コードリーディングツールとしてNeovimを使い始めた

vim.g.mapleader = " "
vim.g.maplocalleader = "\\"

require("lazy").setup({
  {
    "nvim-telescope/telescope.nvim",
    dependencies = { "nvim-lua/plenary.nvim" },
    config = function()
      require("telescope").setup({
        defaults = {
          file_ignore_patterns = {"%.git/", "node_modules/", "%.DS_Store"},
        },
        pickers = {
          find_files = { hidden = true },
        },
      })
 
      local builtin = require("telescope.builtin")
      vim.keymap.set("n", "<leader>ff", builtin.find_files, { desc = "Find files" })
      vim.keymap.set("n", "<leader>fg", builtin.live_grep, { desc = "Live grep" })
      vim.keymap.set("n", "<leader>fb", builtin.buffers, { desc = "Find buffers" })
    end,
  },
})

$ nf    # nvim + Telescope find_files で起動
$ ng    # nvim + Telescope live_grep で起動

local function extract_real_path(path)
  -- fugitiveのパスから実際のファイルパスを抽出
  if path:match("^fugitive://") then
    local real_path = vim.fn.FugitiveReal(path)
    if real_path:match("^fugitive://") then
      real_path = real_path:match("/%.git/.-//%d+/(.*)$") or real_path
    end
    return real_path
  end
  return path
end
 
local function get_relative_path(path)
  -- 絶対パスの場合は相対パスに変換
  if path:match("^/") then
    return vim.fn.fnamemodify(path, ":.")
  end
  return path
end
 
local function get_current_file_path()
  local path = vim.fn.expand("%")
  path = extract_real_path(path)
  return get_relative_path(path)
end
 
-- ファイル相対パスをコピー
vim.keymap.set("n", "<leader>cp", function()
  local path = get_current_file_path()
  vim.fn.setreg("+", path)
  print("Copied: " .. path)
end, { desc = "Copy relative file path" })
 
-- ファイル相対パスとコード選択範囲をコピー
vim.keymap.set("v", "<leader>cc", function()
  local path = get_current_file_path()
  
  -- 選択範囲のテキストを取得
  vim.cmd('normal! "vy')
  local selected_text = vim.fn.getreg("v")
  
  -- フォーマットを作成
  local formatted = "@" .. path .. "\n\n```\n" .. selected_text .. "\n```"
  
  vim.fn.setreg("+", formatted)
  print("Copied: @" .. path .. " with selected text")
end, { desc = "Copy file path with selected code" })

-- GitHub でファイルを開く
vim.keymap.set("n", "<leader>gh", function()
  local path = get_current_file_path()
  vim.cmd("!gh browse " .. path .. " --commit")
  print("Opening: " .. path .. " in GitHub at current commit")
end, { desc = "Open file in GitHub at current commit" })
 
-- GitHub でファイルを行番号付きで開く（ビジュアルモード）
vim.keymap.set("v", "<leader>gh", function()
  local path = get_current_file_path()
  
  -- 選択範囲を取得（ビジュアルモード中に取得）
  local start_line = vim.fn.line("v")
  local end_line = vim.fn.line(".")
  
  -- 開始行と終了行を正しい順序にする
  if start_line > end_line then
    start_line, end_line = end_line, start_line
  end
  
  -- 行番号が0の場合は現在行を使用
  if start_line == 0 then
    start_line = vim.fn.line(".")
  end
  
  local line_part
  if start_line == end_line then
    line_part = ":" .. start_line
  else
    line_part = ":" .. start_line .. "-" .. end_line
  end
  
  vim.cmd("!gh browse " .. path .. line_part .. " --commit")
  if start_line == end_line then
    print("Opening: " .. path .. " line " .. start_line .. " in GitHub at current commit")
  else
    print("Opening: " .. path .. " lines " .. start_line .. "-" .. end_line .. " in GitHub at current commit")
  end
end, { desc = "Open file in GitHub with selected lines at current commit" })

require("lazy").setup({
  {
    "tpope/vim-fugitive",
    config = function()
      vim.keymap.set("n", "<leader>gs", ":Git<CR>", { desc = "Git status" })
      vim.keymap.set("n", "<leader>gd", ":Git diff --staged<CR>", { desc = "Git diff staged" })
    end,
  },
})

$ nvg    # nvim + Git で起動

# 基本的な使い方
git ls-files | peco
 
# 選択したファイルをbatで表示
git ls-files | peco | xargs bat
 
# 選択したファイルをエディタで開く
git ls-files | peco | xargs $EDITOR
 
# エイリアス設定
alias fp='git ls-files | peco | xargs bat'
alias fpe='git ls-files | peco | xargs $EDITOR'

# rgの結果をpecoで選択
rg --line-number --no-heading "search_term" | peco
 
# より実用的なfunction
rgp() {
  local selected
  selected=$(rg --line-number --no-heading --color=never "$1" | peco)
  if [ -n "$selected" ]; then
    local file=$(echo "$selected" | cut -d: -f1)
    local line=$(echo "$selected" | cut -d: -f2)
    bat --highlight-line "$line" "$file"
  fi
}
 
# 行番号指定でファイルを開く版
rgpe() {
  local selected
  selected=$(rg --line-number --no-heading --color=never "$1" | peco)
  if [ -n "$selected" ]; then
    local file=$(echo "$selected" | cut -d: -f1)
    local line=$(echo "$selected" | cut -d: -f2)
    $EDITOR "+$line" "$file"  # vim/nvimの場合
  fi
}