Building nymea

This section assumes that the build environment has already been set up. Please refer to the previous section if the build environment has not been set up yet.

Depending on the need, nymea can be built using a graphical IDE or via command line. If the purpose of building nymea from source is to install nymea on a new system, or do only small modifications like applying patches, building via the command line might be the better choice. A developer changing the code will most likely want to use QtCreator as it offers code completion, inline documentation and all the other features that are expected from an IDE.

Building natively

The nymea source code can be obtained from GitHub. There is a range of repositories. Depending on the need, only a selection of those repositories might be checked out.

If the entire nymea stack is to be built from source, all those repositories are required.

If only individual parts are to be built from source, each individual repository can be built individually and the others uses from the nymea. After following the instructions for setting up the build environment all parts should be available as binary form on the development machine already.

Each module supports different build configurations. In order to activate those, append the given option to the qmake line. For example: qmake .. PREFIX=/usr CONFIG+=release.

nymea-gpio

git clone https://github.com/nymea/nymea-gpio
mkdir nymea-gpio/builddir
cd nymea-gpio/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug

libnymea-networkmanager

git clone https://github.com/nymea/libnymea-networkmanager
mkdir libnymea-networkmanager/builddir
cd libnymea-networkmanager/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug

nymea-networkmanager

git clone https://github.com/nymea/nymea-networkmanager
mkdir nymea-networkmanager/builddir
cd nymea-networkmanager/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug

nymea-remoteproxyclient

git clone https://github.com/nymea/nymea-remoteproxyclient
mkdir nymea-remoteproxyclient/builddir
cd nymea-remoteproxyclient/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug

nymea-mqtt

git clone https://github.com/nymea/nymea-mqtt
mkdir nymea-mqtt/builddir
cd nymea-mqtt/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug

nymea

git clone https://github.com/nymea/nymea
mkdir nymea/builddir
cd nymea/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug
build without tests: CONFIG+=disabletesting
enable code coverage reporting for tests: CONFIG+=coverage

nymea-plugins

git clone https://github.com/nymea/nymea-plugins
mkdir nymea-plugins/builddir
cd nymea-plugins/builddir
qmake .. PREFIX=/usr/
make
sudo make install

This module supports the following build configurations:

debug: CONFIG+=debug
release: CONFIG+=debug
build individual plugins only: CONFIG+=selection
select a plugin to be built: PLUGINS+=pluginname (requires CONFIG+=selection, can be given multiple times)

Cross-compiling

In order to build debian packages for nymea for your target device, we provide a tool for crosscompiling called crosscompiler. This tool makes helps to build a debian package inside a lxd container which can makes sure all required packages for building and deploying are available and also for different architectures.

The crossbuilder tool can be started within a git source code repository and generates a brand new lxc container for the given distribution and architecture.

Installation

Install the crossbuilder package from the nymea repositoy (see install section):

$ sudo apt-get install crossbuilder

Setup

In order to set up the crossbuilder lxd environment you can run following command and follow the setup instructions:

$ crossbuilder setup-lxd

Building

Assuming you are running crossbuilder on a amd64 Ubuntu machine, and you want to build a project for armhf debian stretch you can do following steps.

You clone a project repository (in this example the nymea project) and change to the project directory:

$ git clone https://github.com/nymea/nymea.git
$ cd nymea

If you run the crossbuilder the first time, we need to specify the architecture and the distribution we want to build packages for:

$ crossbuilder -a armhf -u stretch

Crossbuilder will now contact the nymea lxc host server (https://jenkins.nymea.io:8443) and check if the available image for crosscompilation exists for the target achitecture and distribution (stretch armhf). If the image was found, a new local lxc container will be created for exactly this repository.

The next step for crossbuilder is mounting the current source directory into the new created container and will start building the packages (containing build dependencies installing). If you change the source code and want to run the build process again, crossbuilder will reuse this container and also the already created build outputs. If you change the build dependencies of the package you don’t need to rebuild the container, you just need to run following command in order to install the missing build dependencies inside the container:

$ crossbuilder dependencies

You can check any time which containers you already have and which are running on your local build machine:

$ lxc list

+--------------------------------------------------------+---------+-------------------+------+------------+-----------+
|                          NAME                          |  STATE  |       IPV4        | IPV6 |    TYPE    | SNAPSHOTS |
+--------------------------------------------------------+---------+-------------------+------+------------+-----------+
| nymea-nymea-builder-stretch-amd64-armhf                | RUNNING | 10.0.1.106 (eth0) |      | PERSISTENT | 0         |
+--------------------------------------------------------+---------+-------------------+------+------------+-----------+

Her you can see the created container for building nymea. The naming of the container is <project>-nymea-builder-<distribution>-<host-architecture>-<target-architecture>.

