#!/usr/bin/env sh

# A short "back-up" script used to archive directories neatly, optionally encrypt

bakdir=$HOME/store/bak

e=""
case "$1" in
    "-g") e="--encrypt"; shift ;;
    "-s") e="--encrypt --symmetric --sign --cipher-algo AES256"; shift
esac;

for k in $*; do
  if [ -d "$k" ]; then
    strip=${k%/}
    [ "$(echo $strip | cut -c 1)" != "/" ] && strip=$PWD/$strip
    folder=${strip##*/}
    path=$(echo ${strip%/*} | sed "s#$HOME##")
    stamp="$(date +%y%m%d-%H%M%S)"
    name="$(echo $bakdir/$path/$folder-$stamp.tar.xz | sed 's#//#/#g')"
    echo Archiving and compressing "$name" ...
    mkdir -p "$bakdir"/"$path"
    cd "$k" || return 127 ; cd ..
    if [ -n "$e" ]; then
      echo Encrypting "$name"
      tar --xz --atime-preserve -p -cO "$folder" | gpg "$e" - > "$name".gpg
    else
      tar --xz --atime-preserve -p -cf "$name" "$folder"
    fi;
  else
    echo Skipping "$k", not a directory
  fi
done