Copy DateTimeOriginal from EXIF metadata to file modification times and log output appropriately

photocopy.sh

#!/bin/bash

set -euo pipefail


ARCHIVE="/your/gigantic/mess/of/pictures"
MEDIA="/path/to/your/cleaned-up/pictures/"

pushd $ARCHIVE >/dev/null

find . -type f -print0 |
    while IFS= read -r -d $'\0' file; do
        archivepath="$ARCHIVE/$file"
        archivestat="$(stat --format="%Y" "$archivepath")"
        mediapath="$MEDIA/$file"
        if [ -e "$mediapath" ] && [[ ! "$mediapath" =~ .(BUP|IFO)$ ]]; then
            gallerystat="$(stat --format="%Y" "$mediapath")"
            archivedto="$(firejail --quiet --noprofile exiftool -ignoreMinorErrors -quiet -S -DateTimeOriginal "$mediapath" -d "%s" 2>/dev/null | awk '{ print $2 }')"
            if [ "$archivedto" != "" ] \
                && [[ "$archivedto" != "-1" ]] \
                && date --date="@$archivedto" +%Y%m%d%H%M.%S |& cat > /dev/null \
                && [[ "$archivedto" -lt "$archivestat" ]] \
                && [[ "$archivedto" -lt "$gallerystat" ]]; then
                in_touch_format="$(date --date="@$archivedto" +%Y%m%d%H%M.%S)"
                touch -t "$in_touch_format" "$mediapath"
                echo -n "^"
            elif [[ "$archivestat" -lt "$gallerystat" ]]; then
                touch --reference="$archivepath" -m "$mediapath"
                echo -n "+"
            elif [[ "$archivestat" -gt "$gallerystat" ]]; then
                echo -n "!"
                exit 1
            else
                echo -n "."
            fi
        else
            echo -n "x"
        fi
    done

echo