chore: use tsx when execution nx to have local plugins working

[BioPhoton]

Problem
This repository uses local Nx plugins and async generators written in TypeScript that need to:

• Import files with .js extensions (ES modules convention)
• Resolve TypeScript path aliases (e.g., @code-pushup/models)

Without proper TypeScript execution setup, Nx commands fail when trying to execute these local plugins/generators.

Solution
Explicit environment variable configuration for both local development and CI:

• Local Development - Use .env.local (gitignored)
• Developers copy .env.local.example to .env.local
• Nx automatically loads .env.local files

Background

Why SWC is skipped when running Nx with NODE_OPTIONS="--import tsx"

Nx has hardcoded transpiler-selection logic for local TS/TSX execution (plugins, executors, generators).
When running with a Node loader like tsx, Nx does not register SWC, even if SWC is available.

Relevant source:
https://github.com/nrwl/nx/blob/81c157d0631927b3d1891453aa45652f3b5a7988/packages/nx/src/plugins/js/utils/register.ts

Key logic:

export function registerTranspiler(
  compilerOptions: CompilerOptions,
  tsConfigRaw?: unknown
): () => void {
  const transpiler = getTranspiler(compilerOptions, tsConfigRaw);

  if (!transpiler) {
    warnNoTranspiler();
    return () => {};
  }

  return transpiler();
}

If getTranspiler(...) returns undefined, Nx intentionally does not register SWC or ts-node.

getTranspiler(...) only detects:

• @swc-node/register
• ts-node

Node loaders like tsx are not detected, so:

• getTranspiler(...) === undefined
• registerTranspiler becomes a no-op
• SWC is effectively disabled by design for this execution path

This is not in @nx/js:swc, but in Nx’s runtime TS/TSX plugin execution pipeline.
Running with NODE_OPTIONS="--import tsx" therefore bypasses SWC via hardcoded logic.

Related:

• refactor: add sync generator for zod2md tooling setup #1188
• refactor: add sync generator for zod2md tooling setup #1188 (comment)

Closes #1238

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 39ec97d

Command	Status	Duration	Result
nx run ci:code-pushup -- merge-diffs --files=/h...	✅ Succeeded	5s	View ↗
nx run-many --targets=code-pushup --parallel=fa...	✅ Succeeded	1m 30s	View ↗
nx run-many --targets=code-pushup --parallel=fa...	✅ Succeeded	13m 48s	View ↗
nx run-many -t unit-test,int-test	✅ Succeeded	2m 3s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-02-23 13:45:30 UTC

[pkg-pr-new]

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@code-pushup/ci

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/ci@1242

@code-pushup/cli

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/cli@1242

@code-pushup/core

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@code-pushup/create-cli

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/create-cli@1242

@code-pushup/models

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/models@1242

@code-pushup/axe-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/axe-plugin@1242

@code-pushup/nx-plugin

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@code-pushup/coverage-plugin

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@code-pushup/eslint-plugin

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@code-pushup/js-packages-plugin

npm i https://pkg.pr.new/code-pushup/cli/@code-pushup/js-packages-plugin@1242

@code-pushup/jsdocs-plugin

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@code-pushup/lighthouse-plugin

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@code-pushup/typescript-plugin

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@code-pushup/utils

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commit: 39ec97d

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit 0bbda72 with previous commit dd6e35e.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Security	🔴 39	🔴 0
Performance	🔴 36	🔴 47
Best Practices	🟢 100	🟢 97
Updates	🟡 75	🟡 72
Bug prevention	🟡 75	🟡 75
Axe Accessibility	🟡 88	🟡 88
Code style	🟢 100	🟢 100	–
Code coverage	🟢 93	🟢 93	–
Type Safety	🟡 67	🟡 67	–
Miscellaneous	🟡 67	🟡 67	–
Documentation	🟡 53	🟡 53	–
Accessibility	🟢 92	🟢 92	–
SEO	🟢 92	🟢 92	–

