swag v1.6.6 flag provided but not defined

[easonlin404]

github.com/swaggo/swag v1.6.6", but short command options almost undefined, such as -g:
swag init -g cmd/main.go

Incorrect Usage: flag provided but not defined: -g

NAME:
swag init - Create docs.go

USAGE:
swag init [command options] [arguments...]


OPTIONS:
   --generalInfo value       Go file path in which 'swagger general API Info' is written (default: "main.go")
   --dir value               Directory you want to parse (default: "./")
   --exclude value           exclude directories and files when searching, comma separated
   --propertyStrategy value  Property Naming Strategy like snakecase,camelcase,pascalcase (default: "camelcase")
   --output value            Output directory for all the generated files(swagger.json, swagger.yaml and doc.go) (default: "./docs")
   --parseVendor             Parse go files in 'vendor' folder, disabled by default (default: false)
   --parseDependency         Parse go files in outside dependency folder, disabled by default (default: false)
   --markdownFiles value     Parse folder containing markdown files to use as description, disabled by default
   --generatedTime           Generate timestamp at the top of docs.go, true by default (default: false)
   --help, -h                show help (default: false)

2020/05/21 09:54:52 flag provided but not defined: -g

[easonlin404]

as mentioned #705 (comment)