DokuWiki set timestamp to fix `(external edit)`

dokuwiki_fix_timestamp.sh

#!/bin/bash

# DokuWiki helper script to fix the pages's last modified time stamp
# to match the one recorded in the metadata.
# This fixes pages shown as 'last modified by (external edit)', e.g. after
# restoring the wiki from a backup without preserving the files' timestamp.
#
# Copyright (c) 2018 Damien Regad
#
# Revision history
# 2018-06-19  Created

# ----------------------------------------------------------------------------
# Change this to point to your dokuwiki's data directory
DW_DATA=~/dokuwiki/data

# ----------------------------------------------------------------------------

DW_PAGES=$DW_DATA/pages
DW_META=$DW_DATA/meta

# Process all pages in the wiki
find $DW_PAGES -type f -printf "%P\t%T@\n" |
while read file timestamp
do
    # Remove file extension to get the page name with path
    page=${file%.*}

    # Page's history file - skip if it does not exist
    history=$DW_META/$page.changes
    [[ -e $history ]] || continue

    # Get the most recent timestamp in history file
    dw_time=$(tail -1 $history | cut -f1)

    # Reset the timestamp if the file's is more recent
    if [[ ${timestamp%.*} -gt $dw_time ]]
    then
        echo $page "- updating timestamp" $(date -Is --date="@$timestamp") "->" $(date -Is --date="@$dw_time")
        touch --date="@$dw_time" $DW_PAGES/$file
    fi
done

Thank you too! It helped me after data migration.