Git, $Id$ and file names

It is already possible to use filters in Git. But embedding the current file name in the expanded string is somewhat harder. You can do this by some edit wrapper which inserts the file name “at the right time”, but I think it is much more cleaner to do this in the git-filter script. For Puppet I want system administrators to see from which directory in the Git repository the file came from, like so:
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Precise float placement

If you know LaTeX, you know that precise float placement (I want this figure to positioned right here) is almost impossible. But what nobody told you is that there exists a float package (only since 2001 - maybe even earlier). With this package you get a new placement modifier: [H], which means: “Put this damn figure right here!”. LateX users everywhere cheer. Specifics are described in the pdf in the package.
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Go book update

I’m preparing a 0.2 version of the Go book I’m writing. There are lots of small tweaks in the text and in the layout. I still need to extend the number exercises (and enhance the answers a bit), but it is slowly coming together. There is a new chapter on how to write programs that communicate with the outside world (via files, sockets, etc.). Some infrastructure work includes an automatic code checker — sadly written in Perl.
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First post running Ubuntu 10.10

Well, the upgrade was easy enough, some weird LDAP database corruption that was fixed easily by running db4.7_recover in /var/lib/ldap. There is something fishy going on in /etc/nsswitch and using ‘files’ instead of compat. Got lots of segfaults: [90474.491264] zsh[5668]: segfault at bfcf07ef ip 001be398 sp bfce4efc error 6 in libnss_files-2.12.1.so[1bc000+a000] Not enough for a bug report (yet), I still need to examine this further.
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Tweets of September 30 2010

Hoppa: pxe + puppet + git werkt perfect, servertjes komen op en wordt autom. geconfigureerd Thu Sep 30 10:53:30 +0000 2010 Nice idea and looks like a promising configuration tool: http://augeas.net/index.html Thu Sep 30 12:14:45 +0000 2010 Helemaal in mijn sas met mijn nwe samsung galaxy Thu Sep 30 20:15:15 +0000 2010
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Tweets of August 31 2010

Replying to @bdekruijff 2 proggies, wat flashen en klaar. Ik ga snel ook de foon van @snavaes flashen Tue Aug 31 05:32:11 +0000 2010 Mental note to self: nieuw toetsebord regelen. Die HP’s zijn ondingen Tue Aug 31 09:25:36 +0000 2010 Ja, dat krijg je er nou van... http://tinyurl.com/36b59c8 Tue Aug 31 11:49:24 +0000 2010 Heb de flash kriebels: zo maar eens een nightly build op een hero flashen \(of 'm bricken\)
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It is there

Congrats to SIDN % dig +dnssec +multiline DNSKEY nl ;; ANSWER SECTION: nl. 6547 IN DNSKEY 256 3 8 ( AwEAAbXfJH0LevocrgMOI62Y0+oD02AxPrsXja59z11c cqgW527Ghac2f1aj32a4c1Wc+H6UhTy+daf6LkVytw0l lMmzDDVn/YHcfh7B+9DdbVjdBHvY6q+YTnZbsU3wGwod PMneYJZl8d47eFYmraKKl/endifNukan0z4GkaKYHuI1 ) ; key id = 37408 nl. 6547 IN DNSKEY 257 3 8 ( AwEAAekt0eDh+EmOVQMh1av++d5F6eS3B85YkFW9OBQN 8X9EA1rG8vl9TRHFBUfpu/vIaUJeuXV9tm/PO+qhNyIL WxI26W1t1/EKr1WhbaNsLXPMhjtuelPqpxuQL/onXvhB 83uPcF88pjnKmu73pcdhInLfYkf4JfARztj4e+xaddoL 5eJ0Fj3KMVd303NAsH0tmRPBi3EGMAOtM4Ic84Rn8ZkH bwmVUQ3n4qRYaLpgvmpX82RUpEkgPxhrrJGENp1QYGPv 0oWPWkcJcSUGsEBgjLSal5IzTJmOEFm7nzbvyrfq/KJX PZZRfJgPpFPwqNfY+GlTfb39kDEcB34z2LCNM2U= ) ; key id = 38420 nl. 6547 IN RRSIG DNSKEY 8 1 7200 20100902004149 ( 20100819064254 38420 nl. 0/C52WJ2OjQZOrP8y7relQWGVS5gmJLnwnrbic7dGNeJ PVjI7W2gXgt8vVTg36bQ6gVpX7GG2zwvNA/cYTGYnfvF n+0HpA8oZLqeVh1rbQR3oU+iym5F4vX1pka7pbJk358x O9B9KsMFXH9exCoHHXzu/SU3D/TPZ60imrNgvJp6iOci kPeomSQhwKmyyKBUheaOocdV/XIMtzFwOnKYV6bu9wCq PXtOj4Qhp8Ty7mGMnOSpgAzwWcksvqmSZeNpC/tLT/57 TxefWNNGlbdY7+fxvA0T+AQVn0xctsS1y194SAv92kZW azVQ9+ZYxQLVZqwSl1/ZBo8spxT1aiwMnw== )
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Go number cruncher

