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#!/usr/bin/env bash |
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set -o errexit |
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set -o pipefail |
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set -o nounset |
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# set -o xtrace |
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__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" |
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__file="${__dir}/$(basename "${BASH_SOURCE[0]}")" |
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__base="$(basename ${__file} .sh)" |
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show_help() { |
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echo |
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echo "Usage: ${__base} [OPTIONS] IMAGE" |
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echo |
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echo "Retrieve a list of tags from dockerhub" |
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echo |
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echo "Options:" |
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echo " -r, --repository string Name of a repository, default: library" |
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echo " -a, --architecture string Filter on a specific architecture (e.g.: amd64), this can be a regex expression, default: all architectures" |
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echo " -o, --os string Filter on a specific operating system (e.g.: linux), this can be a regex expression, default: linux" |
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echo " -l, --limit integer Limit the number of results, this number is counted in hundreds (e.g.: a limit of 1 will return a maximum of 100 results), default to 10" |
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echo " -c, --cache integer Cache curl result, default no caching" |
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echo |
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echo "Example: ${__base} -l1 -a amd64 alpine" |
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echo |
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echo "Inspired by https://gist.github.com/bric3" |
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echo "Adapted by https://gist.github.com/adrienaury" |
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} |
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CMD_SHORT_OPTS="r:a:o:l:c:h" |
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CMD_LONG_OPTS="repository:,architecture:,os:,limit:,cache:,help" |
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! PARSED=$(getopt --options="${CMD_SHORT_OPTS}" --longoptions="${CMD_LONG_OPTS}" --name "$0" -- "$@") |
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if [[ ${PIPESTATUS[0]} -ne 0 ]]; then |
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# e.g. return value is 1 |
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# then getopt has complained about wrong arguments to stdout |
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show_help |
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exit 2 |
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fi |
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# read getopt’s output this way to handle the quoting right: |
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eval set -- "$PARSED" |
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# defaults |
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REPOSITORY=library |
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ARCH=".*" # all architectures |
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OS=linux |
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MAX_PAGES=10 |
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CACHE=0 |
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while true; do |
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case "$1" in |
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h|--help) |
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show_help |
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exit 0 |
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;; |
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-r|--repository) |
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REPOSITORY="$2" |
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shift 2 |
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;; |
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-a|--architecture) |
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ARCH="$2" |
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shift 2 |
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;; |
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-o|--os) |
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OS="$2" |
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shift 2 |
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;; |
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-l|--limit) |
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MAX_PAGES="$2" |
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shift 2 |
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;; |
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-c|--cache) |
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CACHE="$2" |
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shift 2 |
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;; |
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--) |
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# start of positionnal params |
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shift |
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break |
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;; |
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*) |
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echo "program error" |
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exit 3 |
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;; |
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esac |
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done |
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[ $# -eq 0 ] && show_help && exit 0 |
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IMAGE=$1 |
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( |
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url="https://registry.hub.docker.com/v2/repositories/${REPOSITORY}/${IMAGE}/tags/?page_size=100" |
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counter=1 |
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while [ $counter -le ${MAX_PAGES} ] && [ -n "${url}" ]; do |
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if [ ${CACHE} -eq 0 ]; then |
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content=$(curl --silent "${url}") |
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else |
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content=$(cache -e ${CACHE} -- curl --silent "${url}") |
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fi |
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((counter++)) |
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url=$(jq -r '.next // empty' <<< "${content}") |
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echo -n "${content}" |
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done |
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) | jq -s '[.[].results[]]' \ |
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| jq 'map({tag: .name, date: .last_updated, image: .images[] | select(.architecture|match("'${ARCH}'")) | select(.os|match("'${OS}'"))}) | map({tag: .tag, date: .date, os: .image.os, architecture: .image.architecture, digest: .image.digest}) | unique | sort_by(.tag)' \ |
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| jq -c '.[]'; |
