Question

我克隆了meanjs repo并部署到heroku但是应用程序没有运行并显示以下错误：应用程序错误应用程序中发生错误，无法提供您的页面。如果您是应用程序所有者，请检查日志以获取详细信息。

检查日志，它说：

17-04-18T03:16:50.720375+00:00 app[web.1]:
2017-04-18T03:16:50.730925+00:00 app[web.1]: sh: 1: gulp: not found
2017-04-18T03:16:50.742737+00:00 app[web.1]: npm ERR! file sh
2017-04-18T03:16:50.743150+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2017-04-18T03:16:50.743568+00:00 app[web.1]: npm ERR! errno ENOENT

这是我的package.json文件：

{
  "name": "meanjs",
  "description": "Full-Stack JavaScript with MongoDB, Express, AngularJS, and Node.js.",
  "version": "0.5.0",
  "meanjs-version": "0.5.0",
  "private": false,
  "author": "https://github.com/meanjs/mean/graphs/contributors",
  "license": "MIT",
  "repository": {
    "type": "git",
    "url": "https://github.com/meanjs/mean.git"
  },
  "engines": {
    "node": ">=6.3.0",
    "npm": ">=3.10.8"
  },
  "scripts": {
    "update": "npm update && npm prune && bower install --allow-root && bower prune --allow-root",
    "clean": "rm -rf node_modules/ public/lib/",
    "reinstall": "npm cache clean && npm run clean && npm install",
    "start": "gulp",
    "start:prod": "gulp prod",
    "start:debug": "node-debug --web-host 0.0.0.0 server.js & gulp debug",
    "gulp": "gulp",
    "lint": "gulp lint",
    "test": "gulp test",
    "test:server": "gulp test:server",
    "test:server:watch": "gulp test:server:watch",
    "test:client": "gulp test:client",
    "test:e2e": "gulp test:e2e",
    "test:coverage": "gulp test:coverage",
    "postinstall": "bower install --allow-root && bower prune --allow-root",
    "generate-ssl-certs": "scripts/generate-ssl-certs.sh"
  },
  "dependencies": {
    "acl": "~0.4.10",
    "async": "~2.3.0",
    "body-parser": "~1.17.1",
    "bower": "~1.8.0",
    "chalk": "~1.1.3",
    "compression": "~1.6.2",
    "connect-flash": "~0.1.1",
    "connect-mongo": "~1.3.2",
    "cookie-parser": "~1.4.1",
    "crypto": "0.0.3",
    "express": "~4.15.2",
    "express-hbs": "^1.0.4",
    "express-session": "~1.15.2",
    "generate-password": "~1.3.0",
    "glob": "~7.1.1",
    "helmet": "~2.3.0",
    "jasmine-core": "~2.5.2",
    "lodash": "~4.17.4",
    "lusca": "~1.4.1",
    "method-override": "~2.3.8",
    "mocha": "~3.2.0",
    "mongoose": "~4.9.3",
    "morgan": "~1.8.1",
    "multer": "~1.3.0",
    "nodemailer": "~2.6.4",
    "owasp-password-strength-test": "~1.3.0",
    "passport": "~0.3.2",
    "passport-facebook": "~2.1.1",
    "passport-github": "~1.1.0",
    "passport-google-oauth": "~1.0.0",
    "passport-linkedin": "~1.0.0",
    "passport-local": "~1.0.0",
    "passport-paypal-openidconnect": "~0.1.1",
    "passport-twitter": "~1.0.4",
    "serve-favicon": "~2.4.2",
    "socket.io": "^1.7.3",
    "validator": "~7.0.0",
    "winston": "^2.3.1",
    "wiredep": "~4.0.0"
  },
  "devDependencies": {
    "coveralls": "~2.13.0",
    "del": "^2.2.2",
    "eslint": "~2.2.0",
    "eslint-config-airbnb": "~6.0.2",
    "gulp": "~3.9.1",
    "gulp-angular-templatecache": "~2.0.0",
    "gulp-autoprefixer": "~3.1.0",
    "gulp-concat": "~2.6.0",
    "gulp-csslint": "~1.0.0",
    "gulp-csso": "~3.0.0",
    "gulp-eslint": "~3.0.1",
    "gulp-imagemin": "~3.2.0",
    "gulp-istanbul": "~1.1.1",
    "gulp-less": "~3.3.0",
    "gulp-load-plugins": "~1.5.0",
    "gulp-mocha": "~3.0.1",
    "gulp-ng-annotate": "~2.0.0",
    "gulp-nodemon": "~2.2.1",
    "gulp-protractor": "^3.0.0",
    "gulp-refresh": "~1.1.0",
    "gulp-rename": "~1.2.2",
    "gulp-rev": "^7.1.2",
    "gulp-sass": "~3.1.0",
    "gulp-uglify": "~2.1.2",
    "gulp-util": "~3.0.7",
    "imagemin-pngquant": "~5.0.0",
    "istanbul": "~0.4.2",
    "karma": "~1.6.0",
    "karma-chrome-launcher": "~2.0.0",
    "karma-coverage": "~1.1.1",
    "karma-firefox-launcher": "~1.0.0",
    "karma-jasmine": "~1.1.0",
    "karma-ng-html2js-preprocessor": "~1.0.0",
    "karma-phantomjs-launcher": "~1.0.0",
    "phantomjs-prebuilt": "~2.1.14",
    "lcov-result-merger": "~1.2.0",
    "run-sequence": "~1.2.2",
    "semver": "~5.3.0",
    "should": "~11.2.1",
    "supertest": "~2.0.0"
  }
}

出了什么问题？

Answer 1

Heroku将尝试detect the kind of application you're deploying。

要确定如何启动您的应用，Heroku首先会查找Procfile。如果Node.js应用程序不存在Procfile，我们将尝试启动默认web进程通过package.json中的start script。

我假设没有Procfile并且Heroku试图运行npm start。

您的start脚本只是默认的gulp任务，但由于没有安装gulp，因为它未在dependencies中列出，因此失败。

Heroku documentation about devDependencies

我们默认将NPM_CONFIG_PRODUCTION设置为 true 以进行安装仅限生产依赖。如果你想安装 devDependencies，您可以停用生产模式：
$ heroku config:set NPM_CONFIG_PRODUCTION=false
但是，因为您通常不希望所有开发依赖项你的生产版本，最好只移动依赖项你实际上需要生产构建（bower，grunt，gulp等） dependencies。

devDependencies应该只包含生产中不需要的依赖项。由于您的应用依赖于gulp以及大多数列出的插件，因此您需要将这些插件移至dependencies。

如Nathan in his answer所述，如果您不想移动devDependencies，可以使用poststart npm脚本卸载devDependencies。

"scripts": {
    "poststart": "npm prune --production"
    ...
}

Answer 2

我认为比将某些构建工具放入生产部署更清晰的解决方案是利用npm的postinstall钩子。使用它可以为构建过程加载devDependencies，然后在部署应用程序之前删除它们。请参阅我之前的帖子：

https://stackoverflow.com/a/42237745/673882

部署到heroku（找不到gulp错误）

2 个答案: