#!/bin/sh

# https://github.com/concourse/git-resource/blob/6fcfbd4/assets/out#L4-L16
set -e

exec 3>&1 # make stdout available as fd 3 for the result
exec 1>&2 # redirect all output to stderr for logging

source=$1

if [ -z "$source" ]; then
  echo "usage: $0 <path/to/volume>"
  exit 1
fi
#######################################

# credentials are provided via environment variables
# http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#cli-environment
aws s3 sync $source "s3://$S3_BUCKET"

# use the current UNIX time as the version
# https://github.com/concourse/git-resource/blob/6fcfbd4/assets/out#L133-L136
jq -n "{
  version: {
    timestamp: $(date +%s)}
}" >&3