First commit of files to backup and restore Solus packages

solus_package_backup.sh

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+function usage {
+   echo "./$(basename "$0")[-h] [-v] -- Makes a list of installed packages for Solus, and saves it to ~/InstalledPackages
+
+   where:
+      -h  show this help text
+      -v  Show verbose output
+   "
+}
+
+function print_out {
+   local MESSAGE="$*"
+   if [[ "${VERBOSE}" == true ]];then
+      echo "$MESSAGE"
+   fi
+}
+
+function execute {
+   local COMMAND="$*"
+   if [[ "${VERBOSE}" == true ]];then
+      bash -c "${COMMAND}"
+   fi
+}
+
+FILE=~/InstalledPackages
+
+# list of arguments expected in the input
+optstring=":hv"
+
+while getopts ${optstring} option; do
+  case "${option}" in
+   h) usage
+      exit
+      ;;
+   v)
+      VERBOSE='true'
+      print_out "Verbose mode is ON"
+      ;;
+   ?)
+      echo "Invalid option: -${OPTARG}." >&2
+      echo usage >&2
+      exit 1
+      ;;
+  esac
+done
+shift $((OPTIND - 1))
+
+print_out "Exporting all installed package names to  ${FILE}"
+eopkg li | cut -d " " -f 1 | tr '\n' ' ' > ${FILE}
+
+if [ -s "${FILE}" ]; then
+    print_out "${FILE} successfully written."
+else
+    echo "${FILE} does not exist or is empty! Something went wrong. Trying to cat the file:"
+
+    cat ~/InstalledPackages
+fi
+
+print_out "Content of ${FILE}"
+execute "cat ${FILE} && echo"
+
+echo "Finished exporting package names"