coder/scripts/image_tag.sh

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#!/usr/bin/env bash
# This script prints the image tag to use for the given arch and version
# combination.
#
# Usage: ./image_tag.sh [--arch amd64] [--version 1.2.3]
#
# The --arch parameter accepts a Golang arch specification. If not specified,
# the image tag for the multi-arch image will be returned instead.
#
# If no version is specified, defaults to the version from ./version.sh. If the
# supplied version is "latest", no `v` prefix will be added to the tag.
#
# The returned tag will be sanitized to remove invalid characters like the plus
# sign.
set -euo pipefail
# shellcheck source=scripts/lib.sh
source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
arch=""
version=""
args="$(getopt -o "" -l arch:,version: -- "$@")"
eval set -- "$args"
while true; do
case "$1" in
--arch)
arch="$2"
shift 2
;;
--version)
version="$2"
shift 2
;;
--)
shift
break
;;
*)
error "Unrecognized option: $1"
;;
esac
done
# Remove the "v" prefix because we don't want to add it twice.
version="${version#v}"
if [[ "$version" == "" ]]; then
version="$(execrelative ./version.sh)"
fi
image="${CODER_IMAGE_BASE:-ghcr.io/coder/coder}"
# use CODER_IMAGE_TAG_PREFIX if set as a prefix for the tag
tag_prefix="${CODER_IMAGE_TAG_PREFIX:-}"
tag="${tag_prefix:+$tag_prefix-}v$version"
if [[ "$version" == "latest" ]]; then
tag="latest"
fi
if [[ "$arch" != "" ]]; then
tag+="-$arch"
fi
# Dev versions contain plus signs which are illegal characters in Docker tags.
tag="${tag//+/-}"
echo "$image:$tag"