Cannot reassign procces.env.NODE_ENV in ssr

[sheremet-va]

Describe the bug

I can assign process.env.NODE_ENV, but when accessing it it gets statically replaced.

process.env.NODE_ENV = '123'
console.log(process.env.NODE_ENV)

transformed to

process.env.NODE_ENV = '123'
console.log("test")

This is probably because of the define plugin:

https://github.com/vitejs/vite/blob/6d4ee18e0c45e7c1fedd36c24b631a8f97f40c0f/packages/vite/src/node/plugins/define.ts

Reproduction

vitest-dev/vitest#789

System Info

System:
    OS: Windows 10 10.0.22000
    CPU: (12) x64 Intel(R) Core(TM) i5-10400F CPU @ 2.90GHz
    Memory: 10.73 GB / 15.90 GB
  Binaries:
    Node: 16.13.1 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.17 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 8.1.2 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 98.0.4758.102
    Edge: Spartan (44.22000.120.0), Chromium (98.0.1108.55)
    Internet Explorer: 11.0.22000.120

Used Package Manager

pnpm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/core instead.
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• The provided reproduction is a minimal reproducible example of the bug.

[poyoho]

hi @sheremet-va
vitest use serve mode and use ssr options transform will pass in define plugin. I think the reason in https://github.com/vitejs/vite/blob/main/packages/vite/src/node/plugins/clientInjections.ts#L52-L60.

🙈 maybe process.env['NODE_ENV'] will pass.

and after #6970 will be pass?

[sheremet-va]

hi @sheremet-va vitest use serve mode and use ssr options transform will pass in define plugin. I think the reason in https://github.com/vitejs/vite/blob/main/packages/vite/src/node/plugins/clientInjections.ts#L52-L60.

🙈 maybe process.env['NODE_ENV'] will pass.

and after #6970 will be pass?

After #6970 it does not pass

[poyoho]

oh sorry you are right. processNodeEnv is no pass in ssr mode