Fork of https://github.com/agraboso/merge_ics. Fixing two bugs and allowing to prepend the calendar / category to the summary of each event, making it easy to see where an event came from.

A simple Python script to merge RFC5545 calendar files. It accepts several input calendars (referred to as sources) and processes them into one or more output calendar (sinks).

$ pip install merge_ics

$ merge_ics <config_file>

merge_ics reads configuration from YAML files passed through the command line as above. These YAML files should contain two nodes:

• sources specifies the input calendars, and
• sinks describes the calendars that should be outputted by the script.

The sources node should contain a mapping whose keys are arbitrary identifiers for the input calendars. The values should again be mappings, with the possible keys being filename and url. The value for filename should describe a local ics file, while that for url should point to a remote one. The presence of both keys will result in merge_ics trying to read and parse the local copy, downloading the remote copy only in case of error.

The sinks node should contain a collection, each of which is a descriptor for an output calendar. These sink descriptors should contain three keys:

• filename: the filename where to write the calendar.
• sources: a mapping with keys being the arbitrary identifiers of the sources that you want to merge. The events from each of these source calendars will be given the corresponding values in a CATEGORIES prop.
• options: a mapping of calendar-level props. Make sure to always include version and prodid (otherwise the resulting ics file will be non-conformant).
• prepend_calendername: If True the name of the calendar / category will be prepended to the events summary. (Default False)

sources:
  1:
    filename: https://example.com/cal_local.ics
  online_cal:
    url: https://example.com/cal_online.ics
  2:
    filename: cal2.ics
    url: https://example.com/cal2.ics
sinks:
  -
    filename: output_cal1.ics
    sources:
      1: Local Events
    options:
      version: 2.0
      prodid: -//Owner//LocalEvents//EN
      x-wr-calname: Local Events
      x-wr-caldesc: Events from my local calendar
      calscale: GREGORIAN
      method: PUBLISH
      x-published-ttl: PT15M
  -
    filename: output_cal123.ics
    sources:
      1: Local Events
      online_cal: Online Events
      2: Another Category
    options:
      version: 2.0
      prodid: -//Owner//Merged//EN
      x-wr-calname: Merged Calendar
      x-wr-caldesc: All my events
      calscale: GREGORIAN
      method: PUBLISH
      x-published-ttl: PT15M
    prepend_calendername: False

MIT