#!/bin/sh
set -eu

ROOT=$(CDPATH='' cd -- "$(dirname -- "$0")/.." && pwd)
artifact_dir=${1:-}
build_command=${2:-the matching Android build script}

if [ -z "$artifact_dir" ]; then
  echo "usage: $0 ARTIFACT_DIR [BUILD_COMMAND]" >&2
  exit 2
fi

case "$artifact_dir" in
  /*) ;;
  *) artifact_dir="$ROOT/$artifact_dir" ;;
esac

fingerprint_file="$artifact_dir/source-fingerprint.sha256"

if [ ! -s "$fingerprint_file" ]; then
  echo "Android artifacts do not record their source fingerprint: $fingerprint_file" >&2
  echo "Run $build_command before using these artifacts." >&2
  exit 1
fi

expected=$(tr -d '\r\n' <"$fingerprint_file")
actual=$("$ROOT/scripts/android-source-fingerprint.sh")

if ! printf '%s\n' "$expected" | grep -Eq '^[0-9a-f]{64}$'; then
  echo "Android artifact source fingerprint is malformed." >&2
  exit 1
fi

if [ "$expected" != "$actual" ]; then
  echo "Android artifacts are stale relative to the current Android source." >&2
  echo "Run $build_command before smoke or cross-client testing." >&2
  exit 1
fi

printf 'Verified Android artifact source fingerprint: %s\n' "$actual"