fix(cache): check that modpaths still exist when finding mod root

lua/lazy/core/cache.lua

@@ -262,7 +262,7 @@ function M.find_root(modname)
   if M.cache[modname] then
     -- check if modname is in cache
     local modpath = M.cache[modname].modpath
-    if M.check_path(modname, modpath) then
+    if M.check_path(modname, modpath) and vim.loop.fs_stat(modpath) then
       local root = modpath:gsub("/init%.lua$", ""):gsub("%.lua$", "")
       return root
     end
@@ -271,7 +271,7 @@ function M.find_root(modname)
     -- check for any children in the cache
     for child, entry in pairs(M.cache) do
       if child:find(modname, 1, true) == 1 then
-        if M.check_path(child, entry.modpath) then
+        if M.check_path(child, entry.modpath) and vim.loop.fs_stat(entry.modpath) then
           local basename = modname:gsub("%.", "/")
           local childbase = child:gsub("%.", "/")
           local ret = entry.modpath:gsub("/init%.lua$", ""):gsub("%.lua$", "")

tests/core/util_spec.lua

@@ -3,11 +3,19 @@ local Cache = require("lazy.core.cache")
 local Helpers = require("tests.helpers")
 
 describe("util", function()
+  local rtp = vim.opt.rtp:get()
   before_each(function()
+    vim.opt.rtp = rtp
+    for k, v in pairs(package.loaded) do
+      if k:find("^foobar") then
+        package.loaded[k] = nil
+      end
+    end
     Helpers.fs_rm("")
   end)
 
   it("lsmod lists all mods in dir", function()
+    vim.opt.rtp:append(Helpers.path(""))
     local tests = {
       {
         root = "lua/foo",
@@ -35,7 +43,6 @@ describe("util", function()
       },
     }
 
-    vim.opt.rtp:append(Helpers.path(""))
     for t, test in ipairs(tests) do
       local expected = vim.deepcopy(test.mods)
       table.sort(expected)
@@ -74,4 +81,54 @@ describe("util", function()
       assert.same(expected, mods)
     end
   end)
+
+  it("find the correct root with dels", function()
+    Cache.cache = {}
+    Cache.indexed = {}
+    Cache.indexed_rtp = false
+    vim.opt.rtp:append(Helpers.path("old"))
+    Helpers.fs_create({ "old/lua/foobar/init.lua" })
+    require("foobar")
+    local root = Cache.find_root("foobar")
+    assert(root, "foobar root not found")
+    assert.same(Helpers.path("old/lua/foobar"), root)
+
+    Helpers.fs_rm("old/")
+
+    -- vim.opt.rtp = rtp
+    Cache.indexed = {}
+    Cache.indexed_rtp = false
+    vim.opt.rtp:append(Helpers.path("new"))
+    Helpers.fs_create({ "new/lua/foobar/init.lua" })
+    root = Cache.find_root("foobar")
+    assert(root, "foobar root not found")
+    assert.same(Helpers.path("new/lua/foobar"), root)
+  end)
+
+  it("find the correct root with mod dels", function()
+    Cache.cache = {}
+    Cache.indexed = {}
+    Cache.indexed_rtp = false
+    Cache.topmods = {}
+    Cache.enabled = true
+    vim.opt.rtp:append(Helpers.path("old"))
+    Helpers.fs_create({ "old/lua/foobar/test.lua" })
+    Cache.cache["foobar.test"] = { modpath = Helpers.path("old/lua/foobar/test.lua") }
+    local root = Cache.find_root("foobar")
+    assert(root, "foobar root not found")
+    assert.same(Helpers.path("old/lua/foobar"), root)
+    assert(not Cache.cache["foobar"], "foobar should not be in cache")
+    assert(Cache.cache["foobar.test"], "foobar.test not found in cache")
+
+    Helpers.fs_rm("old/")
+
+    -- vim.opt.rtp = rtp
+    Cache.indexed = {}
+    Cache.indexed_rtp = false
+    vim.opt.rtp:append(Helpers.path("new"))
+    Helpers.fs_create({ "new/lua/foobar/test.lua" })
+    root = Cache.find_root("foobar")
+    assert(root, "foobar root not found")
+    assert.same(Helpers.path("new/lua/foobar"), root)
+  end)
 end)