Cleaning the build

Once the crossbuilder has finished, you can find all build results in the source tree (since the packages where created in the mounted source tree). If you want to clean up the source directory again you can run:

$ crossbuilder clean

Build output

A compressed file containing the debian packages and also the source packages will be the output of script. You can take a look at the built packages by extracting the file and check the content:

$ tar xfv debs_*

libnymea1_0.9.0+201803271733~c348a6b~stretch_armhf.deb
libnymea1-dev_0.9.0+201803271733~c348a6b~stretch_armhf.deb
nymea_0.9.0+201803271733~c348a6b~stretch_armhf.deb
nymead_0.9.0+201803271733~c348a6b~stretch_armhf.deb
nymea-dbg_0.9.0+201803271733~c348a6b~stretch_armhf.deb
nymea-tests_0.9.0+201803271733~c348a6b~stretch_armhf.deb
nymea-translations_0.9.0+201803271733~c348a6b~stretch_all.deb
source_repository/nymea_0.9.0+201803271733~c348a6b~stretch.dsc
source_repository/nymea_0.9.0+201803271733~c348a6b~stretch_source.changes
source_repository/nymea_0.9.0+201803271733~c348a6b~stretch.tar.xz

The content will be extracted in the source directory. If you want to see the content of the resulting packages you can use the dpkg command:

$ dpkg -c libnymea1_0.9.0+201803271733~c348a6b~stretch_armhf.deb

drwxr-xr-x root/root         0 2018-03-27 17:36 ./
drwxr-xr-x root/root         0 2018-03-27 17:36 ./usr/
drwxr-xr-x root/root         0 2018-03-27 17:36 ./usr/lib/
drwxr-xr-x root/root         0 2018-03-27 17:36 ./usr/lib/arm-linux-gnueabihf/
-rw-r--r-- root/root    539272 2018-03-27 17:36 ./usr/lib/arm-linux-gnueabihf/libnymea.so.1.0.0
drwxr-xr-x root/root         0 2018-03-27 17:36 ./usr/share/
drwxr-xr-x root/root         0 2018-03-27 17:36 ./usr/share/doc/
drwxr-xr-x root/root         0 2018-03-27 17:36 ./usr/share/doc/libnymea1/
-rw-r--r-- root/root      1436 2018-03-27 17:36 ./usr/share/doc/libnymea1/changelog.gz
-rw-r--r-- root/root      1942 2018-03-27 17:30 ./usr/share/doc/libnymea1/copyright
lrwxrwxrwx root/root         0 2018-03-27 17:36 ./usr/lib/arm-linux-gnueabihf/libnymea.so.1 -> libnymea.so.1.0.0
lrwxrwxrwx root/root         0 2018-03-27 17:36 ./usr/lib/arm-linux-gnueabihf/libnymea.so.1.0 -> libnymea.so.1.0.0

If you want to login into the build container you can simply run:

$ crossbuilder shell

Cache

If you run the crossbuilder a second time, you just need to run crossbuilder, since the first time a configuration file for the container has been created. Crossbuilder will also make use of the host ccache independent form the architecture and distribution. In this example you can find the crossbuilder cached information here:

$ cat .crossbuilder/cache.conf

TARGET_ARCH=armhf
TARGET_UBUNTU=stretch

Delete the container

If you are finished and the container will not be needed any more you can delete the container by running:

$ crossbuilder delete

Deploy on target machine

If you want crossbuilder to deploy the packages to a remote machine and install them, you can create following configuration file:

$ nano .crossbuilder/deploy.conf

Here you can add the remote information of the target machine (in this example an armhf stretch machine running on 10.10.10.10 where you want to install the debian packages built with the crosscompiler.

Note: the packages need to be already installed once on the target machine, since crossbuilder is just updating them, not installing them from scretch. If that is not the case, you can install them manually after crossbuilder copied them to the target and created the local repository: on the target sudo dpkg -i /tmp/repo/*.deb.

DEPLOY_IP=10.10.10.10
DEPLOY_USER=nymea
DEPLOY_KEY=~/.ssh/id_rsa

Each new build will from now on be installed automatically on the target machine until you delete the configuration file.

Interacting with the containers

Remove a container if the source repositoy does not exist any more:

Note: the --force is only needed if the container is still running.

$ lxc list

+--------------------------------------------------------+---------+-------------------+------+------------+-----------+
|                          NAME                          |  STATE  |       IPV4        | IPV6 |    TYPE    | SNAPSHOTS |
+--------------------------------------------------------+---------+-------------------+------+------------+-----------+
| nymea-nymea-builder-stretch-amd64-armhf                | RUNNING | 10.0.1.106 (eth0) |      | PERSISTENT | 0         |
+--------------------------------------------------------+---------+-------------------+------+------------+-----------+

$ lxc delete nymea-nymea-builder-stretch-amd64-armhf --force

Building with Yocto

nymea can be built with yocto. For that, we offer a meta layer which can be found on GitHub.

This meta layer can be added to a yocto image and offers the following packages:

nymea-mqtt
nymea-networkmanager
nymea-remoteproxy
nymea-gpio
nymead
nymea-plugins