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

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vim.g.have_nerd_font = true

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-- Make line numbers default
vim.o.number = true
-- You can also add relative line numbers, to help with jumping.
--  Experiment for yourself to see if you like it!
vim.o.relativenumber = true

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-- Enable mouse mode, can be useful for resizing splits for example!
vim.o.mouse = 'a'

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

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-- Enable break indent
-- Avoid braaking lines in the middle of a word
vim.o.breakindent = true
vim.opt.linebreak = true

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

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

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

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

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

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-- Configure how new splits should be opened
vim.o.splitright = true
vim.o.splitbelow = true

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--  Notice listchars is set using `vim.opt` instead of `vim.o`.
--  It is very similar to `vim.o` but offers an interface for conveniently interacting with tables.
--   See `:help lua-options`
--   and `:help lua-options-guide`
vim.o.list = true
vim.opt.listchars = {tab = '» ', trail = '·', nbsp = '␣' }

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

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

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

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-- if performing an operation that would fail due to unsaved changes in the buffer (like `:q`),
-- instead raise a dialog asking if you wish to save the current file(s)
-- See `:help 'confirm'`
vim.o.confirm = true

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-- Clear highlights on search when pressing <Esc> in normal mode
--  See `:help hlsearch`
vim.keymap.set('n', '<Esc>', '<cmd>nohlsearch<CR>')

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-- Diagnostic keymaps
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostic [Q]uickfix list' })

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-- Exit terminal mode in the builtin terminal with a shortcut that is a bit easier
-- for people to discover. Otherwise, you normally need to press <C-\><C-n>, which
-- is not what someone will guess without a bit more experience.
--
-- NOTE: This won't work in all terminal emulators/tmux/etc. Try your own mapping
-- or just use <C-\><C-n> to exit terminal mode
vim.keymap.set('t', '<Esc><Esc>', '<C-\\><C-n>', { desc = 'Exit terminal mode' })

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-- Highlight when yanking (copying) text
--  Try it with `yap` in normal mode
--  See `:help vim.hl.on_yank()`
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.hl.on_yank()
  end,
})

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-- augroup for this config file
local augroup = vim.api.nvim_create_augroup('init.lua', {})

-- wrapper function to use internal augroup
local function create_autocmd(event, opts)
  vim.api.nvim_create_autocmd(
    event,
    vim.tbl_extend('force', {
      group = augroup,
    }, opts)
  )
end
-- https://vim-jp.org/vim-users-jp/2011/02/20/Hack-202.html
create_autocmd('BufWritePre', {
  pattern = '*',
  callback = function(event)
    local dir = vim.fs.dirname(event.file)
    local force = vim.v.cmdbang == 1
    if not vim.bool_fn.isdirectory(dir) and (force or vim.fn.confirm('"' .. dir .. '"dose not exist. Create?', '&Yes\n&No') == 1) then
      vim.fn.mkdir(vim.fn.iconv(dir, vim.opt.encoding:get(), vim.opt.termencoding:get()), 'p')
    end
  end,
  desc = 'Auto mkdir to save file',
})

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-- Open init.lua(kickstart) by :Initlua
vim.api.nvim_create_user_command(
  'InitLua',
  function()
    vim.cmd.edit( '~/.config/nvim-kickstart/init.lua')
  end,
  { desc = 'Open init.lua(kickstart)' }
)

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local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'

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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

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---@type vim.Option
local rtp = vim.opt.rtp
rtp:prepend(lazypath)

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  { -- 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 = '~' },
      },
    },
  },

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  -- NOTE: Plugins can also be configured to run Lua code when they are loaded.
  --
  -- This is often very useful to both group configuration, as well as handle
  -- lazy loading plugins that don't need to be loaded immediately at startup.
  --
  -- For example, in the following configuration, we use:
  --  event = 'VimEnter'
  --
  -- which loads which-key before all the UI elements are loaded. Events can be
  -- normal autocommands events (`:help autocmd-events`).
  --
  -- Then, because we use the `opts` key (recommended), the configuration runs
  -- after the plugin has been loaded as `require(MODULE).setup(opts)`.

