Older blog entries for ralsina (starting at number 690)

Creating a Site (Not a Blog) with Nikola

One of the most frequent questions I get about Nikola is "but how do I create a site that's not a blog?". And of course, that's because the documentation is heavily blog-oriented. This document will change that ;-)

Since it started, Nikola has had the capabilities to create generic sites. For example, Nikola's own site is a fairly generic one. Let's go step by step on how you can do something like that.

Using 5.3?

This tutorial is based on Nikola from github master. Some details are not correct for the 5.3 release. Master works quite well most of the time, but you may want to wait until the 5.4 release in a few days (which will include an updated version of this document).

As usual when starting a nikola site, you start with nikola init which creates a empty semi-configured site:

$ nikola init mysite
Created empty site at mysite.

Then we go into the new mysite folder, and make the needed changes in the conf.py configuration file:

# Configuration, please edit

# Data about this site
BLOG_AUTHOR = "Roberto Alsina"
BLOG_TITLE = "Not a Blog"
# This is the main URL for your site. It will be used
# in a prominent link
SITE_URL = "http://notablog.ralsina.com.ar"
BLOG_EMAIL = "ralsina@kde.org"
BLOG_DESCRIPTION = "This is a demo site (not a blog) for Nikola."

# Some things in the middle you don't really need to change...

post_pages = (
    ("pages/*.txt", "", "story.tmpl", False),

And now we are ready to create our first page:

$ nikola new_post -p
Creating New Post

Enter title: index
Your post's text is at:  pages/index.txt


The -p option in the nikola new_post command means we are creating a page and not a blog post.

We can now build and preview our site:

$ nikola build
Scanning posts.done!
.  render_site:output/categories/index.html
.  render_sources:output/index.txt
.  render_rss:output/rss.xml
: [Much more of the same]

$ nikola serve
Serving HTTP on port 8000 ...

And you can see your (very empty) site in http://localhost:8000

So, what's in that pages/index.txt file?

.. title: index
.. slug: index
.. date: 2013/03/01 10:26:17
.. tags:
.. link:
.. description:

Write your post here.

Title is the page title, slug is the name of the generated HTML file (in this case it would be index.html) the date doesn't matter much in not-blogs, same for tags and link. Description is useful for SEO purposes if you care for that.

And below, the content. By default you are expected to use reStructured text but Nikola supports a ton of formats, including Markdown, plain HTML, BBCode, Wiki, and Textile.

So, let's give the page a nicer title, and some fake content. Since the default Nikola theme (called "site") is based on bootstrap you can use anything you like from it:

.. title: Welcome To The Fake Site
.. slug: index
.. date: 2013/03/01 10:26:17
.. tags:
.. link:
.. description: Fake Site version 1, welcome page!

.. class:: hero-unit span6

.. admonition:: This is a Fake Site

    It pretends to be about things, but is really just an example.
    So, don't click this button, it leads nowhere.

    .. class:: btn

    Click Me!

.. class:: span5

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris non nunc turpis.
Phasellus a ullamcorper leo. Sed fringilla dapibus orci eu ornare. Quisque
gravida quam a mi dignissim consequat. Morbi sed iaculis mi. Vivamus ultrices
mattis euismod. Mauris aliquet magna eget mauris volutpat a egestas leo rhoncus.
In hac habitasse platea dictumst. Ut sed mi arcu. Nullam id massa eu orci
convallis accumsan. Nunc faucibus sodales justo ac ornare. In eu congue eros.
Pellentesque iaculis risus urna. Proin est lorem, scelerisque non elementum at,
semper vel velit. Phasellus consectetur orci vel tortor tempus imperdiet. Class
aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos

[And more in the same vein]

TIP: Nice URLs

If you like your URLs without the ".html" then you want to create folders and put the pages in index.html inside them. Example:

nikola new_post -p pages/foo/index.txt

which will create a page you could access as "http://yoursite.com/foo"

And that's it. You will want to change the SIDEBAR_LINKS option to create a reasonable "menu" for your site, you will want to hack the theme (check nikola help bootswatch_theme for a quick & dirty solution), and you may want to add a blog later on, for company news or whatever.

TIP: So, how do I add a blog now?

First, change the post_pages option like this:

post_pages = (
    ("pages/*.txt", "", "story.tmpl", False),
    ("posts/*.txt", "blog", "post.tmpl", True),

And to avoid a conflict (because blogs try to generate /index.html:

INDEX_PATH = "blog"

Create a post with nikola new_post and that's it, you now have a blog in http://yoursite.com/blog (you may want to add links to it in SIDEBAR_LINKS of course).

