lualine info if mason packages updates are available

[kekscode]

I use lualine and the lazy package manager. This combination has this little thingie:

which signals that new updates for lazy plugins are available.

I would like to have that for Mason. I know from the docs that mason has:

local registry = require("mason-registry")

registry.refresh(function ()
    local packages = registry.get_all_packages()
    -- print(vim.inspect(packages))
end)

And i feel that this could be used for the same purpose. Did anybody do the same thing or even got a working example?

[williamboman]

You probably want something like this

local registry = require("mason-registry")

local function update_lualine()
    local installed_packages = registry.get_installed_package_names()
    local count = #installed_packages
   -- do something with count
end

registry.refresh(update_lualine)

registry:on("package:install:success", update_lualine)
registry:on("package:uninstall:success", update_lualine)

[kekscode]

ok, i think i have it working now:

7 updates detected. If i click on it, it does :Mason.

The check function is:

-- check for mason package upgrades
local function lualine_mason_updates()
  local registry = require("mason-registry")
  local installed_packages = registry.get_installed_package_names()
  local upgrades_available = false
  local packages_outdated = 0
  function myCallback(success, result_or_err)
    if success then
      upgrades_available = true
      packages_outdated = packages_outdated + 1
    end
  end

  for _, pkg in pairs(installed_packages) do
    local p = registry.get_package(pkg)
    if p then
      p:check_new_version(myCallback)
    end
  end

  if upgrades_available then
    return packages_outdated
  else
    return ""
  end
end

And this is how i embed it in my lualine:

-- [...]
            {
              lualine_mason_updates,
              icon     = "🧱",
              on_click = function()
                vim.cmd("Mason")
              end,
            },
-- [...]

[Blackjacx]

WOW, cool I searched soooo long for a solution to this 🤩 Thank you so much! As you seem to know what you're doing here, can you also tell maybe why there is a Mason extension for Lualine and how it is supposed to work?

[kekscode]

Thanks @Blackjacx for the heads up, happy that the snippet is useful for you. As for the mason plugin for lualine, it is apparently ~10mo old, so i wasn’t aware of it’s existence back then. I‘ll have a look at it.

[kekscode]

@Blackjacx i had a look at the plugin. It triggers when :Mason is opened (recognized the filetype https://github.com/nvim-lualine/lualine.nvim/blob/master/lua/lualine/extensions/mason.lua#L27) and then shows you how many packages are installed by modifying the lualine accordingly:

[Blackjacx]

Ahh cool 👍 Thx for checking that out 🙏