Prunes ForgeEssentials backups (probably badly)

fePruneBackups.sh

#!/bin/bash
BASE=$(pwd)
TEMPDIR="temp"
DELAY=2

echo "Running from: $BASE"
echo "Starting in $DELAY seconds..."
sleep $DELAY

mkdir -p ./$TEMPDIR

## List of all dates
DATES=$(ls | egrep -o '[0-9]{4}-[0-9]{1,2}-[0-9]{1,2}' | tr '-' ' ' | sort -n | uniq)

## Years
DATE_YEARS=$(echo "$DATES" | awk '{ print $1 }' | sort -n | uniq)

## Iterate through years
for year in $DATE_YEARS; do

  ## Dates for this year
  DATES_YEAR=$(echo "$DATES" | egrep -o "$year [0-9]{1,2} [0-9]{1,2}")
  
  ## Months for this year
  MONTHS=$(echo "$DATES_YEAR" | awk '{ print $2 }' | sort -n | uniq)
  
  ## Iterate through months
  for month in $MONTHS; do
    
    ## Days for this month
    DAYS=$(echo "$DATES_YEAR" | egrep -o "$year $month [0-9]{1,2}" | awk '{ print $3 }'| sort -n | uniq)
    
    ## Iterate through days
    for day in $DAYS; do
      echo -n "Pruning $year-$month-$day: "
      
      ## Find backups
      echo -n "Listing... "
      FILES=$(find . -maxdepth 1 -type f -name "*$year-$month-$day*.zip")
      NUM_FILES=$(echo "$FILES" | wc -l)
      
      if [ $NUM_FILES -gt 1 ]; then
        ## Move selected backups
        echo -n "Saving $NUM_FILE... "
        mv $(echo "$FILES" | head -1) ./$TEMPDIR/
        
        ## Update list and prune
        echo -n "Listing... "
        FILES=$(find . -maxdepth 1 -type f -name "*$year-$month-$day*.zip")
        NUM_FILES=$(echo "$FILES" | wc -l)
        
        if [ $NUM_FILES -gt 0 ]; then
          echo -n "Deleting $NUM_FILES... "
          rm -f $FILES
        fi
        
        echo -n "Moving back... "
        mv ./$TEMPDIR/*.zip ./
      fi
      
      echo "Done!"
    done
  done
done

rm -rf ./$TEMPDIR