Revert changes to bootstrapping, make checkhealth produce more meaningful message.

README.md

@@ -39,11 +39,14 @@ You can add the following Lua code to your `init.lua` to bootstrap **lazy.nvim**
 ```lua
 local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
 if not vim.loop.fs_stat(lazypath) then
-  vim.fn.system({ "git", "clone",
-    "--filter=blob:none", "--depth=1",
+  vim.fn.system({
+    "git",
+    "clone",
+    "--filter=blob:none",
     "https://github.com/folke/lazy.nvim.git",
-    lazypath })
-  vim.fn.system({ "git", "-C", lazypath, "checkout", "tags/stable" }) -- last stable release
+    "--branch=stable", -- latest stable release
+    lazypath,
+  })
 end
 vim.opt.rtp:prepend(lazypath)
 ```

lua/lazy/health.lua

@@ -54,7 +54,7 @@ function M.check()
 
   local spec = Config.spec
   if spec == nil then
-    ok("no packages setup for installation so far.")
+    error("No plugins loaded. Did you forget to run `require(\"lazy\").setup()`?")
   else
     for _, plugin in pairs(spec.plugins) do
       M.check_valid(plugin)

lua/lazy/init.lua

@@ -96,11 +96,14 @@ end
 function M.bootstrap()
   local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
   if not vim.loop.fs_stat(lazypath) then
-    vim.fn.system({ "git", "clone",
-      "--filter=blob:none", "--depth=1",
+    vim.fn.system({
+      "git",
+      "clone",
+      "--filter=blob:none",
       "https://github.com/folke/lazy.nvim.git",
-      lazypath })
-    vim.fn.system({ "git", "-C", lazypath, "checkout", "tags/stable" }) -- last stable release
+      "--branch=stable", -- latest stable release
+      lazypath,
+    })
   end
   vim.opt.rtp:prepend(lazypath)
 end