Posts Tagged ‘Python’

Titanium Mobile hack: execute your projects from the command line using Make

Wednesday, April 6th, 2011

Appcelerator’s Titanium Mobile is a nice platform to develop native iOS (and Android) applications using JavaScript. Unlike other platforms that provide only a web container to run web applications that pretend to be native, Titanium translates JavaScript code into native applications that look and behave like they were written in Objective-C.

To run Titanium applications you need to use Titanium Developer. This program executes a bunch of scripts to compile your projects using Xcode, starts the application in iOS simulator and so on. Fortunately Titanium is open sourced on Github, and while reading its code I had an idea that would make me feel much more comfortable about running my Titanium applications. If you are a “command-liner” like me, you probably will prefer to execute your applications from your shell using Makefiles, and that’s what my hack is all about.

The first thing I did was to understand how Titanium starts its projects and write a command-line script that replicates this behavior. Titanium uses a script called builder.py to do all the magic, and I wrote a simple wrapper script called titanium.sh that uses builder.py to compile and start the application:

You will notice in the script source that I read some data (the application name and ID) from tiapp.xml. This is the file used by Titanium to store projects’ metadata. if you want to use this script in your projects, it’s important to change the tiapp.xml path according to your project structure. My projects usually have a structure like this:

/bin (directory)
    titanium.sh
/SampleApp (directory)
Makefile

… where:

  • bin is the directory where I put titanium.sh and other utility scripts.
  • SampleApp is the directory where my application lives (this directory has the same name of my application).
  • Makefile lives in the root directory.

If you use this same project structure, your tiapp.xml file will be located at /SampleApp/tiapp.xml. In this case, just copy my script and it will work for you too.

You can also configure Titanium and iOS SDK versions that will be used to compile. Just change the values of *_SDK_VERSION variables to the versions you have installed in your computer. Some variables (like PROJECT_NAME) are parameters that will be passed when the script is called (in our case, this will be informed by the Makefile).

One last thing about titanium.sh is that I use some Perl “black magic” at the end of the script to produce beautiful colored output depending on the log type (info, debug, error, etc.) – just like Titanium Developer does:

After that, you will just need a simple Makefile that will allow you to start the application by simply typing “make run” at the command line:

The Makefile is responsible for calling titanium.sh passing all the necessary variables. Just copy my Makefile to your project root, change the PROJECT_NAME variable and you are good to go!

If you want to take a look on how I use these scripts in my projects, take a look at titanium-jasmine on GitHub. You will notice in this project that you can do a lot of other fancy stuff using Make.

Coding Dojo SP @ Yahoo! Brazil

Friday, August 6th, 2010

Last Friday (July 30th) we hosted at Yahoo! Brazil‘s office our first Coding Dojo SP group meeting!

Coding Dojo @ Yahoo!

The meeting was really cool and very crowded. :) We had a Randori session with around 30 developers to solve the “write numbers to words” problem using Python (thanks to the influence of our Pythonist friend “rbp“, that led the Dojo session).

I just finished writing a post on Yahoo! Developer Network’s blog explaining in more details how the meeting was (and what the heck a Coding Dojo is). You can also see some pictures on my Flickr page.

The next meeting will be next week (we still have to define the date). Subscribe to the group’s mailing list to be notified about the next meetings.

See you next time here in the office! ;)

Dev in Rio 2009, a great software development conference in Rio de Janeiro!

Friday, December 4th, 2009

Even though it was conceived, planned and executed in a little bit more than 20 days, Dev in Rio 2009 was awesome, a huge success! We had around 400 people at the SulAmerica Conventions Center in my home town Rio de Janeiro talking about software development, programming at the Coding Dojo and having a lot of fun in a whole day of presentations that ended in the biggest #Horaextra ever. “Hora extra” (which means “Overtime”) is the name of our weekly meeting where the nerds hang out together to drink and have a nice chat about geek stuff.

Dev Rio in 2009 started at the scheduled time when me and my friend Henrique Bastos (the creators of the conference) opened the event with a quick presentation and thanking our sponsors, supporters, communities and friends who helped us a lot more than you can imagine.

Dev in Rio 2009 - Abertura
* Henrique Bastos and me at the Dev in Rio opening.

To begin the day, we started the two tracks of Dev in Rio 2009. At the main auditorium we had the scheduled lectures while in the foyer we had the Coding Dojo.

Coding Dojo is a programming arena that was organized by the Dojo Rio folks in partnership with Dojo@SP. The idea is to work on simple and novelty problems, using programming techniques like Test-Driven Development and SOLID principles. This was definitely the best surprise we had in the day – the Dojo went much better than we could ever imagine (except that the Java Dojo wasn’t much popular, I have to admit).

Dev in Rio 2009 - Coding Dojo
* Coding Dojo at Dev in Rio: 3 meters of code on the wall!

Dev in Rio 2009 - Coding Dojo
* People participating at Dev in Rio’s Coding Dojo.

The first talk of the day was given by Ryan Ozymek, that entered the stage with his famous penguin to talk about his experience with open source software and the Joomla! community. He detailed how a big software development community works and gave his entrepreneur vision about how to use open source software to leverage businesses.

After that, Guilherme Silveira and Nico Steppat talked about a very controversial theme: Is Java dead? They addressed the fact that there are many things beyond the language in the Java universe and that despite the language is “expiring” the JVM can still be very useful.

After lunch, Fabio Akita gave no respite for anyone who was sleepy and did an excellent presentation on the Ruby on Rails ecosystem, with excellent videos, screen casts and quite information beyond the code. He doesn’t know but he took away the breath of the simultaneous translation girls!

