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Fix sunrise wait windows on DST change days

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daily_sunrise_video.sh and sunrise-audio-capture.sh added wall-clock
seconds-since-midnight to a midnight epoch, which is 3600s off on the two
days a year the clocks change. Resolve targets with date -d "today HH:MM:SS"
instead. sunrise.py now builds local midnight with tz.localize().

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013wi3ZRpfenCe2TRwT4JFMG
This commit is contained in:
Claude
2026-11-02 01:21:57 +00:00
parent e92f189a44
commit 63bbe5c2ab
3 changed files with 16 additions and 11 deletions
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daily_sunrise_video.sh
+8 -6
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@@ -65,14 +65,16 @@ if ! $TEST_MODE; then
start_sec=$((sunrise_sec - SUNRISE_PRE_MIN * 60))
end_sec=$((sunrise_sec + SUNRISE_POST_MIN * 60))
echo "Window: $((start_sec/3600)):$(printf '%02d' $(((start_sec%3600)/60))) → $((end_sec/3600)):$(printf '%02d' $(((end_sec%3600)/60)))"
midnight=$(date -d "today 00:00:00" +%s)
now_day_sec=$(( $(date +%s) - midnight ))
if [ "$now_day_sec" -lt "$end_sec" ]; then
wait_sec=$(( end_sec - now_day_sec + 30 ))
echo "Waiting ${wait_sec}s for capture window to finish (ends $(date -d "@$(( midnight + end_sec ))" '+%H:%M:%S'))..."
# Resolve wall-clock targets through `date -d` instead of adding seconds-since-
# midnight to a midnight epoch: on a DST day (23h/25h) the two differ by 3600s.
end_epoch=$(date -d "today $(printf '%02d:%02d:%02d' $((end_sec/3600)) $(((end_sec%3600)/60)) $((end_sec%60)))" +%s)
now_epoch=$(date +%s)
if [ "$now_epoch" -lt "$end_epoch" ]; then
wait_sec=$(( end_epoch - now_epoch + 30 ))
echo "Waiting ${wait_sec}s for capture window to finish (ends $(date -d "@$end_epoch" '+%H:%M:%S'))..."
sleep "$wait_sec"
else
echo "Capture window already closed at $(date -d "@$(( midnight + end_sec ))" '+%H:%M:%S') — processing available images"
echo "Capture window already closed at $(date -d "@$end_epoch" '+%H:%M:%S') — processing available images"
fi
fi