init.lua

vim.g.mapleader = ' '
vim.g.maplocalleader = ' '

-- Disable folding
vim.opt.foldenable = false
vim.opt.foldmethod = 'manual'
vim.opt.foldlevelstart = 99

-- Disable netrw because of nvim-tree
vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1
vim.opt.termguicolors = true

-- Enable Nerd Fonts
vim.g.have_nerd_font = true

-- Configure line numbers
vim.opt.number = true
vim.opt.relativenumber = true

-- Enable mouse mode
vim.opt.mouse = 'a'

-- Don't show the mode, since it's already in the status line
vim.opt.showmode = false

-- Sync clipboard between OS and Neovim.
vim.schedule(function()
  vim.opt.clipboard = 'unnamedplus'
end)

-- Enable break indent
vim.opt.breakindent = true

-- Save undo history
vim.opt.undofile = true

-- Case-insensitive searching UNLESS \C or one or more capital letters in the search term
vim.opt.ignorecase = true
vim.opt.smartcase = true

-- Keep signcolumn on by default
vim.opt.signcolumn = 'yes'

-- Decrease update time
vim.opt.updatetime = 250

-- Decrease mapped sequence wait time
vim.opt.timeoutlen = 300

-- Preview substitutions live, as you type!
vim.opt.inccommand = 'split'

-- Show which line your cursor is on
vim.opt.cursorline = true

-- Minimal number of screen lines to keep above and below the cursor.
vim.opt.scrolloff = 10

-- Automatically resize all buffers if terminal window gets resized
vim.api.nvim_command 'autocmd VimResized * wincmd ='

-- Enable colorcolumn
vim.opt.colorcolumn = '100'

-- [[ Autocommands ]]

vim.api.nvim_create_autocmd('TextYankPost', {
  desc = 'Highlight when yanking (copying) text',
  group = vim.api.nvim_create_augroup('kickstart-highlight-yank', { clear = true }),
  callback = function()
    vim.highlight.on_yank()
  end,
})

-- [[ Basic Keymaps ]]

vim.keymap.set('n', '<Esc>', '<cmd>nohlsearch<CR>')
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })
vim.keymap.set('n', '<C-h>', '<C-w><C-h>', { desc = 'Move focus to the left window' })
vim.keymap.set('n', '<C-l>', '<C-w><C-l>', { desc = 'Move focus to the right window' })
vim.keymap.set('n', '<C-j>', '<C-w><C-j>', { desc = 'Move focus to the lower window' })
vim.keymap.set('n', '<C-k>', '<C-w><C-k>', { desc = 'Move focus to the upper window' })

-- File Tree Keymaps
vim.keymap.set('n', '<leader>n', ':NvimTreeToggle<CR>', { noremap = true, silent = true })

-- [[ Install `lazy.nvim` plugin manager ]]

local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  local lazyrepo = 'https://github.com/folke/lazy.nvim.git'
  local out = vim.fn.system { 'git', 'clone', '--filter=blob:none', '--branch=stable', lazyrepo, lazypath }
  if vim.v.shell_error ~= 0 then
    error('Error cloning lazy.nvim:\n' .. out)
  end
end ---@diagnostic disable-next-line: undefined-field
vim.opt.rtp:prepend(lazypath)

-- [[ Configure and install plugins ]]
require('lazy').setup {
  'tpope/vim-sleuth', -- Detect tabstop and shiftwidth automatically
  { -- Adds git related signs to the gutter, as well as utilities for managing changes
    'lewis6991/gitsigns.nvim',
    opts = {
      signs = {
        add = { text = '+' },
        change = { text = '~' },
        delete = { text = '_' },
        topdelete = { text = '‾' },
        changedelete = { text = '~' },
      },
    },
  },
  { -- Fuzzy Finder (files, lsp, etc)
    'nvim-telescope/telescope.nvim',
    event = 'VimEnter',
    branch = '0.1.x',
    dependencies = {
      'nvim-lua/plenary.nvim',
      {
        'nvim-telescope/telescope-fzf-native.nvim',
        build = 'make',
        cond = function()
          return vim.fn.executable 'make' == 1
        end,
      },
      { 'nvim-telescope/telescope-ui-select.nvim' },
      { 'nvim-tree/nvim-web-devicons', enabled = vim.g.have_nerd_font },
    },
    config = function()
      require('telescope').setup {
        extensions = {
          ['ui-select'] = {
            require('telescope.themes').get_dropdown(),
          },
        },
      }

