Added checkPPAs script which checks PPAs for how many things installed from and if the source is still available

checkPPAs.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+for f in /etc/apt/sources.list.d/*.list; do
+    grep -Po "(?<=^deb\s).*?(?=#|$)" "$f" | while read -r ENTRY ; do
+    echo "ENTRY: $ENTRY"
+        HOST=$(cut -d/ -f3 <<< "$ENTRY")
+
+        if [ "ppa.launchpad.net" = "$HOST" ]; then
+          USER=$(cut -d/ -f4 <<< "$ENTRY")
+          PPA=$(cut -d/ -f5 <<< "$ENTRY")
+          packageCount=$(awk '$1=="Package:" {if (a[$2]++ == 0) {system("dpkg -l "$2)}}' /var/lib/apt/lists/*"$USER"*"$PPA"*Packages 2>/dev/null | awk '/^ii/' | wc -l)
+          echo "PPA: ppa:$USER/$PPA"
+          echo "FILENAME: $f"
+          echo "$packageCount package(s) installed"
+          if [ "$packageCount" -eq 0 ] && [ "$1" == "--delete" ]; then
+            sudo rm "$f" && echo "$f deleted"
+          fi
+          echo
+        else
+          USER=$(cut -d/ -f3 <<< "$ENTRY")
+          PPA=$(cut -d/ -f4 <<< "$ENTRY")
+          packageCount=$(awk '$1=="Package:" {if (a[$2]++ == 0) {system("dpkg -l "$2)}}' /var/lib/apt/lists/*"$USER"*Packages 2>/dev/null | awk '/^ii/' | wc -l)
+          echo "REPOSITORY: $USER/$PPA"
+          echo "FILENAME: $f"
+          echo "$packageCount package(s) installed"
+          if [ "$packageCount" -eq 0 ] && [ "$1" == "--delete" ]; then
+            sudo rm "$f" && echo "$f deleted"
+          fi
+          echo
+        fi
+    done
+done