You can see the finished site in http://notablog.ralsina.com.ar and its full configuration in http://ralsina.com.ar/listings/notablog/conf.py.html

I hope this was helpful!

Syndicated 2013-03-01 12:49:41 from Lateral Opinion

Load Testing Nikola

Nikola generates static sites, so load testing it is not very interesting, except as a benchmark for the difference between static and dynamic sites.

Today I was told about blitz.io and since a quick test is free, I thought, why not? The result is quite impressive: a cheap VPS, using gatling as a web server, which is almost configuration-free and not meant for extremely high loads, can handle roughly 9 million daily hits.

Let me say that again: 9 million hits. On a unconfigured $5 server. Here's the report

How much tuning does it take for a wordpress instance to serve that? On what hardware?

And that's only half the picture. Not only are Nikola's static pages incredibly light on your server, we have also spent a lot of effort trying to make individual pages load fast, for a better user experience. Some of the techniques used for fast-loading sites are:

  • Using webassets to bundle CSS and JS into single files.
  • Automatic support for CDNs for the common JS libraries
  • Support for transparently using HTML/CSS/JS/Image compression tools

So, if you try something like YSlow! on a Nikola site, it will give you a score of roughly 93 up to 98 (out of 100) depending on your webserver configuration.

BTW: I really want to get that up to 100. Really want it

So, remember, if your site can be served statically, it's going to be cheaper, faster, safer. And if you ever get 9 million hits a day, it will be available.

Blitz.io is sending me a t-shirt ;-)

Syndicated 2013-02-25 17:34:16 from Lateral Opinion

Colón Al Colón

Spanish only, sorry!

Un lugar común en la charla política argentina es "se gastan la plata en Fútbol para Todos en vez de cosas importantes". Siempre me hizo un poco de ruido, a ver si me sale explicar por qué.

Para empezar parte de una jerarquía de prioridades, hay cosas más importantes que otras, y una de ellas, el fútbol, es menos importante que alguna, y por lo tanto no habría que gastar dinero en ella. Eso es un argumento de calidad dudosa, ya que no se gasta dinero únicamente en la cosa más importante.

Imagináte que en tu casa se llega a un consenso, y deciden que la cosa más importante es la comida, y a continuación gastan el 100% de todos los sueldos en comida. Eso parece razonable? No. Las prioridades definen en qué se gasta más o menos y en algún caso si hay que cortar algo se cortará lo menos importante, pero "A es más importante que B" no es, a priori, motivo para no gastar nada en B.

Lo que sí sería motivo para no gastar nada en fútbol sería que provocara un daño. Por ejemplo, a mí me gustaría que el gobierno no gastara un peso en ejército, porque no veo que sirva para nada, e históricamente (digamos los últimos cien años) el ejército argentino y sus aledaños han sido claramente un factor negativo en la vida de la nación, desde bombardear Buenos Aires, a invadir Malvinas, derrocar gobiernos, etc. Aún si sos, ponéle, antiperonista, y creés que Perón es la causa de todos los males... bueno, el viene del ejército.

Pero no creo que el fútbol sea algo malo en sí mismo. No es como si estuvieran gastando la guita en petardos. Entonces, comparémoslo con algo similar. Comparémos a Colón (de Santa Fe) con el Colón.

En el fondo, tanto el fútbol (y Colón) como el Colón, son entretenimiento. Son circo. Los presupuestos son comparables (dentro de un orden de magnitud, o sea, no es que el fútbol cuesta cien veces más). Si bien el origen de los fondos es distinto, para este análisis no hace diferencia, es plata pública, plata de impuestos.

¿Qué nos dá el Colón, que no nos dá Colón? Nos dá ópera y ballet. Formas artísticas que al 93% (porcentaje inventado) no les mueve un pelo. Colón (no el colón) nos dá fútbol, apreciado por un porcentaje mucho mayor de la población.

El Colón nos da, dije, esas formas artísticas, apreciadas en gran parte por gente que, seamos sinceros, podría pagar por ellas. Sí, hay una cantidad de gente de clase media y baja que va al Colón. También hay un montón de oligarcas que van a ver espectáculos pagados por los impuestos de gente a la que no le interesa en lo más mínimo pagar por ellos. El Colón subvenciona el entretenimiento de los ricos.

Sí, también es cierto que Colón (el equipo) provee fútbol, que mucha gente (yo incluído) no tiene ningún interés en ver (especialmente a Colón), pero cada fin de semana más gente aprecia un partido del Sabalero que la audiencia de media temporada de lírica.

¿Entonces, si uno hiciera un cálculo utilitario, por qué habría que pagar por el Colón para pocos y no por Colón, para muchos? ¿Por qué nadie pide que cierren el Colón?

