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# Moving from Jekyll to OrgMode, an experience report
Adolfo Villafiorita
[[!template id=vid src="https://mirror.csclub.uwaterloo.ca/emacsconf/2020/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita.webm" subtitles="/2020/subtitles/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita.vtt"]]
[Download compressed .webm video (13.8M)](https://mirror.csclub.uwaterloo.ca/emacsconf/2020/smaller/emacsconf-2020--15-moving-from-jekyll-to-orgmode-an-experience-report--adolfo-villafiorita--vp9-q56-video-original-audio.webm)
[View transcript](#transcript)
I have been a long time user of static site generators, such as
Jekyll.
I recently discovered Org Mode's publishing features and started
appreciating flexibility and capabilities, especially when literate
programming comes into play to generate "dynamic" content.
In this talk/tutorial I will present the challenges I faced and how I
finally moved my homepage and the University of Trento's Computational
Logic website to Org Mode.
<!-- from the pad --->
- Actual start and end time (EST): Start: 2020-11-28T14.36.18; Q&A:
2020-11-28T14.51.48; End: 2020-11-28T14.53.03
# Questions
## Opinion on Firn (<https://github.com/theiceshelf/firn>)?
## Do you discuss this in a blog as well? Where could I find more about it?
Talk and content will be published later after the conference. Will be
available on the talk page.
## Could you please paste your URLs in the notes below? (link to your site etc).
The source repository of the first website (my homepage) lives here:
<https://www.ict4g.net/gitea/adolfo/home> and the output is:
<https://www.ict4g.net/adolfo/>.
The source repository of the second website (Computational Logic)
lives here: <https://www.ict4g.net/gitea/adolfo/cl-2020> and the
output is: <http://datascientia.education/cl-2020>.
The talk, code and links are now availble here:
<https://www.ict4g.net/adolfo/notes/emacsconf-2020/index.html>.
<https://www.ict4g.net/gitea/adolfo/home> has the source code for the
website.
# Notes
- Main reason: Org has better support for literate programming.
- Org mode files support in Jekyll - <https://emacs.cc/jekyll-org/>.
- Mentioned: <http://juanjose.garciaripoll.com/blog/org-mode-html-templates/index.html> (org-html).
- Other static webpage generators: <https://github.com/novoid/lazyblorg/wiki/Similar-Projects>.
<a name="transcript"></a>
# Transcript
00:00:00.080 --> 00:00:03.120 Adolfo: Okay, excellent. Hello, everyone
and nice meeting you. Let me thank the the organizer for all the
organization and all the work they are doing to support us. My name is
Adolfo Villafiorita. I'm teaching at the University of Trento. I will
shortly be working at shared.tech, which is a non-profit organization
developing applications to recover surplus food.
00:00:35.680 --> 00:00:38.600 The reason of the talk today and the
reason I'm here today is to talk about my experience in moving from
Jekyll static website generator to Org Mode. The reason I moved to Org
Mode is to have better support for literate programming on the
websites at the University of Trento, where we make available the
content for the the students.
00:01:04.720 --> 00:01:08.900 First of all, what is a static website
generator? It is basically a tool which allows you to generate HTML
files out of text files containing basically two types of information:
metadata and content.
00:01:20.700 --> 00:01:23.119
Metadata is a
set of key pairs describing the
00:01:26.159 --> 00:01:28.560
content of the file, such as the title,
00:01:28.560 --> 00:01:31.733
author, tags, and so on and so forth.
00:01:31.733 --> 00:01:34.560
The content is what you actually
want to
00:01:34.560 --> 00:01:37.040
get published on the Internet in
00:01:37.040 --> 00:01:38.880
the HTML file.
00:01:38.880 --> 00:01:41.439
Usually the content is written in
00:01:41.439 --> 00:01:45.800
some kind of markup language,
00:01:45.800 --> 00:01:49.759
such as Markdown or possibly
00:01:49.759 --> 00:01:53.200
Org Mode. Jekyll is a very
00:01:53.200 --> 00:01:57.900
popular static website generator.
00:01:57.900 --> 00:01:59.840
It is written in Ruby.
