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Yarn 2: `Error: Failed to load config "xo/esnext" to extend from.`

See original GitHub issue

I am upgrading to Yarn 2 and I am now getting the following error

Error: Failed to load config "xo/esnext" to extend from.
Referenced from: BaseConfig
    at configMissingError (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-array-factory.js:265:9)
    at ConfigArrayFactory._loadExtendedShareableConfig (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-array
-factory.js:826:23)
    at ConfigArrayFactory._loadExtends (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-array-factory.js:731:
25)
    at ConfigArrayFactory._normalizeObjectConfigDataBody (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-arr
ay-factory.js:660:25)
    at _normalizeObjectConfigDataBody.next (<anonymous>)
    at ConfigArrayFactory._normalizeObjectConfigData (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-array-f
actory.js:596:20)
    at _normalizeObjectConfigData.next (<anonymous>)
    at createConfigArray (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-array-factory.js:340:25)
    at ConfigArrayFactory.create (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/config-array-factory.js:395:16)
    at createBaseConfigArray (/project/.yarn/cache/eslint-npm-6.8.0-d27045f313-1.zip/node_modules/eslint/lib/cli-engine/cascading-config-array-factory.js:86:4
8)

I am only extending xo-typescript in my XO config and this error only started occurring after using Yarn 2. I believe the error is due to Yarn 2’s “strict package boundaries”.

Packages aren’t allowed to require other packages unless they actually list them in their dependencies. This is in line with the changes we made back when we introduced Plug’n’Play more than a year ago, and we’re happy to say that the work we’ve been doing with the top maintainers of the ecosystem have been fruitful. Nowadays, very few packages still have compatibility issues with this rule. source Whatever is requiring xo/esnext doesn’t have it listed in their dependencies and is failing.

Issue Analytics

State:
Created 4 years ago
Reactions:6
Comments:8 (3 by maintainers)

Top GitHub Comments

4reactions

anderskcommented, Nov 8, 2020

A workaround for Yarn 2 is to add all the relevant ESLint config packages and plugins as direct devDependencies of your project, e.g.

yarn add -D eslint eslint-config-xo eslint-plugin-{ava,eslint-comments,import,no-use-extend-native,node,promise,unicorn}

Probably relevant: yarnpkg/berry#8, eslint/eslint#3458.

3reactions

floer32commented, Dec 15, 2020

weirdly, i only have this issue inside of JetBrains IDEs. (I haven’t tested everywhere.) I’ve tried various ways of installing and picking which bin to use (local vs global, different versions, etc). And consistently, it works in the terminal but not in my IDE.

So I’m guessing there’s something dependent on shell or env var shenanigans. (At least, if also using fnm or other things like that)

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