feat(miniooni): make CLI much more user friendly (#913)

Part of https://github.com/ooni/probe/issues/2184, because I wanted
to allow swapping commands and options more freely.

As a side effect, this PR closes https://github.com/ooni/probe/issues/2248.

AFAICT, every usage that was legal before is still legal. What has
changed seems the freedom to swap commands and options and a much
better help that lists the available options.

internal/registry/allexperiments.go

@@ -1,11 +1,11 @@
 package registry
 
 // Where we register all the available experiments.
-var allexperiments = map[string]*Factory{}
+var AllExperiments = map[string]*Factory{}
 
 // ExperimentNames returns the name of all experiments
 func ExperimentNames() (names []string) {
-	for key := range allexperiments {
+	for key := range AllExperiments {
 		names = append(names, key)
 	}
 	return

internal/registry/dash.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["dash"] = &Factory{
+	AllExperiments["dash"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return dash.NewExperimentMeasurer(
 				*config.(*dash.Config),

internal/registry/dnscheck.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["dnscheck"] = &Factory{
+	AllExperiments["dnscheck"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return dnscheck.NewExperimentMeasurer(
 				*config.(*dnscheck.Config),

internal/registry/dnsping.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["dnsping"] = &Factory{
+	AllExperiments["dnsping"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return dnsping.NewExperimentMeasurer(
 				*config.(*dnsping.Config),

internal/registry/example.go

@@ -12,7 +12,7 @@ import (
 )
 
 func init() {
-	allexperiments["example"] = &Factory{
+	AllExperiments["example"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return example.NewExperimentMeasurer(
 				*config.(*example.Config), "example",

internal/registry/factory.go

@@ -208,6 +208,8 @@ func CanonicalizeExperimentName(name string) string {
 		name = "dnscheck"
 	case "stun_reachability":
 		name = "stunreachability"
+	case "web_connectivity@v_0_5":
+		name = "web_connectivity@v0.5"
 	default:
 	}
 	return name
@@ -216,7 +218,7 @@ func CanonicalizeExperimentName(name string) string {
 // NewFactory creates a new Factory instance.
 func NewFactory(name string) (*Factory, error) {
 	name = CanonicalizeExperimentName(name)
-	factory := allexperiments[name]
+	factory := AllExperiments[name]
 	if factory == nil {
 		return nil, fmt.Errorf("no such experiment: %s", name)
 	}

internal/registry/fbmessenger.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["facebook_messenger"] = &Factory{
+	AllExperiments["facebook_messenger"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return fbmessenger.NewExperimentMeasurer(
 				*config.(*fbmessenger.Config),

internal/registry/hhfm.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["http_header_field_manipulation"] = &Factory{
+	AllExperiments["http_header_field_manipulation"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return hhfm.NewExperimentMeasurer(
 				*config.(*hhfm.Config),

internal/registry/hirl.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["http_invalid_request_line"] = &Factory{
+	AllExperiments["http_invalid_request_line"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return hirl.NewExperimentMeasurer(
 				*config.(*hirl.Config),

internal/registry/httphostheader.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["http_host_header"] = &Factory{
+	AllExperiments["http_host_header"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return httphostheader.NewExperimentMeasurer(
 				*config.(*httphostheader.Config),

internal/registry/ndt.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["ndt"] = &Factory{
+	AllExperiments["ndt"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return ndt7.NewExperimentMeasurer(
 				*config.(*ndt7.Config),

internal/registry/psiphon.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["psiphon"] = &Factory{
+	AllExperiments["psiphon"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return psiphon.NewExperimentMeasurer(
 				*config.(*psiphon.Config),

internal/registry/quicping.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["quicping"] = &Factory{
+	AllExperiments["quicping"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return quicping.NewExperimentMeasurer(
 				*config.(*quicping.Config),

internal/registry/riseupvpn.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["riseupvpn"] = &Factory{
+	AllExperiments["riseupvpn"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return riseupvpn.NewExperimentMeasurer(
 				*config.(*riseupvpn.Config),

internal/registry/run.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["run"] = &Factory{
+	AllExperiments["run"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return run.NewExperimentMeasurer(
 				*config.(*run.Config),

internal/registry/signal.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["signal"] = &Factory{
+	AllExperiments["signal"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return signal.NewExperimentMeasurer(
 				*config.(*signal.Config),

internal/registry/simplequicping.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["simplequicping"] = &Factory{
+	AllExperiments["simplequicping"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return simplequicping.NewExperimentMeasurer(
 				*config.(*simplequicping.Config),

internal/registry/sniblocking.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["sni_blocking"] = &Factory{
+	AllExperiments["sni_blocking"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return sniblocking.NewExperimentMeasurer(
 				*config.(*sniblocking.Config),

internal/registry/stunreachability.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["stunreachability"] = &Factory{
+	AllExperiments["stunreachability"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return stunreachability.NewExperimentMeasurer(
 				*config.(*stunreachability.Config),

internal/registry/tcpping.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["tcpping"] = &Factory{
+	AllExperiments["tcpping"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return tcpping.NewExperimentMeasurer(
 				*config.(*tcpping.Config),

internal/registry/telegram.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["telegram"] = &Factory{
+	AllExperiments["telegram"] = &Factory{
 		build: func(config any) model.ExperimentMeasurer {
 			return telegram.NewExperimentMeasurer(
 				config.(telegram.Config),

internal/registry/tlsping.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["tlsping"] = &Factory{
+	AllExperiments["tlsping"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return tlsping.NewExperimentMeasurer(
 				*config.(*tlsping.Config),

internal/registry/tlstool.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["tlstool"] = &Factory{
+	AllExperiments["tlstool"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return tlstool.NewExperimentMeasurer(
 				*config.(*tlstool.Config),

internal/registry/tor.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["tor"] = &Factory{
+	AllExperiments["tor"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return tor.NewExperimentMeasurer(
 				*config.(*tor.Config),

internal/registry/torsf.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["torsf"] = &Factory{
+	AllExperiments["torsf"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return torsf.NewExperimentMeasurer(
 				*config.(*torsf.Config),

internal/registry/urlgetter.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["urlgetter"] = &Factory{
+	AllExperiments["urlgetter"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return urlgetter.NewExperimentMeasurer(
 				*config.(*urlgetter.Config),

internal/registry/vanillator.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["vanilla_tor"] = &Factory{
+	AllExperiments["vanilla_tor"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return vanillator.NewExperimentMeasurer(
 				*config.(*vanillator.Config),

internal/registry/webconnectivity.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["web_connectivity"] = &Factory{
+	AllExperiments["web_connectivity"] = &Factory{
 		build: func(config any) model.ExperimentMeasurer {
 			return webconnectivity.NewExperimentMeasurer(
 				config.(webconnectivity.Config),

internal/registry/webconnectivityv05.go

@@ -12,9 +12,7 @@ import (
 )
 
 func init() {
-	// Note: the name inserted into the table is the canonicalized experiment
-	// name though we advertise using `web_connectivity@v0.5`.
-	allexperiments["web_connectivity@v_0_5"] = &Factory{
+	AllExperiments["web_connectivity@v0.5"] = &Factory{
 		build: func(config any) model.ExperimentMeasurer {
 			return webconnectivity.NewExperimentMeasurer(
 				config.(*webconnectivity.Config),

internal/registry/whatsapp.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	allexperiments["whatsapp"] = &Factory{
+	AllExperiments["whatsapp"] = &Factory{
 		build: func(config interface{}) model.ExperimentMeasurer {
 			return whatsapp.NewExperimentMeasurer(
 				*config.(*whatsapp.Config),