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Use topological sorting

nestjs/nest
Based on 3 comments
TypeScript

When managing dependencies between modules or components, implement a topological sorting algorithm to ensure correct initialization order. This prevents cascading errors and ensures that dependencies are properly initialized before they're used.

Algorithms TypeScript

Reviewer Prompt

When managing dependencies between modules or components, implement a topological sorting algorithm to ensure correct initialization order. This prevents cascading errors and ensures that dependencies are properly initialized before they’re used.

Key implementation guidelines:

  1. Detect and handle circular dependencies
  2. When calculating distances between modules, preserve maximum distance when a module is imported by multiple parents
  3. Sort modules by dependency order before initialization

Example implementation for updating module distances:

// When a module is imported by multiple parents
// always use the maximum possible distance
addRelatedModule(module: Module) {
  this._imports.add(module);
  // Use max to prevent distance regression
  module.distance = Math.max(
    module.distance || 0, 
    this._distance + 1
  );
}

This approach ensures stable dependency ordering and prevents initialization issues when components depend on each other. It’s particularly important for frameworks where proper initialization sequence directly affects functionality, such as when providers from one module need to be registered before dependent modules can access them.

3
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TypeScript
Primary Language
Algorithms
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