Report on specific module in a multi-module project without normal compilation fails

[eyalroth]

If one attempts to reportScoverage on a specific module in a multi-module project without normal compilation, the compilation will fail in case this specific module depends on another module in the project.

For instance, in a multi-module project, a module depends on common, trying to run the following will fail in compilation:
gradle :a:reportScoverage -x compileScala

The culprit is in the code which is supposed to make sure that the scoverage compilation output directory will be build/classes/scala/main instead of build/classes/scala/scoverage when normal compilation is omitted.

It only does this when the reportScoverage task is in the graph of that module; in the aforementioned example, the plugin will fail to detect that the (scoverage) compilation of the common module needs to adjust its output directory since the :common:reportScoverage task is not in the task graph.

[Mrfaisa6]

#112 (comment)