React-Native - 錯誤：ReferenceError：未計算文件 metro/src/lib/polyfills/require.js 的 SHA-1

Question

我在 react-native 中遇到此錯誤，並且該項目無法使用 android 仿真器啟動。 我沒有使用 Expo，並嘗試清理 gradlew 並刪除 node_modules 並查看它是否有一些錯誤，但對我沒有任何幫助。

這是我的錯誤日志：

error: ReferenceError: SHA-1 for file /home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/lib/polyfills/require.js (/home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/lib/polyfills/require.js) is not computed
    at DependencyGraph.getSha1 (/home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/node-haste/DependencyGraph.js:263:13)
    at /home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:211:26
    at Generator.next (<anonymous>)
    at asyncGeneratorStep (/home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:46:24)
    at _next (/home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:66:9)
    at /home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:71:7
    at new Promise (<anonymous>)
    at /home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:63:12
    at Transformer.transformFile (/home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/DeltaBundler/Transformer.js:236:7)
    at /home/logan/.nvm/versions/node/v12.16.1/lib/node_modules/react-native/node_modules/metro/src/Bundler.js:87:34

Answer 1

我在 metro/src/node-haste/DependencyGraph.js 中使用過它，但我不知道它是否是最好的解決方案，因為如果我再次刪除 node_modules，我會丟失它：

    if (!sha1) {
      return getFileHash(resolvedPath)
      function getFileHash(file) {
        return require('crypto')
          .createHash('sha1')
          .update(fs.readFileSync(file))
          .digest('hex')
      }
    }