# Shared setup for bin/ scripts. Source after `set -euo pipefail`.
#
# Expects IMAGE and DATE in the environment (the Makefile exports them) and
# takes the target arch as $1 where relevant.

: "${IMAGE:=git.eeqj.de/sneak/baseimage}"
: "${DATE:=$(date +%Y-%m-%d)}"

LOGDIR="logs/$DATE"
mkdir -p "$LOGDIR"

# Point docker at the daemon for the given arch. DOCKER_HOST_<arch> empty or
# unset means the local daemon.
use_arch_host() {
    local arch="$1" var host
    var="DOCKER_HOST_${arch}"
    host="${!var:-}"
    if [ -n "$host" ]; then
        export DOCKER_HOST="$host"
    else
        unset DOCKER_HOST
    fi
    local actual
    actual="$(docker version --format '{{.Server.Arch}}')"
    if [ "$actual" != "$arch" ]; then
        echo "error: daemon for $arch (${host:-local}) reports arch $actual" >&2
        return 1
    fi
}

dev_tag() { echo "baseimage:dev-$1"; }
arch_tag() { echo "$IMAGE:$1"; }