This is a bridge executable jar to install optifine through terminal/command line.
This was originally designed to allow the installation of optifine in vanilla in GDLauncher.
Place the optifine jar in the "ofb" subdirectory of the directory you are going to call this from.
Then call this with the command java -jar <jar_name> <minecraft_instances_directory> [logger_options].
By default this redirects the whole optifine output to a log file.
You can use -log=none as your second arg to stop optifine from logging or you can use -log=console to print the log to console