      -- Enable Telescope extensions if they are installed
      pcall(require('telescope').load_extension, 'fzf')
      pcall(require('telescope').load_extension, 'ui-select')

      local builtin = require 'telescope.builtin'
      vim.keymap.set('n', '<leader>sh', builtin.help_tags, { desc = '[S]earch [H]elp' })
      vim.keymap.set('n', '<leader>sk', builtin.keymaps, { desc = '[S]earch [K]eymaps' })
      vim.keymap.set('n', '<leader>sf', builtin.find_files, { desc = '[S]earch [F]iles' })
      vim.keymap.set('n', '<leader>ss', builtin.builtin, { desc = '[S]earch [S]elect Telescope' })
      vim.keymap.set('n', '<leader>sw', builtin.grep_string, { desc = '[S]earch current [W]ord' })
      vim.keymap.set('n', '<leader>sg', builtin.live_grep, { desc = '[S]earch by [G]rep' })
      vim.keymap.set('n', '<leader>sd', builtin.diagnostics, { desc = '[S]earch [D]iagnostics' })
      vim.keymap.set('n', '<leader>sr', builtin.resume, { desc = '[S]earch [R]esume' })
      vim.keymap.set('n', '<leader>s.', builtin.oldfiles, { desc = '[S]earch Recent Files ("." for repeat)' })
      vim.keymap.set('n', '<leader><leader>', builtin.buffers, { desc = '[ ] Find existing buffers' })

      vim.keymap.set('n', '<leader>/', function()
        builtin.current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
          winblend = 10,
          previewer = false,
        })
      end, { desc = '[/] Fuzzily search in current buffer' })

      vim.keymap.set('n', '<leader>s/', function()
        builtin.live_grep {
          grep_open_files = true,
          prompt_title = 'Live Grep in Open Files',
        }
      end, { desc = '[S]earch [/] in Open Files' })

      vim.keymap.set('n', '<leader>sn', function()
        builtin.find_files { cwd = vim.fn.stdpath 'config' }
      end, { desc = '[S]earch [N]eovim files' })
    end,
  },
  -- LSP Plugins
  {
    'folke/lazydev.nvim',
    ft = 'lua',
    opts = {
      library = {
        -- Load luvit types when the `vim.uv` word is found
        { path = '${3rd}/luv/library', words = { 'vim%.uv' } },
      },
    },
  },
  {
    -- Main LSP Configuration
    'neovim/nvim-lspconfig',
    dependencies = {
      { 'williamboman/mason.nvim', opts = {} },
      'williamboman/mason-lspconfig.nvim',
      'WhoIsSethDaniel/mason-tool-installer.nvim',
      { 'j-hui/fidget.nvim', opts = {} },
      'hrsh7th/cmp-nvim-lsp',
    },
    config = function()
      vim.api.nvim_create_autocmd('LspAttach', {
        group = vim.api.nvim_create_augroup('kickstart-lsp-attach', { clear = true }),
        callback = function(event)
          local map = function(keys, func, desc, mode)
            mode = mode or 'n'
            vim.keymap.set(mode, keys, func, { buffer = event.buf, desc = 'LSP: ' .. desc })
          end

          map('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
          map('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
          map('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
          map('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')
          map('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
          map('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')
          map('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
          map('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction', { 'n', 'x' })
          map('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')

