SonarQube: Check if a project with the same key already exists while first analysis/build

Question

I am building my projects with Jenkins and analyze them with SonarQube.

The problem I am trying to fix without writting my own Plugin is the following:

• 1.) Jenkins starts a build of a new project (never built or analyzed an SonarQube before)
• 2.) SonarQube analysis is triggered
• 3.) SonarQube shell check if a project with the same key already exists
• 4a.) If it already exists: Abort analysis and throw error message
• 4b.) If it not exist: Continue the analysis as a normal analysis

Or in other words: If a Project is analyzed for the first time, I want SonarQube to make sure that there is no other project already existing with the same key this new project uses. The goal is to avoid overwritting existing projects by a complete other project If a project has been already analyized and the new analysis would be a like "updating the old results" i don't want any error message to show up.

Can i simply install a plugin? Must i change things within the pom.xml? Is there a way? And if yes: how does it work?

(I know the possibility to get the buildnumber of the last successful build in Jenkins. And if it would be greater or equal 1 there would be no reason for my check anymore. If it's not: i need my check)

Thanks for your help :)

Answer 1

You can use the /api/resources?resource=project-key Web Service from a script to check if the given project key already exists (if not, the WS will answer with a 404).

However, as @andre-stannek said: in the end it is your responsibility to make sure that 2 projects don't use the same key. There is no way for SQ to know if the analyzed project is an update of an existing project or not.