compile

#!/usr/bin/env bash
# bin/compile <build-dir> <cache-dir> <env-dir>

set -euo pipefail

function indent() {
  c='s/^/       /'
  case $(uname) in
    Darwin) sed -l "$c";;
    *)      sed -u "$c";;
  esac
}

AWS_CLI_URL="https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip"

BUILD_DIR=$1
BUILDPACK_DIR="$(dirname $(dirname $0))"
INSTALL_DIR="/app/.awscli"
TMP_DIR=$(mktemp -d)

echo "-----> Downloading AWS CLI"
curl --silent --show-error --fail -o "${TMP_DIR}/awscliv2.zip" "${AWS_CLI_URL}" |& indent
unzip -qq -d "${TMP_DIR}" "${TMP_DIR}/awscliv2.zip" |& indent

echo "-----> Installing AWS CLI"
mkdir -p "${BUILD_DIR}/.awscli"

# The AWS installer creates symlinks that use absolute paths, as such the install
# location must match the location from which the CLI is eventually run.
# At runtime the app will be run from /app, however at build time $BUILD_DIR is
# typically a path under /tmp (unless a Heroku CI build, in which case it's /app).
# In order to make all cases work, we have to create a symlink from /app to $BUILD_DIR,
# so that we can use `/app` paths for the installer, so that the symlinks it creates
# will use /app paths. A symlink is used instead of file copying to improve build times.
if [[ "${BUILD_DIR}" != /app ]]; then
  mkdir -p /app
  ln -nsf "${BUILD_DIR}/.awscli" "${INSTALL_DIR}"
fi

"${TMP_DIR}/aws/install" --install-dir "${INSTALL_DIR}/aws-cli" --bin-dir "${INSTALL_DIR}/bin" |& indent
/app/.awscli/bin/aws --version |& indent

mkdir -p "${BUILD_DIR}/.profile.d"
cat > "${BUILD_DIR}/.profile.d/awscli.sh" <<'PROFILE'
export PATH="/app/.awscli/bin:${PATH}"
PROFILE

cat > "${BUILDPACK_DIR}/export" <<'EXPORT'
export PATH="/app/.awscli/bin:${PATH}"
EXPORT

rm -rf "${TMP_DIR}"

echo "-----> Successfully installed AWS CLI"