I wrote a question on the OpenCV forum and got an amazingly comprehensive and useful answer from pklab.
It’s extraordinary how he (or she) has immersed themselves into the project of solving my problem. I’m humbled.
At the risk of being discursive I think behind this is the question of why the Android Studio / Gradle experience is so bad.
Typical Clojure experience :
* download project with dependencies listed in project.clj.
* Leiningen gets the dependencies thanks to Clojars and Maven.
* Project compiles.
Typical Android Studio / Gradle experience :
* “Import my Eclipse project”.
* OK project imported.
* Gradle is doing it’s thang … wait … wait … wait … Gradle has finished.
* Compile … can’t compile because I don’t know what an X is / can’t find Y library.
I’m not sure this is Gradle’s fault exactly. But the “import from Eclipse project” seems pretty flaky. For all of Gradle’s alleged sophistication and the virtues of a build-system, Android Studio just doesn’t seem to import the build dependencies or build-process from Eclipse very well.
It doesn’t tell you when it’s failed to import a complete dependency graph. The Android Studio gives no useful help or tips as to how to solve the problem. It doesn’t tell you where you can manually look in the Eclipse folders. It doesn’t tell you which library seems to be missing. Or help you search Maven etc. for them.
In 2016 things like Leiningen / Clojars, or node’s npm, or Python’s pip, or the Debian apkg (and I’m sure many similar package managers for other languages and systems) all work beautifully … missing dependencies are thing of the past.
Except with Android. Android Studio is now the only place where I still seem to experience missing-dependency hell.
I’m inclined to say this is Google’s fault. They broke the Android ecosystem (and thousands of existing Android projects / online tutorials) when they cavalierly decided to shift from Eclipse to Android Studio / Gradle without producing a robust conversion process. People whose projects work in Eclipse aren’t adapting them to AS (presumably because it’s a pain for them). And people trying to use those projects in AS are hitting the same issues.
And anyway, if Gradle is this super-powerful build system, why am I still managing a whole lot of other dependencies in the sdk manager? Why can’t a project that needs, say, the ndk specify this in its Gradle file so that it gets automatically installed and built-against when needed? Why is NDK special? Similarly for target platforms? Why am I installing them explicitly in the IDE rather than just checking my project against them and having this all sorted for me behind the scenes?
Which is, er, very true. And wonderful.
But this haunts me continuously, as I explore the Mind Traffic Geometry of tools that support me tracking tasks and outlining ideas.
Will I one day end up simply falling into Emacs Org Mode? Isn’t that basically everything I really want?
Am I wasting my time with quixotic effort of writing my own software for this stuff when I could be writing something newer and more important?
Another thing that’s pushing me to think about this : this week I’ve been playing with Faust. A wonderful language for writing signal processing networks (ie. synthesizers, audio FX etc.) that compiles to multiple back-ends … including PureData, Supercollider, VST plugins and stand-alone programs.
It’s basically where I imagined Gates of Dawn eventually going.
But rather than a Python library, its a very nice “little-language”, with great operators for describing composition of data-flow blocks. It’s well developed and supported. I’m trying it out for writing small synths / FX units I can run on small boards like CHIP and Raspberry Pi.
I can see myself doing a lot with this. But it’s basically going to kill Gates of Dawn. Maybe there’s room for a Python library for those who don’t want to learn Faust. But for me, Faust is looking extremely viable.
So … another wasted project?
Perhaps I need to look at this positively. I’m not old. But I’m not as young as I used to be. I don’t have so many projects left ahead that I can afford to squander them. Perhaps its time to pivot. Time for a cull. A “spring-clean”. To remove some more cruft projects that occupy too much of my mind, but are actually just weak “me-too” versions of existing things that I would use perfectly happily if I made the effort to learn them. Enough with the Not Invented Here syndrome.
I’m not saying that OWL or MTC are going anywhere yet. I use them, and they work for me. And they are DIFFERENT from OrgMode, or todo.txt or any similar thing out there. They are what I want.
But I need to embrace this change. There are so many exciting NEW opportunities, there’s no point getting hung up on the old stuff.
Dawn is over. For me it’s 2PM. And there’s plenty of work to be done.
OK. So someone has made a Pocket-style Raspberry Pi case.
Very nice. Hope someone starts commercializing these as I think they’ll be very important for the RasPi ecosystem. mobipre2 shared on YouTube: Raspberry Pi – Pocket Chip
You all probably knew where this was going, right?
Of course, it’s been my priority to run the new MTC on the PocketCHIP. And it runs fine, without any special conversion; just needed to figure out how to install a library it depended on without going through drracket.
Now I’m off for my celebratory bike ride. 🙂
Got my PocketCHIP yesterday.
And here it is running Emacs, with a Racket REPL via Geiser.
I have to say, this has been the dream for a long time … a cheap, portable device that runs Linux, has Emacs, git, rsync etc. And I can actually write and run Lisp on it.
It has a keyboard / screen that can be used in emergencies, but can also be accessed via USB-serial and PuTTY from any old Windows PC. (Useful when you want to go somewhere which may have a PC but don’t want to take a laptop with you.)
I’ve been excited by small computers before. I do stuff with Arduinos. I have a couple of Raspberry Pis sitting around. And last year got very enthused by the possibilities of the ESP8266 running nodemcu.
But in reality, the RaspPi and ESP have both proven more awkward to work / play with than the CHIP.
The RaspPi’s problem is its dependency on HDMI. And lack of ability to log in by serial over USB. I don’t usually have an HDMI screen to hand. And not in the same room as a network router I can connect an ethernet cable to. And without one, plus special keyboard / mouse etc. And wired internet connection, it’s hard to do much with the RaspPi. I normally only use it in the local hackspace.
The ESP8266’s issue is dependency on a 3.3v power-supply. Which is awkward. Even with an FTDI cable to connect it to the computer’s USB port, you need EXTRA power of the right voltage to talk to it. I have to use a spare Arduino, just to get that 3.3v power.
It kind of pains me to say it, as I really want to champion the British innovated Pi over the American innovated CHIP, but the CHIP guys have done a magnificent job of making their board easy to use straight out of the box. The PocketCHIP is a master-stroke. I unboxed it, plugged it into a USB charger, switched it on, and was exploring and playing with the CHIP within a couple of minutes. It combines all the extra gubbins you need to do stuff with the CHIP in one, obviously cheap, but pretty usable, package. Even the keyboard is OK for small bursts of typing.
I got a PocketCHIP and two extra CHIPs. Even without the Pocket, being able to communicate with a bare CHIP via a terminal over USB makes it far more accessible than the RaspPi. Once I’d figured out a terminal program (I found cu works well) I was able to log in, set up the wifi, update and upgrade the Debian and install the software I want to play with, without any hardware beyond the USB cable.
I really hope someone comes up with a Pocket equivalent for the Raspberry Pi Zero soon. It makes a massive difference to adoptability. And I don’t really understand why the Raspberry Pi can’t be accessed over serial. It’s got USB sockets. Why can’t we do serial over them? Save Save
Fixed a minor, but annoying, bug in MTC Racket today.
There’s an option, when you have a URL in an item, to get MTC to pull it and show the “title” of the page that the URL is pointing out. It’s a quick reminder of what the page is about without opening up the browser (when it’s not obvious from the link itself). You do this simply by typing “a” (for “analyze”).
However, if you typed that in an item without a URL, MTC was blowing up. That is now fixed.