angular - 在生产模式下将 Angular 部署到 Heroku

Question

很抱歉，如果这个问题已经在某个地方得到了回答。

我能够将 Angular 应用程序部署到 heroku，但尽管采取了本文中的步骤，它仍无法在生产模式下运行。

https://medium.com/@hellotunmbi/how-to-deploy-angular-application-to-heroku-1d56e09c5147

我们在环境文件夹中有两个文件:

• 环境.prod.ts
• 环境.ts

从本质上讲，Heroku 似乎使用了名为 environment.ts 的第二个环境文件，而不是使用 environment.prod.ts

在environment.ts中，有一个env变量:

// This file can be replaced during build by using the `fileReplacements` array.
// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
// The list of file replacements can be found in `angular.json`.

export const environment = {

  production: false,

};

fileReplacements 也已正确设置。

environment.prod.ts 文件也包含变量 production 并且值为 true。

我们知道这不是使用以下简单代码的生产模式:

export class SettingsComponent implements OnInit {

  environmentIsProduction: boolean = false;

  constructor() {

  }

  ngOnInit() {
    this.environmentIsProduction = environment.production;
    console.warn('Environment is PRODUCTION: ' + environment.production);
  }

}

是否有人可以就我们可能忘记的步骤提出建议？

这是整个 package.json 文件

{
  "name": "angular-frontend",
  "version": "0.0.0",
  "engines": {
    "node": "8.11.2",
    "npm": "6.2.0"
  },
  "scripts": {
    "ng": "ng",
    "start": "node server.js",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "postinstall": "ng build --aot --prod"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.1.0",
    "@angular/cdk": "^7.2.1",
    "@angular/cli": "~6.2.3",
    "@angular/common": "^6.1.0",
    "@angular/compiler": "^6.1.0",
    "@angular/compiler-cli": "^6.1.0",
    "@angular/core": "^6.1.0",
    "@angular/forms": "^6.1.0",
    "@angular/http": "^6.1.0",
    "@angular/platform-browser": "^6.1.0",
    "@angular/platform-browser-dynamic": "^6.1.0",
    "@angular/router": "^6.1.0",
    "@ng-bootstrap/ng-bootstrap": "^3.2.2",
    "@swimlane/ngx-datatable": "^14.0.0",
    "angular-notifier": "^4.1.1",
    "angular-svg-icon": "^7.0.1",
    "angularx-social-login": "^1.2.6",
    "bootstrap": "^4.1.3",
    "core-js": "^2.5.4",
    "express": "^4.16.4",
    "flag-icon-css": "^3.3.0",
    "jquery": "^1.9.1",
    "jw-bootstrap-switch-ng2": "^2.0.2",
    "ng-connection-service": "^1.0.4",
    "ng-pick-datetime": "^6.0.16",
    "ng2-currency-mask": "^5.3.1",
    "ng2-nouislider": "^1.7.12",
    "ngx-bootstrap": "^3.0.1",
    "ngx-flag-icon-css": "^1.0.1",
    "ngx-webstorage-service": "^3.1.1",
    "nouislider": "^11.0.0",
    "path": "^0.12.7",
    "popper.js": "^1.14.4",
    "rellax": "^1.7.0",
    "rxjs": "~6.2.0",
    "typescript": "~2.9.2",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.8.0",
    "@angular/cli": "~6.2.3",
    "@angular/compiler-cli": "^6.1.0",
    "@angular/language-service": "^6.1.0",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.3.0",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~2.9.2"
  }
}

Answer 1

我希望这对某人有帮助......

终于找到解决方案:https://devcenter.heroku.com/articles/nodejs-support#heroku-specific-build-steps

在 package.json 中，有必要更改以下行:

"postinstall": "ng build --aot --prod"

到

"heroku-postbuild": "ng build --configuration=production"

虽然原始命令确实经历了生产构建和文件名混淆等所有步骤，修剪......然后它随后运行正常的 ng 构建。

在部署到 Heroku 期间，我在日志中注意到了这种行为。

一旦使用 heroku-postbuild，构建只发生一次......用于生产。