First attempt

voc/git.py

@@ -0,0 +1,52 @@
+
+import argparse
+import json
+import os
+from git import Repo
+from voc.c3data import C3data
+from voc.event import Event
+from voc.schedule import Schedule, ScheduleEncoder
+from voc.tools import (
+    commit_changes_if_something_relevant_changed,
+    git,
+)
+
+def export_event_files(schedule: Schedule, options: argparse.Namespace, local = False):
+    # to get proper a state, we first have to remove all event files from the previous run
+    if not local or options.git:
+        git("rm events/*  >/dev/null")
+    os.makedirs('events', exist_ok=True)
+
+    # write separate file for each event, to get better git diffs
+    # TODO: use Event.export()
+    def export_event(event: Event):
+        origin_system = None
+        if isinstance(event, Event) and event.origin:
+            origin_system = event.origin.origin_system
+
+        with open("events/{}.json".format(event["guid"]), "w") as fp:
+            json.dump(
+                {
+                    **event,
+                    "room_id": schedule._room_ids.get(event["room"], None),
+                    "origin": origin_system or None,
+                },
+                fp,
+                indent=2,
+                cls=ScheduleEncoder,
+            )
+
+    schedule.foreach_event(export_event)
+
+
+def postprocessing(schedule: Schedule, options: argparse.Namespace, local = False, targets = []):
+    if not local or options.git:
+        commit_changes_if_something_relevant_changed(schedule)
+        # Attention: This method exits the script, if nothing relevant changed
+        # TODO: make this fact more obvious or refactor code
+
+    if not local and "c3data" in targets:
+        print("\n== Updating c3data via API…")
+
+        c3data = C3data(schedule)
+        c3data.process_changed_events(Repo('.'), options)