Idea: put all-cabal-files in ~/.stackage/update/ instead of ~/.stackage-update/

[DanBurton]

It seems nice for the user if stackage plugins all put their stuff in the same tree.

Sometime soon, Stackage.CLI will provide the getStackageRootIO :: IO FilePath function (currently defined in stackage-setup only), and it might be advisable to use that.

[snoyberg]

I'm not sure I see this as a win, it seems decidedly in the "I wouldn't care personally" category. Maybe others have a thought on this?

[rvion]

+1 for same root folder

I think that having all stackage related plugins share the same dedicated folder is more extensible, more rememberable, and could prevent later problems.

Random hypothetical bonus of having one common folder:

• sharing the folder with some docker container
• clean uninstall with rm -rf $STACKAGE_ROOT or rm -rf ~/.stackage (note that symlinks would not allow that behaviour)
• versioning the whole folder to know what changed (git subfolder would automatically be handled nicely by git)
• allowing the folder to be placed in an usual place for non regular systems with read only folders / disk
• allowing the folder to be placed in an ssd disk instead of an regular drive

[snoyberg]

Change made