#!/bin/bash

PREFIX=$(dirname $(dirname $(which ghc)))
echo "PREFIX = $PREFIX"

function clean () {
  if
    (cd $NAME && ghc --make Setup && ./Setup clean)
  then
    echo "=============== cleaned in $NAME ==============="
  else
    false
  fi
}

function pack () {
  NAME=$(basename $1 .tar.gz)
  TGZ=$NAME''.tar.gz
  URL=http://hackage.haskell.org/package/$NAME/$TGZ

  if clean $NAME
  then
    echo
  else
    rm -rf $NAME
    if [ ! -f $TGZ ]
    then
      echo "retrieving $URL"
      wget $URL
    fi
    tar xzf $TGZ
  fi
  (cd $NAME && \
   ghc --make Setup && \
   ./Setup configure --prefix=$PREFIX -p && \
   ./Setup build -v && \
   ./Setup haddock && \
   ./Setup install -v && \
   echo "=============== $NAME DONE ==============="
  )
}

for i in $*
do
  echo "=============== Starting $i ==============="
  if pack $i
  then
    echo
  else
    echo "=============== Problem in $i ==============="
    exit
  fi
done