  { -- Useful plugin to show you pending keybinds.
    'folke/which-key.nvim',
    event = 'VimEnter', -- Sets the loading event to 'VimEnter'
    opts = {
      -- delay between pressing a key and opening which-key (milliseconds)
      -- this setting is independent of vim.o.timeoutlen
      delay = 0,
      icons = {
        -- set icon mappings to true if you have a Nerd Font
        mappings = vim.g.have_nerd_font,
        -- If you are using a Nerd Font: set icons.keys to an empty table which will use the
        -- default which-key.nvim defined Nerd Font icons, otherwise define a string table
        keys = vim.g.have_nerd_font and {} or {
          Up = '<Up> ',
          Down = '<Down> ',
          Left = '<Left> ',
          Right = '<Right> ',
          C = '<C-…> ',
          M = '<M-…> ',
          D = '<D-…> ',
          S = '<S-…> ',
          CR = '<CR> ',
          Esc = '<Esc> ',
          ScrollWheelDown = '<ScrollWheelDown> ',
          ScrollWheelUp = '<ScrollWheelUp> ',
          NL = '<NL> ',
          BS = '<BS> ',
          Space = '<Space> ',
          Tab = '<Tab> ',
          F1 = '<F1>',
          F2 = '<F2>',
          F3 = '<F3>',
          F4 = '<F4>',
          F5 = '<F5>',
          F6 = '<F6>',
          F7 = '<F7>',
          F8 = '<F8>',
          F9 = '<F9>',
          F10 = '<F10>',
          F11 = '<F11>',
          F12 = '<F12>',
        },
      },

      -- Document existing key chains
      spec = {
        { '<leader>s', group = '[S]earch' },
        { '<leader>t', group = '[T]oggle' },
        { '<leader>h', group = 'Git [H]unk', mode = { 'n', 'v' } },
      },
    },
  },

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  { -- Fuzzy Finder (files, lsp, etc)
    'nvim-telescope/telescope.nvim',
    event = 'VimEnter',
    dependencies = {
      'nvim-lua/plenary.nvim',
      { -- If encountering errors, see telescope-fzf-native README for installation instructions
        'nvim-telescope/telescope-fzf-native.nvim',

        -- `build` is used to run some command when the plugin is installed/updated.
        -- This is only run then, not every time Neovim starts up.
        build = 'make',

        -- `cond` is a condition used to determine whether this plugin should be
        -- installed and loaded.
        cond = function()
          return vim.fn.executable 'make' == 1
        end,
      },
      { 'nvim-telescope/telescope-ui-select.nvim' },

      -- Useful for getting pretty icons, but requires a Nerd Font.
      { 'nvim-tree/nvim-web-devicons', enabled = vim.g.have_nerd_font },
    },
    config = function()
      -- Telescope is a fuzzy finder that comes with a lot of different things that
      -- it can fuzzy find! It's more than just a "file finder", it can search
      -- many different aspects of Neovim, your workspace, LSP, and more!
      --
      -- The easiest way to use Telescope, is to start by doing something like:
      --  :Telescope help_tags
      --
      -- After running this command, a window will open up and you're able to
      -- type in the prompt window. You'll see a list of `help_tags` options and
      -- a corresponding preview of the help.
      --
      -- Two important keymaps to use while in Telescope are:
      --  - Insert mode: <c-/>
      --  - Normal mode: ?
      --
      -- This opens a window that shows you all of the keymaps for the current
      -- Telescope picker. This is really useful to discover what Telescope can
      -- do as well as how to actually do it!

      -- [[ Configure Telescope ]]
      -- See `:help telescope` and `:help telescope.setup()`
            require('telescope').setup {
        -- You can put your default mappings / updates / etc. in here
        --  All the info you're looking for is in `:help telescope.setup()`
        --
        -- defaults = {
        --   mappings = {
        --     i = { ['<c-enter>'] = 'to_fuzzy_refine' },
        --   },
        -- },

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      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' })

      -- Slightly advanced example of overriding default behavior and theme
      vim.keymap.set('n', '<leader>/', function()
        -- You can pass additional configuration to Telescope to change the theme, layout, etc.
        builtin.current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
          winblend = 10,
          previewer = false,
        })
      end, { desc = '[/] Fuzzily search in current buffer' })

      -- It's also possible to pass additional configuration options.
      --  See `:help telescope.builtin.live_grep()` for information about particular keys
      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' })

      -- Shortcut for searching your Neovim configuration files
      vim.keymap.set('n', '<leader>sn', function()
        builtin.find_files { cwd = vim.fn.stdpath 'config' }
      end, { desc = '[S]earch [N]eovim files' })
    end,
  },

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  { -- 2. mini.files の追加
    'echasnovski/mini.files',
    version = '*',
    config = function()
      require('mini.files').setup()

