feat(extras): big rework of default extras

lua/lazyvim/config/init.lua

@@ -144,8 +144,10 @@ M.json = {
     extras = {}, ---@type string[]
   },
 }
+M.json_loaded = false
 
 function M.json.load()
+  M.json_loaded = true
   local f = io.open(M.json.path, "r")
   if f then
     local data = f:read("*a")
@@ -322,6 +324,62 @@ function M.init()
   M.json.load()
 end
 
+---@alias LazyVimDefault {name: string, extra: string, enabled?: boolean, origin?: "global" | "default" | "extra" }
+
+local default_extras ---@type table<string, LazyVimDefault>
+function M.get_defaults()
+  if default_extras then
+    return default_extras
+  end
+  ---@type table<string, LazyVimDefault[]>
+  local checks = {
+    picker = {
+      { name = "fzf", extra = "editor.fzf" },
+      { name = "snacks", extra = "editor.snacks_picker" },
+      { name = "telescope", extra = "editor.telescope" },
+    },
+    cmp = {
+      { name = "blink.cmp", extra = "coding.blink", enabled = vim.fn.has("nvim-0.10") == 1 },
+      { name = "nvim-cmp", extra = "coding.nvim-cmp" },
+    },
+    explorer = {
+      { name = "neo-tree", extra = "editor.neo-tree" },
+      { name = "snacks", extra = "editor.snacks_explorer" },
+    },
+  }
+  default_extras = {}
+  for name, check in pairs(checks) do
+    local valid = {} ---@type string[]
+    for _, extra in ipairs(check) do
+      if extra.enabled ~= false then
+        valid[#valid + 1] = extra.name
+      end
+    end
+    local origin = "default"
+    local use = vim.g["lazyvim_" .. name]
+    use = vim.tbl_contains(valid, use or "auto") and use or nil
+    origin = use and "global" or origin
+    for _, extra in ipairs(use and {} or check) do
+      if extra.enabled ~= false and LazyVim.has_extra(extra.extra) then
+        use = extra.name
+        break
+      end
+    end
+    origin = use and "extra" or origin
+    use = use or valid[1]
+    for _, extra in ipairs(check) do
+      local import = "lazyvim.plugins.extras." .. extra.extra
+      extra = vim.deepcopy(extra)
+      extra.enabled = extra.name == use
+      if extra.enabled then
+        extra.origin = origin
+      end
+      default_extras[import] = extra
+    end
+  end
+  return default_extras
+end
+
 setmetatable(M, {
   __index = function(_, key)
     if options == nil then