如何使用代码 0 退出“npm run start”？
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【中文标题】如何使用代码 0 退出“npm run start”？【英文标题】：How do I make "npm run start" exit with a code 0? 【发布时间】：2022-01-09 00:43:59 【问题描述】：我正在使用使用 React 和 JS 构建的应用程序。使用 Azure DevOps 构建 CI/CD 管道，以构建、测试应用程序并将其部署到 Azure 服务。
在我的 CI 管道中，我需要运行使用 Cypress 编写的功能测试。 “e2e:local”测试在 localhost 上托管的应用程序上运行。单独运行脚本“npm start”需要在终端中手动输入 (Ctrl+C) 以退出进程，因此在管道中作为独立步骤运行“npm start”将使其永远运行。因此，我使用“npm concurrently”来运行“npm run start”和功能测试“npm run e2e”local”。
"scripts":
"nx": "nx",
"start": "nx serve",
"build": "nx build",
"test": "nx test",
"e2e:local": "nx run haven-e2e:e2e --baseUrl=http://localhost:4200",
"e2e:localhost": "concurrently --kill-others \"npm run start\" \"npm run e2e:local\"
在我的本地机器上运行“npm run e2e:localhost”，在 localhost:4200 上为应用程序提供服务并运行功能测试。以下日志来自在本地机器上运行的脚本。
> Executing task: npm run e2e:localhost <
> didit-tech-challenge@0.0.0 e2e:localhost
> concurrently --success -k "npm run start" "npm run e2e:local"
[0]
[0] > challenge@0.0.0 start
[0] > nx serve
[0]
[1]
[1] > challenge@0.0.0 e2e:local
[1] > nx run haven-e2e:e2e --baseUrl=http://localhost:4200
[1]
[0]
[0] > nx run haven:serve
[1]
[1] > nx run haven-e2e:e2e --baseUrl=http://localhost:4200
[1]
[0] Starting type checking service...
[0] Using 6 workers with 2048MB memory limit
[0]
[0] > NX Web Development Server is listening at http://localhost:4200/
[0]
[1]
[1] ====================================================================================================
[1]
[1] (Run Starting)
[1]
[1] ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
[1] │ Cypress: 8.2.0 │
[1] │ Browser: Electron 89 │
[1] │ Specs: 1 found (functional/login.spec.ts) │
[1] └────────────────────────────────────────────────────────────────────────────────────────────────┘
[1]
[1]
[1] ────────────────────────────────────────────────────────────────────────────────────────────────────
[1]
[1] Running: functional/login.spec.ts (1 of 1)
[0] No type errors found
[0] Version: typescript 4.2.4
[0] Time: 14681ms
[0] Hash: 7f72c1685a3c8c11842f
[0] Built at: 12/02/2021 8:12:01 AM
[0] Entrypoint main [big] = runtime.js runtime.js.map vendor.js main.js main.js.map
[0] Entrypoint polyfills [big] = runtime.js runtime.js.map polyfills.js polyfills.js.map
[0] Entrypoint styles [big] = runtime.js runtime.js.map styles.js styles.js.map
[0] chunk main main.js, main.js.map (main) 696 KiB =runtime= =vendor= [initial] [rendered]
[0] chunk polyfills polyfills.js, polyfills.js.map (polyfills) 654 KiB =runtime= [initial] [rendered]
[0] chunk runtime runtime.js, runtime.js.map (runtime) 0 bytes =main= =polyfills= =styles= =vendor= [entry] [rendered]
[0] chunk styles styles.js, styles.js.map (styles) 1.87 MiB =runtime= [initial] [rendered]
[0] chunk vendor vendor.js (vendor) 1.42 MiB =main= =runtime= [initial] [rendered] split chunk (cache group: vendor) (name: vendor)
[1] Starting type checking service...
[1] Using 1 worker with 2048MB memory limit
[1] Starting type checking service...
[1] Using 1 worker with 2048MB memory limit
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /login from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[1] Warning: We failed processing this video.
[1]
[1] This error will not alter the exit code.
