$ gf gen -h
USAGE
    gf gen COMMAND [OPTION]

COMMAND
    dao         automatically generate go files for dao/do/entity
    pb          parse proto files and generate protobuf go files
    pbentity    generate entity message files in protobuf3 format
    service     parse struct and associated functions from packages to generate service go file

DESCRIPTION
    The "gen" command is designed for multiple generating purposes.
    It's currently supporting generating go files for ORM models, protobuf and protobuf entity files.
    Please use "gf gen dao -h" for specified type help.