00:01:59.840 --> 00:02:03.280
What it does: it systematically
00:02:03.280 --> 00:02:06.840
transforms all the input files
00:02:06.840 --> 00:02:09.440
by making the content into
00:02:09.440 --> 00:02:11.599
HTML and systematically applying a
00:02:11.599 --> 00:02:14.000
template in order to generate the
00:02:14.000 --> 00:02:17.120
HTML files, which you can then deploy
00:02:17.120 --> 00:02:19.840
on your server of choice to make them
00:02:19.840 --> 00:02:22.160
available on the Internet.
00:02:22.160 --> 00:02:26.160
One of the features most--
00:02:26.160 --> 00:02:27.500
well, I would say all
00:02:27.500 --> 00:02:30.239
static website generators have
00:02:30.239 --> 00:02:32.560
is that of being able to
00:02:32.560 --> 00:02:34.879
collect the metadata information
00:02:34.879 --> 00:02:38.400
of the files being part of
00:02:38.400 --> 00:02:39.440
your project.
00:02:39.440 --> 00:02:45.280
The reason they do that is because
00:02:45.280 --> 00:02:47.840
you sometimes want to generate pages
00:02:47.840 --> 00:02:49.280
based on the content
00:02:49.280 --> 00:02:53.200
of your projects,
00:02:53.200 --> 00:02:56.239
such as, for instance, the list of
00:02:56.239 --> 00:02:59.040
posts you have recently published, or
00:02:59.040 --> 00:03:00.400
maybe the list of tags
00:03:00.400 --> 00:03:03.840
you have defined for your post,
00:03:03.840 --> 00:03:07.280
and so on and so forth.
00:03:07.280 --> 00:03:09.760
Jekyll gives the possibility of
00:03:09.760 --> 00:03:12.400
generating this kind of dynamic
00:03:12.400 --> 00:03:14.400
content by using Liquid,
00:03:14.400 --> 00:03:18.800
which is a templating language which
00:03:18.800 --> 00:03:21.840
looks like this.
00:03:21.840 --> 00:03:24.879
So basically, you have all the
00:03:24.879 --> 00:03:26.879
constructs you can
00:03:26.879 --> 00:03:28.800
expect in a programming language.
00:03:28.800 --> 00:03:29.920
This, for instance,
00:03:29.920 --> 00:03:33.360
is a for cycle which
00:03:33.360 --> 00:03:37.440
iterates over all the posts or the
00:03:37.440 --> 00:03:39.599
files in a specific directory of the
00:03:39.599 --> 00:03:41.040
Jekyll project.
00:03:41.040 --> 00:03:45.040
For each post, it takes the title
00:03:45.040 --> 00:03:48.400
and the URL and generates a link.
00:03:48.400 --> 00:03:52.867
So Jekyll is nice and sweet,
00:03:52.867 --> 00:03:55.200
but over the years
00:03:55.200 --> 00:03:57.760
I started using more and more
00:03:57.760 --> 00:03:59.519
systematically
00:03:59.519 --> 00:04:02.000
Org Mode to write all my files.
00:04:02.000 --> 00:04:04.833
I moved from Markdown to Org Mode
00:04:04.833 --> 00:04:07.200
I am a long time Emacs user.
00:04:07.200 --> 00:04:09.167
I've been using Emacs for 30 years now,
00:04:09.167 --> 00:04:12.799
so Org Mode is a more recent discovery,
00:04:12.799 --> 00:04:17.033
but it is a very nice discovery I made.
00:04:17.033 --> 00:04:19.680
The reason I like Org Mode
00:04:19.680 --> 00:04:22.320
is because, for instance, you can write
00:04:22.320 --> 00:04:24.933
formulas using MathJax
00:04:24.933 --> 00:04:26.639
and you can generate diagrams
00:04:26.639 --> 00:04:30.320
or plots with Gnuplot.
00:04:30.320 --> 00:04:32.240
Also important is the fact that you have
00:04:32.240 --> 00:04:34.080
the possibility of publishing
00:04:34.080 --> 00:04:39.520
your documents to multiple backends
such as PDF,
00:04:39.520 --> 00:04:43.600
or maybe a Reveal presentation,
00:04:43.600 --> 00:04:47.199
or HTML. This is all made possible
00:04:47.199 --> 00:04:50.479
by Babel, which is
00:04:50.479 --> 00:04:52.560
exactly what we just saw in the
00:04:52.560 --> 00:04:54.639
previous talk:
00:04:54.639 --> 00:04:57.440
Namely, the possibility of executing a
00:04:57.440 --> 00:04:59.520
snippet of code
00:04:59.520 --> 00:05:02.560
embedded in in your pages.
