Copy file to Dropbox from shell.

drop.sh

# Throw this at the bottom of your .zshrc. 
# Haven't tested this in any other shell, so YMMV.
# This is kinda hacky. First real go at a shell function.
# Feel free to change where your drop config is saved. ~/.drop just worked well.

# Copy file to Dropbox folder.
function drop { 
  # Usage:
  # -d: Temporary dir to send the file to.
  # -s: Set the default Dropbox dir to send all files to.
  # -l: Echo the default Dropbox dir.
  #
  # Caveat: -d takes precedence over -s. So `drop -d ~/Dropbox/Dev -s ~/Dropbox-Work/Code my_file.sh` will send the file to ~/Dropbox/Dev, and all subsequent files to ~/Dropbox-Work/Code.
  
  
  CONFIG=~/.drop  # Where the default Dropbox dir is saved to persist shell logouts.
  DIR=            # One time Dropbox dir
  SET_DIR=        # Set default Dropbox dir
  OUT_DIR=        # Output dir to Dropbox (will change depending on flags)
  if [ ! -f $CONFIG ]; then
    touch $CONFIG
  fi

  DEFAULT_DROPBOX_DIR=$(< $CONFIG)

  COPY_FILE=${@:${#@}} # Get last argument (aka. file to copy.)

  while getopts "ld:s:" OPTION
  do
    case $OPTION in
      d)
        DIR=$OPTARG
        ;;
      s)
        SET_DIR=$OPTARG
        ;;
      l)
        if [ $DEFAULT_DROPBOX_DIR ]; then
          echo $DEFAULT_DROPBOX_DIR
        else
          echo "No directory set. Set it with 'drop -s path/to/dropbox'."
        fi
        return
        ;;
      ?)
        return
        ;;
    esac
  done

  if [ $SET_DIR ]; then
    DEFAULT_DROPBOX_DIR=$SET_DIR
    echo "${DEFAULT_DROPBOX_DIR}" > ~/.drop
  fi

  if [ $DIR ]; then
    OUT_DIR=$DIR
  else
    OUT_DIR=$DEFAULT_DROPBOX_DIR
  fi

  if [[ ! $COPY_FILE = $0 ]]; then # If they just ran `drop` then ignore their mistake.
    if [[ ! $COPY_FILE = $OUT_DIR ]] && [[ ! $COPY_FILE = $SET_DIR ]]; then # AND If they actually provided a file, actually copy it.
      cp -n $COPY_FILE $OUT_DIR
    fi
  fi
}