deploy

#!/usr/bin/env bash

project=roger-api
service=push

# Configuration YAML is piped into kubectl below!

set -euf -o pipefail

echo -e "Building and deploying \x1B[97m$service\x1B[0m..."
echo

# Ensure that the working directory is clean.
if [[ -n $(git status --porcelain) ]]; then
  echo -e "\x1B[91mPlease commit or revert changes before deploying.\x1B[0m"
  exit 1
fi

# Update remote branch.
git fetch

# Ensure that the local branch and the remote branch are in sync.
if [[ "$(git rev-parse @)" != "$(git rev-parse @{u})" ]]; then
  echo -e "\x1B[91mLocal and remote branch are out of sync. Please pull/push any changes.\x1B[0m"
  exit 1
fi

# Calculate a tag to use for the deploy.
# TODO: First check if there's already a tag for the current commit.
tag=""
tag_number=1
while true; do
  tag="$(date -u +%Y-%m-%d)/$(printf %03d $tag_number)"
  git rev-parse "$tag" >/dev/null 2>&1 || break
  (( tag_number++ ))
done

echo -en "\x1B[92mReady to build and deploy.\x1B[0m Tag as \"$tag\" and deploy? (Y/n) "

# Confirm that the deploy should still happen.
read answer
case "$answer" in
  [yY]|[yY][Ee][Ss]|"") ;;
  *) echo -e "\x1B[91mAborting.\x1B[0m"; exit 1;;
esac

# Docker and Kubernetes friendly version.
version="${tag//\//-}"

echo
docker build -t gcr.io/$project/$service:$version .
echo
gcloud docker -- push gcr.io/$project/$service:$version
echo

cat << YAML | kubectl apply -f -
apiVersion: v1
kind: Service
metadata:
  name: $service
  labels:
    app: $service
spec:
  type: LoadBalancer
  ports:
  - port: 80
    targetPort: 8080
  selector:
    app: $service
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: $service
spec:
  replicas: 5
  template:
    metadata:
      labels:
        app: $service
    spec:
      containers:
      - name: $service
        image: gcr.io/$project/$service:$version
        ports:
        - containerPort: 8080
YAML

# Check if deploy was successful.
if [[ $? -ne 0 ]]; then
  echo
  echo -e "\x1B[91mDeploy was aborted.\x1B[0m"
  exit 1
fi

echo
echo -e "\x1B[92mEverything checks out.\x1B[0m Tagging and pushing the tag."
echo

git tag "$tag"
git push --tags

echo
echo -e "\x1B[92mAll done!\x1B[0m Au revoir!"