Modeling errors in Now CLI
summary
Describes a concrete error-handling system built for Now CLI that uses Flow types to make every call’s error space explicit, converts some thrown API failures into returned error values, and defines an ExpectedError prototype to pattern-match and enrich errors from File Upload, Deployment and Instances APIs. Shows how creating a return-or-throw wrapper and specific error classes forces signature updates, enables precise user messages and err.sh links, and already feeds analytics (Liberato) so the approach proves useful in production.
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chapters (5)
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