Add lsp and key mappings

lua/core/mappings.lua

@@ -14,33 +14,25 @@ end
 M.bufferline = function()
     local m = plugins.bufferline
 
-    map("n", m.nextBuffer, ":BufferLineCycleNext <CR>")
-    map("n", m.prevBuffer, ":BufferLineCyclePrev <CR>")
+    -- map("n", m.nextBuffer, ":BufferLineCycleNext <CR>")
 end
 
 M.gitsigns = function()
-    local m = plugins.gitsigns
-
-    map("n", m.blameLine, ":Gitsigns blame_line <CR>")
-    map("n", m.diffThis, ":Gitsigns diffthis <CR>")
+    -- map("n", m.blameLine, ":Gitsigns blame_line <CR>")
+    -- map("n", m.diffThis, ":Gitsigns diffthis <CR>")
 end
 
 M.nvimtree = function()
-    local m = plugins.nvimtree
-
-    map("n", m.toggle, ":NvimTreeToggle <CR>")
-    map("n", m.focus, ":NvimTreeFocus <CR>")
+    -- map("n", m.toggle, ":NvimTreeToggle <CR>")
+    -- map("n", m.focus, ":NvimTreeFocus <CR>")
 end
 
 M.telescope = function()
-    local m = plugins.telescope
-
-    map("n", m.buffers, ":Telescope buffers <CR>")
-    map("n", m.diagnostics, ":Telescope diagnostic <CR>")
-    map("n", m.liveGrep, ":Telescope live_grep <CR>")
-    map("n", m.files, ":Telescope find_files <CR>")
-    map("n", m.gitCommits, ":Telescope git_commits <CR>")
-    map("n", m.gitStatus, ":Telescope git_status <CR>")
+    -- map("n", m.buffers, ":Telescope buffers <CR>")
+    -- map("n", m.liveGrep, ":Telescope live_grep <CR>")
+    -- map("n", m.files, ":Telescope find_files <CR>")
+    -- map("n", m.gitCommits, ":Telescope git_commits <CR>")
+    -- map("n", m.gitStatus, ":Telescope git_status <CR>")
 end
 
 return M

lua/plugins/config/blankline.lua

@@ -1,7 +1,7 @@
 require("indent_blankline").setup {
     indentLine_enabled = 1,
     char = "▏",
-    filetype_exclude = {"help", "terminal", "dashboard", "nvimtree"},
+    filetype_exclude = {"help", "terminal", "alpha"},
     buftype_exclude = {"terminal"},
     show_trailing_blankline_indent = false,
     show_first_indent_level = false

lua/plugins/config/cmp.lua

@@ -0,0 +1,46 @@
+local cmp = require("cmp")
+
+cmp.setup {
+    snippet = {
+        expand = function(args)
+            require("luasnip").lsp_expand(args.body)
+        end
+    },
+    mapping = {
+        ["<C-p>"] = cmp.mapping.select_prev_item(),
+        ["<C-n>"] = cmp.mapping.select_next_item(),
+        ["<C-d>"] = cmp.mapping.scroll_docs(-4),
+        ["<C-f>"] = cmp.mapping.scroll_docs(4),
+        ["<C-Space>"] = cmp.mapping.complete(),
+        ["<C-e>"] = cmp.mapping.close(),
+        ["<CR>"] = cmp.mapping.confirm {
+            behavior = cmp.ConfirmBehavior.Replace,
+            select = true,
+        },
+        ["<Tab>"] = function(fallback)
+            if cmp.visible() then
+                cmp.select_next_item()
+            elseif require("luasnip").expand_or_jumpable() then
+                vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-expand-or-jump", true, true, true), "")
+            else
+                fallback()
+            end
+        end,
+        ["<S-Tab>"] = function(fallback)
+            if cmp.visible() then
+                cmp.select_prev_item()
+            elseif require("luasnip").jumpable(-1) then
+                vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-jump-prev", true, true, true), "")
+            else
+                fallback()
+            end
+        end
+    },
+    sources = {
+        { name = "nvim_lsp" },
+        { name = "luasnip" },
+        { name = "buffer" },
+        { name = "nvim_lua" },
+        { name = "path" }
+    }
+}

lua/plugins/config/luasnip.lua

@@ -0,0 +1,8 @@
+local luasnip = require("luasnip")
+
+luasnip.config.set_config {
+    history = true,
+    updateevents = "TextChanged,TextChangedI"
+}
+
+require("luasnip/loaders/from_vscode").load()

