make server path call as lua command

Author: joaopluigi

lua/eca/server.lua

@@ -100,8 +100,6 @@ end
 function M:start(opts)
   opts = opts or { initialize = true }
 
-  local custom_path = Config.server_path or ""
-
   local this_file = debug.getinfo(1, "S").source:sub(2)
   local proj_root = vim.fn.fnamemodify(this_file, ":p:h:h:h")
   local script_path = proj_root .. "/scripts/server_path.lua"
@@ -112,7 +110,9 @@ function M:start(opts)
     nvim_exe = "nvim"
   end
 
-  local cmd = { nvim_exe, "-l", script_path, custom_path }
+  local lua_cmd = string.format("lua ServerPath.run(%s)", Config.server_path or "")
+
+  local cmd = { nvim_exe, "--headless", "--noplugin", "-u", script_path, "-c", lua_cmd }
 
   vim.system(cmd, { text = true }, function(out)
     if out.code ~= 0 then

scripts/server_path.lua

@@ -1,16 +1,23 @@
-local PathFinder = require("eca.path_finder")
+local ServerPath = {}
 
-local custom_path = _G.arg[1] or ""
-local path_finder = PathFinder:new()
-local path
+-- Export module
+_G.ServerPath = ServerPath
 
-local ok, err = pcall(function()
-  path = path_finder:find(custom_path)
-end)
+ServerPath.run = function(custom_path)
+  local path_finder = require("eca.path_finder"):new()
+  local path
 
-if not ok then
-  io.stderr:write(tostring(err))
-  os.exit(1)
+  local ok, err = pcall(function()
+    path = path_finder:find(custom_path)
+  end)
+
+  if not ok then
+    io.stderr:write(tostring(err))
+    os.exit(1)
+  end
+
+  io.stdout:write(tostring(path))
+  os.exit(0)
 end
 
-io.stdout:write(path)
+return ServerPath