Remove nuisance autoncons output when empty

If no serial console detected, don't bother mentioning it.

confluent_osdeploy/el10-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh

@@ -42,7 +42,9 @@ if ! grep console= /proc/cmdline >& /dev/null; then
     autocons=$(/opt/confluent/bin/autocons)
     autoconsdev=${autocons%,*}
     autocons=${autocons##*/}
-    echo "Automatic console configured for $autocons"
+    if [ ! -z "$autocons" ]; then
+        echo "Automatic console configured for $autocons"
+    fi
 fi
 echo "Initializing confluent diskless environment"
 echo -n "udevd: "

confluent_osdeploy/el7-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh

@@ -39,7 +39,9 @@ echo sshd:x:30:30:SSH User:/var/empty/sshd:/sbin/nologin >> /etc/passwd
 if ! grep console= /proc/cmdline >& /dev/null; then
     autocons=$(/opt/confluent/bin/autocons)
     autocons=${autocons##*/}
-    echo "Automatic console configured for $autocons"
+    if [ ! -z "$autocons" ]; then
+        echo "Automatic console configured for $autocons"
+    fi
 fi
 echo "Initializing confluent diskless environment"
 echo -n "udevd: "

confluent_osdeploy/el8-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh

@@ -42,7 +42,9 @@ if ! grep console= /proc/cmdline >& /dev/null; then
     autocons=$(/opt/confluent/bin/autocons)
     autoconsdev=${autocons%,*}
     autocons=${autocons##*/}
-    echo "Automatic console configured for $autocons"
+    if [ ! -z "$autocons" ]; then
+        echo "Automatic console configured for $autocons"
+    fi
 fi
 echo "Initializing confluent diskless environment"
 echo -n "udevd: "

confluent_osdeploy/suse15-diskless/initramfs/lib/dracut/hooks/cmdline/10-confluentdiskless.sh

@@ -40,7 +40,9 @@ echo sshd:x:30:30:SSH User:/var/empty/sshd:/sbin/nologin >> /etc/passwd
 if ! grep console= /proc/cmdline >& /dev/null; then
     autocons=$(/opt/confluent/bin/autocons)
     autocons=${autocons##*/}
-    echo "Automatic console configured for $autocons"
+    if [ ! -z "$autocons" ]; then
+        echo "Automatic console configured for $autocons"
+    fi
 fi
 echo "Initializing confluent diskless environment"
 echo -n "udevd: "

confluent_osdeploy/ubuntu20.04-diskless/initramfs/scripts/init-premount/confluent

@@ -55,7 +55,9 @@ get_remote_apikey() {
 if ! grep console= /proc/cmdline > /dev/null; then
     autocons=$(/opt/confluent/bin/autocons)
     autocons=${autocons##*/}
-    echo "Automatic console configured for $autocons"
+    if [ ! -z "$autocons" ]; then
+        echo "Automatic console configured for $autocons"
+    fi
 fi
 echo sshd:x:30:30:SSH User:/var/empty/sshd:/sbin/nologin >> /etc/passwd
 modprobe ib_ipoib