Generate ics files correctly, incl. merged all.ics

tools/merge_cals.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+from glob import glob
+import icalendar
+import pytz
+
+cals=[]
+merged=icalendar.Calendar()
+merged.add('prodid', '-//CCCB Calendar Generator//berlin.ccc.de//')
+merged.add('version', '2.0') 
+
+for icsfilestr in glob("public/*/**/*.ics", recursive=True):
+	with open(icsfilestr, 'r') as icsfile:
+		print("Importing", icsfilestr)
+		cals.append(icalendar.Calendar.from_ical(icsfile.read()))
+
+for cal in cals:
+	for e in cal.subcomponents:
+		merged.add_component(e)
+
+outfile="static/all.ics"
+with open(outfile, 'wb') as f:
+	print(f"writing to {outfile}...")
+	f.write(merged.to_ical())
+