¿No hay una hipocresía ahí? ¿No hay un juicio de que el Colón es cultura mientras que el fútbol no lo es? ¿Es ése en realidad el argumento?

Yo, personalmente, nunca fuí a ver un espectáculo al Colón, igual que nunca fuí a ver a Colón (debo haber ido a ver a Unión 8 veces en 30 años, con la consiguiente desilusión paterna), pero sé que hay gente que aprecia cada una de esas cosas, y sé que el "problema" de no apreciarlas es mío. No de ellos. No está mal que les guste la lírica, o el ballet, o el Torneo Clausura.

Y no está mal que un gobierno le dé a la gente algo que les guste. No está mal que el Colón le dé a los porteños motivo de orgullo porque tienen ese teatro ahí, y a algunos el placer de ir a ver una función. No está mal que Colón le dé a los sabaleros motivo de orgullo porque están en primera, y el placer de ir a ver un partido. Y no está mal que un gobierno ponga plata para eso.

Aunque eso no sea tan importante como el Garrahan, o como repavimentar una ruta, o como pagar un policía. Por lo menos no la están gastando en el ejército.

Syndicated 2013-02-22 17:35:24 from Lateral Opinion

New Nikola Tutorial

Tim van der Linden has written a impressive tutorial about how he used Nikola to create his new site shisaa.jp

It documents the whole process from scratch, starting by downloading Nikola up to building your own theme.

Even if you are already using Nikola you may find some new stuff there, so take a read (also, his theme is so pretty :-)

Syndicated 2013-02-21 17:41:38 from Lateral Opinion

Math Works Now

Docutils has supported math rendering for a while now. That means Nikola should have supported it for a while too, but never did correctly because ... well, because noone ever tried, maybe?

Well, it does now, because Damian Avila has fixed it!


Syndicated 2013-02-20 10:13:22 from Lateral Opinion

Nikola 5.3 released

I am happy to announce the release of version 5.3 of Nikola a static blog/site generator. It includes some minor features and a good amount of bugfixing. Upgrading to it should not cause you any trouble, as far as I know.

Here's the changelog:


  • Bootstrap 2.3.0
  • Optionally use content distribution networks for jquery and twitter-bootstrap (USE_CDN option)
  • Improve progressive rendering by moving javascript to the bottom of pages
  • New Brazilian portuguese translation.
  • New planetoid experimental extra_plugin


  • Make really sure we import the right conf.py
  • Make SLUG_TAG_PATH a config dep for most pages
  • Removed meta title tag for better HTML validation
  • Removed #999 background from footnote backlink.
  • Made footnote references be superscripted.
  • Centered figure's image and caption.
  • Removed outset border from admonitions.
  • Use default theme as last resource for messages/translations
  • DATE_FORMAT option was being ignored
  • Remove trailing "" on windows gallery links (Issue #298)
  • Inconsistent breadcrumbs in gallery pages (Issue #303)
  • Use source files as bundle dependencies instead of outputs (Issue #294)


Syndicated 2013-02-19 12:49:20 from Lateral Opinion

Gadget Review: INCIPIO Universal 1 Port 750mAh Backup Battery


It's roughly the size of my thumb (a bit thicker, a bit shorter), cable is not included and needed.

I got this at the till while buying socks in San Mateo for 5 dollars.

What is it?
A small prism with a male foldable USB socket on one end, a female USB socket, a battery in the middle, a tiny button and tiny led.
How does it work?
When you are plugging stuff to charge via USB, you plug this in the middle, so computer -> backup battery -> gadget. That charges the gadget and the backup battery. Then you throw it in your pocket/bag when you leave home.
What does it do?
It lets you recharge roughly half a phone's full charge, when you inevitably run out of battery, so unless you forget to charge both things, you'll manage to survive.
What could be better?
It could come with a micro-usb male instead of a USB female, because that means you also have to carry a cable (no big deal)
What does the button do?
It stops/starts the current flow into the gadget.
What does the LED do?
Tells you if current is flowing (green) or if it's charging (red).
Can you charge anything?
Yes, but 750mAh is enough to keep a Nexus 7 working for about 30 seconds ;-) Does a decent job on a Kindle though!
Are you going to lose it?
Oh yes, the thing is tiny.

Not a bad 5 dollar gadget. However, you can find it in Amazon for $30 at some places, and that's robbery.

Syndicated 2013-02-10 19:53:43 from Lateral Opinion

Gadget Review: Kindle Paperwhite

I have had a Kindle Paperwhite (with ads) for a month. I was a big fan of my previous kindles, specially the 4th-gen non-touch one. I preferred it to the Kindle Touch because it was lighter, the bezel was shallower, and it had dedicated page-flipping buttons.

