Master branch contains lot of missing SPDX identifiers, we will clean them up but this will take some time. In the meantime, we should not increase the license missing files. Each PR will report if there is no license issue or positive number reported as Github status. Travis won't fail if there are issues. This will highlight the issues that anyone can fix.
As soon as master is clean, we can fix set_status and revert part of this commit.
The goal: check license offenders in pull request
This is similar to what astyle does in Travis. We get list of files being changed. Because scancode does not support list of files being scanned but rather a file or directory, we copy files to SCANCODE folder. Execute scancode license check in this folder and check for offenders.
The rules there are: code files must have a license and SDPX identifier. If they don't, we print these and ask for review.
It functions nicely there is just one workaround needed. SPDX is not always 100 percent correctly found, therefore we recheck file if no SPDX manually in the script. This proves to remove false positives.
Martin Kojtal