Automate deployment of Google Cloud Endpoints, including updating App Engine's app.yaml with latest config_id

deploy_endpoints.sh

# This script is designed to be run in a post-commit build script.
# It checks if openapi.yaml has been modified and deploys the latest
# API specification to Google Cloud Endpoints and updates app.yaml
# with the latest config_id

SERVICE_NAME=sample.endpoints.[PROJECT_ID].appspot.com

if $(git diff-tree --no-commit-id --name-only -r HEAD | grep -q openapi.yaml); then
    echo "Detected changes to openapi.yaml in last commit, deploying new version to Cloud Endpoints..."
    gcloud service-management deploy openapi.yaml
else
    echo "No changes to openapi.yaml in last commit, no deployment necessary"
fi;

# Update app.yaml with latest config_id
config_id=$(gcloud service-management configs list --service=$SERVICE_NAME --limit=1 | awk 'NR==2{print $1}')
sed -i.bak 's/^\(  config_id: \).*/\1'"$config_id"'/' app.yaml
echo "Updated config_id in app.yaml to $config_id"

Super awesome. I was looking to do something similar and the awk line was exactly what I was missing. Thanks!