Unify/simplify the config file search across OS versions. ALT: Allow all versions to honor XDG_CONFIG_HOME if set about vim

[saccarosium]

XDG environment variables are a Linux spefic. Although on MacOS in the terminal they are use, due to be UNIX . On windows there are other sets of guidelines that should be followed.

[eldorel]

XDG environment variables are a Linux spefic. Although on MacOS in the terminal they are use, due to be UNIX . On windows there are other sets of guidelines that should be followed.

Environment variables are trivial to add on all OS's.

Part of why I made the request is because I am using the XDG variables on several windows 10 and 11 systems to configure other cross-platform software, and it was delightfully easy to do.

Then I installed vim on my new laptop, and had to think about where I needed to place all of the different config files so that it works the same way no matter what terminal/environment I execute from.

On the plus side, I found out that setting XDG_CONFIG_HOME in the windows user environment also makes that variable visible from WSL/Cygwin/Wezterm/Powershell/etc...

So now I just have a handful of identical single line .vimrc/_vimrc files with a single 'source' directive that points to the actual config file.

source $XDG_CONFIG_HOME\vim\vimrc