      -- 使いやすいようにキーマップを設定 (例: <leader>f)
      vim.keymap.set('n', '<leader>e', function()
        if not require('mini.files').close() then
          require('mini.files').open(vim.api.nvim_buf_get_name(0), true)
        end
      end, { desc = 'Open mini.files (Directory of current file)' })
    end,
  },
  { -- 3. mini.tabline の追加
    'echasnovski/mini.tabline',
    version = '*',
    opts = {}, -- デフォルト設定で動作
  },

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  {
    -- `lazydev` configures Lua LSP for your Neovim config, runtime and plugins
    -- used for completion, annotations and signatures of Neovim apis
    'folke/lazydev.nvim',
    ft = 'lua',
    opts = {
      library = {
        -- Load luvit types when the `vim.uv` word is found
        { path = '${3rd}/luv/library', words = { 'vim%.uv' } },
      },
    },
  },

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  {
    -- Main LSP Configuration
    'neovim/nvim-lspconfig',
    dependencies = {
      -- Automatically install LSPs and related tools to stdpath for Neovim
      -- Mason must be loaded before its dependents so we need to set it up here.
      -- NOTE: `opts = {}` is the same as calling `require('mason').setup({})`
      { 'mason-org/mason.nvim', opts = {} },
      'mason-org/mason-lspconfig.nvim',
      'WhoIsSethDaniel/mason-tool-installer.nvim',

      -- Useful status updates for LSP.
      { 'j-hui/fidget.nvim', opts = {} },

      -- Allows extra capabilities provided by blink.cmp
      'saghen/blink.cmp',
    },

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    config = function()
      -- Brief aside: **What is LSP?**
      --
      -- LSP is an initialism you've probably heard, but might not understand what it is.
      --
      -- LSP stands for Language Server Protocol. It's a protocol that helps editors
      -- and language tooling communicate in a standardized fashion.
      --
      -- In general, you have a "server" which is some tool built to understand a particular
      -- language (such as `gopls`, `lua_ls`, `rust_analyzer`, etc.). These Language Servers
      -- (sometimes called LSP servers, but that's kind of like ATM Machine) are standalone
      -- processes that communicate with some "client" - in this case, Neovim!
      --
      -- LSP provides Neovim with features like:
      --  - Go to definition
      --  - Find references
      --  - Autocompletion
      --  - Symbol Search
      --  - and more!
      --
      -- Thus, Language Servers are external tools that must be installed separately from
      -- Neovim. This is where `mason` and related plugins come into play.
      --
      -- If you're wondering about lsp vs treesitter, you can check out the wonderfully
      -- and elegantly composed help section, `:help lsp-vs-treesitter`

      --  This function gets run when an LSP attaches to a particular buffer.
      --    That is to say, every time a new file is opened that is associated with
      --    an lsp (for example, opening `main.rs` is associated with `rust_analyzer`) this
      --    function will be executed to configure the current buffer
      vim.api.nvim_create_autocmd('LspAttach', {
        group = vim.api.nvim_create_augroup('kickstart-lsp-attach', { clear = true }),
        callback = function(event)
          -- NOTE: Remember that Lua is a real programming language, and as such it is possible
          -- to define small helper and utility functions so you don't have to repeat yourself.
          --
          -- In this case, we create a function that lets us more easily define mappings specific
          -- for LSP related items. It sets the mode, buffer and description for us each time.
          local map = function(keys, func, desc, mode)
            mode = mode or 'n'
            vim.keymap.set(mode, keys, func, { buffer = event.buf, desc = 'LSP: ' .. desc })
          end

          -- Rename the variable under your cursor.
          --  Most Language Servers support renaming across files, etc.
          map('grn', vim.lsp.buf.rename, '[R]e[n]ame')

          -- Execute a code action, usually your cursor needs to be on top of an error
          -- or a suggestion from your LSP for this to activate.
          map('gra', vim.lsp.buf.code_action, '[G]oto Code [A]ction', { 'n', 'x' })

          -- Find references for the word under your cursor.
          map('grr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')

          -- Jump to the implementation of the word under your cursor.
          --  Useful when your language has ways of declaring types without an actual implementation.
          map('gri', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')

          -- Jump to the definition of the word under your cursor.
          --  This is where a variable was first declared, or where a function is defined, etc.
          --  To jump back, press <C-t>.
          map('grd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')

          -- WARN: This is not Goto Definition, this is Goto Declaration.
          --  For example, in C this would take you to the header.
          map('grD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')

          -- Fuzzy find all the symbols in your current document.
          --  Symbols are things like variables, functions, types, etc.
          map('gO', require('telescope.builtin').lsp_document_symbols, 'Open Document Symbols')

