feat: bufdelete

lua/snacks/bufdelete.lua

@@ -0,0 +1,52 @@
+---@class snacks.bufdelete
+---@overload fun(buf?: number)
+local M = setmetatable({}, {
+  __call = function(t, ...)
+    return t.delete(...)
+  end,
+})
+
+---@param buf number?
+function M.delete(buf)
+  buf = buf or 0
+  buf = buf == 0 and vim.api.nvim_get_current_buf() or buf
+
+  if vim.bo.modified then
+    local choice = vim.fn.confirm(("Save changes to %q?"):format(vim.fn.bufname()), "&Yes\n&No\n&Cancel")
+    if choice == 0 or choice == 3 then -- 0 for <Esc>/<C-c> and 3 for Cancel
+      return
+    end
+    if choice == 1 then -- Yes
+      vim.cmd.write()
+    end
+  end
+
+  for _, win in ipairs(vim.fn.win_findbuf(buf)) do
+    vim.api.nvim_win_call(win, function()
+      if not vim.api.nvim_win_is_valid(win) or vim.api.nvim_win_get_buf(win) ~= buf then
+        return
+      end
+      -- Try using alternate buffer
+      local alt = vim.fn.bufnr("#")
+      if alt ~= buf and vim.fn.buflisted(alt) == 1 then
+        vim.api.nvim_win_set_buf(win, alt)
+        return
+      end
+
+      -- Try using previous buffer
+      local has_previous = pcall(vim.cmd, "bprevious")
+      if has_previous and buf ~= vim.api.nvim_win_get_buf(win) then
+        return
+      end
+
+      -- Create new listed buffer
+      local new_buf = vim.api.nvim_create_buf(true, false)
+      vim.api.nvim_win_set_buf(win, new_buf)
+    end)
+  end
+  if vim.api.nvim_buf_is_valid(buf) then
+    pcall(vim.cmd, "bdelete! " .. buf)
+  end
+end
+
+return M