This section covers development and test environment setup and configuration.
The project does not enforce the use of a specific IDE, but rather, a set of guidelines that can be configured in an IDE. As such, developers should consult the documentation for the IDE of choice for specific configuration steps.
The examples used here, if any, are either for Eclipse and IntelliJ. If you have no idea where to start, here are some instructions on how to install IntelliJ.
Importing ONOS Source
To take the best support out of your IDE, ONOS should be imported as a Maven project.
In Eclipse, this amounts to:
- navigate to File > Import > Maven > Existing Maven Projects and
- selecting the root directory of your source.
As ONOS is a multi-module project, it may appear as a collection of many (about 50 at the time of this writing) projects beginning with "onos-". This is normal for some IDEs such as Eclipse.
"Plugin execution not covered ..." errors in Eclipse
If you're using Eclipse and see "Plugin execution not covered ..." errors about jacoco-maven-plugin and onos-maven-plugin after importing ONOS projects, follow these steps to eliminate those errors.
Select one of "Plugin execution not covered..." error and select "Quick Fix"Click here to expand...
Select "Mark the goal as ignored in Eclipse build in Eclipse preference" as the fix and "Finish" to apply the fix.Click here to expand...
Select one of the ONOS related project to open the "Update Project" dialog, then "Select All" projects and update all the projects.Click here to expand...
It may take a while for Eclipse to rebuild all the project after refreshing project configuration.
By following the steps above, maven goal resolution errors for the same goal should disappear. (jacoco-maven-plugin). Repeat the same step for remaining goal error. (onos-maven-plugin)Click here to expand...
The formatting followed by the project are:
- Indentation using four spaces
- No trailing whitespaces, including in empty lines
- Spaces after keywords such as
while, and casts
The whitespace formatting, among other code styling, is enforced via Checkstyle, which is run against the code during each Maven build. The build will fail if formatting violations are found.
The full guidelines are found in the Code Style Guidelines.
Prior to contributing code to ONOS, all developers should set-up their IDE to appropriately tag the code with the Apache 2 license header text. The bare text is checked in under tools/dev/header.txt, and the original can be found at:
Example: Copyright setup on IntelliJ
First make sure that you have the Copyright plugin enabled. Then, under Preferences, select Copyright section and create a new Copyright profile, call it something like Apache 2, and prime it with the text above, without any decorations. Then configure your copyright formatting options as shown:
Example: Copyright setup on Eclipse
Configure the Comments for Files similar to the following.
Remember to put a check on "Automatically add comments for new methods and types" to apply these templates on new files.
Building API Docs
To build a local set of the ONOS Java API documentation bundle, use the
onos-build-docs utility, which uses Maven to generate both internal and external documentation.
onos-build-docs from any location generates HTML pages under ONOS_ROOT/docs/, and can be accessed by pointing a browser to ONOS_ROOT/docs/target/site/apidocs/index.html .
The generated documentation is also wrapped into a gzipped tar archive and placed under /tmp with the naming convention onos-apidocs-<onos-version>.<user>.tar.gz.