Clear the Schema Registry of all the schemas.

sr_clean.sh

#!/bin/bash

# ./sr_clean.sh https://myhost.confluent.cloud MY_KEY MY_SECRET ":." 

echo "Schema Registry URL: $1"
echo "Subjects Prefix: $4"

SR_URL=$1
API_KEY=$2
API_SECRET=$3
PREFIX=$4

AUTH_TOKEN=`printf "${API_KEY}:${API_SECRET}" | base64`
echo "Schema Registry Authentication Token:  $AUTH_TOKEN"


curl -s --request GET --url "${SR_URL}/contexts" \
    --header "Authorization: Basic ${AUTH_TOKEN}" | jq '.[]' | sed 's/"//g' >contexts.txt

echo "Available contexts:"
cat contexts.txt

curl -s --request GET --url "${SR_URL}/subjects?subjectPrefix=$PREFIX" \
    --header "Authorization: Basic ${AUTH_TOKEN}" | jq '.[]' | sed 's/"//g' >subjects.txt

echo "Subjects to delete:"
cat subjects.txt

if [ ! -s "subjects.txt" ]; then
    echo "Nothing to delete..."
    exit 1
fi

read -p "Are you sure you want to continue? (y/n) " answer

if [[ $answer == "y" || $answer == "Y" ]]; then
    echo "Deleting..."
    # continue with your code here
    filename='subjects.txt'
    while read line; do
        # reading each line
        echo "Deleting subject: $line"
        curl --request DELETE -s --url "${SR_URL}/subjects/$line" --header "Authorization: Basic ${AUTH_TOKEN}"
        curl --request DELETE -s --url "${SR_URL}/subjects/$line?permanent=true" --header "Authorization: Basic ${AUTH_TOKEN}"
    done <$filename
else
    echo "Exiting..."
    exit 0
fi