slack-notify

#!/usr/bin/env bash

set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$(dirname $0)/../common/functions"

main() {
  local app="$1"
  local hook="$(basename $0)"
  slack_notify "${app}" "${hook}"
}

slack_notify() {
  local app="$1"
  local hook="$2"
  local file="${DOKKU_ROOT}/${app}/SLACK_WEBHOOK"

  if [[ ! -s "${file}" ]]; then
    return 0
  fi

  local webhook="$(cat "${file}")"
  local payload="$(slack_payload "${app}" "${hook}")"

  dokku_log_info1 "Notifying Slack ..."
  curl \
    --request "POST" \
    --silent \
    --fail \
    --show-error \
    --location \
    --output "/dev/null" \
    --header "Content-Type: application/json" \
    --data "${payload}" \
    "${webhook}"
}

slack_payload() {
  local app="$1"
  local hook="$2"

  local stage
  case "${hook}" in
    receive-app)
      stage="Starting"
      ;;
    post-deploy)
      stage="Finished"
      ;;
  esac

  cat <<JSON
{
  "username":   "dokku-slack",
  "icon_emoji": ":neckbeard:",
  "text":       "${stage} deploy of ${app}"
}
JSON
}

main $@