          -- Fuzzy find all the symbols in your current workspace.
          --  Similar to document symbols, except searches over your entire project.
          map('gW', require('telescope.builtin').lsp_dynamic_workspace_symbols, 'Open Workspace Symbols')

          -- Jump to the type of the word under your cursor.
          --  Useful when you're not sure what type a variable is and you want to see
          --  the definition of its *type*, not where it was *defined*.
          map('grt', require('telescope.builtin').lsp_type_definitions, '[G]oto [T]ype Definition')

          -- This function resolves a difference between neovim nightly (version 0.11) and stable (version 0.10)
          ---@param client any
          ---@param method any
          ---@param bufnr? integer some lsp support methods only in specific files
          ---@return boolean
          local function client_supports_method(client, method, bufnr)
            if vim.fn.has 'nvim-0.11' == 1 then
              return client:supports_method(method, bufnr)
            else
              return client:supports_method(method, { bufnr = bufnr })
            end
          end

          -- The following two autocommands are used to highlight references of the
          -- word under your cursor when your cursor rests there for a little while.
          --    See `:help CursorHold` for information about when this is executed
          --
          -- When you move your cursor, the highlights will be cleared (the second autocommand).
          local client = vim.lsp.get_client_by_id(event.data.client_id)
          if client and client_supports_method(client, vim.lsp.protocol.Methods.textDocument_documentHighlight, event.buf) 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

          -- The following code creates a keymap to toggle inlay hints in your
          -- code, if the language server you are using supports them
          --
          -- This may be unwanted, since they displace some of your code
          if client and client_supports_method(client, vim.lsp.protocol.Methods.textDocument_inlayHint, event.buf) 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,
      })

      -- Diagnostic Config
      -- See :help vim.diagnostic.Opts
      vim.diagnostic.config {
        severity_sort = true,
        float = { border = 'rounded', source = 'if_many' },
        underline = { severity = vim.diagnostic.severity.ERROR },
        signs = vim.g.have_nerd_font and {
          text = {
            [vim.diagnostic.severity.ERROR] = '󰅚 ',
            [vim.diagnostic.severity.WARN] = '󰀪 ',
            [vim.diagnostic.severity.INFO] = '󰋽 ',
            [vim.diagnostic.severity.HINT] = '󰌶 ',
          },
        } or {},
        virtual_text = {
          source = 'if_many',
          spacing = 2,
          format = function(diagnostic)
            local diagnostic_message = {
              [vim.diagnostic.severity.ERROR] = diagnostic.message,
              [vim.diagnostic.severity.WARN] = diagnostic.message,
              [vim.diagnostic.severity.INFO] = diagnostic.message,
              [vim.diagnostic.severity.HINT] = diagnostic.message,
            }
            return diagnostic_message[diagnostic.severity]
          end,
        },
      }

      -- LSP servers and clients are able to communicate to each other what features they support.
      --  By default, Neovim doesn't support everything that is in the LSP specification.
      --  When you add blink.cmp, luasnip, etc. Neovim now has *more* capabilities.
      --  So, we create new capabilities with blink.cmp, and then broadcast that to the servers.
      local capabilities = require('blink.cmp').get_lsp_capabilities()

      -- Enable the following language servers
      --  Feel free to add/remove any LSPs that you want here. They will automatically be installed.
      --
      --  Add any additional override configuration in the following tables. Available keys are:
      --  - cmd (table): Override the default command used to start the server
      --  - filetypes (table): Override the default list of associated filetypes for the server
      --  - capabilities (table): Override fields in capabilities. Can be used to disable certain LSP features.
      --  - settings (table): Override the default settings passed when initializing the server.
      --        For example, to see the options for `lua_ls`, you could go to: https://luals.github.io/wiki/settings/
      local servers = {
        clangd = {
          capabilities = {
            offsetEncoding = { 'utf-16' },
          },
        },
        gopls = {
          settings = {
            gopls = {
              hints = {
                assignVariableTypes = true,
                compositeLiteralFields = true,
                parameterNames = true,
              },
              analyses = {
                unusedparams = true,
              },
              staticcheck = true,
            },
          },
        },
        pyright = {
          settings = {
            python = {
              analysis = {
                typeCheckingMode = 'basic', -- 'strict'（厳格）にも変更可能
                autoSearchPaths = true,
                useLibraryCodeForTypes = true,
              },
            },
          },
        },
        rust_analyzer = {
          settings = {
            ['rust-analyzer'] = {
              checkOnSave = {
                command = 'clippy', -- 保存時に強力な診断ツールClippyを実行
              },
              completion = {
                callable = { snippets = 'fill_arguments' },
              },
            },
          },
        },
        -- ... etc. See `:help lspconfig-all` for a list of all the pre-configured LSPs
        --
        -- Some languages (like typescript) have entire language plugins that can be useful:
        --    https://github.com/pmizio/typescript-tools.nvim
        --
        -- But for many setups, the LSP (`ts_ls`) will work just fine
        -- ts_ls = {},
        --

