Treating warnings as errors because process.env.CI = true. Failed to compile

Question

I am working on a react-weather application for self learning purpose. Deployed the same in gh-pages.
URL
https://davisraimon.github.io/react-weather/
Repo
https://github.com/davisraimon/react-weather

When tried to integrate my application with Travis Ci, i got error as follows. It says like i have to change some env variable called Process.env.CI.

$ git clone --depth=50 --branch=master https://github.com/davisraimon/react-weather.git davisraimon/react-weather
nvm.install
4.18s$ nvm install stable
cache.1
Setting up build cache
cache.npm
$ node --version
v14.4.0
$ npm --version
6.14.5
$ nvm --version
0.35.3
install.npm
13.21s$ npm ci 
7.45s$ npm run build
> [email protected] build /home/travis/build/davisraimon/react-weather
> react-scripts build
Creating an optimized production build...
Treating warnings as errors because process.env.CI = true.
Most CI servers set it automatically.
Failed to compile.
./src/components/form.component.js
  Line 1:17:  'Component' is defined but never used  no-unused-vars
./src/App.js
  Line 2:8:    'logo' is defined but never used              no-unused-vars
  Line 8:7:    'API_key' is assigned a value but never used  no-unused-vars
  Line 37:5:   Expected a default case                       default-case
  Line 53:14:  Expected '===' and instead saw '=='           eqeqeq
  Line 69:20:  Expected '===' and instead saw '=='           eqeqeq
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: `react-scripts build`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/travis/.npm/_logs/2020-06-30T17_45_07_887Z-debug.log
The command "npm run build" exited with 1.
cache.2
store build cache

I added env variable in .travis.yml file.

env:
    process.env.CI : false

Still its showing the same error.

Can anyone help me out of this situation please...

Answer 1

  "scripts": {
    "start": "react-scripts start",
    "build": "CI=false && react-scripts build",  // Add CI=False here
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },

Answer 2

For me the solution was:

env: 
  CI: false