how to save mason packages in neovim configuration

[olduh29]

Hello, I'm new to mason (even to neovim in fact). I've configured my windows neovim with lazyvim and install some C# related packages through mason manually.
Now I want to reuse my neovim setting on a linux box. But I will need to go through the mason manual install for C# packages. is there any way to tell mason to install packages in the neovim configuration (like in init.lua for example) ? I did not find any clue about this

thanks for your answer

[larsks]

According to this answer, it looks like you could do something like this for lsp plugins:

require("mason-lspconfig").setup {
  ensure_installed = { "package" }
}

Or more generically (this will work with non-lsp plugins):

local mason_registry = require 'mason-registry'
local package = mason_registry.get_package 'lua-language-server'
if not package:is_installed() then
  package:install()
end

[latexalpha]

You can specify different installations for Windows and Linux like this:

{
	"mason-org/mason-lspconfig.nvim", -- Bridge between Mason and nvim-lspconfig
	config = function()
		local mason_lspconfig = require("mason-lspconfig")

		-- Detect OS for platform-specific installations
		local binaryformat = package.cpath:match("%p[\\|/]?%p(%a+)")
		local Ensure_installed = {} -- Table to hold the list of servers to install
		if binaryformat == "dll" then
			-- Windows-specific packages to install
			Ensure_installed = {
				-- Language Servers
				"lua_ls", -- Lua language server
				"texlab", -- LaTeX language server
				"pyright", -- Python language server (commented out)
				-- Formatters
				"ltex", -- LanguageTool for grammar checking
			}
		else
			-- Unix-like systems (Linux/macOS)
			Ensure_installed = {
				"lua_ls", -- Lua language server
				"pyright", -- Python language server (commented out)
			}
		end
		binaryformat = nil -- Clean up variable after use

		-- Configure which servers Mason should automatically install
		mason_lspconfig.setup({
			ensure_installed = Ensure_installed,
			automatic_enable = false,
			-- automatic_enable = {
			-- "lua_ls",
			-- },
		})
	end,
},

[larsks]

This is what I ended up doing...in lua/config/mason.lua, I have:

local mason_plugins = {
  "ansible-language-server",
  "ansible-lint",
  "basedpyright",
  "bash-language-server",
  "lua-language-server",
  "ruff",
  "shellcheck",
  "vale-ls",
  "stylua",
  "shfmt",
  "gopls",
  "terraform-ls",
}

local mason_registry = require("mason-registry")

local function install_mason_package(name)
  local package = mason_registry.get_package(name)
  if not package:is_installed() then
    package:install()
  end
end

for _, name in ipairs(mason_plugins) do
  install_mason_package(name)
end

And then in init.lua:

require("config.mason")