cabal-install bootstrap script respects PREFIX inconsistently, fails

The bootstrap.sh script that comes with cabal-install is documented as respecting a PREFIX environment variable, but if you pass one it will ignore it during the installation of the executable:

  ./Setup configure --user "--prefix=${HOME}/.cabal" \
    --with-compiler=${GHC} --with-hc-pkg=${GHC_PKG} \
    ${EXTRA_CONFIGURE_OPTS} ${VERBOSE} \
    || die "Configuring the ${PKG} package failed"

But then respect it during the post-install self-test:

CABAL_BIN="$PREFIX/bin"
if [ -x "$CABAL_BIN/cabal" ]
then

1. ..

else
    echo "Sorry, something went wrong."
fi

Which means that it always emits the "Sorry, something went wrong." message and not the success message when PREFIX was specified. Also that it installed into the wrong directory.

Trac metadata

Trac field	Value
Version	6.10.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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