Proposal: Don't read environment files by default

[Herbert Valerio Riedel]

On 2019-03-28 at 15:55:01 +0200, Bryan Richter wrote:

[...]

> If we want Nix-style builds, let's do them Nix style, and use a shell.

Cabal supports multiple workflows/idioms. Sometimes you want a transient
sub-shell (which is the one you're e.g. limited to when using Stack),
while sometimes you want to use cabal to set up an implicit stateful
environment after which you want cabal to be completely out of the
picture and operate in a non-Nix-style idiom...

I for one would hate to remove what I consider a useful feature (which I
happen to use a lot myself and I also show it off when teaching Haskell;
and which we spent a lot of effort designing and implementing in ghc and
cabal over the last couple years...) just to satisfy another group of
people who don't appreciate it and request that those who like it shall
not have it anymore... :-/