          local client = vim.lsp.get_client_by_id(event.data.client_id)
          if client and client.supports_method(vim.lsp.protocol.Methods.textDocument_documentHighlight) then
            local highlight_augroup = vim.api.nvim_create_augroup('kickstart-lsp-highlight', { clear = false })
            vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
              buffer = event.buf,
              group = highlight_augroup,
              callback = vim.lsp.buf.document_highlight,
            })

            vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI' }, {
              buffer = event.buf,
              group = highlight_augroup,
              callback = vim.lsp.buf.clear_references,
            })

            vim.api.nvim_create_autocmd('LspDetach', {
              group = vim.api.nvim_create_augroup('kickstart-lsp-detach', { clear = true }),
              callback = function(event2)
                vim.lsp.buf.clear_references()
                vim.api.nvim_clear_autocmds { group = 'kickstart-lsp-highlight', buffer = event2.buf }
              end,
            })
          end

          if client and client.supports_method(vim.lsp.protocol.Methods.textDocument_inlayHint) then
            map('<leader>th', function()
              vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled { bufnr = event.buf })
            end, '[T]oggle Inlay [H]ints')
          end
        end,
      })

      -- Change diagnostic symbols in the sign column (gutter)
      if vim.g.have_nerd_font then
        local signs = { ERROR = '', WARN = '', INFO = '', HINT = '' }
        local diagnostic_signs = {}
        for type, icon in pairs(signs) do
          diagnostic_signs[vim.diagnostic.severity[type]] = icon
        end
        vim.diagnostic.config { signs = { text = diagnostic_signs } }
      end

      local capabilities = vim.lsp.protocol.make_client_capabilities()
      capabilities = vim.tbl_deep_extend('force', capabilities, require('cmp_nvim_lsp').default_capabilities())

      local servers = {
        gopls = {
          settings = {
            gopls = {
              usePlaceholders = true,
            },
          },
        },
        lua_ls = {
          settings = {
            Lua = {
              completion = {
                callSnippet = 'Replace',
              },
            },
          },
        },
      }

      -- Ensure the servers and tools above are installed
      local ensure_installed = vim.tbl_keys(servers or {})
      vim.list_extend(ensure_installed, {
        'stylua', -- Used to format Lua code
      })
      require('mason-tool-installer').setup { ensure_installed = ensure_installed }

      require('mason-lspconfig').setup {
        handlers = {
          function(server_name)
            local server = servers[server_name] or {}
            server.capabilities = vim.tbl_deep_extend('force', {}, capabilities, server.capabilities or {})
            require('lspconfig')[server_name].setup(server)
          end,
        },
      }
    end,
  },
  { -- Autoformat
    'stevearc/conform.nvim',
    event = { 'BufWritePre' },
    cmd = { 'ConformInfo' },
    keys = {
      {
        '<leader>f',
        function()
          require('conform').format { async = true, lsp_format = 'fallback' }
        end,
        mode = '',
        desc = '[F]ormat buffer',
      },
    },
    opts = {
      notify_on_error = false,
      format_on_save = function()
        return {
          timeout_ms = 500,
          lsp_format = 'fallback',
        }
      end,
      formatters_by_ft = {
        lua = { 'stylua' },
        go = { 'gofmt' },
      },
    },
  },
  { -- Autocompletion
    'hrsh7th/nvim-cmp',
    event = 'InsertEnter',
    dependencies = {
      'L3MON4D3/LuaSnip',
      'saadparwaiz1/cmp_luasnip',
      'hrsh7th/cmp-nvim-lsp',
      'hrsh7th/cmp-path',
    },
    config = function()
      local cmp = require 'cmp'
      local luasnip = require 'luasnip'
      luasnip.config.setup {}

      cmp.setup {
        snippet = {
          expand = function(args)
            luasnip.lsp_expand(args.body)
          end,
        },
        completion = { completeopt = 'menu,menuone,noinsert' },
        mapping = cmp.mapping.preset.insert {
          -- Select the [n]ext item
          ['<C-n>'] = cmp.mapping.select_next_item(),
          -- Select the [p]revious item
          ['<C-p>'] = cmp.mapping.select_prev_item(),