So, why did I get a Paperwhite instead of the cheaper 4th gen after I sold my Touch? Because of the darkness.

Reading is an enjoyable activity, and I read almost anywhere, in the supermarket queue, while having breakfast, while on the train, and in bed. But in bed, the older Kindles required me to turn on the light, like a caveman.

Of course, I could read in my cellphone (small) or in a tablet (heavier!) or in a book (again, lights, caveman!) So, this was the logical choice.

It still doesn't have the buttons, and it still has a touchscreen which makes little sense in a Kindle (except for the keyboard) and the bezel is intermediate. But the lighting is glorious. Sure, it's uneven at the bottom. So is the lighting in a paper book while in bed (check it out). But it's not all that heavy (even with the fancy cover), and it has a similarly glorious battey life.

The cover is really great. It feels like leather/rubber, it's solid, has a deadgrip on the device, and it turns on/off when you flip it open/closed, so you don't have to hunt for the tiny button at the bottom.

The font selection is a welcome improvement, although none compares well to the default.

Also, WTF happened to the audio? Why is it gone?

So my ideal Kindle that will never exist would be: a 4th gen with frontlight and smart cover. A man can always dream.

Syndicated 2013-02-10 17:54:49 from Lateral Opinion

Nikola 5.2 released!

I am thrilled to announce that you can now download Nikola 5.2. a new version of my static blog/site generator.

What's new in this version? A LOT. Don't let the minor version tick fool you, this version is packed with goodness. Let's start with features:

You can easily embed more content:

  • New vimeo directive for restructured text.
  • Custom "gist" directive providing reStructured text support for GitHub gists.

You can write your content in almost any markup:

  • Textile markup support.
  • Creole Wiki markup support.
  • txt2tags markup support.
  • bbcode markup support.
  • And of course, it still supports reStructured text, Markdown and HTML.

More languages:

  • New Catalá translation
  • New polish translation.
  • New Simplified Chinese translation.
  • Use multilingual Disqus (although it doesn't seem to work)

You can import your data:

  • New Blogger/Blogspot importer
  • Much improved Wordpress importer
  • Extract metadata from filename by using regexp (helpful for importing from octopress or other systems).

You can do fancier and more configurable sites:

  • One-page, dynamic-loading, client-rendered site plugin (task_mustache)
  • Recursive post/story folders
  • Local search based on Tipue (extra_plugins/task_localsearch)
  • Added comments to image galleries
  • New option RSS_TEASERS
  • New STORY_INDEX option to generate index.html in story folders.
  • Add multi size favicon support.

You can use Python 2.6 or higher ... including Python 3. The only missing bit for full Python 3 support is Google sitemap generation.

And of course, a lot of bugs got smashed:

  • Added sane defaults for most options, so you can have a lean config file.
  • Made layout of the site theme responsive, with collapsing navbar.
  • Use timeline instead of parsing post_pages in generic_page_renderer and task_render_pages.
  • Updated disqus integration code, added identifiers so it works on any URL.
  • Make sure folder links end in "/" in the gallery code.
  • Removed copy of PyRSS2Gen, made it a dependency.
  • Detect "namespace" dependencies for Mako templates.
  • Use consistent encodings in RSS feeds.
  • Refactored disqus code into separate helpers
  • Use the correct extension (or raise an error) on new_post
  • Fix titles that include quotes
  • Updated to current CSS from docutils (was using version from 2005)
  • Avoid needless regeneration of gallery indexes.
  • Always ensure the folder for the new post exists.
  • Get title from filename if not available in metadata.
  • Don't copy sources if they end in ".html"
  • Don't link to unexisting translations.
  • Sort tags case insensitive.


Syndicated 2013-02-06 20:37:56 from Lateral Opinion

Siempre que pasa un tren.

Escuchando "Mi Gin Tonic" de Calamaro con mi señora, escuchamos "Hay un deseo que pido siempre que pasa un tren". Me río, digo "Ese verso es una pancheza", y ella me aclara que cuando estás en el andén y pasa el tren, hay que pedir un deseo.

Jamás había oído hablar de esa superstición, y entonces caigo: es porque en Santa Fe nunca pasa el tren. Esto me abre la puerta a inventar supersticiones hiperlocales, como "cuando te mea una catinga indica futuro infortunio en el amor", o "el paso del camalote predice el clima". O, como decía mi vieja, "si cruzan los sirirís, viene tormenta".

Los dejo con Calamaro:

Syndicated 2013-02-01 12:45:12 from Lateral Opinion

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