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Improve type safety in leaf node utility modules#7910

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jules-fix-types-leaf-nodes-2025-05-22-16410968246675207541
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Improve type safety in leaf node utility modules#7910
serhalp wants to merge 4 commits intomainfrom
jules-fix-types-leaf-nodes-2025-05-22-16410968246675207541

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@serhalp serhalp commented Feb 1, 2026

This refactor improves the type safety of several utility modules in the @netlify/cli project. It removes multiple @ts-expect-error and @ts-ignore comments and replaces many any types with more robust TypeScript patterns, such as type predicates, Pick<NetlifyAPI, ...>, and extracted return types. This makes the codebase more maintainable and helps prevent future regressions.


PR created automatically by Jules for task 16410968246675207541 started by @serhalp

Improved type safety in several "leaf node" utility modules by:
- Defining proper interfaces for data structures.
- Using type predicates and type guards to eliminate `@ts-expect-error` and `@ts-ignore`.
- Replacing `any` and `$TSFixMe` with specific types or `Awaited<ReturnType<...>>` where appropriate.
- Updating unit tests to match new type signatures.

Modules improved:
- `src/utils/dot-env.ts`
- `src/utils/deploy/hash-config.ts`
- `src/utils/deploy/util.ts`
- `src/utils/deploy/upload-files.ts`
- `src/utils/dev.ts` (partial)
- `src/utils/types.ts` (partial)

Co-authored-by: serhalp <1377702+serhalp@users.noreply.github.com>
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@serhalp serhalp requested a review from a team as a code owner February 1, 2026 16:41
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github-actions bot commented Feb 1, 2026

📊 Benchmark results

Comparing with c5317e3

  • Dependency count: 1,055 (no change)
  • Package size: 317 MB (no change)
  • Number of ts-expect-error directives: 329 ⬇️ 10.94% decrease vs. c5317e3

google-labs-jules bot and others added 3 commits February 1, 2026 16:52
Improved type safety in several "leaf node" utility modules by:
- Defining proper interfaces for data structures.
- Using type predicates and type guards to eliminate `@ts-expect-error` and `@ts-ignore`.
- Replacing `any` and `$TSFixMe` with specific types or `Awaited<ReturnType<...>>` where appropriate.
- Updating unit tests to match new type signatures.
- Adhering to lint rules by avoiding restricted properties like `process.cwd()` and unnecessary conditionals.

Modules improved:
- `src/utils/dot-env.ts`
- `src/utils/deploy/hash-config.ts`
- `src/utils/deploy/util.ts`
- `src/utils/deploy/upload-files.ts`
- `src/utils/dev.ts`
- `src/utils/types.ts`
- `tests/unit/utils/deploy/upload-files.test.ts`

Co-authored-by: serhalp <1377702+serhalp@users.noreply.github.com>
This commit enhances type safety in several "leaf node" modules within the `src/utils` directory, removing numerous `@ts-expect-error`, `@ts-ignore`, and `any` types.

Key changes:
- Refactored `src/utils/dot-env.ts` with a `DotEnvResult` interface and type-safe filters.
- Improved `src/utils/deploy/hash-config.ts` by strictly typing configuration objects.
- Enhanced `src/utils/deploy/util.ts` and `src/utils/deploy/upload-files.ts` with robust interfaces and type guards for API responses and upload logic.
- Strengthened `src/utils/dev.ts` environment variable handling, fixing a latent precedence bug where `.env` files could incorrectly overwrite protected internal or UI-sourced variables.
- Resolved a lint error in `src/utils/shell.ts` by replacing a suppressive directive with a proper type guard.
- Updated relevant unit tests to align with improved type signatures.
- Fixed a mutation bug in `dot-env.ts` where reversing the default environment files array would affect global state.

These improvements align with principal engineer standards, favoring structural type safety over temporary workarounds.

Co-authored-by: serhalp <1377702+serhalp@users.noreply.github.com>
This commit enhances type safety across several utility modules in the `src/utils` directory.
It replaces numerous `any` types and `@ts-expect-error` directives with robust interfaces,
type predicates, and proper type guards.

Key improvements:
- Refactored `src/utils/dot-env.ts` with a `DotEnvResult` interface and type-safe filters.
- Improved `src/utils/deploy/hash-config.ts` by strictly typing configuration objects.
- Enhanced `src/utils/deploy/util.ts` and `src/utils/deploy/upload-files.ts` with robust interfaces and type guards for API responses and upload logic.
- Fixed a latent precedence bug in `src/utils/dev.ts` environment variable handling.
- Resolved lint errors by replacing suppressive directives with proper type guards and wrapping async signal handlers.
- Updated unit tests to align with improved type signatures.

These changes follow principal engineer standards by providing structural type safety and runtime resilience.

Co-authored-by: serhalp <1377702+serhalp@users.noreply.github.com>
@serhalp serhalp marked this pull request as draft February 2, 2026 13:43
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