This is a proof of concept for an Ubuntu SDK GMail app using Go QML. It is based on my Go QML Ubuntu SDK template. It includes scripts to set up and configure a click chroot to allow armhf cross-compilation.
I won't have enough time to work on this project myself but I really hope that my code will eventually be useful to someone who decides to create a native fully-fledged GMail application. If you do, I would be very thankful if you tell me about your client. :)
First of all, you need to install the Ubuntu SDK as described in the official documentation: http://developer.ubuntu.com/start/ubuntu-sdk/installing-the-sdk/
In order to be able to compile the template on your PC, you also need to install a few more packages by running the following command:
sudo apt-get install golang g++ qtdeclarative5-dev qtbase5-private-dev qtdeclarative5-private-dev libqt5opengl5-dev qtdeclarative5-qtquick2-plugin mercurial
Now it comes to setting up the chroot. Clone the git repository and run the chroot setup scripts using the following commands:
git clone https://github.com/nikwen/ubuntu-gmail-app.git
cd ubuntu-gmail-app
chroot-scripts/setup-chroot.sh
Note that it is important to call the setup-chroot.sh script from the top-level project directory.
These commands will create a new click chroot or update an already existing one with the required build dependencies. Afterwards, it will install version 1.3.3 of Go inside the project directory, as it is required for cross-compiling the Go QML package. (Don't worry. The system will not use this one by default. Other projects will still use the golang package installed via apt-get install golang.)
In order to run this application you will need to get a GMail API key.
When signing up for it, choose Web application as the application type and enter https://wiki.ubuntu.com as your redirection URI.
Then paste your Client ID and your Client Secret into their respective locations in the ubuntu-gmail-app.service file.
Running the project on your PC is quite simple. You can either run it from Qt Creator or use the run.sh script, which invokes build.sh for building.
If you want to install the project on your Ubuntu Phone, you just need to run the install-on-device.sh script. It will build the project using the build-in-chroot.sh script, push the generated click package to your device using adb and install it using pkcon install-local.
This software is released under the ISC license, a simple and permissive one which allows you to reuse this code in free and paid software projects alike, without the need to share your source code. I would be very pleased if you add a link to this project to your "About" page and/or let me know that someone is actually using it, but it is, of course, no requirement to do so.
https://code.google.com/p/google-api-go-client/source/browse/examples/gmail.go https://code.google.com/p/google-api-go-client/source/browse/gmail/v1/gmail-gen.go https://developers.google.com/gmail/api/v1/reference/
- Dimitri John Ledkov for publishing a great blog post on Go cross-compilation using Ubuntu click chroots. Thank you very, very much for getting me started!