Cabal FAQ outdated

[tomjaguarpaw]

https://www.haskell.org/cabal/FAQ.html is almost all severely outdated (💀)

• 💀 Dependencies conflict

  Refers to behaviour from old cabal that doesn't really occur with modern cabal (say from 3.0 onwards). It mentions GHC 6.10!

• 💀(?) Hidden packages (a)

  I think cabal now tells you this information itself now, doesn't it?

• 💀 Hidden packages (b)

  It's about a library split that happened in ghc 6.8. No longer relevant.

• 💀? runProcess: does not exist

  This may be outdated. The issue link is certainly dead
  http://hackage.haskell.org/trac/hackage/ticket/403

• 💀? ExitFailure 1

  Does this still apply?

• 💀 runghc Setup complains of missing packages

  This seems to be referring to a rather old way of installing packages. It
  would probably be best if it were removed. I really doubt it is a
  frequently asked question.

• 💀 Parsec 2 vs 3

  Outdated. Remove it. Highly doubtful that it is frequently asked.

• 💀 Cabal goes into an infinite loop / runs out of memory

  "This happens when you use cabal-install version 0.5.x with ghc-6.10"

• 💀 Internal error: invalid install plan

  Suggests upgrading to "cabal-install >= 0.10". Severely out of date.
  Remove it.

[tomjaguarpaw]

Addressing this requires knowing who the owner of the cabal/ subsite is.

Next action: Make a PR to https://github.com/haskell/cabal-website

Waiting for: Response to haskell/cabal-website#15

Waiting for: The changes to appear on https://www.haskell.org/cabal/FAQ.html

[tomjaguarpaw]

I'm not sure whether the error messages are still outdated but they are not any longer misleading.