circle ciで「npm run build」ができない

Question

React+TypeScriptで作成したアプリを、Circle CIを用いてGCPのAppEngineに自動デプロイしようとしています。

以下はconfig.ymlです。

version: 2
jobs:
  deploy:
    docker:
      - image: circleci/node:lts-browsers
    steps:
      - checkout
      - run: npm install
      - run: npm run build
      - run: gcloud app deploy --no-promote --version $CIRCLE_SHA1 --quiet
workflows:
  version: 2
  deploy:
    jobs:
      - deploy

しかし、npm run buildの部分で以下のようなログが発生します。

#!/bin/bash -eo pipefail
npm run build

> firebase-react-auth@0.1.0 build /home/circleci/project
> react-scripts build


There might be a problem with the project dependency tree.
It is likely not a bug in Create React App, but something you need to fix locally.

The react-scripts package provided by Create React App requires a dependency:

  "babel-jest": "^24.9.0"

Don't try to install it manually: your package manager does it automatically.
However, a different version of babel-jest was detected higher up in the tree:

  /home/circleci/project/node_modules/babel-jest (version: 26.6.3) 

Manually installing incompatible versions is known to cause hard-to-debug issues.

If you would prefer to ignore this check, add SKIP_PREFLIGHT_CHECK=true to an .env file in your project.
That will permanently disable this message but you might encounter other issues.

To fix the dependency tree, try following the steps below in the exact order:

  1. Delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
  2. Delete node_modules in your project folder.
  3. Remove "babel-jest" from dependencies and/or devDependencies in the package.json file in your project folder.
  4. Run npm install or yarn, depending on the package manager you use.

In most cases, this should be enough to fix the problem.
If this has not helped, there are a few other things you can try:

  5. If you used npm, install yarn (http://yarnpkg.com/) and repeat the above steps with it instead.
     This may help because npm has known issues with package hoisting which may get resolved in future versions.

  6. Check if /home/circleci/project/node_modules/babel-jest is outside your project directory.
     For example, you might have accidentally installed something in your home folder.

  7. Try running npm ls babel-jest in your project folder.
     This will tell you which other package (apart from the expected react-scripts) installed babel-jest.

If nothing else helps, add SKIP_PREFLIGHT_CHECK=true to an .env file in your project.
That would permanently disable this preflight check in case you want to proceed anyway.

P.S. We know this message is long but please read the steps above :-) We hope you find them helpful!

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! firebase-react-auth@0.1.0 build: `react-scripts build`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the firebase-react-auth@0.1.0 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/circleci/.npm/_logs/2020-12-29T14_31_38_888Z-debug.log


Exited with code exit status 1
CircleCI received exit code 1

これはどのように解決すればいいのでしょうか？
エラー解決のstepが記されていますが、circle ciの場合どうすればいいのかがわかりません。(ローカルの場合はstep通りにやればいいのはわかるのですが...)

また、普通にローカル環境でのnpm run buildやgcloud app deployはできます。

config.ymlに関しての知識が乏しいのは理解しているのですが、ローカルでできるnpm run buildがcircle ciだとできないので困惑しています。

何かいい解決策はありますか？

Answer 1

エラーメッセージに全て書いてあります。マジです。ローカルでやってることを CirclCI の yaml に書き下せばよいだけです。例えば「package-lock.json 消せ」って書いてあるところは

...
    steps:
      - checkout
      - run: rm package-lock.json
      - run: npm install
      - run: npm run build
...

と書き足せばよかろうなのです。毎行書き足すのもめんどくさいと思うので && でコマンドつなげておくと捗るでしょう。