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| 1 | +#!/usr/bin/env bash |
| 2 | +set -euo pipefail |
| 3 | + |
| 4 | +SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" |
| 5 | +PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)" |
| 6 | +BASELINE_DIR="${BASELINE_DIR:-${PROJECT_ROOT}/docs/developer-guide/img}" |
| 7 | +STORAGE_DIR="${CN1_STORAGE_DIR:-${HOME}/.cn1}" |
| 8 | +ARTIFACT_DIR="${1:-${PROJECT_ROOT}/docs/demos/animation-screenshot-artifacts}" |
| 9 | + |
| 10 | +if ! command -v compare >/dev/null 2>&1; then |
| 11 | + echo "ImageMagick 'compare' command is required." >&2 |
| 12 | + exit 2 |
| 13 | +fi |
| 14 | + |
| 15 | +mkdir -p "${ARTIFACT_DIR}" |
| 16 | +find "${ARTIFACT_DIR}" -mindepth 1 -delete |
| 17 | + |
| 18 | +if [[ ! -d "${STORAGE_DIR}" ]]; then |
| 19 | + echo "Storage directory ${STORAGE_DIR} does not exist; nothing to compare." |
| 20 | + exit 0 |
| 21 | +fi |
| 22 | + |
| 23 | +shopt -s nullglob |
| 24 | +mapfile -d '' SCREENSHOTS < <(find "${STORAGE_DIR}" -type f -name '*.png' -print0) |
| 25 | +shopt -u nullglob |
| 26 | + |
| 27 | +if [[ ${#SCREENSHOTS[@]} -eq 0 ]]; then |
| 28 | + echo "No screenshots found under ${STORAGE_DIR}; nothing to compare." |
| 29 | + exit 0 |
| 30 | +fi |
| 31 | + |
| 32 | +mismatch_count=0 |
| 33 | + |
| 34 | +for screenshot in "${SCREENSHOTS[@]}"; do |
| 35 | + filename="$(basename "${screenshot}")" |
| 36 | + base="${filename%.png}" |
| 37 | + |
| 38 | + baseline="" |
| 39 | + baseline_ext="" |
| 40 | + for ext in png PNG jpg JPG jpeg JPEG; do |
| 41 | + candidate="${BASELINE_DIR}/${base}.${ext}" |
| 42 | + if [[ -f "${candidate}" ]]; then |
| 43 | + baseline="${candidate}" |
| 44 | + baseline_ext="${ext}" |
| 45 | + break |
| 46 | + fi |
| 47 | + done |
| 48 | + |
| 49 | + if [[ -z "${baseline}" ]]; then |
| 50 | + echo "No baseline found for ${filename}; treating as mismatch." >&2 |
| 51 | + mismatch_count=$((mismatch_count + 1)) |
| 52 | + cp "${screenshot}" "${ARTIFACT_DIR}/${filename}" |
| 53 | + rm -f "${screenshot}" |
| 54 | + continue |
| 55 | + fi |
| 56 | + |
| 57 | + metric_file="$(mktemp)" |
| 58 | + diff_image="${ARTIFACT_DIR}/${base}.diff.png" |
| 59 | + |
| 60 | + set +e |
| 61 | + compare -metric AE "${screenshot}" "${baseline}" "${diff_image}" 2>"${metric_file}" |
| 62 | + status=$? |
| 63 | + set -e |
| 64 | + |
| 65 | + if [[ ${status} -eq 0 ]]; then |
| 66 | + rm -f "${screenshot}" "${diff_image}" "${metric_file}" |
| 67 | + echo "${filename} matches baseline; capture discarded." |
| 68 | + continue |
| 69 | + fi |
| 70 | + |
| 71 | + if [[ ${status} -ne 1 ]]; then |
| 72 | + cat "${metric_file}" >&2 |
| 73 | + rm -f "${metric_file}" "${diff_image}" |
| 74 | + echo "ImageMagick comparison failed for ${filename}." >&2 |
| 75 | + exit ${status} |
| 76 | + fi |
| 77 | + |
| 78 | + mismatch_count=$((mismatch_count + 1)) |
| 79 | + metric_value="$(cat "${metric_file}")" |
| 80 | + rm -f "${metric_file}" |
| 81 | + |
| 82 | + cp "${screenshot}" "${ARTIFACT_DIR}/${filename}" |
| 83 | + cp "${baseline}" "${ARTIFACT_DIR}/${base}.baseline.${baseline_ext}" |
| 84 | + echo "${metric_value}" > "${ARTIFACT_DIR}/${base}.metric.txt" |
| 85 | + rm -f "${screenshot}" |
| 86 | + echo "${filename} differs from baseline; artifacts stored in ${ARTIFACT_DIR}." >&2 |
| 87 | +done |
| 88 | + |
| 89 | +if [[ ${mismatch_count} -eq 0 ]]; then |
| 90 | + echo "All screenshots match their baselines." |
| 91 | + exit 0 |
| 92 | +fi |
| 93 | + |
| 94 | +echo "${mismatch_count} screenshot(s) differ from the documented baseline." >&2 |
| 95 | +exit 1 |
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