d2plugin

type Plugin interface {
	// Info returns the current info information of the plugin.
	Info(context.Context) (*PluginInfo, error)

	Flags(context.Context) ([]PluginSpecificFlag, error)

	HydrateOpts([]byte) error

	// Layout runs the plugin's autolayout algorithm on the input graph
	// and returns a new graph with the computed placements.
	Layout(context.Context, *d2graph.Graph) error

	// PostProcess makes changes to the default render
	PostProcess(context.Context, []byte) ([]byte, error)
}

type PluginInfo struct {
	Name      string `json:"name"`
	ShortHelp string `json:"shortHelp"`
	LongHelp  string `json:"longHelp"`

	// These two are set by ListPlugins and not the plugin itself.
	// bundled | binary
	Type string `json:"type"`
	// If Type == binary then this contains the absolute path to the binary.
	Path string `json:"path"`
}

type PluginSpecificFlag struct {
	Name    string
	Type    string
	Default interface{}
	Usage   string
	// Must match the tag in the opt
	Tag string
}