For Checkstyle project I decided to use coveralls.io service to show UTs coverage as banner.
I used that instruction to make it for java maven project. Amazing documentation with example description worked fire for simple projects(sevntu.checkstyle , dsm-maven-plugin).
But For Checkstyle I had an error:
[romani]$ mvn jacoco:report coveralls:jacoco
...
[INFO] Skipping JaCoCo execution due to missing execution data file:/home/travis/build/checkstyle/checkstyle/target/jacoco.exec
...
[ERROR] Failed to execute goal org.eluder.coveralls:coveralls-maven-plugin:2.2.0:jacoco (default-cli) on project checkstyle: I/O operation failed: /home/travis/build/checkstyle/checkstyle/target/site/jacoco/jacoco.xml (No such file or directory) -> [Help 1]
That problem is happening when jacoco failed or did not registered his agent to instrument some code and gather statistics before tests are launched.
Problem was in surefire-plugin, that was declared as:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.9</version>
<configuration>
<argLine>-Duser.language=en -Duser.country=US</argLine>
</configuration>
</plugin>
Proper configuration is (attention to bold part):
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.9</version>
<configuration>
<argLine>${argLine} -Duser.language=en -Duser.country=US</argLine>
</configuration>
</plugin>
.
Useful links that I used for investigation:
