sd-to-mtp-copy.sh

#!/bin/bash

# This copies files from a source folder into a destination. Date-based subfolders are created and files are copied into them.
# The Sony RX1 MTP disconnected frequently so I had to build this script to copy photographs into destination organized by date-based subfolders.
# The date is detected by the output of file modification time $(date -r).
# This script hasn't been tested with paths containing spaces or special characters. Use at your own risk!

confirm() {
    # call with a prompt string or use a default
    read -r -p "${1:-Are you sure? [y/N]} " response
    case "$response" in
        [yY][eE][sS]|[yY]) 
            true
            ;;
        *)
            false
            ;;
    esac
}

echo
echo "Are you running it as ./sd-to-mtp-copy.sh $1 $2 2>&1 | tee copying-\$(date +%s).log"
confirm "Continue? [y/N]"
echo

if [[ -z $1 || ! -d $1 ]];
    then echo "Source path not specified or is unreachable. Aborting!"
    exit 1
fi
if [[ -z $2 || ! -d $2 ]];
    then echo "Destination path not specified or is unreachable. Aborting!"
    exit 1
fi

if ! command -v exiftool &> /dev/null
  then
    $'exiftool could not be found.\nIt\'s best to install it for reliably detecting the dates.\nWe\'ll have to rely on last modification time of files \n :( :( :('
    et=0
  else
    et=1
fi

#echo "Source path $1"
#echo "Destination path $2"

src=$(realpath "$1")
dest=$(realpath "$2")

[[ ${src: -1} != "/" ]] && src="$src/"; :
[[ ${dest: -1} != "/" ]] && dest="$dest/"; :

echo "Source path: $src"
echo "Destination path: $dest"

#files=$(find $src -type f)
#echo $files

shopt -s globstar
for x in $src**; do
  if [[ -f $x ]]; then
    #echo $x
    # Let's just use a temporary variable in case if we need to alter it somehow somewhere etc.
    y="$x"
    if [ "$et" -eq "1" ]; then
      d=$(exiftool -d "%s" -DateTimeOriginal "$y" | grep -oP '\d+')
      if [ ! -z "$d" ]; then
        d=$(date -d @$d +%Y-%m-%d)
      else
        echo "Warning: Could not detect date from exif data. Using File Modification Time for $x"
        d=$(date -r "$y" +%Y-%m-%d)
      fi
    else
      d=$(date -r "$y" +%Y-%m-%d)
    fi

    echo "Log: $x -> $dest$d/$(basename "$y")"
    mkdir -vp "$dest$d"
    cp -vn "$y" "$dest$d/"
  fi
done

echo ""
echo "All done! Files copied to $dest. Existing files were skipped."