Stop all services on a panic

main.go

@@ -18,6 +18,19 @@ import (
 )
 
 var (
+	// supervisor is the thing that handles all of the
+	// running of services, including tracking whether or not
+	// they're even running
+	//
+	// Why is this a global variable?
+	// Because we need to be able to stop all services and drop to
+	// a shell if our init process panics, so we can suss out what
+	// happened.
+	//
+	// Without a global, this needs all kinds of software architecture
+	// changes
+	supervisor *Supervisor
+
 	sockAddr = "/run/vinit.sock"
 	svcDir   = envOrDefault("SVC_DIR", "/etc/vinit/services")
 	certDir  = "certs"
@@ -78,8 +91,6 @@ func main() {
 }
 
 func Setup() (grpcServer *grpc.Server, err error) {
-	var supervisor *Supervisor
-
 	supervisor, err = New(svcDir)
 	if err != nil {
 		if _, ok := err.(ConfigParseError); !ok {
@@ -147,6 +158,10 @@ func loadTLSCredentials() (credentials.TransportCredentials, error) {
 func panicHandler() {
 	err := recover()
 	if err != nil {
+		if supervisor != nil {
+			supervisor.StopAll()
+		}
+
 		stack := string(debug.Stack())
 		errStr := err.(error).Error()