What does the “leak period” mean in sonarQube?

Shortly, leak period is time frame (usually since last release), where specified criteria are measured on newly added code. This allows to focus on quality of fresh code and stop the accumulation of technical debt. The “leak” concept is explained in documentation here https://docs.sonarqube.org/display/SONAR/Fixing+the+Water+Leak Update SonarSource has fleshed-out and updated the terminology / philosophy: https://sonarqube.org/features/clean-as-you-code.

SonarQube Runner vs Scanner

Answer is very simple: “Runner” is the old name for “Scanner”. Everything you need to know about the different SonarQube Scanners is available on the Scanners part of the official documentation. If you’re stuck to Java 7, then you can use: SonarQube Runner (sonar-runner) up to version 5.5 of SonarQube SonarQube Scanner (sonar-scanner) 2.6.1

How do I use, or set up sonar-project.properties file?

Here are some resources to get you started https://www.wrightfully.com/setting-up-sonar-analysis-for-c-projects/ – See Step 6: The sonar-project.properties file. https://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner There are also some sample projects on github, you can refer to the project.properties files there as well, https://github.com/SonarSource/sonar-scanning-examples

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