fix(core): add env var to disable fetching migration metadata from registry

[leosvelperez]

Add a new NX_MIGRATE_SKIP_REGISTRY_FETCH environment variable to opt out of fetching package versions and migrations metadata from the registry and instead, use package installation to get the information.

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Project	Deployment	Preview	Updated (UTC)
nx-dev	Ready	Preview	Sep 25, 2025 4:20pm

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☁️ Nx Cloud last updated this comment at 2025-09-26 07:46:35 UTC

[nx-cloud]

Nx Cloud has identified a possible root cause for your failed CI:

The failure is classified as 'environment_state' because it is caused by an environmental issue rather than the code changes in this pull request.

Analysis of the failure:

The test failure occurs with the error message:

Command failed: npx playwright install --with-deps
E: Could not get lock /var/lib/apt/lists/lock. It is held by process 24753 (apt-get)
E: Unable to lock directory /var/lib/apt/lists/

This is a clear environmental failure where:

1. The system package manager (apt) is already running or locked by another process
2. This prevents Playwright from installing system dependencies with --with-deps
3. The error is related to Linux system package management, not the code changes

Why this is not related to the PR changes:

The PR changes involve:

• Adding a new environment variable NX_MIGRATE_SKIP_REGISTRY_FETCH
• Updating documentation to describe this variable
• Adding logic in migrate.ts to check this environment variable and skip registry fetching

These changes have no relationship to:

• Playwright browser installation
• System package management
• APT lock conflicts
• E2E test environment setup

Evidence this is environmental:

• The error occurs during Playwright browser installation, which is an environmental setup step
• APT lock conflicts are classic environmental issues in CI systems
• The same test appears to have passed in other parts of the test suite, indicating the issue is intermittent and environmental
• No similar failures are present in the <similar_task_failures> section, suggesting this is a transient environmental issue

The failure is unrelated to the pull request's code changes and represents a temporary system-level resource contention issue.

A code change would likely not resolve this issue, so no action was taken.

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[github-actions]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.