00:05:02.560 --> 00:05:06.400
Our model can also be used
00:05:06.400 --> 00:05:09.600
within Jekyll. In fact,
00:05:09.600 --> 00:05:13.667
there is a a nice gem, a nice library,
00:05:13.667 --> 00:05:17.233
called jekyll-org which allows you
00:05:17.233 --> 00:05:19.680
to use Org Mode files directly
00:05:19.680 --> 00:05:22.880
into jekyll. But when you start using
00:05:22.880 --> 00:05:26.560
Org Mode... When I started using
00:05:26.560 --> 00:05:30.560
Org Mode, I realized I could move
00:05:30.560 --> 00:05:34.240
all my workflow, all my publishing
00:05:34.240 --> 00:05:36.840
workflow to Emacs.
00:05:36.840 --> 00:05:41.100
In fact, Org Mode is also a
00:05:41.100 --> 00:05:42.880
static website generator because
00:05:42.880 --> 00:05:46.240
it has got the possibility of publishing
00:05:46.240 --> 00:05:50.880
projects made of Org Mode files.
00:05:50.880 --> 00:05:53.840
One of the nice things about
00:05:53.840 --> 00:05:56.479
the publishing features of Org Mode
00:05:56.479 --> 00:05:58.880
is that it allows you to define in the
00:05:58.880 --> 00:06:01.300
org-publish-project-alist,
00:06:01.300 --> 00:06:03.199
all the the components
00:06:03.199 --> 00:06:05.367
which are part of your project.
00:06:05.367 --> 00:06:07.520
In a sense, it is
00:06:07.520 --> 00:06:10.479
also more flexible than Jekyll,
00:06:10.479 --> 00:06:12.880
because it also allows you, for instance,
00:06:12.880 --> 00:06:15.120
to publish a single file rather
00:06:15.120 --> 00:06:17.440
than having to recompile everything
00:06:17.440 --> 00:06:20.080
every time you want to publish your
00:06:20.080 --> 00:06:22.333
your project to your website.
00:06:22.333 --> 00:06:25.333
However, there are some short comments
00:06:25.333 --> 00:06:29.520
I would say, or some areas
of improvement.
00:06:30.400 --> 00:06:33.600
The first is that support for
templating
00:06:33.600 --> 00:06:36.639
is not so obvious as it is
00:06:36.639 --> 00:06:39.280
in Jekyll, even though there are some
00:06:40.560 --> 00:06:44.560
nice extensions such as org-thtml,
00:06:44.560 --> 00:06:48.400
for instance, which allows you to use
templates.
00:06:48.400 --> 00:06:51.840
More important to me was the fact that
00:06:51.840 --> 00:06:54.080
apparently, there is little support for
00:06:54.080 --> 00:06:56.133
the creation of dynamic content
00:06:56.133 --> 00:06:57.900
So I was very curious
00:06:57.900 --> 00:06:59.360
and very keen to use
00:06:59.360 --> 00:07:02.800
Org Mode for publishing my blog
00:07:02.800 --> 00:07:05.440
and the courses at the university,
00:07:05.440 --> 00:07:08.720
but then I had to find a way
00:07:08.720 --> 00:07:11.440
to being able to publish these
00:07:11.440 --> 00:07:13.599
dynamic pages, finding some kind of
00:07:13.599 --> 00:07:16.000
replacement, so to speak,
00:07:16.720 --> 00:07:17.900
for the liquid engine.
