#1838: do not use getEnv "HOME", use System.Directory.getHomeDirectory
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Reporter: guest | Owner:
Type: bug | Status: new
Priority: normal | Component: GHCi
Version: 6.6.1 | Severity: normal
Keywords: | Testcase:
Architecture: Unknown | Os: Windows
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[i've set component to `ghci`, but this isn't limited to ghci]
i was wondering where ghci was looking for `~/.ghci` on windows, because
that doesn't seem to work for me, unless i run `ghcii.sh` under cygwin,
inheriting cygwin's `HOME` environment variable.
my win/xp doesn't have `%HOME%`, the closest i can find in the docs are
`%HOMEDRIVE%` and `%HOMEPATH%`. there is some special casing in
`System.Directory.getHomeDirectory`, which seems to follow a different
route via a C helper, but ends up with the same result (here a session
with a plain windows `ghci 6.6.1`, but the code hasn't changed in head):
{{{
Prelude> System.Environment.getEnv "HOME"
*** Exception: HOME: getEnv: does not exist (no environment variable)
Prelude> System.Environment.getEnv "HOMEPATH"
"\\Documents and Settings\\cr3"
Prelude> System.Environment.getEnv "HOMEDRIVE"
"C:"
Prelude> System.Directory.getHomeDirectory
"C:\\Documents and Settings\\cr3"
}}}
the main culprit seems to be `compiler/ghci/InteractiveUI.hs`, with 2
cases. there also seem to be several instances of `Compat/Directory.hs`,
in `compat/`, in `libraries/bootstrapping.Cabal/Distribution/`, and in
`libraries/Cabal/Distribution/`.
could the `ghci` uses (and possibly the `Compat` uses as well?) please be
replaced with uses of `System.Directory.getHomeDirectory`?
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1838>
GHC <http://www.haskell.org/ghc/>
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