Restructure a httrack website

restructure.sh

#!/bin/bash
# Restructurer for httrack mirror.
# Also works on wget mirrors that you want to be organized.
read -rp "Enter path to current mirror: " existingmirror
read -rp "Enter path to output directory: " outdir
read -rp 'Add any flags you want to the mirror (usually you will want one of the -N flags). By default, the mirror will add the "--disable-security-limits" and "-A1000000000000" flags to speed up the download, so you cant enter those (script will fail if you do!): ' flags
cd $existingmirror

# If index.html does not exist, then we generate one using tree
if [[ -f index.html ]]; then
  echo "No index.html found. restructure.sh will generate one using tree."
  tree -H . > index.html
fi

# Changed port here, because 8000 is fairly common.
python -m SimpleHTTPServer 9482 &
server_PID=$!

# And now we initiate the mirroring operation.
httrack --disable-security-limits -A1000000000000 $flags -O $outdir localhost:9482

if [[ $? != 0 ]]; then
  echo "Mirroring failed with exit status $? . Exiting with exit code 1."
  kill -9 $server_PID
  exit 1
fi

echo "Mirror was succesful. Killing webserver..."
kill -9 $server_PID
echo "done."
echo "Exiting with exit code 0."
exit 0