Merges xchat logs (or any other logs of textual form). Run as: ./merge_logs.sh <source directory> <output directory>

merge_logs.sh

#!/bin/bash
directory=$1
output_dir=$2
start=$(date +%s)
start_millis=$(date +%s.%N)

if [ ! -d "$directory" ];then
    echo "Source directory is not a directory or does not exist!"
    exit
fi

if [ ! -e "$output_dir" ];then
    mkdir "$output_dir"
elif [ ! -d "$output_dir" ];then
    echo "Output directory is exists and is not a directory!"
fi

echo "Processing..."

SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
for sub_dir in $(find "$directory" -type f -exec ls {} \;);do
    grep -v -e "^\*\*\*\* BEGIN LOGGING AT" -e "^\*\*\*\* ENDING LOGGING AT" "$sub_dir" >> "$output_dir/$(basename "$sub_dir")"
done
IFS=$SAVEIFS

end=$(date +%s)
end_millis=$(date +%s.%N)
diff=$(( $end - $start ))
diff_millis_untrimmed=$(echo "$end_millis - $start_millis" | bc)
diff_millis=${diff_millis_untrimmed:0:4}
echo "Done in "$diff"s ("$diff_millis"ms)."