cabal output changed, breaking Build.hs under some conditions

[MtnViewMark]

From Chris Dornan:

The current tar-ball generator doesn’t work with the latest cabal-install (0.14.0).

In build.hs we have

-- -- Too sleepy. Future: solve this via the cabal library -- let cmd = "cabal install --dry-run --reinstall " ++ (

intercalate " " [ package

| (_, package) <- urls

] ) ++ " > platform.packages.raw"

--writeFile "platform.packages.cmd" cmd system cmd src <- readFile "platform.packages.raw"

let programs = drop 2 $ lines src writeFile "platform.packages" (unlines programs)

The problem is that ' cabal install --dry-run --reinstall' has become too loquacious for our convenience and is annotating the output with extra context. The first word of the output still contains what we need (the package) so I have replaced the second let binding above with this,

let fw ln = case words ln of { [] -> ""; p:_ -> p; }

programs = map fw $ drop 2 $ lines src

to get a sensible content for platform.packages (for a while).

The modified Build.hs can be found here: https://github.com/cdornan/haskell-platform/blob/pre-release/src/generic/Build.hs

[MtnViewMark]

fixed in HP 2012.4.0.0 rc2