pre-receive

#!/bin/bash

# fail fast
set -e 

function echo_title() {
  echo $'\e[1G----->' $*
}

function echo_normal() {
  echo $'\e[1G      ' $*
}
function process() {
  while read line; do
    if [[ "$line" == --* ]]; then
      echo $'\e[1G'$line
    else
      echo $'\e[1G      ' "$line"
    fi

  done 
}

while read OLDREV NEWREV REF; do

  if [ "$REF" != "refs/heads/master" ]; then
    continue
  fi

  echo_normal $'\n'
  echo_title "Openruko receiving git push"
  build_root=/tmp/checkout
  mkdir -p $build_root
  GIT_WORK_TREE=$build_root git checkout -f $NEWREV >/dev/null 2>&1

  buildpack_root=/tmp/buildpacks/buildpacks
  buildpacks=($buildpack_root/*)

  selected_buildpack=

  if [ -n "$BUILDPACK_URL" ]; then
    echo_title "Fetching custom buildpack"
    buildpack="$buildpack_root/custom"
    rm -fr "$buildpack"
    unset GIT_WORK_TREE

    git clone --depth=1 "$BUILDPACK_URL" "$buildpack"
    selected_buildpack="$buildpack"
    buildpack_name=$($buildpack/bin/detect "$build_root") && selected_buildpack=$buildpack
  else
    for buildpack in "${buildpacks[@]}"; do
      buildpack_name=$($buildpack/bin/detect "$build_root") && selected_buildpack=$buildpack && break
    done
  fi

  if [ -n "$selected_buildpack" ]; then
    echo_title "$buildpack_name app detected"
  else
    echo_title "Unable to select a buildpack"
    exit 1
  fi

  cache_root=/tmp/cache
  mkdir -p $cache_root

  ($selected_buildpack/bin/compile "$build_root" "$cache_root") | process


  echo_title "Discovering process types"
  release_output=$($selected_buildpack/bin/release "$build_root" "$cache_root") 
  default_types=$(echo "$release_output" | sed -ne '/^default/,/(\z|^[a-z])/  {
      /^[a-z]/n
      s/  //p
  }')

  procfile=
  if [ -f "$build_root/Procfile" ]; then
    procfile=$(cat "$build_root/Procfile" | sed 's/^/  /')
    echo_normal "Procfile declares types -> " $(cat "$build_root/Procfile" | cut -d: -f1 | tr $'\n' ',' | sed -e 's/,$//')
  else
    procfile=$(echo "$default_types" | sed -e 's/^/  /')
  fi

  echo_normal "Default process types for $buildpack_name -> " $(echo "$default_types" | cut -d: -f1 | tr $'\n' ',' | sed -e 's/,$//')

  if [ -f "$build_root/.slugignore" ]; then
    tar --exclude='.git' -X "$build_root/.slugignore" -C $build_root -czf /tmp/slug.tgz .
  else
    tar --exclude='.git' -C $build_root -czf /tmp/slug.tgz .
  fi

  slug_size=$(du -Sh /tmp/slug.tgz | cut -d' ' -f1)
  echo_title "Compiled slug size is $slug_size"

  echo_normal "Using slug_id: ${slug_id}"
  release_payload=$(echo -e "${release_output}\npstable:\n${procfile}\ncommit: $NEWREV\nslug_id: ${slug_id}")
  curl -0 -s -o /dev/null -X PUT -T /tmp/slug.tgz "$slug_put_url" 

  release_number=$(curl --insecure -s -X POST -H 'Content-Type: text/plain' --data-binary "$release_payload" "$push_code_url")

  echo_title "Launching... done v" $release_number
  echo_normal "$dyno_web_url deployed to Openruko"
  echo_normal $'\n'
  
done;