#!/usr/bin/env bash
# Where the buildpacks image's size goes, and why its JRE is bigger than Temurin's.
# -> docs/output/buildpacks-layers.txt
set -uo pipefail
source "$(dirname "$0")/env.sh"
W=$(mktemp -d)
{
  echo "# docker history sbd/docker-images:buildpacks"
  docker history --no-trunc --format '{{.Size}}\t{{.CreatedBy}}' sbd/docker-images:buildpacks | cut -c1-110
  echo
  cid=$(docker create sbd/docker-images:buildpacks); docker export "$cid" | tar -x -C "$W" layers/paketo-buildpacks_bellsoft-liberica/jre; docker rm "$cid" > /dev/null
  cid=$(docker create eclipse-temurin:25-jre); docker export "$cid" | tar -x -C "$W" opt/java/openjdk; docker rm "$cid" > /dev/null
  L="$W/layers/paketo-buildpacks_bellsoft-liberica/jre"; T="$W/opt/java/openjdk"
  echo "# The two JREs, in MB (du -sm)"
  printf '%-44s %6s\n' "BellSoft Liberica JRE (buildpacks) total" "$(du -sm "$L" | cut -f1)"
  printf '%-44s %6s\n' "  lib/server" "$(du -sm "$L/lib/server" | cut -f1)"
  printf '%-44s %6s\n' "  lib/client" "$(du -sm "$L/lib/client" | cut -f1)"
  printf '%-44s %6s\n' "Temurin JRE (eclipse-temurin:25-jre) total" "$(du -sm "$T" | cut -f1)"
  printf '%-44s %6s\n' "  lib/server" "$(du -sm "$T/lib/server" | cut -f1)"
  printf '%-44s %6s\n' "  lib/client" "$( [ -d "$T/lib/client" ] && du -sm "$T/lib/client" | cut -f1 || echo absent)"
} | tee "$OUT/buildpacks-layers.txt"
rm -rf "$W"