#!/bin/sh

VERSION=$1

if [ -z "$VERSION" ]; then

   echo "Usage: $0 X.Y.Z"

   exit 1

fi

#set +x

#FIXME lib

LIBDIR=/usr/lib64/ghc-$VERSION

if [ ! -d "$LIBDIR" ]; then

   echo "$0: $LIBDIR does not exist: please install ghcX.Y first"

   exit 1

fi

# FIXME arch

STACK_PROGRAMS=$HOME/.stack/programs/$(arch)-linux

STACK_GHCDIR=${STACK_PROGRAMS}/ghc-tinfo6-$VERSION

if [ -e "$STACK_GHCDIR" ]; then

   echo "$0: $STACK_GHCDIR exists: to replace, please remove first"

   exit 0

fi

mkdir -p $STACK_GHCDIR/bin

for i in ghc ghc-pkg ghci hp2ps hpc hsc2hs runghc runhaskell; do

    if [ -x /usr/bin/$i-$VERSION ]; then

        ln -s /usr/bin/$i-$VERSION $STACK_GHCDIR/bin/$i

    elif [ -x /usr/bin/$i-ghc-$VERSION ]; then

        ln -s /usr/bin/$i-ghc-$VERSION $STACK_GHCDIR/bin/$i

    else

        ln -s /usr/bin/$i $STACK_GHCDIR/bin/$i

    fi

done

ln -s /usr/bin/haddock-ghc-$VERSION $STACK_GHCDIR/bin/haddock

if [ ! -f "${STACK_GHCDIR}.installed" ]; then

    echo "installed" > $STACK_GHCDIR.installed

fi