Option path-to-lcov is now deprecated, use file instead.

You can skip file option and coveralls will try to find all supported coverage files and combine their data.

If coveralls fails to determine your coverage report format, use explicit format option to specify it. See supported values.

If you see a message Nothing to report it might be a path resolution issue. Check filenames in the coverage report and use base-path option to adjust paths to the source files.