+ <div class="entry">
+ <div class="title"><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></div>
+ <div class="date"> 4th January 2017</div>
+ <div class="body"><p>Do you have a large <a href="https://icalendar.org/">iCalendar</a>
+file with lots of old entries, and would like to archive them to save
+space and resources? At least those of us using KOrganizer know that
+turning on and off an event set become slower and slower the more
+entries are in the set. While working on migrating our calendars to a
+<a href="http://radicale.org/">Radicale CalDAV server</a> on our
+<a href="https://freedomboxfoundation.org/">Freedombox server</a/>, my
+loved one wondered if I could find a way to split up the calendar file
+she had in KOrganizer, and I set out to write a tool. I spent a few
+days writing and polishing the system, and it is now ready for general
+consumption. The
+<a href="https://github.com/petterreinholdtsen/ical-archiver">code for
+ical-archiver</a> is publicly available from a git repository on
+github. The system is written in Python and depend on the vobject
+Python module.</p>
+
+<p>To use it, locate the iCalendar file you want to operate on and
+give it as an argument to the ical-archiver script. This will
+generate a set of new files, one file per component type per year for
+all components expiring more than two years in the past. The vevent,
+vtodo and vjournal entries are handled by the script. The remaining
+entries are stored in a 'remaining' file.</p>
+
+<p>This is what a test run can look like:
+
+<p><pre>
+% ical-archiver t/2004-2016.ics
+Found 3612 vevents
+Found 6 vtodos
+Found 2 vjournals
+Writing t/2004-2016.ics-subset-vevent-2004.ics
+Writing t/2004-2016.ics-subset-vevent-2005.ics
+Writing t/2004-2016.ics-subset-vevent-2006.ics
+Writing t/2004-2016.ics-subset-vevent-2007.ics
+Writing t/2004-2016.ics-subset-vevent-2008.ics
+Writing t/2004-2016.ics-subset-vevent-2009.ics
+Writing t/2004-2016.ics-subset-vevent-2010.ics
+Writing t/2004-2016.ics-subset-vevent-2011.ics
+Writing t/2004-2016.ics-subset-vevent-2012.ics
+Writing t/2004-2016.ics-subset-vevent-2013.ics
+Writing t/2004-2016.ics-subset-vevent-2014.ics
+Writing t/2004-2016.ics-subset-vjournal-2007.ics
+Writing t/2004-2016.ics-subset-vjournal-2011.ics
+Writing t/2004-2016.ics-subset-vtodo-2012.ics
+Writing t/2004-2016.ics-remaining.ics
+%
+</pre></p>
+
+<p>As you can see, the original file is untouched and new files are
+written with names derived from the original file. If you are happy
+with their content, the *-remaining.ics file can replace the original
+the the others can be archived or imported as historical calendar
+collections.</p>
+
+<p>The script should probably be improved a bit. The error handling
+when discovering broken entries is not good, and I am not sure yet if
+it make sense to split different entry types into separate files or
+not. The program is thus likely to change. If you find it
+interesting, please get in touch. :)</p>
+
+<p>As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&label=PetterReinholdtsenBlog">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
+</div>
+ <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>
+ </div>
+ <div class="padding"></div>
+
<div class="entry">
<div class="title"><a href="http://people.skolelinux.org/pere/blog/Appstream_just_learned_how_to_map_hardware_to_packages_too_.html">Appstream just learned how to map hardware to packages too!</a></div>
<div class="date">23rd December 2016</div>
</div>
<div class="padding"></div>
- <div class="entry">
- <div class="title"><a href="http://people.skolelinux.org/pere/blog/Coz_profiler_for_multi_threaded_software_is_now_in_Debian.html">Coz profiler for multi-threaded software is now in Debian</a></div>
- <div class="date">13th November 2016</div>
- <div class="body"><p><a href="http://coz-profiler.org/">The Coz profiler</a>, a nice
-profiler able to run benchmarking experiments on the instrumented
-multi-threaded program, finally
-<a href="https://tracker.debian.org/pkg/coz-profiler">made it into
-Debian unstable yesterday</A>. Lluís Vilanova and I have spent many
-months since
-<a href="http://people.skolelinux.org/pere/blog/Coz_can_help_you_find_bottlenecks_in_multi_threaded_software___nice_free_software.html">I
-blogged about the coz tool</a> in August working with upstream to make
-it suitable for Debian. There are still issues with clang
-compatibility, inline assembly only working x86 and minimized
-JavaScript libraries.</p>
-
-<p>To test it, install 'coz-profiler' using apt and run it like this:</p>
-
-<p><blockquote>
-<tt>coz run --- /path/to/binary-with-debug-info</tt>
-</blockquote></p>
-
-<p>This will produce a profile.coz file in the current working
-directory with the profiling information. This is then given to a
-JavaScript application provided in the package and available from
-<a href="http://plasma-umass.github.io/coz/">a project web page</a>.
-To start the local copy, invoke it in a browser like this:</p>
-
-<p><blockquote>
-<tt>sensible-browser /usr/share/coz-profiler/viewer/index.htm</tt>
-</blockquote></p>
-
-<p>See the project home page and the
-<a href="https://www.usenix.org/publications/login/summer2016/curtsinger">USENIX
-;login: article on Coz</a> for more information on how it is
-working.</p>
-</div>
- <div class="tags">
-
-
- Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
-
-
- </div>
- </div>
- <div class="padding"></div>
-
<p style="text-align: right;"><a href="index.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS feed" width="36" height="14" /></a></p>
<div id="sidebar">
<h2>Archive</h2>
<ul>
+<li>2017
+<ul>
+
+<li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (1)</a></li>
+
+</ul></li>
+
<li>2016
<ul>
<li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (336)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (337)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
- <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (49)</a></li>
+ <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (50)</a></li>
<li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (5)</a></li>
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