NewCli create a new cli object.

Author author.

HomePage homepage.

ShortTitle shortTitle.

SummaryTitle summary title.

Title title.

Version version.

Cli is wrapper for root command and add common options.

CommandBuilder responsible for building root command and register all sub commands to the root command.

EncodeCommand is responsible for encoding.

ExitError implement the Error interface and add some custom error code nad error message.

PlayCommand responsible for playing the ASCII image in the terminal.

ServerCommand define the server command that responsible for serving a http server for ASCII image.

VersionCommand is responsible show the version.

Command define the command basic operations.