REPL should tell users whether metrics, tracing, etc. are turned on/off

[tsandall]

Currently the REPL allows users to turn on/off features like metrics, tracing, etc. Users can toggle these but they can't tell whether the features are on off.

It would be nice if users could check which features are enabled.

[BenderScript]

Should we add a new command such as "show debug"?

[tsandall]

Sure, that sounds reasonable. What I would probably do is create a settings struct that can be serialized into JSON and printed to the console. Feel free to follow that approach or not (it seems like it'll be easy to keep the settings in-sync w/ the show debug command that way.)

[BenderScript]

`> show debug
{
"Trace": false,
"Metrics": false,
"Instrument": false
}

`

[tsandall]

Cool. We typically add struct field tags and make the fields follow snake_case. E.g., the output should be:

{
  "trace": false,
  "metrics": false,
  "instrument": false
}

[BenderScript]

It is snake case but Github is not formatting properly. But struct field tags are there, do you want me to make them lower case?

[tsandall]

Yes, the struct should look like this (modulo gofmt):

type Foo struct {
  A int `json:"a"`
  SomeField int `json:"some_field"`
}

[BenderScript]

sure, will do.

[BenderScript]

> show debug
{
	"trace": false,
	"metrics": false,
	"instrument": false
}
>