added aws_ecr_alternate_tags.sh

aws_ecr_alternate_tags.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+#  vim:ts=4:sts=4:sw=4:et
+#  args: haritest:1.0 stable
+#
+#  Author: Hari Sekhon
+#  Date: 2021-12-10 11:30:51 +0000 (Fri, 10 Dec 2021)
+#
+#  https://github.com/HariSekhon/bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  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
+#
+#  https://www.linkedin.com/in/HariSekhon
+#
+
+# https://docs.aws.amazon.com/AmazonECR/latest/userguide/image-retag.html
+
+set -euo pipefail
+[ -n "${DEBUG:-}" ] && set -x
+srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck disable=SC1090
+. "$srcdir/lib/aws.sh"
+
+# shellcheck disable=SC2034,SC2154
+usage_description="
+Lists all alternative tags for the given specific GCR docker image:tag
+
+If a container has multiple tags (eg. latest, v1, hashref), you can supply '<image>:latest' to see which version has been tagged to 'latest'
+
+Each tag for the given <image>:<tag> is output on a separate line for easy further piping and filtering, including the originally supplied tag
+
+If no tag is given, assumes 'latest'
+
+If the image isn't found in GCR, will return nothing and no error code since this is the default GCloud SDK behaviour
+
+$usage_aws_cli_required
+
+
+If you want to remove an extra tag from an existing image:
+
+    aws ecr batch-delete-image --repository-name <image> --image-ids \"imageTag=<tag>\"
+
+
+Similar scripts:
+
+    aws_ecr_*.sh - scripts for AWS Elastic Container Registry
+
+    gcr_*.sh - scripts for Google Container Registry
+"
+
+# used by usage() in lib/utils.sh
+# shellcheck disable=SC2034
+usage_args="<image>:<tag>"
+
+help_usage "$@"
+
+num_args 1 "$@"
+
+image_tag="$1"
+
+image="${image_tag%%:*}"
+tag="${image_tag##*:}"
+if [ -z "$tag" ] || [ "$tag" = "$image" ]; then
+    tag="latest"
+fi
+
+aws ecr describe-images --repository-name "$image" --image-ids "imageTag=$tag" |
+jq -r '.imageDetails[].imageTags[]' |
+sort