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62 lines
1.6 KiB
Bash
62 lines
1.6 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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# args: localhost:5000 centos
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#
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# Author: Hari Sekhon
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# Date: 2020-09-30 12:05:41 +0100 (Wed, 30 Sep 2020)
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#
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# https://github.com/HariSekhon/bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Gets the docker manifest for a given image:tag from a Docker Registry via the Docker Registry API v2
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If :<tag> isn't given, assumes 'latest'
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See adjacent docker_api.sh for authentication details
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="http(s)://host:port <image>[:<tag>]"
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help_usage "$@"
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min_args 2 "$@"
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docker_registry_url="$1"
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image_tag="$2"
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shift || :
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shift || :
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if ! [[ "$docker_registry_url" =~ ^(https?://)?[[:alnum:].-]+:[[:digit:]]+/?$ ]]; then
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usage "invalid docker registry url: $docker_registry_url"
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fi
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if ! [[ "$docker_registry_url" =~ ^https?:// ]]; then
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docker_registry_url="http://$docker_registry_url"
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fi
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image="${image_tag%%:*}"
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tag="${image_tag##*:}"
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if ! [[ "$image_tag" =~ : ]] &&
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[ "$tag" = "$image" ]; then
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tag="latest"
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fi
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"$srcdir/docker_api.sh" "$docker_registry_url/v2/$image/manifests/$tag" -H "Accept: application/vnd.docker.distribution.manifest.v2+json"
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