nvim-nix/nvim/lua/plugins/dashboard.lua

local M = {
  neofetch = "",
  version = "",
  plugins = "",
}

local function draw_footer(dashboard)
  local footer = {
    M.version,
    M.plugins,
  }
  if type(M.neofetch) ~= "string" then
    table.insert(
      footer,
      string.format("%s\t%s", M.neofetch[1]["result"]["prettyName"], M.neofetch[2]["result"]["release"])
    )
    local uptime = M.neofetch[3]["result"]["uptime"] / 1000
    local h = uptime / 3600
    local m = 60 - (math.ceil(h) - h) * 60
    local s = 60 - math.floor((math.ceil(m) - m) * 60)
    m = math.floor(m)
    h = math.floor(h)
    table.insert(footer, string.format("uptime: %sh %sm %ss", h, m, s))
  end
  dashboard.section.footer.val = footer
  vim.cmd.AlphaRedraw()
end

local function fetch(dashboard)
  local neofetch = vim.fn.executable("fastfetch")
  if neofetch == 0 then
    return
  end
  local cmd = "fastfetch"
  local args = { "--structure", "OS:Kernel:Uptime", "--format", "json" }

  local t = ""
  local stdout = function(error, data)
    if data then
      t = t .. data
    end
  end
  local on_exit = function(...)
    if #t > 0 then
      M.neofetch = vim.json.decode(t)
    end
    local timer = vim.uv.new_timer()

    timer:start(
      20,
      0,
      vim.schedule_wrap(function()
        draw_footer(dashboard)
      end)
    )
  end
  vim.system({ cmd, table.unpack(args) }, {
    text = true,
    stdout = stdout,
  }, on_exit)
end

return {
  "goolord/alpha-nvim",
  cond = function()
    -- nix 8..
    if #vim.v.argv > 8 then
      return false
    end
    return not vim.env.YAZI_ID
  end,
  config = function()
    local height = tonumber(vim.api.nvim_command_output("echo &lines")) or 0

    local dashboard = require("alpha.themes.dashboard")

    dashboard.autostart = true
    dashboard.config.layout[1].val = 1

    dashboard.section.buttons.val = {
      dashboard.button("n", " " .. " New file", ":ene <BAR> startinsert <CR>"),
      dashboard.button("f", " " .. " Find file", ":FzfLua files<cr>"),
      dashboard.button("a", "󰊳 " .. " AI", function()
        local buf = vim.api.nvim_get_current_buf()
        vim.cmd([[:CodeCompanionChat]])
        vim.cmd("bd " .. tostring(buf))
      end),
      dashboard.button("s", " " .. " Search", ":FzfLua grep_project<cr>"),
      dashboard.button(
        "r",
        "󰄉 " .. " Recent files",
        ":lua require('fzf-lua').oldfiles({ multiprocess = true, cwd_only=true })<cr>"
      ),
      dashboard.button("g", "󰄉 " .. " Diff", ":DiffviewOpen <cr>"),
      dashboard.button("c", " " .. " Config", ":e .nvim.lua <CR>"),
      dashboard.button("u", "󰊳 " .. " Update Plugins", ":Lazy update<CR>"),
      dashboard.button("q", " " .. " Quit", ":qa<CR>"),
    }

    -- set highlight
    for _, button in ipairs(dashboard.section.buttons.val) do
      button.opts.hl = "AlphaButtons"
      button.opts.hl_shortcut = "AlphaShortcut"
    end
    dashboard.section.header.opts.hl = "AlphaHeader"
    dashboard.section.buttons.opts.hl = "AlphaButtons"
    dashboard.section.footer.opts.hl = "AlphaFooter"

    if height > 40 then
      local header = require("banner").get_by_day()
      dashboard.section.header.val = header
      fetch(dashboard)
    else
      dashboard.section.header.val = ""
    end

    -- close Lazy and re-open when the dashboard is ready
    local ft = vim.filetype.match({ buf = 0 })
    if ft == "lazy" then
      vim.cmd.close()
      vim.api.nvim_create_autocmd("User", {
        pattern = "AlphaReady",
        callback = function()
          require("lazy").show()
        end,
      })
    end

    require("alpha").setup(dashboard.opts)
    vim.api.nvim_create_autocmd("User", {
      pattern = "LazyVimStarted",
      callback = function()
        local stats = require("lazy").stats()
        local ms = (math.floor(stats.startuptime * 100 + 0.5) / 100)
        M.version = string.format("󰥱 v%s", vim.version())
        M.plugins = "⚡Neovim loaded " .. stats.loaded .. "/" .. stats.count .. " plugins in " .. ms .. "ms"

        if height > 60 then
          draw_footer(dashboard)
        end
      end,
    })
  end,
  dependencies = {
    -- { "JMarkin/ascii.nvim", lazy = true },
  },
}