jq checksum example

Download jq command and verify the checksum using shasum.

• https://github.com/stedolan/jq

This documentation is a part of verify-checksum-cheatsheet.

Example

• Binary: https://github.com/stedolan/jq/releases/download/jq-1.6/jq-linux64
• Checksum: https://raw.githubusercontent.com/stedolan/jq/master/sig/v1.6/sha256sum.txt

#!/bin/bash
set -ex
# docs: https://github.com/pkgdeps/verify-checksum-cheatsheet
declare JQ_VERSION="1.6"
# Download binary and checksum
# → Download these ./jq-linux and ./jq.sha256sum
# Note: Preserve binary file name because shasum command read the file name like "jq-linux64"
curl -sLO https://github.com/stedolan/jq/releases/download/jq-${JQ_VERSION}/jq-linux64 && \
curl -sL https://raw.githubusercontent.com/stedolan/jq/master/sig/v${JQ_VERSION}/sha256sum.txt -o jq.sha256sum
# Verify the checksum
# → read jq-linux64 line from and pass to shasum command
# → If the checksum of jq-linux64 is not same to jq.sha256sum's value, show error and exit 1
grep -e "jq-linux64$" jq.sha256sum | shasum --check - || (echo "Error: Not match jq SHA256." && exit 1)
# Add permission for executable and Rename to "jq"
# → You can use "jq" command
chmod 755 jq-linux64 && ln -sfnv "$(pwd)/jq-linux64" "$(pwd)/jq"

Notes

macOS's shasum command does not support -q.

If you want to supress the output of shasum, you can use -q flag.

grep -E "jq-linux64$" jq.sha256sum | shasum -q -a 256 -c - || (echo "Error: Not match jq SHA256." && exit 1)

Test

./jq --version