stack bootstrapper

stack

#!/bin/bash
which stack > /dev/null
if [ $? -ne 0 ]; then
  if [ ! -f ./.stack/stack ]; then
    OS=`uname`
    if [ $OS == "Darwin" ]; then
      STACK_URL=https://github.com/commercialhaskell/stack/releases/download/v0.1.3.1/stack-0.1.3.1-x86_64-osx.gz
    elif [ $OS == "Linux" ]; then
      STACK_URL=https://github.com/commercialhaskell/stack/releases/download/v0.1.3.1/stack-0.1.3.1-x86_64-linux.gz
    else
      echo "The OS $OS is not supported."
      exit 1
    fi
    echo "Downloading stack..."
    mkdir -p .stack
    touch ./.stack/stack
    wget -qO- $STACK_URL --no-check-certificate | gunzip -dc > ./.stack/stack
    if [ $? -ne 0 ]; then
      echo Could not download stack.
      rm -f ./.stack/stack
      exit 1
    fi
    chmod a+x ./.stack/stack
  fi
  ./.stack/stack $*
else
  stack $*
fi