How to use Babel Module Resolver with react-native+expo on publication?

Question

Here is my last version of my .babelrc file :

{
      "presets": ["babel-preset-expo"],
      "env": {
        "development": {
          "plugins": ["transform-react-jsx-source"]
        }
      },
      "plugins": [
        ["module-resolver", {
          "root": ["./src"],
          "alias": {
            "$components": "./src/components",
            "$screens": "./src/screens",
            "$stores": "./src/stores",
            "$utils": "./src/utils",
            "$services": "./src/services",
            "$assets": "./assets",
          }
        }]
      ]
    }

I tried to change many things but expo doesn't want to publish the app and display an error 500 during the publication when it meet the first import on the Main.js file :

import stores from 'stores';

And the error :

500 - "{\"originModulePath\":\"/Users/jhirsch/Code/kliner/app-client/src/Main.js\",\"targetModuleName\":\"stores\",\"message\":\"Unable to resolve module `stores` from `/Users/jhirsch/Code/kliner/app-client/src/Main.js`: Module `stores` does not exist in the Haste module map\\n\\nThis might be related to https://github.com/facebook/react-native/issues/4968\\nTo resolve try the following:\\n  1. Clear watchman watches: `watchman watch-del-all`.\\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\\n  3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.\\n  4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`.\",\"errors\":[{\"description\":\"Unable to resolve module `stores` from `/Users/jhirsch/Code/kliner/app-client/src/Main.js`: Module `stores` does not exist in the Haste module map\\n\\nThis might be related to https://github.com/facebook/react-native/issues/4968\\nTo resolve try the following:\\n  1. Clear watchman watches: `watchman watch-del-all`.\\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\\n  3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.\\n  4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`.\"}],\"name\":\"Error\",\"stack\":\"Error: Unable to resolve module `stores` from `/Users/jhirsch/Code/kliner/app-client/src/Main.js`: Module `stores` does not exist in the Haste module map\\n\\nThis might be related to https://github.com/facebook/react-native/issues/4968\\nTo resolve try the following:\\n  1. Clear watchman watches: `watchman watch-del-all`.\\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\\n  3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.\\n  4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`.\\n    at ModuleResolver.resolveDependency (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:209:1301)\\n    at ResolutionRequest.resolveDependency (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/node-haste/DependencyGraph/ResolutionRequest.js:83:16)\\n    at DependencyGraph.resolveDependency (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/node-haste/DependencyGraph.js:238:485)\\n    at Object.resolve (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/lib/transformHelpers.js:180:25)\\n    at dependencies.map.result (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/DeltaBundler/traverseDependencies.js:311:29)\\n    at Array.map (<anonymous>)\\n    at resolveDependencies (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/DeltaBundler/traverseDependencies.js:307:16)\\n    at /Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/DeltaBundler/traverseDependencies.js:164:33\\n    at Generator.next (<anonymous>)\\n    at step (/Users/jhirsch/Code/kliner/app-client/node_modules/metro/src/DeltaBundler/traverseDependencies.js:266:307)\"}"
    ERROR
    15:45
    Unable to resolve "stores" from "src/Main.js"

Do you have an idea or an alternative to resolve the aliases with expo? It's strange because it's functionnal when i run the app on local simulator.

Answer 1

Finally .babelrc works in this format :

{
  "presets": ["babel-preset-expo"],
  "plugins": [
    [
      "module-resolver",
      {
        "root": ["./"],
        "alias": {
          "@components": "./src/components",
          "@screens": "./src/screens",
          "@stores": "./src/stores",
          "@utils": "./src/utils",
          "@services": "./src/services",
          "@assets": "./assets",
          "@constants": "./src/constants"
        }
      },
    ],
  ],
}

And add '@' when i import :

import stores from '@stores';