How do I pass Istanbul code coverage reports from Bamboo Sonar Scanner task?

[Jon Stalnaker]

Our Bamboo build plan runs several npm tasks, one of which runs tests and creates an Istanbul code coverage report.  There is no Java, just an Angular application.  We want our Sonar Scanner task to pass the results of this test to our Sonar instance.  One of the artifacts of the npm Bamboo tasks is a folder called coverage that contains an html version of the report and some other files (lcov.info).  This is the report that contains the statistics that we want to show in Sonar.

I've tried passing in the various paths but nothing seems to work in the Additional parameters section of the Sonar Scanner Bamboo Task

-Dsonar.javascript.lcov.reportPath=coverage/lcov.info

-Dsonar.javascript.lcov.reportPath=coverage

-Dsonar.javascript.lcov.reportPath=/coverage/lcov.info

We are running Atlassian Bamboo version 5.14.5 build 51419 and Sonar Version 5.6.5

[Jon Stalnaker]

We think the issue is that the application is built with Typescript, not Javascript so it is not triggering the Javascript plugin and ignoring the coverage/lcov.info