Angular CLI 升級 6.0 之後遇到的問題
阿新 • • 發佈：2018-05-19
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Angular CLI 1.7.4 在使用 ng build --prod 會構建失敗，而 ng build 是正常的。比較好的解決辦法是使用 ng build --prod --extract-license=false 或者 ng build --prod --no-extract-license。
最近將 Angular CLI 升級到 6.X 之後，直接 ng build 會報以下錯誤，ng serve 也是如此。
95% emitting LicenseWebpackPlugin(node:6252) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, open 'D:\X\project\Angular-examples\angular-test\node_modules\_@[email protected]@@angular\package.json' at Object.fs.openSync (fs.js:646:18) at Object.fs.readFileSync (fs.js:551:33) at LicenseExtractor.readPackageJson (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\LicenseExtractor.js:126:23) at LicenseExtractor.parsePackage (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\LicenseExtractor.js:23:32) at ModuleProcessor.processPackage (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\ModuleProcessor.js:39:46) at ModuleProcessor.processFile (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\ModuleProcessor.js:36:21) at fileCallback (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\LicenseWebpackPlugin.js:101:61) at moduleCallback (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\LicenseWebpackPlugin.js:108:21) at D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\LicenseWebpackPlugin.js:120:29 at Array.forEach (<anonymous>) at emitCallback (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@license-webpack-plugin\dist\LicenseWebpackPlugin.js:86:32) at _err0 (eval at create (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@tapable\lib\HookCodeFactory.js:24:12), <anonymous>:19:1) at callback (D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@copy-webpack-plugin\dist\index.js:77:17) at D:\X\project\Angular-examples\angular-test\node_modules\[email protected]@copy-webpack-plugin\dist\index.js:118:24 at <anonymous> (node:6252) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1) (node:6252) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
但是使用 ng build --prod 是正常的。同樣地，使用 ng build --extract-license=false 也可以解決問題。
簡單看一下，問題是由 license-webpack-plugin 插件引起的。這款插件用於輸出第三方插件的許可協議。老外比較重視版權吧。但是不知道為什麽總是在這個地方出問題。
Angular CLI 升級 6.0 之後遇到的問題