binaries.sh

needs_resolution() {
  local semver=$1
  if ! [[ "$semver" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
    return 0
  else
    return 1
  fi
}

install_yarn() {
  local dir="$1"

  echo "Downloading and installing yarn..."
  local download_url="https://yarnpkg.com/latest.tar.gz"
  local code=$(curl "$download_url" -L --silent --fail --retry 5 --retry-max-time 15 -o /tmp/yarn.tar.gz --write-out "%{http_code}")
  if [ "$code" != "200" ]; then
    echo "Unable to download yarn: $code" && false
  fi
  rm -rf $dir
  mkdir -p "$dir"
  # https://github.com/yarnpkg/yarn/issues/770
  if tar --version | grep -q 'gnu'; then
    tar xzf /tmp/yarn.tar.gz -C "$dir" --strip 1 --warning=no-unknown-keyword
  else
    tar xzf /tmp/yarn.tar.gz -C "$dir" --strip 1
  fi
  chmod +x $dir/bin/*
  echo "Installed yarn $(yarn --version)"
}

install_nodejs() {
  local version="$1"
  local dir="$2"

  if needs_resolution "$version"; then
    echo "Resolving node version ${version:-(latest stable)} via semver.io..."
    local version=$(curl --silent --get --retry 5 --retry-max-time 15 --data-urlencode "range=${version}" https://semver.herokuapp.com/node/resolve)
  fi

  echo "Downloading and installing node $version..."
  local download_url="https://s3pository.heroku.com/node/v$version/node-v$version-$os-$cpu.tar.gz"
  local code=$(curl "$download_url" --silent --fail --retry 5 --retry-max-time 15 -o /tmp/node.tar.gz --write-out "%{http_code}")
  if [ "$code" != "200" ]; then
    echo "Unable to download node $version; does it exist?" && false
  fi
  tar xzf /tmp/node.tar.gz -C /tmp
  rm -rf $dir/*
  mv /tmp/node-v$version-$os-$cpu/* $dir
  chmod +x $dir/bin/*
}

install_iojs() {
  local version="$1"
  local dir="$2"

  if needs_resolution "$version"; then
    echo "Resolving iojs version ${version:-(latest stable)} via semver.io..."
    version=$(curl --silent --get  --retry 5 --retry-max-time 15 --data-urlencode "range=${version}" https://semver.herokuapp.com/iojs/resolve)
  fi

  echo "Downloading and installing iojs $version..."
  local download_url="https://iojs.org/dist/v$version/iojs-v$version-$os-$cpu.tar.gz"
  curl "$download_url" --silent --fail --retry 5 --retry-max-time 15 -o /tmp/node.tar.gz || (echo "Unable to download iojs $version; does it exist?" && false)
  tar xzf /tmp/node.tar.gz -C /tmp
  mv /tmp/iojs-v$version-$os-$cpu/* $dir
  chmod +x $dir/bin/*
}

install_npm() {
  local version="$1"

  if [ "$version" == "" ]; then
    echo "Using default npm version: `npm --version`"
  else
    if needs_resolution "$version"; then
      echo "Resolving npm version ${version} via semver.io..."
      version=$(curl --silent --get --retry 5 --retry-max-time 15 --data-urlencode "range=${version}" https://semver.herokuapp.com/npm/resolve)
    fi
    if [[ `npm --version` == "$version" ]]; then
      echo "npm `npm --version` already installed with node"
    else
      echo "Downloading and installing npm $version (replacing version `npm --version`)..."
      npm install --unsafe-perm --quiet -g npm@$version 2>&1 >/dev/null
    fi
  fi
}