👍 1 group improved, 👎 3 groups regressed, 👍 5 audits improved, 👎 5 audits regressed, 19 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
JS packages	npm audit	🔴 39	🔴 0
Lighthouse	Performance	🔴 36	🔴 47
Lighthouse	Best Practices	🟢 100	🟢 97
JS packages	npm outdated dependencies	🟡 75	🟡 72

30 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	No issues in the Issues panel in Chrome Devtools	🟩 passed	🟥 failed
Lighthouse	Reduce unused JavaScript	🟥 Potential savings of 225 KiB	🟨 Potential savings of 256 KiB
Lighthouse	Remove duplicate modules in JavaScript bundles	🟥 Potential savings of 93 KiB	🟨 Potential savings of 69 KiB
JS packages	Vulnerabilities for npm prod dependencies.	🟥 12 vulnerabilities (3 high, 2 moderate, 7 low)	🟥 22 vulnerabilities (13 high, 3 moderate, 6 low)
Lighthouse	Largest Contentful Paint	🟥 11.6 s	🟥 4.5 s
Lighthouse	Speed Index	🟥 7.3 s	🟥 6.0 s
JS packages	Outdated npm prod dependencies.	🟨 20 outdated package versions (6 major, 10 minor, 4 patch)	🟨 21 outdated package versions (7 major, 11 minor, 3 patch)
JS packages	Outdated npm dev dependencies.	🟨 62 outdated package versions (29 major, 25 minor, 8 patch)	🟨 61 outdated package versions (30 major, 25 minor, 6 patch)
Lighthouse	Total Blocking Time	🟥 1,630 ms	🟥 1,540 ms
Lighthouse	Time to Interactive	🟥 13.5 s	🟥 13.8 s
Lighthouse	Avoids enormous network payloads	🟩 Total size was 2,091 KiB	🟩 Total size was 2,137 KiB
Lighthouse	Minimizes main-thread work	🟥 10.3 s	🟥 9.4 s
Lighthouse	Server Backend Latencies	🟩 310 ms	🟩 1,170 ms
Lighthouse	Uses efficient cache policy on static assets	🟨 31 resources found	🟨 31 resources found
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	JavaScript execution time	🟥 3.0 s	🟥 3.2 s
Lighthouse	Reduce unused CSS	🟥 Potential savings of 111 KiB	🟥 Potential savings of 110 KiB
JS packages	Vulnerabilities for npm dev dependencies.	🟥 48 vulnerabilities (3 critical, 9 high, 32 moderate, 4 low)	🟥 81 vulnerabilities (3 critical, 65 high, 10 moderate, 3 low)
Lighthouse	First Contentful Paint	🟥 3.1 s	🟥 3.1 s
Lighthouse	Max Potential First Input Delay	🟥 990 ms	🟥 1,000 ms
Lighthouse	Network Round Trip Times	🟩 30 ms	🟩 20 ms
Lighthouse	Avoids an excessive DOM size	🟥 2,366 elements	🟥 2,360 elements
Axe	Elements must only use supported ARIA attributes	🟩 101 elements	🟩 96 elements
Axe	ARIA attributes must be used as specified for the element's role	🟩 101 elements	🟩 96 elements
Axe	Elements must only use permitted ARIA attributes	🟩 101 elements	🟩 96 elements
Axe	ARIA attributes must conform to valid names	🟩 101 elements	🟩 96 elements
Lighthouse	Initial server response time was short	🟩 Root document took 510 ms	🟩 Root document took 510 ms
Code coverage	Line coverage	🟩 92.7 %	🟩 92.7 %
Lighthouse	Cumulative Layout Shift	🟩 0	🟩 0

650 other audits are unchanged.

[github-actions]

Code PushUp

🥳 Code PushUp report has improved – compared current commit 0bbda72 with previous commit dd6e35e.

💼 Project utils

🥳 Code PushUp report has improved.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Documentation	🟡 60	🟡 60

5 other categories are unchanged.

👍 1 group improved

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
JSDocs coverage	Documentation coverage	🟡 60	🟡 60

14 other groups are unchanged.

🛡️ Audits

All of 444 audits are unchanged.

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13 other projects are unchanged.