kpush

#!/usr/bin/env bash
set -euo pipefail

# Push an image to a remote k8s node
# Usage: kpush [-q] [-r host] [-T tarball] <image:tag>
# Examples:
#   kpush myapp:1.0                      Push to host from kubectl context
#   kpush -r bigfish myapp:1.0           Push to specific host
#   kpush -T image.tar myapp:1.0         Push from tarball instead of docker save
#   kpush -q myapp:1.0                   Quiet mode

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
readonly SCRIPT_DIR
source "$SCRIPT_DIR/lib.sh"

usage() {
  sed -n '4,9p' "$0"
  exit 0
}

quiet=false
host=""
tarball=""
while [[ $# -gt 0 && "$1" == -* ]]; do
  case "$1" in
    -h|--help) usage ;;
    -q|--quiet) quiet=true; shift ;;
    -r|--remote) require_optarg "$1" "${2:-}"; host="$2"; shift 2 ;;
    -T|--tarball) require_optarg "$1" "${2:-}"; tarball="$2"; shift 2 ;;
    *) echo "Unknown option: $1" >&2; exit 1 ;;
  esac
done

readonly IMAGE="${1:?Usage: kpush [-q] [-r host] [-T tarball] <image:tag>}"

[[ -z "$host" ]] && host=$(resolve_host)
require_host "$host" || exit 1

ctr_cmd=$(ctr_import_cmd)

if [[ -n "$tarball" && ! -f "$tarball" ]]; then
  echo "error: tarball not found: $tarball" >&2
  exit 1
fi

$quiet || echo -n "    Pushing image..." >&2

if [[ -n "$tarball" ]]; then
  remote_exec "$host" "$ctr_cmd - >/dev/null 2>&1" < "$tarball"
else
  docker save "$IMAGE" | remote_exec "$host" "$ctr_cmd - >/dev/null 2>&1" \
    || { echo "error: failed to save or push image '$IMAGE'" >&2; exit 1; }
fi

$quiet || echo " done" >&2