There are different versions of the GPL license, ranging from the lightweight copyleft LGPL to the strong copyleft AGPL.
But if the LGPL is a lighter copyleft version of the GPL, why isn’t there a lighter copyleft version of the AGPL?
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That is basically what the EUPL is.
Imagine a game difficulty selection level:
easy <> normal <> hardEasy is easier than normal. Why don’t we have an easier version of hard? That’s the kind of question you ask.
Nah, you can have a license that says you get a cupcake and another license that says you need to give up your first-born.
And then you can mush those licenses to say that you need to give up your first-born, but you get a cupcake in return.Unless the specific license terms contradict, this is totally possible.
I imagine, it’s just too much of a niche and practically not enforceable anyways.
You would need to somehow know that a web service is a using a modified version of your library, then you’d be able to demand those library changes to be open-sourced.
And well, just in general, covering all kinds of niche use-cases isn’t terribly healthy for open-source licenses, because each modification is something that can be challenged in court and which might be incompatible with other licenses.
Ultimately, a library under such a specialty license would probably not see much use either. You could only really depend on it in AGPL applications. And at some point, you do have to ask yourself, if it’s even useful to develop your library then.You want a weaker version of the AGPL, that’s what the GPL is.
From my understanding in terms of strength between the three, it’s:
LGPL (weakest) > GPL (middle of the road) > AGPL (strongest)came here to say the same
Isn’t the entire point of AGPL to not be weak?
AGPL is specifically for web services. For example, if Nextcloud were provided under the GPL, Amazon or the like could serve a modified version of Nextcloud without having to hand out their modifications. As far as the GPL is concerned, Amazon is the user and the software just happens to accept requests from the network.
With AGPL, those who use the software over the network are also deemed users and therefore have the right to access the source code.
How would you link against a cloud service?
I imagine, the scenario would be that the cloud service links against a library under the supposed new license.
And then, even if you’re just using the cloud service over the network, you can demand changes to the source code of that library to be open-sourced.
