A short announcement, probably meaningless to most people, but who knows: I've
created an Ubuntu PPA with the latest
QBS. The reason why
this might make some sense is that this PPA targets the older Ubuntu
distributions. It's currently built for 14.04 (Trusty, which is no longer
supported by Canonical), and I'll eventually upload the QBS package for 16.04,
This package can be useful to people distributing applications in the AppImage
format, where one usually builds the application in one
older distribution in order to increase the chances of it being runnable in as
many Linux distributions as possible. A simpler way to obtain QBS on Trusty is
to install QtCreator, but that's not trivial to install in an automated way and
might not come with the latest QBS. Especially when building on Ubuntu, a
package from a PPA is much easier to install.
This QBS is built statically, and won't install any Qt libraries on your
system; this is good, because it allows you to use whatever Qt version you like
without any risk of conflicts.
I just released PhotoTeleport
0.12, which includes the
feature mentioned in the title of this blog post. Given that it took me some
time to understand how this could work with Qt, I think it might be worth
spending a couple of lines about how to implement it.
In the target application
The first step (and the easiest one) is about adding the proper information to
your .plist file: this is needed to tell MacOS what file types are supported
by your application. The official documentation is
but given that an example is better than a thousand words, here's what I had to
add to PhotoTeleport.plist in order to have it registered as a handler for
…more dict entries for other supported file formats…
This is enough to have your application appear in Finder's "Open with…" menu
and be started when the user selects it from the context menu, but it's only
half of the story: to my big surprise, the selected files are not passed to
your application as command line parameters, but via some MacOS-specific event
which needs to be handled.
By grepping into the Qt source code, I've found out that Qt already handles the
event, which is then transformed into a
documentation here is quite helpful, so I won't waste your time to repeat it
here; what has hard for me was to actually find that this functionality
exists and is supported by Qt.
In the source application
The above is only half of the story: what if you are writing an application
which wants to send some files to some other application? Because of the
sandboxing, you cannot just start the desired application in a QProcess and
pass the files as parameters: again, we need to use the Apple Launch
so that the target application would receive the files through the mechanism
Unfortunately, as far as I could find this is not something that Qt supports;
sure, with QDesktopServices::openUrlExternally() you can start the default
handler for the given url, but what if you need to open more than one file at
once? And what if you want to open the files in a specific application, and not
just in the default one? Well, you need to get your hands dirty and use some
In Imaginario I've saved this into a macos.mm
file, added it to the source files, and also added the native MacOS libraries
to the build (qmake):
LIBS += -framework CoreServices
You can see the commit implementing all
it really doesn't get more complex than this. The first parameter to the
MacOS::runApp() function is the name of the application; I've verified that
the form /Applications/YourAppName.app works, but it may be that more
human-friendly variants work as well.
Recently I've grown an interest to the indieweb:
as big corporations are trying to dictate the way we live our digital
life, I'm feeling the need to take a break from at least some of
them and getting somehow
more control over the technologies I use.
Some projects have been born which are very helpful with that (one above
all: NextCloud), but there are also many older
technologies which enable us to live the internet as a free distributed
network with no owners: I'm referring here to protocols such as HTTP,
IMAP, RSS, which I perceive to be under threat of being pushed aside in
favor of newer, more convenient, but also more oppressive solutions.
Anyway. The indieweb community is promoting the empowerment of users, by
teaching them how to regain control of their online presence: this pivots
arund having one's own domain and use self-hosted or federated solutions
as much as possible.
One of the lesser known technologies (yet widely used in the indieweb
community) is webmentions: in simple
terms, it's a way to reply to other people's blog posts by writing a
reply in your own blog, and have it shown also on the original article
you are replying to. The protocol behind this feature is an
recommendation approved by the W3C,
and it's actually one of the simplest protocol to implement. So, why not
give it a try?
I already added support for comments in my blog (statically generated
with Nikola) by deploying
Isso, a self-hosted commenting system which
can even run as a FastCGI application (hence, it can be deployed in a
shared hosting with no support for long-running processes) — so I was
looking for a solution to somehow convert webmentions into comments, in
order hot to have to deal with two different commenting systems.
As expected, there was no ready solution for this; so I sat down and
hacked up Bussator, a WSGI
application which implements a webmention receiver and publishes the
reply posts as Isso comments. The project is extensible, and Isso is only
one of the possible commenting systems; sure, at the moment it's indeed
the only one available, but there's no reason why a plugin for Static
Man, Commento, Remark or others couldn't be written. I'll happily accept
merge requests, don't be shy — or I can write it myself, if you convince me to (a nice Lego box would make me do anything 😉).
The first user of Bussator is this blog, and while the project code is
well covered by unit tests, we all know that real life is all another
matter; so please bear with me, if not everything works as it should. And
that's why I'll be thrilled to see your webmentions replies here.
We live in strange times. People are so filled with hatred and prejudices that
their brain becomes unable to parse the simplest sentences. I take this issue
to heart, because it could happen to anyone — it has happened to me before
(luckily, only in private online conversations), where an acquaintance of mine
accused me of saying things I never said. And it happens to famous people all
the time. Guys, just because you hate person X, you should not skip over parts
of their speech or suppress context in order to make it look like they said
something terrible or stupid, when they didn't.
Now it happend to Richard Stallman, with a whole wave of hateful people
accusing him of saying something that he didn't say. Let's start with the VICE
titled "Famed Computer Scientist Richard Stallman Described Epstein Victims As
'Entirely Willing'", which insists in quoting only two words out of Stallman's
Early in the thread, Stallman insists that the “most plausible scenario” is
that Epstein’s underage victims were “entirely willing” while being
Except that he didn't say that. Why not quote the whole sentence? It's not such
a long sentence, really! Just follow the link to the
which provides a complete excerpt of Stallman's words:
We can imagine many scenarios, but the most plausible scenario is that she
presented herself to him as entirely willing. Assuming she was being coerced
by Epstein, he would have had every reason to tell her to conceal that from
most of his associates.
