Providing a common mechanism to run multiple builds from different projects has problems, such as different job may have different parameters and may need to run on different branches/tags . I'd suggest to add the logic to your build script, that is: to fire build in different projects with curl via OneDev's restful api.

Yes you might well be right although my guess is that most users will build on master branches (80% vs 20%). But the curl idea is great. Could you write a documentation on the API when you have some time?

RESTful api help here:

The job run endpoint can be used to submit build jobs

Thanks, will try tomorrow.