[add] git helper to open all changed git files at once

lua/config/keymaps.lua

@@ -1,3 +1,38 @@
 -- Keymaps are automatically loaded on the VeryLazy event
 -- Default keymaps that are always set: https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/config/keymaps.lua
 -- Add any additional keymaps here
+
+vim.keymap.set("n", "<leader>gO", function()
+  local git_root = vim.fn.systemlist("git rev-parse --show-toplevel")[1]
+  if vim.v.shell_error ~= 0 or not git_root then
+    vim.notify("Not in a git repository", vim.log.levels.WARN)
+    return
+  end
+  local output = vim.fn.systemlist("git status --porcelain")
+  local files = {}
+  for _, line in ipairs(output) do
+    if line ~= "" then
+      local status = line:sub(1, 2)
+      -- skip deleted files
+      if not status:match("D") then
+        local filepath = line:sub(4)
+        -- handle renames: "old -> new"
+        local arrow_pos = filepath:find(" -> ")
+        if arrow_pos then
+          filepath = filepath:sub(arrow_pos + 4)
+        end
+        if filepath ~= "" then
+          table.insert(files, git_root .. "/" .. filepath)
+        end
+      end
+    end
+  end
+  if #files == 0 then
+    vim.notify("No modified files found", vim.log.levels.INFO)
+    return
+  end
+  for _, file in ipairs(files) do
+    vim.cmd.edit(vim.fn.fnameescape(file))
+  end
+  vim.notify("Opened " .. #files .. " modified file(s)", vim.log.levels.INFO)
+end, { desc = "Open all git modified files" })