Add script to check dependencies

bash/check-dependencies

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+# Abort if any command fails.
+set -e
+
+# Check for presence of a command.
+# $1 is name of dependency
+# $2 is command that gets run to check for it
+# eg. check "disroot.org reachable?" "ping disroot.org"
+check() {
+  echo -n "Checking for $1... "
+
+  if eval $2 &> /dev/null ; then
+    echo ✔︎
+    false
+  else
+    echo ✗
+    storytime_ready=false
+    true
+  fi
+}
+
+# assume ready until proven otherwise
+storytime_ready=true
+
+if check "cron" "crontab -l"; then
+  echo "  Please install cron."
+fi
+
+if check "mimic3" "mimic3 --version"; then
+  echo "  Please install mimic3."
+  echo "  Via pip: pip3 install mycroft-mimic3-tts[all]"
+fi
+
+if check "ffmpeg 7" "ffmpeg -version | grep \"ffmpeg version 7\""; then
+  echo "  Please install ffmpeg ~7."
+fi
+
+if check "feed2exec" "feed2exec"; then
+  echo "  Please install feed2exec."
+  echo "  Via pip: pip3 install feed2exec"
+fi
+
+# final check for readiness
+if $storytime_ready; then
+  echo -e "\nReady for Storytime!"
+else
+  echo -e "\nStorytime is not ready to go. Please install the missing dependencies."
+fi