Write a number cruncher that works as follows: Pick six (6) random numbers from this list: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 25, 50, 75, 100 Numbers may be picked multiple times. Pick one (1) random number (i) in the range: 1 . . . 1000 Tell how, by combining the first 6 numbers or or subset with the operators +,-,* and /, you can make i;
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Learning Go - version 0.1

I’ve tagged an 0.1 version of the book I’m writing: “Learning Go”. It currently has 7 chapters. The first five are finished. Chapter 6 and 7 still need work. The exercises can also use some (more) love. The current chapter list of “Learning Go” is: Introduction Basics Functions Packages Beyond the basics Concurrency Communication To get it: PDF download Gitweb repository If you have comments, text or exercises feel free to drop an email.
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Formatting Go code with Vim

There are no formatting rules when writing Go code, but there is an official style. If you pipe your code through gofmt, its output is the official style. So while writing you need to occasionally execute: %!~/bin/gofmt (which I’ve wrapped in a command, so I only need to type :Fmt). But the trouble is that executing this code resets the cursor to the first line and you then have to jump back to whatever line number you were on.
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Go DNS online

The last couple of days I’ve been working on (better) DNS support in Go. I think it would be very nice to get something like ldns in Go, but then in less lines of code. I’ve just published the first code on godns @github. This is heavily based on the DNS implementation currently in Go, in the net-package. Current additions consist of: AAAA support; Parsing rdata to hex or base64; Groundwork for DNSSEC types (DS, DNSKEY, RRSIG); Groundwork for EDNS0.
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Computer Languages

I have done programming in (or at least looked at) the following computer languages during my live. Of course the world is not a perfect place, but some languages out there are just plain awful. BASIC - with line numbers! At the time (I was 11) didn’t know there was something else out there. Fun and easy language, although I never programmed in it ever again. Pascal - After BASIC, there is no going back to Pascal.
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Tweets of June 30 2010

Warm welkom voetballers Noord Korea: http://tinyurl.com/2cz7l4c Warm lood wrs Wed Jun 30 10:08:59 +0000 2010 Replying to @danielaukes je moet gewoon veel drinken, dan komt het wel goed Wed Jun 30 12:24:21 +0000 2010 En toen was het officieel: per 1 sept treed ik in dienst bij SIDN. Jeuh! Wed Jun 30 14:28:47 +0000 2010 \(even algemeen\) dank. Ja, ik ga met DNSSEC pielen, maar ook nog \(veel\) andere zaken.
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Go Book Building

I’m still “writing a Go Book” which boils down to playing with , Go and Vim. Building the whole document might be a bit tricky, because of all the packages you may need. Assuming you already installed TexLive on your system, you will further need to apt-get install: texlive-xetex ttf-droid latex-cjk-common latex-cjk-japanese-wadalab latex-cjk-xcjk latex-xft-fonts latex-fonts-recommended ttf-sazanami-gothic inkscape (for .svg to .pdf conversion) Which should make it build. If not, please let me know.
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Fuzzy fonts in Chromium Browser Under Linux

