remove com.apple.macl xattr

demacl

#!/bin/bash
# Free fucking beer license. It may break and you assume all responsibility.
set -eEuo pipefail

die() {
  echo >&2 "$@"
  exit 1
}

[[ $# = 1 ]] || die "$0 {target}  <-- missing file or directory to remove all xattrs from"
target="$(/usr/bin/readlink -f "$1")"
[[ -f "$target" || -d "$target" ]] || die "$0 {target}  <-- must be a file or a directory"
prefix="$(/usr/bin/dirname "$target")/.$(/usr/bin/basename "$target")"
new="$prefix.$$.new"
orig="$prefix.$$.orig"
lock="$prefix.macl-lock"

# Remove stuff on normal or abnormal termination
# $orig is not deleted here in case of error
trap 'e=$?; trap - EXIT; /bin/rm -rf "$new" "$lock"; exit $e' EXIT

# mkdir is atomic on macOS, and suffices when flock is unavailable
if ! /bin/mkdir "$lock"; then
  echo >&2 "$0 ERROR"
  echo >&2 "    Operation already in progress OR"
  echo >&2 "    insufficient rights to write $lock"
       die "    Maybe \`sudo $0 $*\`?"
fi

# Prevent creating duplicate nested directories
if [[ -d "$target" ]]; then
  rsync_target="$target/"
else
  rsync_target="$target"
fi

# Hard copy $target as $new
/usr/bin/rsync -av "$rsync_target" "$new"

# Verify original == $new
/usr/bin/diff -qr "$target" "$new" || die "$0 copy failure (out of space OR bad media?). Original unchanged."

# Rotate original out of the way
/bin/mv -v "$target" "$orig"

# Slide in the new one
/bin/mv -v "$new" "$target"

# Remove the now duplicate original
/bin/rm -rf "$orig"