journal

#!/bin/bash

set -euo pipefail
IFS=$'\n\t'

up() {
  create-pod
  start-db
  wait-for-postgres
  migrate
  start-web
  start-pod
}

down() {
  echo >&2 Killing and pruning the pod
  podman pod kill journal
  podman pod prune --force
}

status() {
  echo >&2 Pods:
  podman pod ps --filter name=journal
  echo >&2
  echo >&2 Containers:
  podman ps --filter pod=journal
}

init() {
  echo >&2 Creating a new podman machine
  podman machine init
  podman machine start
}

create-pod() {
  echo >&2 Creating the pod
  podman pod create --publish 4567:4567 --name journal
}

start-pod() {
  echo >&2 Starting the pod
  podman pod start journal
  echo >&2 Journal is up at http://localhost:4567
}

start-db() {
  echo >&2 Starting the database
  podman container run \
    --detach \
    --name=db \
    --pod=journal \
    --restart=on-failure \
    --env POSTGRES_USER=vagrant \
    --env POSTGRES_PASSWORD=vagrant \
    --env POSTGRES_DB=journal \
    docker.io/postgres:alpine
}

wait-for-postgres() {
  echo >&2 Waiting for the database to be up
  podman container run \
    --name postgres-is-ready \
    --pod=journal \
    --add-host db:127.0.0.1 \
    --rm \
    --env DB=postgres://vagrant:vagrant@db/journal \
    docker.io/postgres:alpine \
    sh -c "timeout 5 sh -c 'until pg_isready --dbname \$DB; do sleep 1; done'"
}

migrate() {
  echo >&2 Migrating the database to the latest schema version
  podman container run \
    --name=migrate \
    --pod=journal \
    --interactive \
    --tty \
    --rm \
    --env DB=postgres://vagrant:vagrant@db/journal \
    --env RACK_ENV=production \
    --add-host db:127.0.0.1 \
    docker.io/suhlig/journal \
    bundle exec rake db:migrate
}

start-web() {
  echo >&2 Starting the web application
  podman container run \
    --detach \
    --name=web \
    --pod=journal \
    --restart=on-failure \
    --env RACK_ENV=production \
    --env PORT=4567 \
    --env DB=postgres://vagrant:vagrant@db/journal \
    --add-host db:127.0.0.1 \
    docker.io/suhlig/journal
}

# Starts an interactive psql console connected to db
psql() {
  podman container run \
    --name psql \
    --pod=journal \
    --interactive \
    --tty \
    --rm \
    --add-host db:127.0.0.1 \
    docker.io/postgres:alpine \
    psql postgres://vagrant:vagrant@db/journal
}

generate() {
  echo >&2 Generating Kubernetes Pod YAML
  mkdir -p k8s
  podman generate kube journal >k8s/journal.yml
  echo >&2 Check out k8s/journal.yml and start the pod with
  echo >&2 podman play kube k8s/journal.yml
}

if [ $# -ne 0 ]; then
  "$1" "${@:2}" # call one of the functions defined in this script
else
  echo >&2 "Error: Command missing."
  echo >&2
  echo >&2 "Usage:"
  echo >&2
  echo >&2 "  $(basename "$0") up|down|status|migrate|psql|generate"
  exit 1
fi