00:07:17.900 --> 00:07:24.160
The solution was there at hand,
actually, because
00:07:24.160 --> 00:07:27.280
basically, I realized I could use Babel
00:07:27.280 --> 00:07:30.800
for exactly this purpose. Rather than
00:07:30.800 --> 00:07:32.720
using Babel for generating
00:07:32.720 --> 00:07:35.759
plots or my other computations
00:07:35.759 --> 00:07:37.919
or whatever I was using them for,
00:07:37.919 --> 00:07:41.039
I realized I could use Babel to
00:07:41.039 --> 00:07:45.120
generate HTML which could be
00:07:45.120 --> 00:07:49.967
then published in the project
00:07:49.967 --> 00:07:53.680
All I needed to do then
00:07:53.680 --> 00:07:56.100
was defining some kind of functions,
00:07:56.100 --> 00:07:58.319
some kind of code in order to read
00:07:58.319 --> 00:08:01.840
the metadata of all
00:08:01.840 --> 00:08:04.767
the Org Mode files of my web project,
00:08:04.767 --> 00:08:09.680
so that I could then publish--
00:08:09.680 --> 00:08:13.280
generate the dynamic content.
00:08:13.280 --> 00:08:18.080
This is a snippet taken from
00:08:18.080 --> 00:08:21.759
one of my HTML projects,
00:08:21.759 --> 00:08:24.800
which basically shows the way in which
00:08:24.800 --> 00:08:27.599
I generate the list of posts on
00:08:27.599 --> 00:08:32.560
my page. It is exactly how the
Liquid that we saw
00:08:32.560 --> 00:08:35.680
a couple of slides earlier that
looks like
00:08:35.680 --> 00:08:39.200
in Org Mode.
00:08:39.200 --> 00:08:42.320
Basically, what I'm doing...
I'm using...
00:08:42.320 --> 00:08:46.720
I wrote a Ruby script which
00:08:46.720 --> 00:08:49.680
reads all the metadata. So this
00:08:49.680 --> 00:08:51.040
highlighted code
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basically loads the script
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which is stored externally.
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Then it collects all the
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metadata from the
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Org Mode files in the
00:09:00.880 --> 00:09:02.240
current directory.
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And then the following... The code
00:09:04.800 --> 00:09:06.480
you can see here
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basically iterates over all the
00:09:09.839 --> 00:09:12.959
posts read at the previous step.
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It generates
00:09:16.399 --> 00:09:19.519
a list with the title
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and the URLS, basically
00:09:22.959 --> 00:09:27.440
replicating what Jekyll does.
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There are some other things
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I have to deal with in order to
00:09:33.200 --> 00:09:36.480
accommodate my workflow. But that was
00:09:36.480 --> 00:09:39.200
relatively easy in the sense that one of
00:09:39.200 --> 00:09:43.279
the problems, one of the issues I had to
00:09:43.279 --> 00:09:45.360
solve was that of having
00:09:45.360 --> 00:09:48.480
a common navigation on all my
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pages. That was easily solved
00:09:51.040 --> 00:09:53.867
using the #+INCLUDE feature.
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So I basically
00:09:54.959 --> 00:09:56.000
made available
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an #+INCLUDE with all the navigation
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which is embedded in all the pages of
00:10:00.560 --> 00:10:01.839
my websites
00:10:01.839 --> 00:10:03.733
through the #+INCLUDE.
00:10:03.733 --> 00:10:06.160
Another nice feature which
00:10:06.160 --> 00:10:08.560
Jekyll has is the possibility of
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previewing a website before deploying it.
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Emacs also has got a node which allows
00:10:16.079 --> 00:10:21.200
you to launch a web server. In fact,
00:10:21.200 --> 00:10:24.320
I wrote a quick hack
00:10:24.320 --> 00:10:26.959
which allows you to
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invoke a node on an Org Mode
00:10:31.519 --> 00:10:34.720
project, start a local preview,
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and then use rsync
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in order to deploy the the website.
00:10:46.240 --> 00:10:48.720
Five minutes left. More than
00:10:48.720 --> 00:10:51.200
enough. Okay.
00:10:51.200 --> 00:10:52.967
Thanks. Thank you, thank you very much.
00:10:52.967 --> 00:10:56.480
I'm nearly done. So then I can take
some questions.
00:10:56.480 --> 00:11:00.560
Just to give you maybe
00:11:00.560 --> 00:11:03.680
a slightly more in-depth
00:11:03.680 --> 00:11:06.480
view of what the pages look like,
00:11:06.480 --> 00:11:07.200
so these are
00:11:07.200 --> 00:11:11.120
one of the pages, or the source files
00:11:11.120 --> 00:11:14.720
of one of the websites. It is
00:11:14.720 --> 00:11:18.480
in literate programming. Basically,
00:11:18.480 --> 00:11:20.399
you see there is some metadata here.
