#!/usr/bin/env bash
#
# Build images from the instructions in `ci/custom/Dockerfile.*` files.
#
# A local registry is started to published the new images.

set -euo pipefail

: "${REGISTRY_PORT:=5000}"

REGISTRY_URL=127.0.0.1:$REGISTRY_PORT

SELF=$(realpath "$(dirname "$0")")

run() {
    ( set -x ; "$@" )
}


# Move the current stdout to another file descriptor, and
# replace it with stderr.
#
# Thus, the output from the build commands will not be mixed
# with image references.
exec {OUTPUT}<&1-
exec 1>&2


# Launch a Docker registry if it is not ready.
if ! curl --silent --max-time 5 "$REGISTRY_URL"
then
    docker run --detach --publish 5000:5000 registry

    for n in {1..20}
    do
        sleep "$n"

        if curl --silent --max-time 5 "$REGISTRY_URL"
        then
            break
        fi
    done
fi

for dockerfile in "$SELF"/custom/Dockerfile.*
do
    id=$(sha256sum "$dockerfile" | head -c 12)
    reference=$REGISTRY_URL/$id.${dockerfile//*.}:latest
    run buildah build --layers=true --tag "$reference" --file "$dockerfile" "$SELF/custom"
    run buildah push --tls-verify=false "$reference"

    echo "$reference" >&$OUTPUT
done