blog/Introducing_ical_archiver_to_split_out_old_iCalendar_entries.html

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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
  39 <a href="http://eventable.github.io/vobject/">the vobject Python
  40 module</a>.</p>
  41
  42 <p>To use it, locate the iCalendar file you want to operate on and
  43 give it as an argument to the ical-archiver script.  This will
  44 generate a set of new files, one file per component type per year for
  45 all components expiring more than two years in the past.  The vevent,
  46 vtodo and vjournal entries are handled by the script.  The remaining
  47 entries are stored in a 'remaining' file.</p>
  48
  49 <p>This is what a test run can look like:
  50
  51 <p><pre>
  52 % ical-archiver t/2004-2016.ics
  53 Found 3612 vevents
  54 Found 6 vtodos
  55 Found 2 vjournals
  56 Writing t/2004-2016.ics-subset-vevent-2004.ics
  57 Writing t/2004-2016.ics-subset-vevent-2005.ics
  58 Writing t/2004-2016.ics-subset-vevent-2006.ics
  59 Writing t/2004-2016.ics-subset-vevent-2007.ics
  60 Writing t/2004-2016.ics-subset-vevent-2008.ics
  61 Writing t/2004-2016.ics-subset-vevent-2009.ics
  62 Writing t/2004-2016.ics-subset-vevent-2010.ics
  63 Writing t/2004-2016.ics-subset-vevent-2011.ics
  64 Writing t/2004-2016.ics-subset-vevent-2012.ics
  65 Writing t/2004-2016.ics-subset-vevent-2013.ics
  66 Writing t/2004-2016.ics-subset-vevent-2014.ics
  67 Writing t/2004-2016.ics-subset-vjournal-2007.ics
  68 Writing t/2004-2016.ics-subset-vjournal-2011.ics
  69 Writing t/2004-2016.ics-subset-vtodo-2012.ics
  70 Writing t/2004-2016.ics-remaining.ics
  71 %
  72 </pre></p>
  73
  74 <p>As you can see, the original file is untouched and new files are
  75 written with names derived from the original file.  If you are happy
  76 with their content, the *-remaining.ics file can replace the original
  77 the the others can be archived or imported as historical calendar
  78 collections.</p>
  79
  80 <p>The script should probably be improved a bit.  The error handling
  81 when discovering broken entries is not good, and I am not sure yet if
  82 it make sense to split different entry types into separate files or
  83 not.  The program is thus likely to change.  If you find it
  84 interesting, please get in touch. :)</p>
  85
  86 <p>As usual, if you use Bitcoin and want to show your support of my
  87 activities, please send Bitcoin donations to my address
  88 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
  89 </div>
  90
  91       <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>
  92
  93
  94     </div>
  95
  96
  97
  98
  99     <div id="sidebar">
 100
 101
 102
 103 <h2>Archive</h2>
 104 <ul>
 105
 106 <li>2020
 107 <ul>
 108
 109 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/02/">February (2)</a></li>
 110
 111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/03/">March (2)</a></li>
 112
 113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/04/">April (2)</a></li>
 114
 115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2020/05/">May (2)</a></li>
 116
 117 </ul></li>
 118
 119 <li>2019
 120 <ul>
 121
 122 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/01/">January (4)</a></li>
 123
 124 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/02/">February (3)</a></li>
 125
 126 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/03/">March (3)</a></li>
 127
 128 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/05/">May (2)</a></li>
 129
 130 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/06/">June (5)</a></li>
 131
 132 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/07/">July (2)</a></li>
 133
 134 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/08/">August (1)</a></li>
 135
 136 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/09/">September (1)</a></li>
 137
 138 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/11/">November (1)</a></li>
 139
 140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2019/12/">December (4)</a></li>
 141
 142 </ul></li>
 143
 144 <li>2018
 145 <ul>
 146
 147 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/01/">January (1)</a></li>
 148
 149 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/02/">February (5)</a></li>
 150
 151 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/03/">March (5)</a></li>
 152
 153 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/04/">April (3)</a></li>
 154
 155 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/06/">June (2)</a></li>
 156
 157 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/07/">July (5)</a></li>
 158
 159 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/08/">August (3)</a></li>
 160
 161 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/09/">September (3)</a></li>
 162
 163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/10/">October (5)</a></li>
 164
 165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/11/">November (2)</a></li>
 166
 167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2018/12/">December (4)</a></li>
 168
 169 </ul></li>
 170
 171 <li>2017
 172 <ul>
 173
 174 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 175
 176 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 177
 178 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 179
 180 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 181
 182 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 183
 184 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 185
 186 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 187
 188 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 189
 190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 191
 192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (3)</a></li>
 193
 194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/12/">December (4)</a></li>
 195
 196 </ul></li>
 197
 198 <li>2016
 199 <ul>
 200
 201 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 202
 203 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 204
 205 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 206
 207 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 208
 209 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 210
 211 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 212
 213 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 214
 215 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 216
 217 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 218
 219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 220
 221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 222
 223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 224
 225 </ul></li>
 226
 227 <li>2015
 228 <ul>
 229
 230 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 231
 232 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 233
 234 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 235
 236 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 237
