Undelete S3 files in bulk

undelete-s3.sh

#!/bin/bash
#
# Undeletes S3 files in bulk for a provided bucket/prefix/date deleted
#
# Author: Christopher Carman
# Based on https://stackoverflow.com/a/64352685/4175944

set -e

Bucket=$1
Prefix=$2
DateDeleted=$3

[ "$#" -ne 3 ] && echo "Error: Incorrect number of parameters" && error=true
[[ ! $DateDeleted =~ ^[1-9][0-9]{3}-[0-9]{2}-[0-9]{2}$ ]] && echo "Error: DateDeleted must be in yyyy-mm-dd format" && error=true
[[ -z "$AWS_ACCESS_KEY_ID" ]] && echo "Error: Missing environment variable: AWS_ACCESS_KEY_ID" && error=true
[[ -z "$AWS_SECRET_ACCESS_KEY" ]] && echo "Error: Missing environment variable: AWS_SECRET_ACCESS_KEY" && error=true

if [ -n "$error" ]; then
  SCRIPT=`basename "$0"`
  echo ""
  echo "Usage: $SCRIPT <Bucket> <Prefix> <DateDeleted:yyyy-mm-dd>"
  exit 1
fi

echo "✓ Looking for matches"
echo ""

s3Result=$(aws s3api list-object-versions --bucket $Bucket --prefix $Prefix --query "DeleteMarkers[?IsLatest && starts_with(LastModified,'$DateDeleted')].{Key:Key,VersionId:VersionId}")
matches=$(echo "$s3Result" | jq -c '.[]?')

if [ -z "$matches" ]; then
  echo "No matches found"
  exit 0
fi

echo "Matched files:"
echo "$matches"
echo ""

read -p "⚠️ Undelete the above files? (yes/no)" -r REPLY
echo ""

if [[ $REPLY = "yes" ]]
then
  echo "✓ Undeleting files. This may take a while..."
  echo ""

  for row in $matches; do
      key=$(echo "$row" | jq -r '.Key'  )
      versionId=$(echo "$row" | jq -r '.VersionId'  )

      echo $(aws s3api delete-object --bucket $Bucket --key $key --version-id $versionId) & done
  wait
  echo ""

  echo "Done"
else
  echo "Cancelled"
fi