I did a small upgrade to the newest version of Chromium and all of the sudden the fonts in the browser area were all blurry and fuzzy… After some searching it turned out that WebKit (which Chromium uses for the rendering) uses the settings from font-config instead of the whatever you click inside your DE’s configuration tools. % fc-match -v Arial | egrep 'family|hint' family: "Arial"(s) familylang: "en"(s) hintstyle: 1(i)(w) <- '1' means slight hinting hinting: FcTrue(w) autohint: FcFalse(s) And to remedy the situation:
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Remember text in LaTeX

After reading the Android Book from O’Reilly I saw some nice use of bullets alongside source code which allowed for extra explanation to be given after the code. I thought only one thing: I want to use that too, but then in . After fiddling around for an evening it finally looked like this: There are two ways you can do this. The easy way is to write a few macros which create numbered bullets in the code and then use these numbers manually after the code to add your explanation.
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Tweets of May 31 2010

In ubuntu 10.04 gebruikt openoffice nog steeds z’n eigen print dialog... Geef mijn maar Abiword Mon May 31 20:45:33 +0000 2010 @snavaes eet morgen niet mee. Nu dus een dilemma. Friet of Chinees? Mon May 31 20:48:39 +0000 2010
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Go Book

I’m writing a book about Go. It is very much a work-in-progress, but I just wanted to mention this work and publish a snapshot. The aim is to explain Go and to provide many (many) exercises (and answers) so people may learn this wonderful language. It is written using (of course), see gitweb for the code. Help is appreciated. The pdf of today (aka daily build) can be found here.
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Hibernate and suspend with Ubuntu 9.10

I have an Asus EeePC on which I’ve installed Ubuntu 9.10. But now I wanted a working hibernate (suspend to disk) and suspend (suspend to memory). Hibernate was working out of the box (well the going to sleep part, at least), but resuming took almost as long as a cold boot. Another thing was that my wireless was broken after a resume. On my happiness scale (range: 0-10) this scored a 3.
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Tweets of February 28 2010

@digiplace heh :) Ik ga nu precies hetzelfde doen. Op naar de kelder! Sun Feb 28 14:11:50 +0000 2010 Goed nog 100G backuppen en ik kan beginnen met installeren Sun Feb 28 15:21:07 +0000 2010 Hmmm, zo weer ff de single user mode in om /home ext4 te maken en dan weer alles fixen \(kerberos, ldap, etc\) Sun Feb 28 17:16:28 +0000 2010 Tip: maak een text dump van je ldap database als je van 32 bit naar 64 bit upgrade
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Ubuntu Lucid Alpha-3

I want to upgrade my server to the new Ubuntu and switch to 64 bit on my main server. This is how I managed to get Ubuntu Lucid (Alpha 3) running on my (test) machine, with RAID1 + BTRFS and 64 bit. It is a running story on how I spend my Saturday afternoon, you might need some decent Linux knowledge to follow my lead. Here we go. The following lists sums up my needs and troubles:
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LaTeX Nirvana

I’m no fan of Word or OpenOffice for that matter, all that WYSIWYG stuff is not for me. For years now I’m using LaTeX for my editing needs. An added bonus for using LaTeX is that the output is stunning. But for really nice looking output I wanted the following: Fonts in images/graphics should match the font of the main document TrueType fonts, instead of the standard TeX fonts. To avoid the “Heeh, that looks like a LaTeX document”-reactions; UTF-8 support and international character support; Easy integration of images (SVG based); Automatic building.
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Tweets of January 31 2010

’t was ff pielen, maar nu heb ik een mooie LaTeX mal voor Go, nu dan het moeilijkste: content Sun Jan 31 11:41:05 +0000 2010 met fdisk /dev/sda kijken of je uberhaupt nog Windows hebt, maar die is dus echt weg \(dan maar geen HTC rom flash\) Sun Jan 31 12:51:30 +0000 2010 redelijk in mijn nopjes met de layout: http://tinyurl.com/yezh73l Sun Jan 31 15:39:24 +0000 2010 Fout gemaakt door 24 te gaan kijken
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Go tutorial in Dutch

During the last few weeks I’ve attempted to translate the Go tutorial to Dutch. This was a lot more work than anticipated and I’m still not finished, but I just wanted to share what I’ve got up to now. You can get the text version here. Things do Finish translating the last few paragraphs; Proof read; Spell check; Update it to the latest Go release; Get this included in Go?
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