Improve panic message for empty connection

internal/models/openvpn.go

@@ -5,10 +5,10 @@ import (
 )
 
 type OpenVPNConnection struct {
-	IP       net.IP
-	Port     uint16
-	Protocol NetworkProtocol
-	Hostname string // Privado for tls verification
+	IP       net.IP          `json:"ip"`
+	Port     uint16          `json:"port"`
+	Protocol NetworkProtocol `json:"protocol"`
+	Hostname string          `json:"hostname"` // Privado for tls verification
 }
 
 func (o *OpenVPNConnection) Equal(other OpenVPNConnection) bool {

internal/models/servers.go

@@ -13,6 +13,18 @@ type AllServers struct {
 	Windscribe WindscribeServers `json:"windscribe"`
 }
 
+func (a *AllServers) Count() int {
+	return len(a.Cyberghost.Servers) +
+		len(a.Mullvad.Servers) +
+		len(a.Nordvpn.Servers) +
+		len(a.Pia.Servers) +
+		len(a.Privado.Servers) +
+		len(a.Purevpn.Servers) +
+		len(a.Surfshark.Servers) +
+		len(a.Vyprvpn.Servers) +
+		len(a.Windscribe.Servers)
+}
+
 type CyberghostServers struct {
 	Version   uint16             `json:"version"`
 	Timestamp int64              `json:"timestamp"`

internal/openvpn/loop.go

@@ -2,6 +2,8 @@ package openvpn
 
 import (
 	"context"
+	"encoding/json"
+	"fmt"
 	"net"
 	"net/http"
 	"strings"
@@ -119,7 +121,15 @@ func (l *looper) Run(ctx context.Context, wg *sync.WaitGroup) {
 			return
 		}
 		if connection.IP == nil {
-			panic("PLEASE CREATE AN ISSUE with this log: https://github.com/qdm12/gluetun/issues")
+			serverSelectionJSON, _ := json.Marshal(settings.Provider.ServerSelection)
+			connectionJSON, _ := json.Marshal(connection)
+			message := fmt.Sprintf(`
+			PLEASE CREATE AN ISSUE with this log: https://github.com/qdm12/gluetun/issues
+			Server selection: %s
+			AllServers count: %d
+			connection: %s
+			`, string(serverSelectionJSON), allServers.Count(), string(connectionJSON))
+			panic(message)
 		}
 		lines := providerConf.BuildConf(connection, l.username, settings)