rename master branch to main

[CagtayFabry]

in line with the updated git & GitHub defaults the master branch should be renamed to main

(also applies to other weldx repositories)

[vhirtham]

Here is some guidance: click me

[CagtayFabry]

we can also rename it soon (e.g. tomorrow) and see what fails since currently there is no near term release or similar in the pipeline

what do you think @marscher ?

[marscher]

It should be renamed due to political reasons, right? Honestly I think it would make a difference for repositories like NumPy or so, which is used by thousands of users. In case of weldx, which is being cloned by less than 10 people, I do not believe it is worth the effort.
In practice I've noticed, that all working copies need to be updated too, so the rename takes full effect.

[CagtayFabry]

I think using main is now the de-factor default git branch nomenclature so it would make sense to follow that just to avoid confusion

[marscher]

This is for no reason a technical debate. For new repos it is now the default name. But default branches can be named arbitrarily. The default branch is being checked out after a clone.

The confusion arises from renaming a long standing de-facto standard (the unspeakable branch) to something new. I have a large mixture of repos with different patterns now, confusing me every time. But I guess this is a small price to pay for more equality rights, right?

[CagtayFabry]

The reason I am bringing this up is that I would like to have a consistent naming/branching schema for weldx related repos, which I do consider a technical issue. Most of them have main as the default branch name as of now and I expect the same for future repositories. This is unrelated to other projects or political issues, I simply would like to have consistency in this namespace and think that using main here is the easier way to achieve this