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I mean this is a regular Org Mode file.
00:11:22.640 --> 00:11:26.640
This part here
00:11:26.640 --> 00:11:29.920
basically defines some common options
00:11:29.920 --> 00:11:31.519
for publication.
00:11:31.519 --> 00:11:35.920
These two includes here
00:11:35.920 --> 00:11:41.120
put some extra HTML in the head part and
00:11:41.120 --> 00:11:44.480
the navigation. Here, as you can see,
00:11:44.480 --> 00:11:48.079
is the code generating the
00:11:48.079 --> 00:11:50.160
the list in chronological order. It is
00:11:50.160 --> 00:11:52.240
slightly more complex than the example I
00:11:52.240 --> 00:11:53.839
made in the slide
00:11:53.839 --> 00:11:56.240
because there is some more
00:11:56.240 --> 00:11:59.760
elaboration to do, including
putting some
00:11:59.760 --> 00:12:01.839
Javascript to identify
00:12:01.839 --> 00:12:05.120
according to the tags.
00:12:05.120 --> 00:12:08.160
To go back to the presentation...
00:12:11.200 --> 00:12:13.067
I managed this migration
00:12:13.067 --> 00:12:14.560
a few months ago,
00:12:14.560 --> 00:12:17.680
and then all my workflow is within
00:12:17.680 --> 00:12:20.399
Org Mode and within Emacs.
00:12:20.399 --> 00:12:23.079
I'm very happy with it because it's
00:12:23.079 --> 00:12:26.800
simplified quite a bit
00:12:26.800 --> 00:12:28.480
my publication process.
00:12:28.480 --> 00:12:31.839
One of the advantages... Another
00:12:31.839 --> 00:12:34.240
advantage... So the first advantage is that
00:12:34.240 --> 00:12:36.959
everything is in Org Mode and Emacs.
00:12:36.959 --> 00:12:38.160
Second advantage
00:12:38.160 --> 00:12:41.680
is that everything is based on the
00:12:41.680 --> 00:12:44.880
standard machinery provided by Org Mode.
00:12:44.880 --> 00:12:47.760
So in a sense, it is
00:12:47.760 --> 00:12:50.079
more robust with respect to
00:12:50.079 --> 00:12:53.040
dependencies, possible errors, and so
00:12:53.040 --> 00:12:54.320
on and so forth.
00:12:54.320 --> 00:12:56.639
The fact that Org Mode
00:12:56.639 --> 00:12:58.240
allows you to publish
00:12:58.240 --> 00:13:00.880
a single file in a project is also
00:13:00.880 --> 00:13:03.839
very interesting because
00:13:03.839 --> 00:13:07.839
it allows to be more robust to
00:13:07.839 --> 00:13:11.040
problems you might introduce when
00:13:11.040 --> 00:13:14.959
you're changing--when I'm changing the
setup.
00:13:14.959 --> 00:13:16.880
Another interesting thing which I
00:13:16.880 --> 00:13:21.519
realized that I could have is that
00:13:21.519 --> 00:13:23.600
in a sense, the specification of the
00:13:23.600 --> 00:13:28.480
website can be embedded in the website
itself.
00:13:28.480 --> 00:13:30.800
In a sense this is some kind of
00:13:30.800 --> 00:13:31.839
self-documenting...
00:13:31.839 --> 00:13:35.120
It's a way of self-documenting
00:13:35.120 --> 00:13:36.600
what I'm actually doing.
00:13:36.600 --> 00:13:44.133
For instance, here on my website,
00:13:44.133 --> 00:13:46.399
you can see the
00:13:46.399 --> 00:13:48.240
specification of the
00:13:48.240 --> 00:13:51.519
project which is loaded
00:13:51.519 --> 00:13:53.933
from my initialization file,
00:13:53.933 --> 00:13:56.320
but then it is also published
00:13:56.320 --> 00:13:59.440
together with my home page. It lives
00:13:59.440 --> 00:14:01.360
with the repository where
00:14:01.360 --> 00:14:05.360
I keep all the sources of my website,
00:14:05.360 --> 00:14:08.079
which is kind of nice because it
00:14:08.079 --> 00:14:09.839
basically isolates
00:14:09.839 --> 00:14:14.079
everything in a single place.
