Register an Avro schema using command line

register-avro-schema.sh

#!/bin/bash
set -e
usage() {
    echo " Register Avro schema from a file in a Schema Registry"
    echo ""
    echo " Usage:"
    echo "     register-avro-schema.sh <Options>"
    echo ""
    echo " Options:"
    echo "     -r   the URL of the Schema Registry e.g. http://localhost:8081"
    echo "     -s   subject name"
    echo "     -f   path to the file that contains the Avro schema"
}
while getopts "r:s:f:" opt; do
  case ${opt} in
    r) SCHEMA_REGISTRY_URL=$OPTARG ;;
    s) SUBJECT=$OPTARG ;;
    f) FILE_PATH=$OPTARG ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      usage
      exit 1;
      ;;
  esac
done

if [[ -z ${SCHEMA_REGISTRY_URL} ]]; then
    echo "The URL of the schema registry is not provided"
    usage
    exit 1
fi
if [[ -z ${SUBJECT} ]]; then
    echo "The subject is not provided"
    usage
    exit 1
fi
if [[ -z ${FILE_PATH} ]]; then
    echo "The file path to Avro schema is not provided"
    usage
    exit 1
fi

SCHEMA='{"schema":"'$(cat ${FILE_PATH} | tr '\n' '\r' | sed  's/"/\\"/g' | sed 's/\s//g')'"}'
echo $SCHEMA > ./tmp.json
curl -X POST -H "Content-Type: application/vnd.schemaregistry.v1+json"  --data @./tmp.json ${SCHEMA_REGISTRY_URL}/subjects/${SUBJECT}/versions
rm -f ./tmp.json