In polybar/cron, newsboat won't update if an instance is already

running. This waits until the instance is done and updates it
automatically.

get_newsboat.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Polybar doesn't like it when you do stuff.
+
+loop() {
+    while true ; do
+        OUTPUT=$(newsboat -x $1)
+        if [ $? == 0 ]
+        then
+            echo $OUTPUT
+            break
+        fi
+        sleep 1
+    done
+}
+
+case $1 in
+    update|up)
+        loop reload
+        ;;
+    fetch|fe)
+        loop print-unread | sed 's/ .*/ articles/;s/^/ /'
+        ;;
+esac