          -- Scroll the documentation window [b]ack / [f]orward
          ['<C-b>'] = cmp.mapping.scroll_docs(-4),
          ['<C-f>'] = cmp.mapping.scroll_docs(4),

          -- Accept ([y]es) the completion.
          ['<C-y>'] = cmp.mapping.confirm { select = true },

          -- Think of <c-l> as moving to the right of your snippet expansion.
          --  So if you have a snippet that's like:
          --  function $name($args)
          --    $body
          --  end
          --
          -- <c-l> will move you to the right of each of the expansion locations.
          -- <c-h> is similar, except moving you backwards.
          ['<C-l>'] = cmp.mapping(function()
            if luasnip.expand_or_locally_jumpable() then
              luasnip.expand_or_jump()
            end
          end, { 'i', 's' }),
          ['<C-h>'] = cmp.mapping(function()
            if luasnip.locally_jumpable(-1) then
              luasnip.jump(-1)
            end
          end, { 'i', 's' }),
        },
        sources = {
          {
            name = 'lazydev',
            group_index = 0,
          },
          { name = 'nvim_lsp' },
          { name = 'luasnip' },
          { name = 'path' },
        },
      }
    end,
  },
  { -- Colorscheme.
    'sainnhe/gruvbox-material',
    priority = 1000,
    init = function()
      vim.cmd.colorscheme 'gruvbox-material'
    end,
  },
  { -- Status line
    'nvim-lualine/lualine.nvim',
    dependencies = { 'nvim-tree/nvim-web-devicons' },
    config = function()
      require('lualine').setup {
        extensions = { 'nvim-tree' },
        options = { theme = 'gruvbox-material' },
        sections = {
          lualine_c = {
            {
              'filename',
              file_status = true, -- displays file status (readonly status, modified status)
              path = 2, -- 0 = just filename, 1 = relative path, 2 = absolute path
            },
          },
        },
      }
    end,
  },
  { -- Highlight, edit, and navigate code
    'nvim-treesitter/nvim-treesitter',
    build = ':TSUpdate',
    main = 'nvim-treesitter.configs',
    opts = {
      ensure_installed = {
        'go',
        'gomod',
        'bash',
        'diff',
        'html',
        'lua',
        'luadoc',
        'markdown',
        'markdown_inline',
        'query',
        'vim',
        'vimdoc',
        'json',
      },
      auto_install = true,
      highlight = {
        enable = true,
      },
      indent = { enable = true },
    },
  },
  { -- File Tree
    'nvim-tree/nvim-tree.lua',
    dependencies = { 'nvim-tree/nvim-web-devicons' },
    config = function()
      require('nvim-tree').setup {
        sort_by = 'case_sensitive',
        filters = {
          dotfiles = true,
        },
        on_attach = function(bufnr)
          local api = require 'nvim-tree.api'

          local function opts(desc)
            return {
              desc = 'nvim-tree: ' .. desc,
              buffer = bufnr,
              noremap = true,
              silent = true,
              nowait = true,
            }
          end

