#!/bin/bash

set -e

# Set the variables below or add them dynamically.
region="us-west-2"
environment="<environment>"
cluster="<cluster>"
commit=$(git rev-parse --short HEAD)
full_commit=$(git rev-parse HEAD)
project="<name>"
image="<account-id>.dkr.ecr.us-west-2.amazonaws.com/$project:$commit"

echo "region:      $region"
echo "environment: $environment"
echo "commit:      $commit"
echo "cluster:     $cluster"
echo "project:     $project"
echo "image:       $image"

function release() {
  local service="$1"

  export AWS_DEFAULT_REGION="$region"

  # Get the task definition and patch the image value.
  aws ecs describe-task-definition --task-definition $service \
    | jq -r '.taskDefinition' \
    | jq -r '{family, containerDefinitions, networkMode, volumes, networkMode, volumes, cpu, memory}' > task-definition.json
  cat task-definition.json | jq '.containerDefinitions[0].image = "'$image'"' > new-task-definition.json

  # Register the task definition and get the next revision.
  revision=$(aws ecs register-task-definition --cli-input-json "$(cat new-task-definition.json)" | jq -r '.taskDefinition.revision')

  echo -n "deploying $service to $revision..."

  # Contains secrets.
  rm task-definition.json
  rm new-task-definition.json

  # Patch the service to the next revision.
  aws ecs update-service --cluster $cluster --service $service --task-definition $service:$revision &> /dev/null
  echo " done"
}