Continuing, the (almost carioca) Jacob Kaplan-Moss made his presentation on Django, that he calls “the web framework for perfectionists with deadlines”, developed in Python. He spoke about the concepts and values that guided the development of the project and showed a bit of code to give the audience an idea of how to use the basics of Django.

The last presentation of the day was given by Jeff Patton, that talked about product development with Agile methods. Using as a narrative the story of a project carried out in conjunction with Obie Fernandez, several common problems in software development (and their solutions) have been addressed.

In the end, our great friend Vinicius Manhães Teles led an interesting conversation between speakers, communities and the audience. We had the impression that if we didn’t control the time, the conversation would have taken hours and hours because there were a lot of interesting subjects and questions. The audience took a great deal and we had interesting topics like entrepreneurship and controversial as the stupid regulation law of the systems analyst profession proposed by the Brazilian government (in Portuguese only).

Dev in Rio 2009 - Discussion
* Discussion led by Vinicius Teles. And before anybody asks, no, that one on the picture is not Adam Savage from MythBusters, it’s Jeff Patton.

While all these things were happening, me, Henrique, Gustavo Guanabara and Flavia Freire (Arteccom‘s journalist) spent the day recording a huge podcast of the event, interviewing staff and filming the scenes. We have talked with the speakers, sponsors and attendees about all the subjects addressed on the talks! Watch the “making of” of some Podcasts with Ryan Ozimek, with Guilherme and Paulo Silveira and with Fabio Akita and Marcos Tapajós.

Dev in Rio 2009 - Podcast recording
* Guanabara recording the Podcast with Fabio Akita and Marcos Tapajós (and a neat detail: Guilherme Silveira and Paulo Silveira doing Pair Programming just behind them).

Since the event was realized on a monday, we ended the conference inviting everybody (with the “Estamos todos bêbados” song from Matanza in the background and choreography by Sylvestre Mergulhão and Henrique Andrade) for an epic edition of #Horaextra (that means “Overtime”, our weekly social meeting) at Lapa 40º. The entrance was free to everybody that had the Dev in Rio 2009 badge and that was how we realized the biggest and best #Horaextra ever:


* Watch more Dev in Rio 2009 videos.

I’m sure that this simple blog post cannot tell even 0,001% of what Dev in Rio 2009 was and how happy I am for being able to make it. I’d like to thank again the fundamental support from the folks of Globo.com that was the main responsible for making it happen, our sponsors Caelum, Locaweb and D-Click and everybody else that have supported us some way: Associação PythonBrasil, Fábrica Livre, Myfreecomm, OpenSourceMatters, Arteccom, DojoRio, Dojo@SP, #Horaextra, PythOnRio, RioJUG, RubyInside Brasil, Guanabara.info and everybody that attended to Dev in Rio 2009. Without your support nothing would’ve been possible!

Dev in Rio 2009 - Everybody in the end
* Participants of Dev in Rio’s round table.

If you didn’t go to Dev in Rio, I have two things to tell you: (1) you did lose one of the best conferences in Rio ever but (2) we’re going to make the presentation videos available very soon to alleviate your pain. :)

See you in 2010!

Open source: “I don’t use open sorce software because I want support”

Wednesday, April 1st, 2009

“I don’t use open sorce software because I want support. I want to pay for it, so I can have support if I need.” That’s what a lot of people say about free and open source software. But today I came to a really interesting situation that it’s interesting to share.

We were configuring a continuous integration server at my team for a new project and we decided to use Integrity – that is a very simple yet powerful and beautiful tool. Our goal was really really simple: run tests, deploy the application and run more (acceptance) tests. Then we came to a situation where the tests were not running and the reason was somewhat bizarre. Integrity was opening a subshell to execute our build (and that’s very fair), but the problem is that Python‘s sys.stdout was showing an Unicode error, because the test reports have a lot of accents. For some strange reason the very same code that was working in our shells was aborting with an Exception when executed in a subshell.

Given that complex situation, I decided to go to the website’s FAQ to see if somebody had this kind of problem before. I thought that maybe some configuration or environment variables setup could easily solve my problem. After some minutes of browsing I found instructions to configure Passenger user switching to overcome this problem, but I got no success.

Then, very frustrated, I decided to take a look in the documentation again and this time I saw a link to “support”, that pointed me to an IRC channel.

In five minutes I was talking to 2 commiters of the project and was having a high level discussion about the problem, the causes and the possible workarounds. The best part was that it took exactly 30 seconds for them to understand what I was talking about and they immediately started pointing me to solutions and asking me to try things… Thank to the guys’ tips (and Google) I could solve the problem in the end.

If you don’t like open source software because of the support, then I would like to ask you: in what reality do you live? Do you prefer to talk about “subshells” and “environment variables” with some call center attendant or do you want to talk to the people that can really help you solve your problem?

In other situation I was working at a company that used a VoIP telephony equipment that only worked on Windows. I wanted so much to use my preferred Linux distro, but that would mean that I couldn’t have a telephone. So, since we had a gold support plan (because we had a lot of PBXs with almost 200 branches), I decided to call the company and ask why they didn’t have a Linux version. I also tried to propose to or account manager: “we can implement that for you, just give us the Windows source code or protocol spec that we will implement everything for you and give you the source code and all the rights for free”. That was 6 years ago and they still don’t have a Linux version of the software….

Then I want to ask again: do you want to pray for your vendor to implement the solutions that are important to you or do you want to have the power to do it yourself when you need?

Think about these things. In the great majority of the times I asked for support in open source projects they were infinite times better than any paid support I’ve ever had!