        lua_ls = {
          -- cmd = { ... },
          -- filetypes = { ... },
          -- capabilities = {},
          settings = {
            Lua = {
              completion = {
                callSnippet = 'Replace',
              },
              -- You can toggle below to ignore Lua_LS's noisy `missing-fields` warnings
              -- diagnostics = { disable = { 'missing-fields' } },
            },
          },
        },
      }

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local ensure_installed = vim.tbl_keys(servers or {})

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      vim.list_extend(ensure_installed, {
        'stylua', -- Used to format Lua code
        'black',
        'goimports',
      })

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      require('mason-tool-installer').setup { ensure_installed = ensure_installed }
            require('mason-lspconfig').setup {
        ensure_installed = {}, -- explicitly set to an empty table (Kickstart populates installs via mason-tool-installer)
        automatic_installation = false,
        handlers = {
          function(server_name)
            local server = servers[server_name] or {}
            -- This handles overriding only values explicitly passed
            -- by the server configuration above. Useful when disabling
            -- certain features of an LSP (for example, turning off formatting for ts_ls)
            server.capabilities = vim.tbl_deep_extend('force', {}, capabilities, server.capabilities or {})
            require('lspconfig')[server_name].setup(server)
          end,
        },
      }
    end,
  },

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  { -- 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(bufnr)
        -- Disable "format_on_save lsp_fallback" for languages that don't
        -- have a well standardized coding style. You can add additional
        -- languages here or re-enable it for the disabled ones.
        local disable_filetypes = { c = true, cpp = true }
        if disable_filetypes[vim.bo[bufnr].filetype] then
          return nil
        else
          return {
            timeout_ms = 500,
            lsp_format = 'fallback',
          }
        end
      end,
      formatters_by_ft = {
        lua = { 'stylua' },
        -- Conform can also run multiple formatters sequentially
        python = { "isort", "black" },
        --
        -- You can use 'stop_after_first' to run the first available formatter from the list
        javascript = { "prettierd", "prettier", stop_after_first = true },
      },
    },
  },

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  { -- Autocompletion
    'saghen/blink.cmp',
    event = 'VimEnter',
    version = '1.*',
    dependencies = {
      -- Snippet Engine
      {
        'L3MON4D3/LuaSnip',
        version = '2.*',
        build = (function()
          -- Build Step is needed for regex support in snippets.
          -- This step is not supported in many windows environments.
          -- Remove the below condition to re-enable on windows.
          if vim.fn.has 'win32' == 1 or vim.fn.executable 'make' == 0 then
            return
          end
          return 'make install_jsregexp'
        end)(),
        dependencies = {
          -- `friendly-snippets` contains a variety of premade snippets.          --    See the README about individual language/framework/plugin snippets:https://github.com/rafamadriz/friendly-snippets
          {
            'rafamadriz/friendly-snippets',
            config = function()
              require('luasnip.loaders.from_vscode').lazy_load()
            end,
          },
        },
        opts = {},
      },
      'folke/lazydev.nvim',
    },
    --- @module 'blink.cmp'
    --- @type blink.cmp.Config
    opts = {
      keymap = {
        -- 'default' (recommended) for mappings similar to built-in completions
        --   <c-y> to accept ([y]es) the completion.
        --    This will auto-import if your LSP supports it.
        --    This will expand snippets if the LSP sent a snippet.
        -- 'super-tab' for tab to accept
        -- 'enter' for enter to accept
        -- 'none' for no mappings
        --
        -- For an understanding of why the 'default' preset is recommended,
        -- you will need to read `:help ins-completion`
        --
        -- No, but seriously. Please read `:help ins-completion`, it is really good!
        --
        -- All presets have the following mappings:
        -- <tab>/<s-tab>: move to right/left of your snippet expansion
        -- <c-space>: Open menu or open docs if already open
        -- <c-n>/<c-p> or <up>/<down>: Select next/previous item
        -- <c-e>: Hide menu
        -- <c-k>: Toggle signature help
        --
        -- See :h blink-cmp-config-keymap for defining your own keymap
        preset = 'default',

