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Error: jest-haste-map: Haste module naming collision:

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I have created a custom npm module (will use xxx instead of its name) and link it manually using npm install.

I tried very hard and searched :

before raising a question. I would be thankful if someone tell me what wrong with my code or my approach or any error in my code.

When I run react-native run-android following error is raised by metro bundler

Error: jest-haste-map: Haste module naming collision:
  Duplicate module name: react-native
  Paths: E:\cdg-native\CDG\node_modules\react-native-XXX\node_modules\react-native\package.json collides with E:\cdg-native\CDG\node_modules\react-native\package.json

This error is caused by `hasteImpl` returning the same name for different files.

My custom module package.json is

{
  "name": "react-native-xxx",
  "version": "1.0.0",
  "description": "Library to render xxx",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\"&& exit 1"
  },
  "keywords": [
    "react native xxx"
  ],
  "author": "Firdous Nath",
  "license": "ISC",
  "peerDependencies": {
    "react": "*",
    "react-native": "*"
  },
  "devDependencies": {
    "react": "^16.6.1",
    "react-native": "^0.57.5",
    "babel-cli": "^6.26.0",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "babel-plugin-transform-object-rest-spread": "^6.26.0",
    "babel-plugin-transform-runtime": "^6.23.0",
    "babel-preset-env": "^1.6.1",
    "babel-preset-react": "^6.24.1"
  }
}

index.js of the custom module is very simple as below

import React from "react";
import { Text } from "react-native";

export default class XXXView extends React.Component {

    render() {
        return (
            <Text> From custom module </Text>
        );
    }
}

file where I am using custom module is

import React from "react";
import {StyleSheet, View} from "react-native";
import XXXView from "react-native-xxx"
//import {XXXView} from "react-native-xxx" -> I tried this as well

export default class App extends React.Component {
    render() {
        return (
            <View style={styles.container}>
                <XXXView/>
            </View>
        )
    }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: "center",
        alignItems: "center",
        backgroundColor: "#f5fcff"
    }
});

I tried npm install /absolute/path/to/xxx and it linked module correctly. By correctly I mean I can see react-native-xxx package in nodemodule directory. I did all possible ways but nothing worked.

I also tried but got no success

  • yarn add /absolute/path/to/react-native-xxx
  • react-native link react-native-xxx
  • react-native run-android

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