Change plug.vim file path to ~/.cache/space-vim/site/autoload/plug.vim

[samwhelp]

Change Log

• change plug.vim file path to ~/.cache/space-vim/site/autoload/plug.vim
• change plugin dir path to ~/.cache/space-vim/plug

Prototype Sample

• svim
• mvim

[rene-descartes2021]

What is the use-case? Allowing for management of read-only directories? Better conformance to XDG Base directory specification? Elimination of hard-coded instances of ~/.vim?

What is the justification for changing the .spacevim default g:spacevim_plug_home from ~/.vim/plugged/ to ~/.cache/space-vim/plug? Everyone can already change this to wherever they please through modifying their .spacevim.

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On this subject of plug-vim, I've put some thought into using dein instead of the plug-vim in #500. Dein values useful complexity beyond the minimalism of plug-vim.
Note that dein is treated as a plugin, in the same path as the other plugins, and autoload/plug.vim no longer exists. i.e. Dein is automatically downloaded into the plugin dir along with the other plugins, and is managed as any other plugin.