Bash/Zsh function to decompress a set of files into a subdirectory

unzipped.sh

# Unzip a set of files to an "unzipped" subdirectory
#
# Example:
#
#   unzipped *.zip *.tar.gz
#
# will create the "unzipped" directory if not present, and decompress all the files into that directory.
function unzipped {
  for f in "$@" ; do
    directory=$(dirname "$f")
    base=$(basename "$f")
    filename=${base%.*}
    mkdir -p "$directory/unzipped"
    echo "$f"
    if [[ $f = *.tar.gz ]]; then
      filename=${filename%.*}  # strip off the remaining ".tar" suffix
      mkdir -p "$directory/unzipped/$filename"
      /usr/bin/tar -zxv -C "$directory/unzipped/$filename" -f "$f"
    else
      /usr/bin/unzip -o -d "$directory/unzipped/$filename" "$f"
    fi
  done
}