#!/bin/bash
set -e
error() { echo "$@" 1>&2; }
fail() { [ $# -eq 0 ] || error "$@"; exit 1; }

workd="$1"
if [ -z "$workd" ]; then
    TEMP_D=$(mktemp -d ${TMPDIR:-/tmp}/${0##*/}.XXXXXX)
    trap 'rm -Rf "${TEMP_D}"' EXIT
    workd="$TEMP_D"
fi

cd "$workd"

which getfacl >/dev/null 2>&1 || { echo "no getfacl in PATH"; exit 1; }

mkdir -p orig/no-defaults orig/defaults orig/modified-defaults 

## remove the defaults on our extract dirs so they are not inherited
for d in extract-without extract-with; do
  mkdir -p "$d" && setfacl --remove-default "$d"
  if getfacl "$d" | grep -q 'default:'; then
     fail "getfacl showed defaults after setfacl removed on $d"
  fi
done

## set 'default' perms on modified-defaults and defaults
defperms="--modify u::rwx --modify g::r-x --modify other::r-x"
modperms="--modify u::rwx --modify g::rwx --modify other::---"
setfacl --default $defperms orig/defaults
setfacl --default $modperms orig/modified-defaults
setfacl --remove-default    orig/no-defaults

getfacl orig/no-defaults | grep -q 'default:' &&
   fail "getfacl showed defaults after setfacl removed on no-defaults"

## create 2 tarballs for each dir.  One with '--acl' and one without.
for d in no-defaults defaults modified-defaults; do
   ( cd orig &&
     tar --xattrs '--xattrs-include=*' --acl     -cpf ../$d-with.tar $d &&
     tar --xattrs '--xattrs-include=*'           -cpf ../$d-without.tar $d &&
     tar --xattrs '--xattrs-include=*' --no-acl  -cpf ../$d-noacl.tar $d )
done

## extract both source tarballs
for d in no-defaults defaults modified-defaults; do
   for s in with without noacl; do
      mkdir -p extract-without/src-$s extract-with/src-$s extract-noacl/src-$s
      ( cd extract-without/src-$s &&
        tar --xattrs '--xattrs-include=*'          -xpf ../../$d-$s.tar )
      ( cd extract-with/src-$s &&
        tar --xattrs '--xattrs-include=*' --acl    -xpf ../../$d-$s.tar )
      ( cd extract-noacl/src-$s &&
        tar --xattrs '--xattrs-include=*' --no-acl -xpf ../../$d-$s.tar )
  done
done

## now just list the extracted dirs
for d in orig/* extract-*/*/*; do
   [ -d "$d" ] || continue
   # touch 'foo' in extract dirs
   [ "${d#orig/}" != "$d" ] || touch "$d/foo"
   fname=$(echo "$d" | sed 's,/,_,g')
   (
   echo === $d ===
   echo " == getfacl $d =="
   getfacl $d | sed 's,^, ,'
   echo " == ls -l $d =="
   ls -l "$d" | sed 's,^, ,'
   echo " == ls -ld $d =="
   ls -ld "$d" | sed 's,^, ,'
   echo
   ) | tee "$fname.info"
done