How to configure plugin one area, but lazy load when used as dependency?

[9mm]

I have nvim-dap thats currently only being used by go.nvim

So, its listed as a dependency there

but what i would really like to do is make a dap.lua in my plugins folder, set the event or cmd to somehow NOT load it unless its explicitly called as a dependency from some other plugin

Now, because go.nvim only loads for *.go files, then my nvim-dap would be lazy loaded by default

return {
  "ray-x/go.nvim",
  dependencies = {
    "nvim-lspconfig",
    "nvim-treesitter",
    "mfussenegger/nvim-dap",
    "ray-x/guihua.lua",
    "rcarriga/nvim-dap-ui",
  },
  config = function()
    local capabilities = vim.lsp.protocol.make_client_capabilities()
    capabilities = require("cmp_nvim_lsp").default_capabilities(capabilities)

    require("go").setup({
      lsp_cfg = {
        capabilities = capabilities,
      },
    })

    -- gofmt + goimport on save
    local format_sync_grp = vim.api.nvim_create_augroup("GoImport", {})
    vim.api.nvim_create_autocmd("BufWritePre", {
      pattern = "*.go",
      callback = function()
        require("go.format").goimport()
      end,
      group = format_sync_grp,
    })
  end,
  event = { "CmdlineEnter" },
  ft = { "go", "gomod" },
  build = ':lua require("go.install").update_all_sync()'
}

[dhleong]

I believe having a separate top level spec for dap with optional = true is exactly what you're looking for.

[folke]

You dont even need optional=true, but do add lazy=true