feat(lua): add proper support of luv threads

src/nvim/lua/vim.lua

@@ -43,53 +43,6 @@ assert(vim.inspect)
 vim.filetype = package.loaded['vim.filetype']
 assert(vim.filetype)
 
-local pathtrails = {}
-vim._so_trails = {}
-for s in  (package.cpath..';'):gmatch('[^;]*;') do
-    s = s:sub(1, -2)  -- Strip trailing semicolon
-  -- Find out path patterns. pathtrail should contain something like
-  -- /?.so, \?.dll. This allows not to bother determining what correct
-  -- suffixes are.
-  local pathtrail = s:match('[/\\][^/\\]*%?.*$')
-  if pathtrail and not pathtrails[pathtrail] then
-    pathtrails[pathtrail] = true
-    table.insert(vim._so_trails, pathtrail)
-  end
-end
-
-function vim._load_package(name)
-  local basename = name:gsub('%.', '/')
-  local paths = {"lua/"..basename..".lua", "lua/"..basename.."/init.lua"}
-  local found = vim.api.nvim__get_runtime(paths, false, {is_lua=true})
-  if #found > 0 then
-    local f, err = loadfile(found[1])
-    return f or error(err)
-  end
-
-  local so_paths = {}
-  for _,trail in ipairs(vim._so_trails) do
-    local path = "lua"..trail:gsub('?', basename) -- so_trails contains a leading slash
-    table.insert(so_paths, path)
-  end
-
-  found = vim.api.nvim__get_runtime(so_paths, false, {is_lua=true})
-  if #found > 0 then
-    -- Making function name in Lua 5.1 (see src/loadlib.c:mkfuncname) is
-    -- a) strip prefix up to and including the first dash, if any
-    -- b) replace all dots by underscores
-    -- c) prepend "luaopen_"
-    -- So "foo-bar.baz" should result in "luaopen_bar_baz"
-    local dash = name:find("-", 1, true)
-    local modname = dash and name:sub(dash + 1) or name
-    local f, err = package.loadlib(found[1], "luaopen_"..modname:gsub("%.", "_"))
-    return f or error(err)
-  end
-  return nil
-end
-
--- Insert vim._load_package after the preloader at position 2
-table.insert(package.loaders, 2, vim._load_package)
-
 -- These are for loading runtime modules lazily since they aren't available in
 -- the nvim binary as specified in executor.c
 setmetatable(vim, {