Verify pulsar-client-go release

pulsar-client-go-release-verify.sh

#!/bin/bash
set -e
cd `dirname $0`

VERSION=0.15.1
RC_SUFFIX="-candidate-1"
BASE_URL=https://dist.apache.org/repos/dist/dev/pulsar/pulsar-client-go-$VERSION$RC_SUFFIX
FILENAME=apache-pulsar-client-go-$VERSION-src.tar.gz

if [[ ! -f $FILENAME ]]; then
    curl -O -L $BASE_URL/$FILENAME
fi
if [[ ! -f $FILENAME.asc ]]; then
    curl -O -L $BASE_URL/$FILENAME.asc
fi
if [[ ! -f $FILENAME.sha512 ]]; then
    curl -O -L $BASE_URL/$FILENAME.sha512
fi
if [[ ! -f v$VERSION$RC_SUFFIX.tar.gz ]]; then
    curl -O -L https://github.com/apache/pulsar-client-go/archive/refs/tags/v$VERSION$RC_SUFFIX.tar.gz
fi

gpg --verify $FILENAME.asc
EXPECTED_SHA512=$(shasum -a 512 $FILENAME | awk '{print $1}')
ACTUAL_SHA512=$(cat $FILENAME.sha512 | awk '{print $1}')
if [[ $EXPECTED_SHA512 != $ACTUAL_SHA512 ]]; then
    echo "SHA512 checksum does not match!"
    echo "Expected: $EXPECTED_SHA512"
    echo "Actual:   $ACTUAL_SHA512"
    exit 1
fi

DIR1=source
mkdir $DIR1
cd $DIR1
tar zxf ../$FILENAME
cd ..
tar zxf v$VERSION$RC_SUFFIX.tar.gz

DIR2=pulsar-client-go-$VERSION$RC_SUFFIX

diff --brief --recursive $DIR1 $DIR2