[1]
[1] TimeoutError: operation timed out
[1] at afterTimeout (C:\Users\AppData\Local\Cypress\Cache\8.2.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\timers.js:46:19)
[1] at Timeout.timeoutTimeout [as _onTimeout] (C:\Users\AppData\Local\Cypress\Cache\8.2.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\timers.js:76:13)
[1] at listOnTimeout (internal/timers.js:554:17)
[1] at processTimers (internal/timers.js:497:7)
[1]
[1]
[1] (Results)
[1]
[1] ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
[1] │ Tests: 1 │
[1] │ Passing: 1 │
[1] │ Failing: 0 │
[1] │ Pending: 0 │
[1] │ Skipped: 0 │
[1] │ Screenshots: 0 │
[1] │ Video: false │
[1] │ Duration: 2 seconds │
[1] │ Spec Ran: functional/login.spec.ts │
[1] └────────────────────────────────────────────────────────────────────────────────────────────────┘
[1]
[1]
[1] ====================================================================================================
[1]
[1] (Run Finished)
[1]
[1]
[1] Spec Tests Passing Failing Pending Skipped
[1] ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
[1] │ √ functional/login.spec.ts 00:02 1 1 - - - │
[1] └────────────────────────────────────────────────────────────────────────────────────────────────┘
[1] √ All specs passed! 00:02 1 1 - - -
[1]
[1]
[1] ———————————————————————————————————————————————
[1]
[1] > NX SUCCESS Running target "e2e" succeeded
[1]
[1]
[1] npm run e2e:local exited with code 0
--> Sending SIGTERM to other processes..
[0] npm run start exited with code 1
The terminal process "C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe -Command npm run e2e:localhost" terminated with exit code: 1.
Terminal will be reused by tasks, press any key to close it.
从日志中，作为“npm run start exited with code 1”，在 Azure DevOps CI 管道中运行相同的 npm 脚本会导致进程失败。下面的日志来自在 Azure DevOps Pipeline 上运行的脚本。 如何使用代码 0 使“npm run start”退出？
Starting: npm haven-e2e:local
==============================================================================
Task : npm
Description : Install and publish npm packages, or run an npm command. Supports npmjs.com and authenticated registries like Azure Artifacts.
Version : 1.187.0
Author : Microsoft Corporation
Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/package/npm
==============================================================================
/usr/local/bin/npm --version
8.1.0
/usr/local/bin/npm config list
; "env" config from environment
userconfig = "/home/vsts/work/1/npm/409.npmrc"
; node bin location = /usr/local/bin/node
; cwd = /home/vsts/work/1/s
; HOME = /home/vsts
; Run `npm config ls -l` to show all defaults.
/usr/local/bin/npm run e2e:localhost
> didit-tech-challenge@0.0.0 e2e:localhost
> concurrently --kill-others "npm run start" "npm run e2e:local"
[1]
[1] > didit-tech-challenge@0.0.0 e2e:local
[1] > nx run haven-e2e:e2e --baseUrl=http://localhost:4200
[1]
[0]
[0] > didit-tech-challenge@0.0.0 start
[0] > nx serve
[0]
[1]
[1] > nx run haven-e2e:e2e --baseUrl=http://localhost:4200
[0]
[0] > nx run haven:serve
[1] It looks like this is your first time using Cypress: 8.2.0
[1]
[1] [STARTED] Task without title.
[0] Starting type checking service...
[0] Using 1 worker with 2048MB memory limit
[0] (node:1989) [DEP0111] DeprecationWarning: Access to process.binding('http_parser') is deprecated.
[0] (Use `node --trace-deprecation ...` to show where the warning was created)
[0]
[0] > NX Web Development Server is listening at http://localhost:4200/
[0]
[0] (node:1989) [DEP0148] DeprecationWarning: Use of deprecated folder mapping "./" in the "exports" field module resolution of the package at /home/vsts/work/1/s/node_modules/postcss/package.json.
[0] Update this package.json to use a subpath pattern like "./*".
[1] [SUCCESS] Task without title.
[1]
[1] Opening Cypress...
[0] No type errors found
[0] Version: typescript 4.2.4
[0] Time: 12030ms
[0] Hash: c9337ccd5e2d5b163cd1
[0] Built at: 12/02/2021 10:45:15 AM
[0] Entrypoint main [big] = runtime.js runtime.js.map vendor.js main.js main.js.map
[0] Entrypoint polyfills [big] = runtime.js runtime.js.map polyfills.js polyfills.js.map
[0] Entrypoint styles [big] = runtime.js runtime.js.map styles.js styles.js.map
[0] chunk main main.js, main.js.map (main) 695 KiB =runtime= =vendor= [initial] [rendered]
[0] chunk polyfills polyfills.js, polyfills.js.map (polyfills) 654 KiB =runtime= [initial] [rendered]
[0] chunk runtime runtime.js, runtime.js.map (runtime) 0 bytes =main= =polyfills= =styles= =vendor= [entry] [rendered]
[0] chunk styles styles.js, styles.js.map (styles) 1.87 MiB =runtime= [initial] [rendered]
[0] chunk vendor vendor.js (vendor) 1.42 MiB =main= =runtime= [initial] [rendered] split chunk (cache group: vendor) (name: vendor)
[1]
[1] ================================================================================
[1]
[1] (Run Starting)
[1]
[1] tput: No value for $TERM and no -T specified
[1] ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
[1] │ Cypress: 8.2.0 │
[1] │ Browser: Electron 89 │
[1] │ Specs: 1 found (functional/login.spec.ts) │
[1] └────────────────────────────────────────────────────────────────────────────────────────────────┘
[1]
[1]
[1] ────────────────────────────────────────────────────────────────────────────────────────────────────
[1]
[1] Running: functional/login.spec.ts (1 of 1)
[1] Starting type checking service...
[1] Using 1 worker with 2048MB memory limit
[1] Starting type checking service...
[1] Using 1 worker with 2048MB memory limit
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /health from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[0] [HPM] Error occurred while trying to proxy request /login from localhost:4200 to http://localhost:3000 (ECONNREFUSED) (https://nodejs.org/api/errors.html#errors_common_system_errors)
[1]
[1] (Results)
[1]
[1] ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
[1] │ Tests: 1 │
[1] │ Passing: 1 │
[1] │ Failing: 0 │
[1] │ Pending: 0 │
[1] │ Skipped: 0 │
[1] │ Screenshots: 0 │
[1] │ Video: true │
[1] │ Duration: 3 seconds │
[1] │ Spec Ran: functional/login.spec.ts │
[1] └────────────────────────────────────────────────────────────────────────────────────────────────┘
[1]
[1]
[1] (Video)
[1]
[1] - Started processing: Compressing to 32 CRF
[1] - Finished processing: /home/vsts/work/1/s/dist/cypress/apps/haven-e2e/videos/func (2 seconds)
[1] tional/login.spec.ts.mp4
[1]
[1]
[1] ================================================================================
[1]
[1] (Run Finished)
[1]
[1]
[1] tput: No value for $TERM and no -T specified
[1] Spec Tests Passing Failing Pending Skipped
[1] ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
[1] │ ✔ functional/login.spec.ts 00:03 1 1 - - - │
[1] └────────────────────────────────────────────────────────────────────────────────────────────────┘
[1] ✔ All specs passed! 00:03 1 1 - - -
[1]
[1]
[1] ———————————————————————————————————————————————
[1]
[1] > NX SUCCESS Running target "e2e" succeeded
[1]
[1]
[1] npm run e2e:local exited with code 0
--> Sending SIGTERM to other processes..
[0]
[0] ———————————————————————————————————————————————
[0]
[0] > NX ERROR Running target "haven:serve" failed
[0]
[0] Failed tasks:
[0]
[0] - haven:serve
[0]
[0] npm run start exited with code SIGTERM
##[warning]Couldn't find a debug log in the cache or working directory
##[error]Error: Npm failed with return code: 1
Finishing: npm haven-e2e:local
【问题讨论】：
同时使用标志--success="all"，或者不要同时使用，而是通过分叉进程启动然后测试您的应用程序，请参阅：***.com/questions/68874468/…
【参考方案1】：
我能够使用“--success = first”修复此脚本。这将根据“第一个”子节点终止的成功或失败返回退出代码 0 或退出代码 1（npm run e2e:local）。
"e2e:localhost": "concurrently --kill-others --success= first \"npm run start\" \"npm run e2e:local\"
感谢@Lawrence Cherone 的建议。
【讨论】：
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