move-phone-pics.sh

#!/bin/bash

# Clear older photos and videos of android phone.
# Combined with https://syncthing.net/

# Howto:
#
# *Warning* make sure you have good backups and multiple copies of things first!
#
# 1) Install synthing on the phone and a laptop. Configure sync of at least DCIM folder.
# 2) Run this script on the laptop (update paths for your devices).
# 3) Watch as syncthing magically deletes old pics off your phone freeing up valuable space. Hurrah.

# http://serverfault.com/a/505953/15016

phone_base="/home/tim/oneplus5t-home/"
pics_base="/home/tim/Pictures/oneplus5t/"

camera="DCIM/Camera/"
whatsapp_vid="WhatsApp/Media/WhatsApp Video/"
whatsapp_vid_sent="WhatsApp/Media/WhatsApp Video/Sent/"
whatsapp_img="WhatsApp/Media/WhatsApp Images/"
whatsapp_img_sent="WhatsApp/Media/WhatsApp Images/Sent/"

# https://stackoverflow.com/a/14447471/10245
dryrun=false
while getopts "n" opt; do
  case $opt in
    n)
      echo "-n was triggered for dry run"
      dryrun=true
      ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit 1
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
      ;;
  esac
done

echo "laptop disk space:"
df -h "$pics_base"

for item in "$camera" "$whatsapp_vid" "$whatsapp_vid_sent" "$whatsapp_img" "$whatsapp_img_sent" ; do
	from="$phone_base$item"
	to="$pics_base$item"

	echo "clearing down $from >> $to"


	echo "before move:"
	du -sh "$from" "$to"

	if [ $dryrun == true ]; then
	  # list (preview)
	  find "$from" -maxdepth 1 -mtime +90 -type f -exec echo "{} >> $to" \;
	else
	  mkdir -p "$to"

	  echo "moving..."
	  find "$from" -maxdepth 1 -mtime +90 -type f -exec mv -n "{}" "$to" \;

	  echo "after move:"
	  du -sh "$from" "$to"
	fi
	echo
done