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6 <title>Petter Reinholdtsen: Introducing ical-archiver to split out old iCalendar entries</title>
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14 <h1>
15 <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
16
17 </h1>
18
19 </div>
20
21
22 <div class="entry">
23 <div class="title">Introducing ical-archiver to split out old iCalendar entries</div>
24 <div class="date"> 4th January 2017</div>
25 <div class="body"><p>Do you have a large <a href="https://icalendar.org/">iCalendar</a>
26 file with lots of old entries, and would like to archive them to save
27 space and resources? At least those of us using KOrganizer know that
28 turning on and off an event set become slower and slower the more
29 entries are in the set. While working on migrating our calendars to a
30 <a href="http://radicale.org/">Radicale CalDAV server</a> on our
31 <a href="https://freedomboxfoundation.org/">Freedombox server</a/>, my
32 loved one wondered if I could find a way to split up the calendar file
33 she had in KOrganizer, and I set out to write a tool. I spent a few
34 days writing and polishing the system, and it is now ready for general
35 consumption. The
36 <a href="https://github.com/petterreinholdtsen/ical-archiver">code for
37 ical-archiver</a> is publicly available from a git repository on
38 github. The system is written in Python and depend on the vobject
39 Python module.</p>
40
41 <p>To use it, locate the iCalendar file you want to operate on and
42 give it as an argument to the ical-archiver script. This will
43 generate a set of new files, one file per component type per year for
44 all components expiring more than two years in the past. The vevent,
45 vtodo and vjournal entries are handled by the script. The remaining
46 entries are stored in a 'remaining' file.</p>
47
48 <p>This is what a test run can look like:
49
50 <p><pre>
51 % ical-archiver t/2004-2016.ics
52 Found 3612 vevents
53 Found 6 vtodos
54 Found 2 vjournals
55 Writing t/2004-2016.ics-subset-vevent-2004.ics
56 Writing t/2004-2016.ics-subset-vevent-2005.ics
57 Writing t/2004-2016.ics-subset-vevent-2006.ics
58 Writing t/2004-2016.ics-subset-vevent-2007.ics
59 Writing t/2004-2016.ics-subset-vevent-2008.ics
60 Writing t/2004-2016.ics-subset-vevent-2009.ics
61 Writing t/2004-2016.ics-subset-vevent-2010.ics
62 Writing t/2004-2016.ics-subset-vevent-2011.ics
63 Writing t/2004-2016.ics-subset-vevent-2012.ics
64 Writing t/2004-2016.ics-subset-vevent-2013.ics
65 Writing t/2004-2016.ics-subset-vevent-2014.ics
66 Writing t/2004-2016.ics-subset-vjournal-2007.ics
67 Writing t/2004-2016.ics-subset-vjournal-2011.ics
68 Writing t/2004-2016.ics-subset-vtodo-2012.ics
69 Writing t/2004-2016.ics-remaining.ics
70 %
71 </pre></p>
72
73 <p>As you can see, the original file is untouched and new files are
74 written with names derived from the original file. If you are happy
75 with their content, the *-remaining.ics file can replace the original
76 the the others can be archived or imported as historical calendar
77 collections.</p>
78
79 <p>The script should probably be improved a bit. The error handling
80 when discovering broken entries is not good, and I am not sure yet if
81 it make sense to split different entry types into separate files or
82 not. The program is thus likely to change. If you find it
83 interesting, please get in touch. :)</p>
84
85 <p>As usual, if you use Bitcoin and want to show your support of my
86 activities, please send Bitcoin donations to my address
87 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&label=PetterReinholdtsenBlog">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
88 </div>
89
90 <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/standard">standard</a>.</div>
91
92
93 </div>
94
95
96
97
98 <div id="sidebar">
99
100
101
102 <h2>Archive</h2>
103 <ul>
104
105 <li>2017
106 <ul>
107
108 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (1)</a></li>
109
110 </ul></li>
111
112 <li>2016
113 <ul>
114
115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
116
117 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
118
119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
120
121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
122
123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
124
125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
126
127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
128
129 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
130
131 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
132
133 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
134
135 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
136
137 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
138
139 </ul></li>
140
141 <li>2015
142 <ul>
143
144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
145
146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
147
148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
149
150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
151
152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
153
154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
155
156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
157
158 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
159
160 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
161
162 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
163
164 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
165
166 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
167
168 </ul></li>
169
170 <li>2014
171 <ul>
172
173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
174
175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
176
177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
178
179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
180
181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
182
183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
184
185 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
186
187 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
188
189 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
190
191 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
192
193 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
194
195 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
196
197 </ul></li>
198
199 <li>2013
200 <ul>
201
202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
203
204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
205
206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
207
208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
209
210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
211
212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
213
214 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
215
216 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
217
218 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
219
220 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
221
222 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
223
224 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
225
226 </ul></li>
227
228 <li>2012
229 <ul>
230
231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
232
233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
234
235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
236
237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
238
239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
240
241 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
242
243 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
244
245 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
246
247 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
248
249 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
250
251 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
252
253 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
254
255 </ul></li>
256
257 <li>2011
258 <ul>
259
260 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
261
262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
263
264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
265
266 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
267
268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
269
270 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
271
272 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
273
274 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
275
276 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
277
278 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
279
280 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
281
282 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
283
284 </ul></li>
285
286 <li>2010
287 <ul>
288
289 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
290
291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
292
293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
294
295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
296
297 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
298
299 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
300
301 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
302
303 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
304
305 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
306
307 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
308
309 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
310
311 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
312
313 </ul></li>
314
315 <li>2009
316 <ul>
317
318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
319
320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
321
322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
323
324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
325
326 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
327
328 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
329
330 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
331
332 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
333
334 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
335
336 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
337
338 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
339
340 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
341
342 </ul></li>
343
344 <li>2008
345 <ul>
346
347 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
348
349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
350
351 </ul></li>
352
353 </ul>
354
355
356
357 <h2>Tags</h2>
358 <ul>
359
360 <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
361
362 <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
363
364 <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
365
366 <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
367
368 <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
369
370 <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
371
372 <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
373
374 <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
375
376 <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (144)</a></li>
377
378 <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
379
380 <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
381
382 <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (16)</a></li>
383
384 <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (23)</a></li>
385
386 <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
387
388 <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (337)</a></li>
389
390 <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
391
392 <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
393
394 <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (29)</a></li>
395
396 <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
397
398 <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
399
400 <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
401
402 <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
403
404 <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
405
406 <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (19)</a></li>
407
408 <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
409
410 <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
411
412 <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
413
414 <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
415
416 <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
417
418 <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
419
420 <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
421
422 <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (285)</a></li>
423
424 <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (182)</a></li>
425
426 <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (26)</a></li>
427
428 <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
429
430 <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (62)</a></li>
431
432 <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (96)</a></li>
433
434 <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
435
436 <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
437
438 <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
439
440 <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
441
442 <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
443
444 <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
445
446 <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
447
448 <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
449
450 <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (52)</a></li>
451
452 <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
453
454 <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
455
456 <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (50)</a></li>
457
458 <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (5)</a></li>
459
460 <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (10)</a></li>
461
462 <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (44)</a></li>
463
464 <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (2)</a></li>
465
466 <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
467
468 <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
469
470 <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
471
472 <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
473
474 <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (38)</a></li>
475
476 </ul>
477
478
479 </div>
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