pkg-remove

#!/bin/sh
# pkg-remove removes macOS packages using the receipt
# Copyright: 2020 by Felix Buenemann
# License: MIT
set -eo pipefail
volume=/
dryrun=false
force=false
for arg in "$@"; do
  case $arg in
    --volume=*)
      volume=${arg#*=}
      shift
    ;;
    -v|--volume)
      shift
      volume=$1
      shift
    ;;
    -n|--dry-run)
      force=true
      dryrun=true
      shift
    ;;
    -f|--force)
      force=true
      shift
    ;;
    -h|--help)
      echo "Usage: $0 [-n|--dry-run] [v|--volume VOLUME] PKGID [..PKGID]"
      exit 0
    ;;
    -*)
      echo "Unknown option: $arg (see -h for help)" >/dev/stderr
      exit 1
    ;;
  esac
done

if $dryrun; then
  echo "Dry-run active, simulating changes. Nothing will be removed!" >/dev/stderr
fi

for pkgid in "$@"; do
  location=`pkgutil --volume "$volume" --pkg-info "$pkgid" | \
    awk -F': ' '/^(volume|location):/{printf $2}' | tr -s /`

  root=`pkgutil --volume "$volume" --only-dirs --files "$pkgid" | head -n1 ||:`
  echo $root

  if [ ! -d "$location" ]; then
    echo "Package $pkgid install location '$location' doesn't exist" >/dev/stderr
  else
    if ! $force; then
      read -p "Remove package $pkgid from '$location'? (y/N) " remove
      if [ "$remove" != "y" ]; then
        echo "Skipping $pkgid" >/dev/stderr
        continue
      fi
    else
      echo "Removing package $pkgid from '$location'" >/dev/stderr
    fi

    extra=
    if [ -d "$location/$root/Contents/_MASReceipt" ]; then
      echo "Detected Mac AppStore receipt, adding to deleted files" >/dev/stderr
      extra="$root/Contents/_MASReceipt\n$root/Contents/_MASReceipt/receipt\n"
    fi

    if $dryrun; then
      (pkgutil --volume "$volume" --files "$pkgid" && printf "$extra") \
        | tail -r \
        | awk "{ printf \"$location/%s%c\", \$0, 0 } END { printf \"$location\" }" \
        | tr -s / \
        | xargs -0 -n1 echo rm -df
    else
      # use relative paths so we can do more deletes in a single rm call
      (pkgutil --volume "$volume" --files "$pkgid" && printf "$extra") \
        | tail -r \
        | tr '\n' '\0' \
        | (cd "$location" && sudo xargs -0 rm -df)
      # ignore errors when removing location (eg. /Applications)
      sudo rm -df "$location" 2>/dev/null ||:
    fi
  fi

  if ! $dryrun && [ "$root" != "" ] && [ -d "$location/$root" ]; then
    echo "Package root directory '$location/$root' still exists!" >/dev/stderr
    continue
  fi

  if ! $force; then
    read -p "Remove package $pkgid install receipt? (y/N) " remove
    if [ "$remove" != "y" ]; then
      echo "Skipping $pkgid" >/dev/stderr
      continue
    fi
  else
    echo "Removing package $pkgid install receipt" >/dev/stderr
  fi

  if ! $dryrun; then
    sudo pkgutil --volume "$volume" --forget "$pkgid"
  fi
done