FsConfig
A type-safe F# library for reading configuration from environment variables and AppSettings.
What is FsConfig?
FsConfig is a configuration library for F# that provides a type-safe way to read settings from environment variables, AppSettings, and other sources like JSON, XML, and INI files. It eliminates boilerplate code by allowing developers to define configuration as F# record types, automatically handling parsing, error reporting, and naming conventions. The library solves the problem of verbose, error-prone configuration management in F# applications, especially those following patterns like The Twelve-Factor App.
F# developers building applications that require robust configuration management, such as web services, microservices, or cloud-native apps following The Twelve-Factor App methodology. It is particularly useful for teams needing type safety, reduced boilerplate, and seamless integration with .NET Core's IConfiguration.
Developers choose FsConfig over alternatives because it leverages F#'s type system to ensure configuration values are correctly typed at compile time, eliminating runtime errors from manual parsing. