Firebase部署遇意外错误，本地测试正常，已更新依赖仍未解决

结合你遇到的情况和提供的调试日志，我给你几个实际可行的排查和解决办法：

1. 优先升级firebase-tools到最新版本 #

看你的调试日志，当前用的CLI版本是3.18.4，这是2018年的旧版本了，里面肯定存在不少已经修复的部署bug。赶紧执行下面的命令升级：

npm install -g firebase-tools@latest

升级完之后，最好重新登录一下Firebase账号，避免缓存的权限问题：

firebase logout
firebase login

然后再尝试部署，大概率能解决这个莫名其妙的错误。

2. 确认项目ID完全正确 #

日志里显示你部署的项目ID是stashit-7885bob，去Firebase控制台核对一下，确保这个ID和你项目的实际ID完全一致，别出现拼写错误或者大小写问题（虽然Firebase项目ID是小写，但还是要确认）。

3. 清理functions的依赖缓存重新安装 #

有时候本地依赖的缓存会导致部署时的兼容性问题，你可以试试：

1. 进入functions目录：cd functions
2. 删除node_modules文件夹和package-lock.json文件
3. 重新安装依赖：npm install
   完成后回到项目根目录再执行部署命令试试。

4. 检查Google Cloud的API权限 #

虽然日志里说必要API已经启用，但有时候CLI的检测可能不准。你可以手动登录Google Cloud控制台，找到你的项目，确认Cloud Functions API和Runtime Config API确实是启用状态，同时确保你的账号拥有项目的部署权限（比如Editor以上的角色）。

你的问题背景 #

本地用firebase serve --only functions,hosting测试时一切正常，但执行firebase deploy或者指定部署functions和hosting时，却只弹出一句“Error: An unexpected error has occurred.”，没有更多详细提示。

之前已经按照官方提示更新了相关依赖：

• npm install firebase-functions@latest --save
• npm install firebase-admin@5.11.0 --save
• npm install -g firebase-tools
  而且也没有使用什么特殊的新特性。

调试输出（firebase deploy --debug） #

[debug] [2018-05-14T18:59:35.734Z] ----------------------------------------------------------------------
[debug] [2018-05-14T18:59:35.739Z] Command: C:\Program Files\nodejs\node.exe C:\Users\Sushanth\AppData\Roaming\npm\node_modules\firebase-tools\bin\firebase deploy --only functions,hosting
[debug] [2018-05-14T18:59:35.740Z] CLI Version: 3.18.4
[debug] [2018-05-14T18:59:35.740Z] Platform: win32
[debug] [2018-05-14T18:59:35.740Z] Node Version: v8.10.0
[debug] [2018-05-14T18:59:35.741Z] Time: Tue May 15 2018 00:29:35 GMT+0530 (India Standard Time)
[debug] [2018-05-14T18:59:35.741Z] ----------------------------------------------------------------------
[debug]
[debug] [2018-05-14T18:59:35.759Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[debug] [2018-05-14T18:59:35.762Z] > authorizing via signed-in user
[debug] [2018-05-14T18:59:35.765Z] > refreshing access token with scopes: ["email","https://www.googleapis.com/auth/cloud-platform","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","openid"]
[debug] [2018-05-14T18:59:35.766Z] >>> HTTP REQUEST POST https://www.googleapis.com/oauth2/v3/token { refresh_token: '1/V2t23LrBy9dznRfmTQnnh-0x3k3RrWFiA2EbNwRErOU', client_id: '563584335869-fgrhgmd47bqnekij5i8b5pr03ho849e6.apps.googleusercontent.com', client_secret: 'j9iVZfS8kkCEFUPaAeJV0sAi', grant_type: 'refresh_token', scope: 'email https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/cloudplatformprojects.readonly https://www.googleapis.com/auth/firebase openid' }
Tue May 15 2018 00:29:35 GMT+0530 (India Standard Time)
[debug] [2018-05-14T18:59:36.385Z] <<< HTTP RESPONSE 200
[debug] [2018-05-14T18:59:36.393Z] >>> HTTP REQUEST GET https://admin.firebase.com/v1/projects/stashit-7885bob
Tue May 15 2018 00:29:36 GMT+0530 (India Standard Time)
[debug] [2018-05-14T18:59:37.606Z] <<< HTTP RESPONSE 200
[debug] [2018-05-14T18:59:37.607Z] >>> HTTP REQUEST GET https://admin.firebase.com/v1/database/stashit-7885bob/tokens
Tue May 15 2018 00:29:37 GMT+0530 (India Standard Time)
[debug] [2018-05-14T18:59:38.662Z] <<< HTTP RESPONSE 200
[info]
[info] === Deploying to 'stashit-7885bob'...
[info]
[info] i deploying functions, hosting
[debug] [2018-05-14T18:59:46.087Z] > [functions] package.json contents: {
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase serve --only functions",
    "shell": "firebase experimental:functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "dependencies": {
    "body-parser": "^1.18.2",
    "cookie-parser": "^1.4.3",
    "cors": "^2.8.4",
    "ejs": "^2.5.9",
    "express": "^4.16.3",
    "firebase": "^5.0.2",
    "firebase-admin": "^5.11.0",
    "firebase-functions": "^1.0.2"
  },
  "private": true
}
[info] i functions: ensuring necessary APIs are enabled...
[debug] [2018-05-14T18:59:46.087Z] >>> HTTP REQUEST GET https://servicemanagement.googleapis.com/v1/services/cloudfunctions.googleapis.com/projectSettings/stashit-7885bob?view=CONSUMER_VIEW
Tue May 15 2018 00:29:46 GMT+0530 (India Standard Time)
[debug] [2018-05-14T18:59:46.092Z] >>> HTTP REQUEST GET https://servicemanagement.googleapis.com/v1/services/runtimeconfig.googleapis.com/projectSettings/stashit-7885bob?view=CONSUMER_VIEW
Tue May 15 2018 00:29:46 GMT+0530 (India Standard Time)
[debug] [2018-05-14T18:59:48.558Z] <<< HTTP RESPONSE 200
[debug] [2018-05-14T18:59:48.586Z] <<< HTTP RESPONSE 200
[info] + functions: all necessary APIs are enabled
[debug] [2018-05-14T18:59:48.588Z] >>> HTTP REQUEST GET https://cloudresourcemanager.googleapis.com/v1/projects/stashit-7885bob

内容的提问来源于stack exchange，提问作者bobby.dreamer