Heroku deploy script for multi-stage docker containers with Rails

deploy-heroku.sh

#!/bin/bash

app_name="my-heroku-app"
environment="production"
db_migrate_container="migrate"
app_containers="web worker"
app_url="https://amkisko.github.io"

github_org="amkisko"
github_repo="my-app"

docker_platform="linux/amd64"

function log() {
  echo
  echo -e "\033[1;32m$1\033[0m"
}
function run() {
  log "$1"
  eval "$1"
}
function run_local() {
  if [[ -z "${REMOTE_DEPLOYMENT}" ]]; then
    run "$1"
  fi
}

uncommitted_changes=$(git status --porcelain)
if [[ -n "${uncommitted_changes}" ]]; then
  echo "There are uncommitted changes. Please commit or stash them before deploying."
  echo "${uncommitted_changes}"
  exit 1
fi

heroku_whoami=$(heroku auth:whoami)
run "heroku auth:token | docker login --username=${heroku_whoami} --password-stdin registry.heroku.com >/dev/null"

branch_name=$(git rev-parse --abbrev-ref HEAD)

system_dockerfile="usr/share/system/Dockerfile"
system_image="registry.heroku.com/${app_name}/system-${branch_name}"
run "docker-buildx build -t ${app_name}:system-${branch_name} -f ${system_dockerfile} --platform ${docker_platform} ."
run "docker tag ${app_name}:system-${branch_name} ${system_image}"
run "docker push ${system_image}"

release_tag="release/${environment}-$(date -u +"%Y-%m-%dT%H%M%SZ")"
git_commit_sha=$(git rev-parse HEAD)

rails_dockerfile="usr/share/rails/Dockerfile"
run "docker-buildx build -t ${app_name}:latest -f ${rails_dockerfile} --platform ${docker_platform} --build-arg base_image=${system_image} --build-arg environment=${environment} --build-arg git_commit_sha=${git_commit_sha} ."

for container in ${db_migrate_container} $(echo ${app_containers}); do
  tag="registry.heroku.com/${app_name}/${container}"
  run "docker tag ${app_name}:latest ${tag}"
  run "docker push ${tag}"
done

run "heroku container:release ${db_migrate_container} --app ${app_name}"
run "heroku run \"/bin/bash -c 'bundle exec rails db:migrate'\" --type=${db_migrate_container} --app ${app_name} --exit-code"
run "heroku container:rm migrate --app ${app_name}"

run "heroku container:release ${app_containers} --app ${app_name}"

run "gh api -X POST /repos/${github_org}/${github_repo}/git/refs -f ref=refs/tags/${release_tag} -f sha=${git_commit_sha}"