        -- For more advanced Luasnip keymaps (e.g. selecting choice nodes, expansion) see:
        --    https://github.com/L3MON4D3/LuaSnip?tab=readme-ov-file#keymaps
      },

      appearance = {
        -- 'mono' (default) for 'Nerd Font Mono' or 'normal' for 'Nerd Font'
        -- Adjusts spacing to ensure icons are aligned
        nerd_font_variant = 'mono',
      },

      completion = {
        -- By default, you may press `<c-space>` to show the documentation.
        -- Optionally, set `auto_show = true` to show the documentation after a delay.
        documentation = { auto_show = false, auto_show_delay_ms = 500 },
      },

      sources = {
        default = { 'lsp', 'path', 'snippets', 'lazydev' },
        providers = {
          lazydev = { module = 'lazydev.integrations.blink', score_offset = 100 },
        },
      },

      snippets = { preset = 'luasnip' },

      -- Blink.cmp includes an optional, recommended rust fuzzy matcher,
      -- which automatically downloads a prebuilt binary when enabled.
      --
      -- By default, we use the Lua implementation instead, but you may enable
      -- the rust implementation via `'prefer_rust_with_warning'`
      --
      -- See :h blink-cmp-config-fuzzy for more information
      fuzzy = { implementation = 'lua' },

      -- Shows a signature help window while you type arguments for a function
      signature = { enabled = true },
    },
  },

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  { -- You can easily change to a different colorscheme.
    -- Change the name of the colorscheme plugin below, and then
    -- change the command in the config to whatever the name of that colorscheme is.
    --
    -- If you want to see what colorschemes are already installed, you can use `:Telescope colorscheme`.
    'folke/tokyonight.nvim',
    priority = 1000, -- Make sure to load this before all the other start plugins.
    config = function()
      ---@diagnostic disable-next-line: missing-fields
      require('tokyonight').setup {
        transparent = true,
        styles = {
          comments = { italic = false }, -- Disable italics in comments
        },
      }

      -- Load the colorscheme here.
      -- Like many other themes, this one has different styles, and you could load
      -- any other, such as 'tokyonight-storm', 'tokyonight-moon', or 'tokyonight-day'.
      vim.cmd.colorscheme 'tokyonight-storm'
    end,
  },

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  -- Highlight todo, notes, etc in comments
  { 'folke/todo-comments.nvim', event = 'VimEnter', dependencies = { 'nvim-lua/plenary.nvim' }, opts = { signs = false } },

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return { -- Collection of various small independent plugins/modules
  'echasnovski/mini.nvim',
  version = false, -- 'false' (文字列) ではなく false (ブール値)
  config = function()
    -- MiniSessionsの設定
    local session = require 'mini.sessions'
    session.setup()

    local function is_blank(arg)
      return arg == nil or arg == ''
    end
    local function get_sessions(lead)
      local dir = session.config.dir
      if not dir then
        return {}
      end
      return vim
        .iter(vim.fs.dir(session.config.dir))
        :map(function(v)
          local name = vim.fs.basename(v)
          return vim.startswith(name, lead) and name or nil
        end)
        :totable()
    end
    vim.api.nvim_create_user_command('SessionWrite', function(arg)
      local session_name = is_blank(arg.args) and vim.v.this_session or arg.args
      if is_blank(session_name) then
        vim.notify('Session name is required', vim.log.levels.WARN)
        return
      end
      vim.cmd '%argdelete'
      session.write(session_name)
    end, { desc = 'Write session', nargs = '?', complete = get_sessions })

    vim.api.nvim_create_user_command('SessionRead', function()
      session.select('read', { verbose = true })
    end, { desc = 'Load session' })

    vim.api.nvim_create_user_command('SessionEscape', function()
      vim.v.this_session = ''
    end, { desc = 'Escape session' })
    vim.api.nvim_create_user_command('SessionReveal', function()
      if is_blank(vim.v.this_session) then
        vim.print 'No session'
        return
      end
      vim.print(vim.fs.basename(vim.v.this_session))
    end, { desc = 'Reveal current session' })
    -- 1. mini.starter の設定
    local starter = require 'mini.starter'
    starter.setup {
      header = [[
      ███╗   ██╗██╗   ██╗███████╗██╗██████╗ ███████╗
      ████╗  ██║██║   ██║██╔════╝██║██╔══██╗██╔════╝
      ██╔██╗ ██║██║   ██║█████╗  ██║██████╔╝█████╗  
      ██║╚██╗██║╚██╗ ██╔╝██╔══╝  ██║██╔══██╗██╔══╝  
      ██║ ╚████║ ╚████╔╝ ██║     ██║██║  ██║███████╗
      ╚═╝  ╚═══╝  ╚═══╝  ╚═╝     ╚═╝╚═╝  ╚═╝╚══════╝
        ]],
      items = {
        starter.sections.recent_files(5, false),
        starter.sections.sessions(5, true),
        starter.sections.builtin_actions(),
      },
      content_hooks = {
        function(content)
          for _, unit in ipairs(content) do
            if unit.section == 'header' then
              unit.hl = 'Title'
            end
          end
          return content
        end,
        starter.gen_hook.adding_bullet(),
        starter.gen_hook.aligning('center', 'center'),
      },
    }
    local misc = require 'mini.misc'
    misc.setup()

