Trying to deploy my React app with gh-pages but got this error message : The “file” argument must be of type string. Received type undefined

Question

I was trying to deploy my React app with gh-pages but I'm facing this error : The "file" argument must be of type string. Received type undefined.

At first, I thought it was my code so I've made another create-react-app with no modification, trying to deploy with npm run deploy command but got this error message again.

My package.json (I've added my homepage link, the predeploy and deploy scripts, and the gh-pages dependency) :

  "name": "test-deploy",
  "version": "0.1.0",
  "private": true,
  "homepage": "https://vnsteven.github.io/test-deploy/",
  "dependencies": {
    "gh-pages": "^2.1.0",
    "react": "^16.8.6",
    "react-dom": "^16.8.6",
    "react-scripts": "3.0.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "predeploy": "npm run build",
    "deploy": "gh-pages -d build"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

Error output:

> npm run build


> test-deploy@0.1.0 build /Users/vansteven/Desktop/test-deploy
> react-scripts build

Creating an optimized production build...
Compiled successfully.

File sizes after gzip:

  36.44 KB  build/static/js/2.b41502e9.chunk.js
  770 B     build/static/js/runtime~main.90bc13d1.js
  601 B     build/static/js/main.74c1ab4e.chunk.js
  517 B     build/static/css/main.2cce8147.chunk.css

The project was built assuming it is hosted at /test-deploy/.
You can control this with the homepage field in your package.json.

The build folder is ready to be deployed.
To publish it at https://vnsteven.github.io/test-deploy/ , run:

  yarn run deploy

> test-deploy@0.1.0 deploy /Users/vansteven/Desktop/test-deploy
> gh-pages -d build

The "file" argument must be of type string. Received type undefined
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! test-deploy@0.1.0 deploy: `gh-pages -d build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the test-deploy@0.1.0 deploy 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!     /Users/vansteven/.npm/_logs/2019-08-01T17_48_50_611Z-debug.log

le shell a retourné 1

Logs:

1 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'run', 'deploy' ]
2 info using npm@6.9.0
3 info using node@v10.16.0
4 verbose run-script [ 'predeploy', 'deploy', 'postdeploy' ]
5 info lifecycle test-deploy@0.1.0~predeploy: test-deploy@0.1.0
6 verbose lifecycle test-deploy@0.1.0~predeploy: unsafe-perm in lifecycle true
7 verbose lifecycle test-deploy@0.1.0~predeploy: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/vansteven/Desktop/test-deploy/node_modules/.bin:/Users/vansteven/.rvm/gems/ruby-2.5.1/bin:/Users/vansteven/.rvm/gems/ruby-2.5.1@global/bin:/Users/vansteven/.rvm/rubies/ruby-2.5.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/vansteven/.rvm/bin
8 verbose lifecycle test-deploy@0.1.0~predeploy: CWD: /Users/vansteven/Desktop/test-deploy
9 silly lifecycle test-deploy@0.1.0~predeploy: Args: [ '-c', 'npm run build' ]
10 silly lifecycle test-deploy@0.1.0~predeploy: Returned: code: 0  signal: null
11 info lifecycle test-deploy@0.1.0~deploy: test-deploy@0.1.0
12 verbose lifecycle test-deploy@0.1.0~deploy: unsafe-perm in lifecycle true
13 verbose lifecycle test-deploy@0.1.0~deploy: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/vansteven/Desktop/test-deploy/node_modules/.bin:/Users/vansteven/.rvm/gems/ruby-2.5.1/bin:/Users/vansteven/.rvm/gems/ruby-2.5.1@global/bin:/Users/vansteven/.rvm/rubies/ruby-2.5.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/vansteven/.rvm/bin
14 verbose lifecycle test-deploy@0.1.0~deploy: CWD: /Users/vansteven/Desktop/test-deploy
15 silly lifecycle test-deploy@0.1.0~deploy: Args: [ '-c', 'gh-pages -d build' ]
16 silly lifecycle test-deploy@0.1.0~deploy: Returned: code: 1  signal: null
17 info lifecycle test-deploy@0.1.0~deploy: Failed to exec deploy script
18 verbose stack Error: test-deploy@0.1.0 deploy: `gh-pages -d build`
18 verbose stack Exit status 1
18 verbose stack     at EventEmitter.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:301:16)
18 verbose stack     at EventEmitter.emit (events.js:198:13)
18 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
18 verbose stack     at ChildProcess.emit (events.js:198:13)
18 verbose stack     at maybeClose (internal/child_process.js:982:16)
18 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:259:5)
19 verbose pkgid test-deploy@0.1.0
20 verbose cwd /Users/vansteven/Desktop/test-deploy
21 verbose Darwin 16.7.0
22 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "deploy"
23 verbose node v10.16.0
24 verbose npm  v6.9.0
25 error code ELIFECYCLE
26 error errno 1
27 error test-deploy@0.1.0 deploy: `gh-pages -d build`
27 error Exit status 1
28 error Failed at the test-deploy@0.1.0 deploy script.
28 error This is probably not a problem with npm. There is likely additional logging output above.
29 verbose exit [ 1, true ]

This error message comes from my brand new React application. Only my package.json has been modified.

Answer 1

Seems like a bug in gh-pages 2.1.

I solved mine by downgrading gh-pages to version 2.0:

yarn add gh-pages@2.0 -D` // or

npm install -D gh-pages@2.0

Answer 2

Update: Fixed in gh-pages@2.1.1 . You can now update your gh-pages package to latest version to fix this.

npm i gh-pages@latest

---

If you don't wish to downgrade to version 2.0.1 , the workaround is to instead of using "deploy": "gh-pages -d build" as your deploy script, use:

"deploy": "gh-pages -d build --git git"

This somehow fixes the problem.

You can find the GitHub issue about this bug here: tschaub/gh-pages#308

Answer 3

Whenever you start your program, you use npm start . This can be used for Deploy too. Instead of doing npm run deploy , the command should be npm deploy .