 238 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 239
 240 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 241
 242 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 243
 244 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 245
 246 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 247
 248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 249
 250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 251
 252 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 253
 254 </ul></li>
 255
 256 <li>2014
 257 <ul>
 258
 259 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 260
 261 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 262
 263 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 264
 265 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 266
 267 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 268
 269 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 270
 271 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 272
 273 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 274
 275 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 276
 277 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 278
 279 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 280
 281 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 282
 283 </ul></li>
 284
 285 <li>2013
 286 <ul>
 287
 288 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 289
 290 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 291
 292 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 293
 294 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 295
 296 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 297
 298 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 299
 300 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 301
 302 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 303
 304 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 305
 306 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 307
 308 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 309
 310 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 311
 312 </ul></li>
 313
 314 <li>2012
 315 <ul>
 316
 317 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 318
 319 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 320
 321 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 322
 323 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 324
 325 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 326
 327 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 328
 329 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 330
 331 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 332
 333 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 334
 335 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 336
 337 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 338
 339 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 340
 341 </ul></li>
 342
 343 <li>2011
 344 <ul>
 345
 346 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 347
 348 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 349
 350 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 351
 352 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 353
 354 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 355
 356 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 357
 358 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 359
 360 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 361
 362 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 363
 364 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 365
 366 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 367
 368 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 369
 370 </ul></li>
 371
 372 <li>2010
 373 <ul>
 374
 375 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 376
 377 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 378
 379 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 380
 381 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 382
 383 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 384
 385 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 386
 387 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 388
 389 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 390
 391 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 392
 393 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 394
 395 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 396
 397 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 398
 399 </ul></li>
 400
 401 <li>2009
 402 <ul>
 403
 404 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 405
 406 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 407
 408 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 409
 410 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 411
 412 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 413
 414 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 415
 416 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 417
 418 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 419
 420 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 421
 422 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 423
 424 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 425
 426 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 427
 428 </ul></li>
 429
 430 <li>2008
 431 <ul>
 432
 433 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 434
 435 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 436
 437 </ul></li>
 438
 439 </ul>
 440
 441
 442
 443 <h2>Tags</h2>
 444 <ul>
 445
 446  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (16)</a></li>
 447
 448  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 449
 450  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 451
 452  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 453
 454  <li><a href="http://people.skolelinux.org/pere/blog/tags/betalkontant">betalkontant (8)</a></li>
 455
 456  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (11)</a></li>
 457
 458  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (17)</a></li>
 459
 460  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 461
 462  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 463
 464  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (170)</a></li>
 465
 466  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (159)</a></li>
 467
 468  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
 469
 470  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (11)</a></li>
 471
 472  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
 473
 474  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (26)</a></li>
 475
 476  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 477
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 571
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 577     </div>
 578     <p style="text-align: right">
 579  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 580 </p>
 581
 582   </body>
 583 </html>