00:14:14.079 --> 00:14:16.880
So there are some examples. I'm
00:14:16.880 --> 00:14:19.433
showing them more because of the
00:14:19.433 --> 00:14:21.760
source code which
00:14:21.760 --> 00:14:25.519
you can grab from the git repositories
00:14:25.519 --> 00:14:26.933
if you are interested.
00:14:26.933 --> 00:14:28.399
Of course I'm also available
00:14:28.399 --> 00:14:31.600
to provide some support and help
00:14:31.600 --> 00:14:32.959
if you are interested
00:14:32.959 --> 00:14:34.480
in this kind of stuff.
00:14:34.480 --> 00:14:37.760
The the next step for me will be that of
00:14:37.760 --> 00:14:41.600
trying, making this kind of
machinery available
00:14:41.600 --> 00:14:45.199
for more general use at the moment.
00:14:45.199 --> 00:14:47.120
If you are interested in trying out my
00:14:47.120 --> 00:14:48.800
suggestion, grabbing the
00:14:48.800 --> 00:14:51.933
sources for one of the websites
00:14:51.933 --> 00:14:54.700
to seehow they look like,
00:14:54.700 --> 00:14:56.720
and maybe try and
00:14:56.720 --> 00:15:00.160
customize it for your purposes...
00:15:00.160 --> 00:15:03.839
This is basically the content of my talk.
00:15:03.839 --> 00:15:06.959
I'm open to questions and thank you
00:15:06.959 --> 00:15:10.880
for your attention.
00:15:10.880 --> 00:15:12.880
(Amin: Thank you very much, Adolfo, for your
00:15:12.880 --> 00:15:14.480
awesome presentation.
00:15:14.480 --> 00:15:17.360
I think we have time for maybe like
00:15:17.360 --> 00:15:19.360
one or two questions,
00:15:19.360 --> 00:15:21.279
and then the rest maybe you could
00:15:21.279 --> 00:15:26.639
take up after the stream.)
00:15:26.639 --> 00:15:28.033
Adolfo: What should we do?
00:15:28.033 --> 00:15:30.000
(Amin: Would you like me
00:15:30.000 --> 00:15:31.839
to read you the questions?)
00:15:31.839 --> 00:15:35.199
Adolfo: Yeah, probably better because
00:15:35.199 --> 00:15:36.700
I'm kind of lost there.
00:15:36.700 --> 00:15:40.399
(Amin: Okay, no problem.
00:15:40.399 --> 00:15:42.480
So someone asks, "Do you have any
00:15:42.480 --> 00:15:45.440
opinion on Firn?")
00:15:45.440 --> 00:15:48.639
Adolfo: Firn. I don't know Firn,
00:15:48.639 --> 00:15:51.839
so I'll give it a try
00:15:51.839 --> 00:15:55.040
and check it out.
00:15:55.040 --> 00:15:57.839
(Amin: Thanks. People are also asking,
00:15:57.839 --> 00:15:59.680
do you discuss this, for example, in a blog
00:15:59.680 --> 00:16:01.279
or anywhere else they could find more
00:16:01.279 --> 00:16:02.800
about it?)
00:16:02.800 --> 00:16:05.600
Adolfo: Oh yes. I'm going to publish the
00:16:05.600 --> 00:16:08.560
the talk and the content
00:16:08.560 --> 00:16:11.120
on my website, and then I'll link it from
00:16:11.120 --> 00:16:13.067
the EmacsConf conference
00:16:13.067 --> 00:16:14.720
so that it will be easier for
00:16:14.720 --> 00:16:16.533
people to to reach it
00:16:16.533 --> 00:16:19.040
I will shortly make it
00:16:19.040 --> 00:16:22.880
available right after the conference.
00:16:22.880 --> 00:16:26.160
(Amin: Wonderful. I think that's all
for the questions.
00:16:26.160 --> 00:16:27.667
Thank you very much.)
00:16:27.667 --> 00:16:29.600
Adolfo: Thank you very much. Thank you.
00:16:29.600 --> 00:16:34.800
(Amin: Cheers.) Adolfo: Bye, cheers. (Amin: Bye.)
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