#!/bin/bash
# Totally c&p from various places all accross Internet
#

# Erlang
ERLANG_VERSION=${ERLANG_VERSION:-18.3}
ERLANG_CACHED_DOWNLOAD="${HOME}/cache/OTP-${ERLANG_VERSION}.tar.gz"
ERLANG_DIR=${ERLANG_DIR:="$HOME/erlang"}

# Elixir
ELIXIR_VERSION=${ELIXIR_VERSION:-1.2.5}
ELIXIR_CACHED_DOWNLOAD="${HOME}/cache/elixir-v${ELIXIR_VERSION}.zip"
ELIXIR_DIR=${ELIXIR_DIR:="$HOME/elixir"}


# Erlan download
echo Installing Erlang version ${ERLANG_VERSION}
wget --continue --output-document "${ERLANG_CACHED_DOWNLOAD}"  "https://s3.amazonaws.com/heroku-buildpack-elixir/erlang/cedar-14/OTP-${ERLANG_VERSION}.tar.gz"
mkdir "${ERLANG_DIR}"
tar -xaf "${ERLANG_CACHED_DOWNLOAD}" --strip-components=1 --directory "${ERLANG_DIR}"
${ERLANG_DIR}/Install -minimal ${ERLANG_DIR}
export PATH="${ERLANG_DIR}/bin:$PATH"

# Elixir download
echo Installing Erlang version ${ELIXIR_VERSION}
wget --continue --output-document "${ELIXIR_CACHED_DOWNLOAD}"  "https://s3.amazonaws.com/s3.hex.pm/builds/elixir/v${ELIXIR_VERSION}.zip"
mkdir ${ELIXIR_DIR}
cd ${ELIXIR_DIR}
unzip -q ${ELIXIR_CACHED_DOWNLOAD}
export PATH="${ELIXIR_DIR}/bin:$PATH"
cd -