Change handle() to avoid need for global table variable

dotfiles/imapdomo/common.lua

     end
 end
 
-function init_host()
+function init_host(session)
     --
     -- Look for action handler in basepaths; do first one
     --
-    local init = imapdomo.dirs.host .. "/init.lua"
+    local init = session.dirs.host .. "/init.lua"
     if file_exists(init) then
         dofile(init)
         return
     end
 end
 
-function handle(action, basepaths)
+function handle(session)
     --
     -- Look for action handler in basepaths; do first one
     --
         cleanup = true,
         migrate = true
     }
-    if not valid[action] then
-        error("invalid action: " .. action)
+    if not valid[session.action] then
+        error("invalid action: " .. session.action)
         return nil
     end
-    init_host()
-    for k,v in ipairs({imapdomo.dirs.host, imapdomo.dirs.default}) do
-        attempt = v .. "/handlers/" .. action .. ".lua"
+    init_host(session)
+    for k,v in ipairs({session.dirs.host, session.dirs.default}) do
+        attempt = v .. "/handlers/" .. session.action .. ".lua"
         if file_exists(attempt) then
             dofile(attempt)
             return

dotfiles/imapdomo/main.lua

 
 dofile ".imapdomo/common.lua"
 
-imapdomo = {
+handle({
     action = os.getenv("IMAPDOMO_ACTION"),
     dirs = {
         main = os.getenv("HOME") .. "/.imapdomo",
         host = os.getenv("HOME") .. "/.imapdomo/host/" .. shortname(),
         defhost = os.getenv("HOME") .. "/.imapdomo/default",
     }
-}
-
-handle(imapdomo.action)
+})