Now, English is not my native language, but I read it well enough to understand
that “to present oneself as” and “to be” are different expressions having very
different meanings (and, in most context, actually opposite ones!). You don't
need to be Shakespeare to understand that. You only need to either stop
hating or, if you really cannot help it, at least stop projecting your
prejudices onto the people you hate. Hate makes you blind.
It's sad to see otherwise intelligent people take stupid
because of such misunderstandings.
I for one, stand in solidarity with Richard Stallman and with the English language.
(please note that this is not an endorsement of everything Stallman might have
said in the past; I don't follow him that closely, and it may be that he also
happened to say terrible things in this very thread. I'm only commenting this
very specific issue, and I know that in this very specific issue he's being
I intended to write a reply to Jos Poortvliet's blog post
“Principles”, and I
swear I did enter it as a comment to his Google-powered blog, but something
went wrong and when I tried to publish it I lost all what I'd written. So I
decided to let some hours pass, ponder a bit more over the subject, and write a
more exhaustive answer on my own blog.
Before going into the core of the topic, I want to point out that when I start
thinking over the questions posed by Jos my thought can't help jumping to the
Marxist concept of classes: the very fact that you are considering the
possibility of refusing a business because of principles means that you can
afford doing that, while most people just can't. The same applies to similar
questions, such as declining a well paying job because of ethical reasons, or
boycotting some products, eating healthy food, crossing the ocean on a clean
yacht instead of polluting the air by plane, etc.: being able to make these
choices already imply that you are in a privileged position (in some cases,
Why am I saying that? Certainly not to diminish the value of your ethical
choices! By all means, please continue to do your best to change things!
However, while you can proudly look at yourself in the mirror, please don't
look down on people who don't seem to be as responsible as you: they might
simply not have the choice, or not be able to afford it. Or maybe — that's
also possible — they are not aware that they can make this choice.
So, besides being excellent yourself, one thing you could do in order to have a
much bigger impact is to help other people get into a condition such that they
would also be able to afford to take the brave choices you go proud of.
That was a long premise indeed, but it might help to understand the rest of my
Which is: yes, I would (to a question like “Would you work with a company that
builds rockets and bombs to earn money for Nextcloud development?”). Which
might surprise many, especially those of you who know that I'm a hardcore
pacifist. In reality, my answer would be much more faceted, depending on who
you are and on the weight of your possible refusal. For example, if I were a
superstar with a million followers, then I'd definitely refuse: such a
decision, made public, would have a strong propagandistic effect. But when you
are an ordinary software developer, with a dozen friends (or even a few
hundreds) and no direct channel to the media, what would be the outcome of your
refusal? It might impress a handful of people, maybe, but the evil company
would easily find someone else to replace you and you'd lose a well paying job
(which could help you to afford making more ethical choices). But more
important than that, you would have cut out a communication channel to the
people who might benefit the most from your presence — and from your message.
I would answer “yes” because I'd like to take a chance to know what people on
the other side of the fence think. What are their reasons? Are they aware of
the issues that bother me? It's possible that I'm overestimating myself, but
even if there was a tiny, microscopic chance of instilling a doubt, of
delivering a message or providing a good example, I would leave no stone
unturned to grasp this chance. Of course, I'm not thinking of “converting” the
management of a corporation; but some of my peers inside that company might
start questioning things. And then, of course, you can always leave, when
enough is enough; but joining and then leaving a deal has a higher impact than
no joining at all. Or, if you like metaphores, in order to clean something,
you first have to get your hands dirty.
Before reading Jos's post, I've been considering another question, which is
vaguely related. Suppose that you were the owner of a bakery, and that you knew
that one of your customer is a nazi. Would you still sell bread to him? Suppose
that he's the only nazi in town: here you don't even need to worry about your
business, because even if you lost that customer, it wouldn't have but a very
minor impact on you.
My answer here is along a similar line as the previous one: yes, I would still
sell my bread to him. One reason is that this risks being another rabbit hole:
a nazi might hold the most disgusting opinions and views, but then — if you
think about it — many people do. Maybe they don't hate Jews, but Roms, Muslims,
lawyers, or the French; maybe they don't
want to colonize Africa, but Greece; maybe they don't physically torture
dissidents, but keep them rotting in a jail without charges (or with made-up
charges). Even without going to these extremes, there's simply the fact that we
are all imperfect: both in our opinions and in our actions. Would you refuse
selling bread to a guy holding nazi views, but otherwise honest and
well-behaving, while selling it to someone having well-balances opinions, but
who evades millions in taxes?
But the main reason why I'd sell my bread to a nazi is that, really, I'd like
to get to know him. I would like to learn why he holds those views, because I
think that understanding is the first step towards correction. This is probably
matter for a future post, but I'm convinced that all this censorship in the
social networks (yes, especially on the federated ones!) is detrimental to the
fight against fascism: if we won't even know where and who the fascists are,
how can we have any hopes of winning the fight?
So, let's build bridges, let's talk, let's try to understand each other's
points of view, and find exactly why we see things differently. And this is
much more effective when done at a personal level, one to one, rather than with
public big proclaims — which, more often than not, have the only effect of
polarizing the field even more.
In short — and I guess this is my answer to Jos — try to make a difference with
those who are closer to you. Accept the deal with the evil corporation, and let
everyone of your friends and colleagues know how much you are suffering because
of that. Let your peers in that company know you for what you are worth, but
don't hide your feelings. Maybe, who knows, the day you leave the deal, they
will also decide that it's time to make a big choice in their life?