openHAB 2 Add-ons

This repository contains the official set of add-ons that are implemented on top of openHAB 2 Core APIs. Add-ons that got accepted in here will be maintained (e.g. adapted to new core APIs) by the openHAB 2 maintainers.

To get started with binding development, follow our guidelines and tutorials over at https://www.openhab.org/docs/developer/.

If you are interested in openHAB 2 Core development, we invite you to come by on https://github.com/openhab/openhab-core.

Add-ons in other repositories

Some add-ons are not in this repository, but still part of the official openHAB 2 distribution. An incomplete list of other repositories follows below:

• https://github.com/openhab/org.openhab.binding.zwave
• https://github.com/openhab/org.openhab.binding.zigbee
• https://github.com/openhab/openhab-webui

Development / Repository Organisation

openHAB 2 add-ons are Java .jar files.

The openHAB 2 build system is based on maven. The official IDE (Integrated development environment) is Eclipse.

You find the following repository structure:

.
+-- bom      Maven buildsystem: Bill of materials
|   +-- openhab-addons  Lists all extensions for other repos to reference them
|   +-- ...             Other boms
|
+-- bundles  Official openHAB extensions
|   +-- org.openhab.binding.airquality
|   +-- org.openhab.binding.astro
|   +-- ...
|
+-- features/karaf  An extension usually has dependencies (at least openHAB core).
|            |      In those feature files are the dependencies for the OSGi container declared.
|            +-- openhab-addons-external/src/main/feature/feature.xml
|            +-- openhab-addons/src/main/feature/feature.xml
|
+-- itests   Integration tests. Those tests require parts of the framework to run.
|   +-- org.openhab.binding.astro.tests
|   +-- org.openhab.binding.avmfritz.tests
|   +-- ...
|
+-- poms     Maven buildsystem files
+-- src/etc  Auxilary buildsystem files: The license header for automatic checks for example
+-- tools    Static code analyser instructions
|
+-- CODEOWNERS  This file assigns people to directories so that they are informed if a pull-request
                would modify that directory/binding.

Command line build

To build all add-ons from the command-line, type in:

mvn clean install

Optionally you can skip tests (-DskipTests) or skip some static analysis (-DskipChecks) this does improve the build time but could hide problems in your code. For binding development you want to run that command without skipping checks and tests.

Subsequent calls can include the -o for offline as in: mvn clean install -DskipChecks -o which will be a bit faster.

For integration tests you might need to run: mvn clean install -DwithResolver -DskipChecks.

How to develop in the Eclipse IDE

1. Install Bndtools in your Eclipse IDE. (Is automatically installed if you have used the Eclipse Installer for openHAB development as described here: https://www.openhab.org/docs/developer/development/ide.html)
2. Checkout the bnd based openHAB demo application: git clone --depth=1 https://github.com/maggu2810/openhab-demo.
3. Open the directory in Eclipse. Wait for the download and build to finish (about 3-5 minutes).
4. Checkout this repository: git clone --depth=1 https://github.com/openhab/openhab2-addons
5. In Eclipse File->Import->"Existing maven projects": Add the binding that you want to develop on to the workspace.
6. In Eclipse Package Explorer: Search for pom.xml in the demo-app project. Add your addon as maven dependency like so (replace astro!):

   <project ...>
     ...
     <dependencies>
        <dependency>
            <groupId>org.openhab.addons.bundles</groupId>
            <artifactId>org.openhab.binding.astro</artifactId>
            <version>${project.version}</version>
            <scope>runtime</scope>
        </dependency>
     </dependencies>
   </project>

7. In Eclipse Package Explorer: Search for app.bndrun in the "demo-app" project. Double click (takes a few seconds).
8. Add your project to "Run requirements" via drag&drop from the Package Explorer.
9. Execute with "Run OSGi"

The demo application runs a slim set of openHAB core bundles including automations (next gen rules) and PaperUI. The startup should only take about 5 seconds and you are greeted by the openHAB console where you can type in console commands.

Happy coding!