    misc.setup_restore_cursor()
    vim.api.nvim_create_user_command('Zoom', function()
      misc.zoom(0, {})
    end, { desc = 'Zoom current buffer' })
    vim.keymap.set('n', 'mz', '<cmd>Zoom<cr>', { desc = '[Z]oom current buffer' })

    -- 2. その他の mini モジュールの設定
    require('mini.ai').setup { n_lines = 500 }
    require('mini.surround').setup()
    require('mini.pairs').setup()
    require('mini.indentscope').setup()

    local statusline = require 'mini.statusline'
    statusline.setup { use_icons = vim.g.have_nerd_font }
    ---@diagnostic disable-next-line: duplicate-set-field
    statusline.section_location = function()
      return '%2l:%-2v'
    end
  end, -- ここで config 関数を閉じる
}

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  { -- Highlight, edit, and navigate code
    'nvim-treesitter/nvim-treesitter',
    build = ':TSUpdate',
    -- main = 'nvim-treesitter.configs', -- Sets main module to use for opts
    -- [[ Configure Treesitter ]] See `:help nvim-treesitter`
    opts = {
      ensure_installed = { 'bash', 'c', 'diff', 'html', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' },
      -- Autoinstall languages that are not installed
      auto_install = true,
      highlight = {
        enable = true,
        -- Some languages depend on vim's regex highlighting system (such as Ruby) for indent rules.
        --  If you are experiencing weird indenting issues, add the language to
        --  the list of additional_vim_regex_highlighting and disabled languages for indent.
        additional_vim_regex_highlighting = { 'ruby' },
      },
      indent = { enable = true, disable = { 'ruby' } },
    },
    -- There are additional nvim-treesitter modules that you can use to interact
    -- with nvim-treesitter. You should go explore a few and see what interests you:
    --
    --    - Incremental selection: Included, see `:help nvim-treesitter-incremental-selection-mod`
    --    - Show your current context: https://github.com/nvim-treesitter/nvim-treesitter-context
    --    - Treesitter + textobjects: https://github.com/nvim-treesitter/nvim-treesitter-textobjects
  },

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  {
    -- add denops

    'vim-denops/denops.vim',
    lazy = false,
    priority = 1000,
  },

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return {
  -- 参考 https://zenn.dev/kkc/articles/tk-nvim-skkeleton-setting2
  { 'vim-denops/denops.vim', lazy = false },
  { 'Shougo/ddc.vim' },
  { 'Shougo/pum.vim' },
  { 'Shougo/ddc-ui-pum' },

  {
    'delphinus/skkeleton_indicator.nvim',
    config = function()
      require('skkeleton_indicator').setup {}
    end,
  },

  {
    'vim-skk/skkeleton',
    dependencies = {
      'vim-denops/denops.vim',
      'Shougo/ddc.vim',
      't4k44/skkeleton-azik-kanatable', -- 個人設定分をk16em氏のkanatableからfork
    },
    config = function()
      vim.fn['skkeleton#azik#add_table'] 'us'
      vim.fn['skkeleton#register_kanatable']('azik', {
        q = 'katakana',
      })

      vim.fn['skkeleton#config'] {
        kanaTable = 'azik',
        globalDictionaries = {
          '~/.skk/SKK-JISYO.L',
        },
        userDictionary = '~/.skk/skk-user.dict',
        completionRankFile = '~/.skk/rank.json',
        eggLikeNewline = true,
        keepState = true,
        showCandidatesCount = 2,
        registerConvertResult = true,
      }

