cmd>Lspsaga hover_doc<CR>')
     key('n', '<leader>ci', '<cmd>lua vim.lsp.buf.implementation()<CR>')
-    key('n', '<leader>sh', '<cmd>lua vim.lsp.buf.signature_help()<CR>')
+    key('n', '<leader>sh', '<cmd>Lspsaga signature_help<CR>')
     key('n', '<leader>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>')
     key('n', '<leader>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>')
     key('n', '<leader>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>')
     key('n', '<leader>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>')
     key('n', '<leader>rn', '<cmd>lua vim.lsp.buf.rename()<CR>')
-    key('n', '<leader>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>')
+    key('n', '<leader>ca', '<cmd>Lspsaga code_action<CR>')
     key('n', '<leader>cr', '<cmd>lua vim.lsp.buf.references()<CR>')
     key('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>')
     key('n', '<leader>cs', '<cmd>lua vim.diagnostic.open_float()<CR>')
 end
 
-local coq = require('coq')
-
-lspconfig.ccls.setup(coq.lsp_ensure_capabilities{
+lspconfig.ccls.setup {
     on_attach = on_attach,
     capabilities = capabilities,
     init_options = {
         cache = {
-            directory = vim.fn.expand("$HOME/.cache/ccls/")
+            directory = vim.fn.expand("$HOME/.cache/ccls")
+        }
     }
 }
-})
 
-lspconfig.rust_analyzer.setup(coq.lsp_ensure_capabilities{
+lspconfig.rust_analyzer.setup {
     on_attach = on_attach,
     capabilities = capabilities,
     settings = {
@@ -59,24 +113,27 @@ lspconfig.rust_analyzer.setup(coq.lsp_ensure_capabilities{
             }
         }
     }
-})
+}
 
 lspconfig.tsserver.setup {
     on_attach = on_attach,
-    capabilities = capabilities
+    capabilities = capabilities,
 }
-lspconfig.tsserver.setup(coq.lsp_ensure_capabilities())
 
-lspconfig.java_language_server.setup(coq.lsp_ensure_capabilities{
+lspconfig.java_language_server.setup {
     on_attach = on_attach,
     capabilities = capabilities,
     cmd = { "/usr/share/java/java-language-server/lang_server_linux.sh" }
-})
-
-lspconfig.vuels.setup {
-    on_attach = on_attach,
-    capabilities = capabilities
 }
-lspconfig.vuels.setup(coq.lsp_ensure_capabilities())
 
-lspconfig.racket_langserver.setup {}
+lspconfig.racket_langserver.setup {
+    on_attach = on_attach,
+    capabilities = capabilities,
+}
+
+lspconfig.ocamllsp.setup {
+    on_attach = on_attach,
+    capabilities = capabilities,
+}
+
+saga.init_lsp_saga()

.config/nvim/lua/mappings.lua

@@ -20,3 +20,6 @@ map("n", "<leader>op", ":NvimTreeToggle<CR>")
 map("n", "<leader>to", ":Telescope<CR>")
 map("n", "<leader>tf", ":Telescope find_files<CR>")
 map("n", "<leader>tg", ":Telescope live_grep<CR>")
+
+-- copilot
+map('i', '<C-a>', 'copilot#Accept("<CR>")', {expr=true, silent=true})

.config/nvim/lua/plugins.lua

@@ -25,7 +25,14 @@ packer.startup(function()
     use("akinsho/toggleterm.nvim")
 
     -- completion
-    use{"ms-jpq/coq_nvim",branch='coq'}
+    use("hrsh7th/cmp-nvim-lsp")
+    use("hrsh7th/cmp-buffer")
+    use("hrsh7th/cmp-path")
+    use("hrsh7th/cmp-cmdline")
+    use("hrsh7th/nvim-cmp")
+    use{"glepnir/lspsaga.nvim",branch="main"}
+    use("github/copilot.vim")
+    use("L3MON4D3/LuaSnip")
     
     -- misc
     use("davidgranstrom/nvim-markdown-preview")
@@ -115,3 +122,9 @@ vim.cmd[[
 
 -- todo-comments
 require('todo-comments').setup {}
+
+-- copilot
+vim.g.copilot_filetypes = {
+    ['*'] = false,
+    ['java'] = true,
+}