          api.config.mappings.default_on_attach(bufnr)
          vim.keymap.set('n', 's', api.node.open.vertical, opts 'Open: Vertical Split')
          vim.keymap.set('n', 'i', api.node.open.horizontal, opts 'Open: Horizontal Split')
          vim.keymap.set('n', 'u', api.tree.change_root_to_parent, opts 'Up')
        end,
      }
    end,
  },
  { -- Commenting out lines
    'numToStr/Comment.nvim',
    config = function()
      require('Comment').setup()
    end,
  },
  { -- Git integration
    'dinhhuy258/git.nvim',
    config = function()
      require('git').setup()
    end,
  },
  { -- Markdown rendering support
    'MeanderingProgrammer/render-markdown.nvim',
    dependencies = { 'nvim-treesitter/nvim-treesitter', 'nvim-tree/nvim-web-devicons' },
  },
  { -- Debugger
    'mfussenegger/nvim-dap',
    dependencies = {
      'rcarriga/nvim-dap-ui',
      'nvim-neotest/nvim-nio',
      'williamboman/mason.nvim',
      'jay-babu/mason-nvim-dap.nvim',
      'leoluz/nvim-dap-go',
    },
    keys = {
      {
        '<F5>',
        function()
          require('dap').continue()
        end,
        desc = 'Debug: Start/Continue',
      },
      {
        '<F1>',
        function()
          require('dap').step_into()
        end,
        desc = 'Debug: Step Into',
      },
      {
        '<F2>',
        function()
          require('dap').step_over()
        end,
        desc = 'Debug: Step Over',
      },
      {
        '<F3>',
        function()
          require('dap').step_out()
        end,
        desc = 'Debug: Step Out',
      },
      {
        '<leader>b',
        function()
          require('dap').toggle_breakpoint()
        end,
        desc = 'Debug: Toggle Breakpoint',
      },
      {
        '<leader>B',
        function()
          require('dap').set_breakpoint(vim.fn.input 'Breakpoint condition: ')
        end,
        desc = 'Debug: Set Breakpoint',
      },
      {
        '<F7>',
        function()
          require('dapui').toggle()
        end,
        desc = 'Debug: See last session result.',
      },
      {
        '<leader>dgt',
        function()
          require('dap-go').debug_test()
        end,
        desc = 'Debug: Test under cursor',
      },
    },
    config = function()
      local dap = require 'dap'
      local dapui = require 'dapui'

      require('mason-nvim-dap').setup {
        automatic_installation = true,
        handlers = {},
        ensure_installed = {
          'delve',
        },
      }

      dapui.setup()

      dap.listeners.after.event_initialized['dapui_config'] = dapui.open
      dap.listeners.before.event_terminated['dapui_config'] = dapui.close
      dap.listeners.before.event_exited['dapui_config'] = dapui.close

      require('dap-go').setup()
    end,
  },
  { -- Testing support
    'nvim-neotest/neotest',
    dependencies = {
      'nvim-neotest/nvim-nio',
      'nvim-lua/plenary.nvim',
      'antoinemadec/FixCursorHold.nvim',
      'nvim-treesitter/nvim-treesitter',
      { 'fredrikaverpil/neotest-golang', version = '*' },
    },
    config = function()
      local neotest_golang_opts = {
        go_test_args = { '-v', '-count=1' },
      }
      local nt = require 'neotest'
      nt.setup {
        adapters = {
          require 'neotest-golang'(neotest_golang_opts),
        },
      }

      vim.keymap.set('n', '<leader>rnt', function()
        nt.run.run()
      end, { desc = 'Testing: Run the nearest test' })
    end,
  },
  { -- Go Support
    'olexsmir/gopher.nvim',
    ft = 'go',
    dependencies = {
      'nvim-lua/plenary.nvim',
      'nvim-treesitter/nvim-treesitter',
    },
    build = function()
      vim.cmd [[silent! GoInstallDeps]]
    end,
    config = function(_, opts)
      require('gopher').setup(opts)

      vim.keymap.set('n', '<leader>gsj', '<cmd> GoTagAdd json <CR>', {
        noremap = true,
        desc = 'Add JSON Struct tags',
      })

      vim.keymap.set('n', '<leader>gsy', '<cmd> GoTagAdd yaml <CR>', {
        noremap = true,
        desc = 'Add YAML Struct tags',
      })
    end,
  },
  { -- vim and tmux integration
    'christoomey/vim-tmux-navigator',
    cmd = {
      'TmuxNavigateLeft',
      'TmuxNavigateDown',
      'TmuxNavigateUp',
      'TmuxNavigateRight',
    },
    keys = {
      { '<c-h>', '<cmd><C-U>TmuxNavigateLeft<cr>' },
      { '<c-j>', '<cmd><C-U>TmuxNavigateDown<cr>' },
      { '<c-k>', '<cmd><C-U>TmuxNavigateUp<cr>' },
      { '<c-l>', '<cmd><C-U>TmuxNavigateRight<cr>' },
    },
  },
}