Cloud Builder JavaScript Lint Example

.eslintrc.json

{
    "extends": "google"
}

README.md

Cloud Builder JavaScript Lint Example

This example demonstrates the use of Cloud Build to do style checking with eslint.

To build and run manually with Docker run

docker build -t eslint .
docker run -w /app eslint

To run with Cloud Build use the command

gcloud builds submit . --config=cloudbuild.yaml

You will see that there are several style errors reported for the the sum.js file, including . Edit sum.js to be like this:

/**
 * Add two numbers together
 * @param {number} a - The first operand
 * @param {number} b - The second operand
 * @return {number} The sum of the two operands
 */
function sum(a, b) {
  return a + b;
}
console.log('1 + 1 = ' + sum(1, 1));

Then run cloud build again. It should succeed this time.

cloudbuild.yaml

steps:
- name: 'gcr.io/cloud-builders/docker'
  args: [ 'build', '-t', 'gcr.io/$PROJECT_ID/eslint', '.' ]
- name: gcr.io/cloud-builders/docker
  args: ['run', '-w', '/app', 'gcr.io/$PROJECT_ID/eslint']

Dockerfile

FROM node:10.10.0

RUN mkdir /app
COPY *.js /app/
COPY *.json /app/
RUN npm install -g eslint eslint-config-google
CMD ["/usr/local/bin/npm", "run", "lint"]

package.json

{
  "name": "javascript",
  "version": "1.0.0",
  "description": "",
  "main": "sum.js",
  "scripts": {
    "lint":"eslint ."
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "eslint": "^5.5.0",
    "eslint-config-google": "^0.10.0"
  }
}

sum.js

function sum(a, b) {
  sum = a + b
  return sum
}