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6 <title>Petter Reinholdtsen: entries from January 2017</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 <h3>Entries from January 2017.</h3>
23
24 <div class="entry">
25 <div class="title">
26 <a href="http://people.skolelinux.org/pere/blog/Introducing_ical_archiver_to_split_out_old_iCalendar_entries.html">Introducing ical-archiver to split out old iCalendar entries</a>
27 </div>
28 <div class="date">
29 4th January 2017
30 </div>
31 <div class="body">
32 <p>Do you have a large <a href="https://icalendar.org/">iCalendar</a>
33 file with lots of old entries, and would like to archive them to save
34 space and resources? At least those of us using KOrganizer know that
35 turning on and off an event set become slower and slower the more
36 entries are in the set. While working on migrating our calendars to a
37 <a href="http://radicale.org/">Radicale CalDAV server</a> on our
38 <a href="https://freedomboxfoundation.org/">Freedombox server</a/>, my
39 loved one wondered if I could find a way to split up the calendar file
40 she had in KOrganizer, and I set out to write a tool. I spent a few
41 days writing and polishing the system, and it is now ready for general
42 consumption. The
43 <a href="https://github.com/petterreinholdtsen/ical-archiver">code for
44 ical-archiver</a> is publicly available from a git repository on
45 github. The system is written in Python and depend on
46 <a href="http://eventable.github.io/vobject/">the vobject Python
47 module</a>.</p>
48
49 <p>To use it, locate the iCalendar file you want to operate on and
50 give it as an argument to the ical-archiver script. This will
51 generate a set of new files, one file per component type per year for
52 all components expiring more than two years in the past. The vevent,
53 vtodo and vjournal entries are handled by the script. The remaining
54 entries are stored in a 'remaining' file.</p>
55
56 <p>This is what a test run can look like:
57
58 <p><pre>
59 % ical-archiver t/2004-2016.ics
60 Found 3612 vevents
61 Found 6 vtodos
62 Found 2 vjournals
63 Writing t/2004-2016.ics-subset-vevent-2004.ics
64 Writing t/2004-2016.ics-subset-vevent-2005.ics
65 Writing t/2004-2016.ics-subset-vevent-2006.ics
66 Writing t/2004-2016.ics-subset-vevent-2007.ics
67 Writing t/2004-2016.ics-subset-vevent-2008.ics
68 Writing t/2004-2016.ics-subset-vevent-2009.ics
69 Writing t/2004-2016.ics-subset-vevent-2010.ics
70 Writing t/2004-2016.ics-subset-vevent-2011.ics
71 Writing t/2004-2016.ics-subset-vevent-2012.ics
72 Writing t/2004-2016.ics-subset-vevent-2013.ics
73 Writing t/2004-2016.ics-subset-vevent-2014.ics
74 Writing t/2004-2016.ics-subset-vjournal-2007.ics
75 Writing t/2004-2016.ics-subset-vjournal-2011.ics
76 Writing t/2004-2016.ics-subset-vtodo-2012.ics
77 Writing t/2004-2016.ics-remaining.ics
78 %
79 </pre></p>
80
81 <p>As you can see, the original file is untouched and new files are
82 written with names derived from the original file. If you are happy
83 with their content, the *-remaining.ics file can replace the original
84 the the others can be archived or imported as historical calendar
85 collections.</p>
86
87 <p>The script should probably be improved a bit. The error handling
88 when discovering broken entries is not good, and I am not sure yet if
89 it make sense to split different entry types into separate files or
90 not. The program is thus likely to change. If you find it
91 interesting, please get in touch. :)</p>
92
93 <p>As usual, if you use Bitcoin and want to show your support of my
94 activities, please send Bitcoin donations to my address
95 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&label=PetterReinholdtsenBlog">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
96
97 </div>
98 <div class="tags">
99
100
101 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>.
102
103
104 </div>
105 </div>
106 <div class="padding"></div>
107
108 <p style="text-align: right;"><a href="01.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
109 <div id="sidebar">
110
111
112
113 <h2>Archive</h2>
114 <ul>
115
116 <li>2017
117 <ul>
118
119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (1)</a></li>
120
121 </ul></li>
122
123 <li>2016
124 <ul>
125
126 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
127
128 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
129
130 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
131
132 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
133
134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
135
136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
137
138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
139
140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
141
142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
143
144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
145
146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
147
148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
149
150 </ul></li>
151
152 <li>2015
153 <ul>
154
155 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
156
157 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
158
159 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
160
161 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
162
163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
164
165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
166
167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
168
169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
170
171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
172
173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
174
175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
176
177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
178
179 </ul></li>
180
181 <li>2014
182 <ul>
183
184 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
185
186 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
187
188 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
189
190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
191
192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
193
194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
195
196 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
197
198 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
199
200 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
201
202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
203
204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
205
206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
207
208 </ul></li>
209
210 <li>2013
211 <ul>
212
213 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
214
215 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
216
217 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
218
219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
220
221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
222
223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
224
225 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
226
227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
228
229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
230
231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
232
233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
234
235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
236
237 </ul></li>
238
239 <li>2012
240 <ul>
241
242 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
243
244 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
245
246 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
247
248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
249
250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
251
252 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
253
254 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
255
256 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
257
258 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
259
260 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
261
262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
263
264 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
265
266 </ul></li>
267
268 <li>2011
269 <ul>
270
271 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
272
273 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
274
275 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
276
277 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
278
279 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
280
281 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
282
283 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
284
285 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
286
287 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
288
289 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
290
291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
292
293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
294
295 </ul></li>
296
297 <li>2010
298 <ul>
299
300 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
301
302 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
303
304 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
305
306 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
307
308 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
309
310 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
311
312 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
313
314 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
315
316 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
317
318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
319
320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
321
322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
323
324 </ul></li>
325
326 <li>2009
327 <ul>
328
329 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
330
331 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
332
333 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
334
335 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
336
337 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
338
339 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
340
341 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
342
343 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
344
345 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
346
347 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
348
349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
350
351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
352
353 </ul></li>
354
355 <li>2008
356 <ul>
357
358 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
359
360 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
361
362 </ul></li>
363
364 </ul>
365
366
367
368 <h2>Tags</h2>
369 <ul>
370
371 <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
372
373 <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
374
375 <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
376
377 <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
378
379 <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
380
381 <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
382
383 <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
384
385 <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
386
387 <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (144)</a></li>
388
389 <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
390
391 <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
392
393 <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (16)</a></li>
394
395 <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (23)</a></li>
396
397 <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
398
399 <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (337)</a></li>
400
401 <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
402
403 <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
404
405 <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (29)</a></li>
406
407 <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
408
409 <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
410
411 <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
412
413 <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
414
415 <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
416
417 <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (19)</a></li>
418
419 <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
420
421 <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
422
423 <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
424
425 <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
426
427 <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
428
429 <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
430
431 <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
432
433 <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (285)</a></li>
434
435 <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (182)</a></li>
436
437 <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (26)</a></li>
438
439 <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
440
441 <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (62)</a></li>
442
443 <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (96)</a></li>
444
445 <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
446
447 <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
448
449 <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
450
451 <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
452
453 <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
454
455 <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
456
457 <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
458
459 <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
460
461 <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (52)</a></li>
462
463 <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
464
465 <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
466
467 <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (50)</a></li>
468
469 <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (5)</a></li>
470
471 <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (10)</a></li>
472
473 <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (44)</a></li>
474
475 <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (2)</a></li>
476
477 <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
478
479 <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
480
481 <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
482
483 <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
484
485 <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (38)</a></li>
486
487 </ul>
488
489
490 </div>
491 <p style="text-align: right">
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