refactor: move bootstrap code into setupkoenv.lua

add ffi.load patch
add kodev prompt command

reader.lua

@@ -14,37 +14,19 @@ io.stdout:flush()
 
 
 -- load default settings
-require "defaults"
+require("defaults")
 local DataStorage = require("datastorage")
 pcall(dofile, DataStorage:getDataDir() .. "/defaults.persistent.lua")
 
--- set search path for 'require()'
-package.path =
-    "common/?.lua;rocks/share/lua/5.1/?.lua;frontend/?.lua;" ..
-    package.path
-package.cpath =
-    "common/?.so;common/?.dll;/usr/lib/lua/?.so;rocks/lib/lua/5.1/?.so;" ..
-    package.cpath
+require("setupkoenv")
 
--- set search path for 'ffi.load()'
-local ffi = require("ffi")
-local util = require("ffi/util")
-ffi.cdef[[
-    char *getenv(const char *name);
-    int putenv(const char *envvar);
-    int _putenv(const char *envvar);
-]]
-if ffi.os == "Windows" then
-    ffi.C._putenv("PATH=libs;common;")
-end
-
-local _ = require("gettext")
 -- read settings and check for language override
 -- has to be done before requiring other files because
 -- they might call gettext on load
 G_reader_settings = require("luasettings"):open(
     DataStorage:getDataDir().."/settings.reader.lua")
 local lang_locale = G_reader_settings:readSetting("language")
+local _ = require("gettext")
 if lang_locale then
     _.changeLang(lang_locale)
 end