      vim.cmd [[ call ddc#custom#patch_global('sources', ['skkeleton']) ]]
      vim.cmd [[ call ddc#custom#patch_global('sourceOptions', {
        \ '_': {
        \   'matchers': ['matcher_head'],
        \   'sorters': ['sorter_rank'],
        \ },
        \ 'skkeleton': {
        \   'mark': 'skkeleton',
        \   'matchers': [],
        \   'sorters': [],
        \   'converters': [],
        \   'isVolatile': v:true,
        \   'minAutoCompleteLength': 1,
        \ }
        \})
      ]]
      vim.cmd [[ call ddc#enable() ]]
      vim.cmd [[ call ddc#custom#patch_global('ui', 'pum') ]]

      vim.keymap.set({ 'i', 'c', 't' }, '<C-j>', '<Plug>(skkeleton-toggle)', { noremap = false })
      vim.keymap.set({ 'i', 'c' }, '<C-n>', '<cmd>call pum#map#insert_relative(+1)<CR>')
      vim.keymap.set({ 'i', 'c' }, '<C-p>', '<cmd>call pum#map#insert_relative(-1)<CR>')
      vim.keymap.set({ 'i', 'c' }, '<C-y>', '<cmd>call pum#map#confirm()<CR>')
      vim.keymap.set({ 'i', 'c' }, '<C-e>', '<cmd>call pum#map#cancel()<CR>')
      vim.keymap.set({ 'i', 'c' }, '<PageDown>', '<cmd>call pum#map#insert_relative_page(+1)<CR>')
      vim.keymap.set({ 'i', 'c' }, '<PageUp>', '<cmd>call pum#map#insert_relative_page(-1)<CR>')
    end,
  },
}

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return {
  -- 1. Copilot 本体の設定
  {
    'zbirenbaum/copilot.lua',
    cmd = 'Copilot',
    event = 'InsertEnter',
    opts = {
      -- blink.cmp で表示するため、本体の UI 類は無効化する
      suggestion = { enabled = false },
      panel = { enabled = false },
    },
  },

  -- 2. Blink と Copilot を繋ぐソース
  {
    'saghen/blink.cmp',
    dependencies = {
      'giuxtaposition/blink-cmp-copilot',
    },
    opts = {
      sources = {
        -- 'copilot' をソースリストに追加
        default = { 'lsp', 'path', 'snippets', 'buffer', 'copilot' },
        providers = {
          copilot = {
            name = 'copilot',
            module = 'blink-cmp-copilot',
            score_offset = 100, -- 補完順位を上げたい場合は調整
            async = true,
          },
        },
      },
      -- アイコン表示を綺麗にしたい場合（任意）
      appearance = {
        kind_icons = {
          Copilot = '',
        },
      },
    },
  },
}

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return {
  'OXY2DEV/markview.nvim',
  lazy = false,

  -- Completion for `blink.cmp`
  dependencies = { 'saghen/blink.cmp' },
}

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return {
  'OXY2DEV/markview.nvim',
  lazy = false,

  -- Completion for `blink.cmp`
  dependencies = { 'saghen/blink.cmp' },
}

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return {
  {
    'vim-jp/vimdoc-ja',

    lazy = true,
    event = 'VeryLazy',
    config = function()
      vim.opt.helplang:prepend 'ja'
    end,
  },
}

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-- nvim v0.8.0
return {
  'kdheepak/lazygit.nvim',
  lazy = true,
  cmd = {
    'LazyGit',
    'LazyGitConfig',
    'LazyGitCurrentFile',
    'LazyGitFilter',
    'LazyGitFilterCurrentFile',
  },
  -- optional for floating window border decoration
  dependencies = {
    'nvim-lua/plenary.nvim',
  },
  -- setting the keybinding for LazyGit with 'keys' is recommended in
  -- order to load the plugin when the command is run for the first time
  keys = {
    { '<leader>lg', '<cmd>LazyGit<cr>', desc = 'LazyGit' },
  },
}

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return {
  'monaqa/dial.nvim',
  keys = {
    {
      '<C-a>',
      function()
        return require('dial.map').inc_normal()
      end,
      expr = true,
      desc = 'Increment',
    },
    {
      '<C-x>',
      function()
        return require('dial.map').dec_normal()
      end,
      expr = true,
      desc = 'Decrement',
    },
  },
  config = function()
    local augend = require 'dial.augend'
    require('dial.config').augends:setup {
      default = {
        augend.integer.alias.decimal, -- 普通の整数
        augend.integer.alias.hex, -- 16進数
        augend.date.alias['%Y/%m/%d'], -- 日付
        augend.constant.alias.bool, -- true/false
        augend.constant.new {
          elements = { 'and', 'or' },
          word = true,
          cyclic = true,
        },
      },
    }
  end,
}