lua/plugins/config/nvimtree.lua

@@ -10,6 +10,11 @@ require("nvim-tree").setup {
     disable_netrw = true,
     ignore_ft_on_setup = { "dashboard" },
     hijack_cursor = true,
+    update_cwd = true,
+    update_focused_file = {
+        enable = true,
+        update_cwd = true
+    },
     git = {
         ignore = false
     },

lua/plugins/config/whichkey.lua

@@ -0,0 +1,35 @@
+local wk = require("which-key")
+
+wk.setup {
+    ignore_missing = true
+}
+
+wk.register({
+    ["<leader>"] = {
+        f = {
+            name = "Files",
+            f = { "<cmd>Telescope find_files<CR>", "Find File" },
+            g = { "<cmd>Telescope live_grep<CR>", "Live Grep" }
+        },
+        b = {
+            name = "Buffers",
+            b = { "<cmd>Telescope buffers<CR>", "Find Buffers" },
+            x = { "<cmd>BufDel<CR>", "Close Buffer" }
+        },
+        t = {
+            name = "NvimTree",
+            t = { "<cmd>NvimTreeToggle<CR>", "NvimTree Toggle" },
+            f = { "<cmd>NvimTreeFocus<CR>", "NvimTree Focus" }
+        }
+    },
+
+    g = {
+        name = "Git",
+        c = { "<cmd>Telescope git_commits<CR>", "Git Commits" },
+        s = { "<cmd>Telescope git_status<CR>", "Git Status" },
+        b = { "<cmd>Gitsigns blame_line<CR>", "Blame Line" },
+        d = { "<cmd>Gitsigns diffthis<CR>", "Diff This" }
+    },
+
+    ["<TAB>"] = { "<cmd>BufferLineCycleNext<CR>" }
+})

lua/plugins/setup.lua

@@ -82,7 +82,6 @@ require("packer").startup(function(use)
 
     use {
         "lukas-reineke/indent-blankline.nvim",
-        event = "BufRead",
         config = function()
             require("plugins.config.blankline")
         end
@@ -141,6 +140,114 @@ require("packer").startup(function(use)
         end
     }
 
+    -- LSP
+    use "neovim/nvim-lspconfig"
+
+    use {
+        "ray-x/lsp_signature.nvim",
+        after = "nvim-lspconfig",
+        config = function()
+            require("lsp_signature").setup()
+        end
+    }
+
+    use {
+        "rafamadriz/friendly-snippets",
+        module = "cmp_nvim_lsp",
+        event = "InsertCharPre"
+    }
+
+    use {
+        "hrsh7th/nvim-cmp",
+        after = "friendly-snippets",
+        config = function()
+            require("plugins.config.cmp")
+        end
+    }
+
+    use {
+        "L3MON4D3/LuaSnip",
+        wants = "friendly-snippets",
+        after = "nvim-cmp",
+        config = function()
+            require("plugins.config.luasnip")
+        end
+    }
+
+    use {
+        "saadparwaiz1/cmp_luasnip",
+        after = "LuaSnip"
+    }
+
+    use {
+        "hrsh7th/cmp-nvim-lua",
+        after = "cmp_luasnip"
+    }
+
+    use {
+        "hrsh7th/cmp-nvim-lsp",
+        after = "cmp-nvim-lua"
+    }
+
+    use {
+        "hrsh7th/cmp-buffer",
+        after = "cmp-nvim-lsp"
+    }
+
+    use {
+        "hrsh7th/cmp-path",
+        after = "cmp-buffer"
+    }
+
+    use {
+        "williamboman/nvim-lsp-installer",
+        requires = "neovim/nvim-lspconfig",
+        config = function()
+            local lspInstaller = require("nvim-lsp-installer")
+
+            lspInstaller.on_server_ready(function(server)
+                local opts = {}
+                server:setup(opts)
+                vim.cmd [[ do User LspAttachBuffers ]]
+            end)
+        end
+    }
+
+    use {
+        "windwp/nvim-autopairs",
+        config = function()
+            require("nvim-autopairs").setup()
+        end
+    }
+
+    use {
+        "simrat39/symbols-outline.nvim",
+        cmd = "SymbolsOutline"
+    }
+
+    use {
+        "folke/trouble.nvim",
+        requires = "kyazdani42/nvim-web-devicons",
+        config = function()
+            require("trouble").setup()
+        end
+    }
+
+    use {
+        "goolord/alpha-nvim",
+        requires = "kyazdani42/nvim-web-devicons",
+        config = function()
+            require("alpha").setup(require("alpha.themes.dashboard").config)
+        end
+    }
+
+    use {
+        "folke/which-key.nvim",
+        config = function()
+            require("plugins.config.whichkey")
+        end
+    }
+
     if packer_bootstrap then
         require("packer").sync()
     end