feat: dynamic scheduling based on astronomical darkness #1
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| name: "Update Sun Schedule" | ||
| on: | ||
| schedule: | ||
| # Run once daily at 02:00 UTC (3 AM Oslo time in winter) | ||
| - cron: "0 2 * * *" | ||
| workflow_dispatch: # Manual trigger for testing | ||
| jobs: | ||
| update-schedule: | ||
| runs-on: ubuntu-latest | ||
| timeout-minutes: 5 | ||
| steps: | ||
| - name: Checkout repository | ||
| uses: actions/checkout@v4 | ||
| with: | ||
| token: ${{ secrets.GITHUB_TOKEN }} | ||
| - name: Set up Python 3.11 | ||
| uses: actions/setup-python@v4 | ||
| with: | ||
| python-version: '3.11' | ||
| - name: Fetch sun times and update schedule | ||
| run: | | ||
| python3 << 'EOF' | ||
| import json | ||
| import requests | ||
| from datetime import datetime, time | ||
| # Fetch sun times | ||
| LAT = 59.95 | ||
| LNG = 10.466667 | ||
| url = f"https://api.sunrise-sunset.org/json?lat={LAT}&lng={LNG}&formatted=0" | ||
| response = requests.get(url, timeout=15) | ||
| response.raise_for_status() | ||
| data = response.json() | ||
| if data.get("status") != "OK": | ||
| raise Exception(f"API returned status: {data.get('status')}") | ||
| results = data["results"] | ||
| # Parse times (ISO format from API when formatted=0) | ||
| def parse_time(time_str): | ||
| """Extract hour and minute from ISO datetime string""" | ||
| dt = datetime.fromisoformat(time_str.replace('Z', '+00:00')) | ||
| return dt.hour, dt.minute | ||
| # Get astronomical twilight times (darkest) | ||
| twilight_end_h, twilight_end_m = parse_time(results["astronomical_twilight_end"]) | ||
| twilight_begin_h, twilight_begin_m = parse_time(results["astronomical_twilight_begin"]) | ||
| # Generate cron schedule for dark hours | ||
| # Run every 30 minutes during astronomical darkness | ||
| # Cron format: minute hour * * * | ||
| # If twilight_end is 17:44:59 (5:44 PM), start at 18:00 | ||
| # If twilight_begin is 4:18:25 AM, end at 4:00 AM | ||
| start_hour = twilight_end_h + 1 if twilight_end_m > 30 else twilight_end_h | ||
| end_hour = twilight_begin_h | ||
| # Handle case where darkness spans midnight | ||
| if start_hour >= end_hour: | ||
| # Example: 18:00-23:59 and 00:00-04:00 | ||
| cron_evening = f"*/30 {start_hour}-23 * * *" | ||
| cron_morning = f"*/30 0-{end_hour} * * *" if end_hour > 0 else None | ||
| cron_schedule = [cron_evening] | ||
| if cron_morning: | ||
| cron_schedule.append(cron_morning) | ||
| else: | ||
| # Continuous dark period (rare in Lommedalen) | ||
| cron_schedule = [f"*/30 {start_hour}-{end_hour} * * *"] | ||
| # Save schedule info | ||
| schedule_info = { | ||
| "updated_at": datetime.utcnow().isoformat() + "Z", | ||
| "location": {"lat": LAT, "lng": LNG}, | ||
| "sun_times": results, | ||
| "dark_hours": { | ||
| "start_hour": start_hour, | ||
| "end_hour": end_hour, | ||
| "spans_midnight": start_hour >= end_hour | ||
| }, | ||
| "cron_schedules": cron_schedule | ||
| } | ||
| with open('sun_schedule.json', 'w') as f: | ||
| json.dump(schedule_info, f, indent=2) | ||
| print(f"✅ Updated sun schedule") | ||
| print(f" Astronomical darkness: {start_hour}:00 - {end_hour}:00 UTC") | ||
| print(f" Cron schedules: {', '.join(cron_schedule)}") | ||
| EOF | ||
| - name: Update workflow schedule | ||
| run: | | ||
| python3 << 'EOF' | ||
| import json | ||
| import yaml | ||
| # Load schedule info | ||
| with open('sun_schedule.json', 'r') as f: | ||
| schedule_info = json.load(f) | ||
| # Load current workflow | ||
| with open('.github/workflows/post.yml', 'r') as f: | ||
| workflow = yaml.safe_load(f) | ||
| # Update cron schedules | ||
| cron_schedules = schedule_info['cron_schedules'] | ||
| workflow['on']['schedule'] = [{'cron': cron} for cron in cron_schedules] | ||
| # Save updated workflow | ||
| with open('.github/workflows/post.yml', 'w') as f: | ||
| yaml.dump(workflow, f, default_flow_style=False, sort_keys=False) | ||
| print(f"✅ Updated post.yml with {len(cron_schedules)} cron schedule(s)") | ||
| EOF | ||
| - name: Commit and push changes | ||
| run: | | ||
| git config user.name "github-actions[bot]" | ||
| git config user.email "github-actions[bot]@users.noreply.github.com" | ||
| git add sun_schedule.json .github/workflows/post.yml | ||
| if git diff --staged --quiet; then | ||
| echo "No changes to commit" | ||
| else | ||
| git commit -m "chore: update sun schedule and workflow timing [automated] | ||
| Dark hours: $(jq -r '.dark_hours.start_hour' sun_schedule.json):00 - $(jq -r '.dark_hours.end_hour' sun_schedule.json):00 UTC | ||
| Updated: $(jq -r '.updated_at' sun_schedule.json)" | ||
| git push | ||
| fi | ||
