koreader/datastorage.lua

-- need low-level mechnism to detect android to avoid recursive dependency
local isAndroid = pcall(require, "android")

local DataStorage = {}

function DataStorage:getDataDir()
    if isAndroid then
        return "/sdcard/koreader/"
    else
        return "./"
    end
end

return DataStorage
add datastorage module to handle data directory on various platform On kindle, kobo and pocketbook the data directory is the current running directory but on Android the app is installed in system defined location and users may have no access to that location. The same circumstances should be true for the upcoming Koreader for Ubuntu touch, so the data directory (in which tessdata, dictionaries, global settings, persistant defaults and probably history data are stored) could be stored in another place. 2015-06-15 16:46:43 +08:00			`-- need low-level mechnism to detect android to avoid recursive dependency`
			`local isAndroid = pcall(require, "android")`

			`local DataStorage = {}`

			`function DataStorage:getDataDir()`
			`if isAndroid then`
			`return "/sdcard/koreader/"`
			`else`
			`return "./"`
			`end`
			`end`

			`return DataStorage`