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Code being copied isn't an issue. I knew full well what it meant to release something opensource and I don't regret it one bit. What was copied with no credit is the foundation of the project. How it actually works. If I were the patenting type, this would be the thing you would patent. ps. I don't regret not patenting anything. And I don't mean the general concept of package/app managers, they have been done a hundred times. If you look at similar projects across OSes, Homebrew, Chocolaty, Scoop, ninite etc; you'll see they all do it in their own way. However, WinGet works pretty much identical to the way AppGet works. Do you want to know how Microsoft WinGet works? go read the article (https://keivan.io/appget-what-chocolatey-wasnt/) I wrote 2 years ago about how AppGet works.
I'm not even upset they copied me. To me, that's a validation of how sound my idea was. What upsets me is how no credit was given.
And what would be the benefit if Microsoft gave you credit for it? Most likely their lawyers would reject it since you may then be able to sue them for...I don't know what, but money in any case.
It's a very Microsoft-thing to do to copy someone else's idea and improve on it (C#, RDP, Excel). If you release something as open-source you have to ask yourself if your doing it out of altruism or for money? In case of the latter you have to plan accordingly, by patenting or with restrictive licensing.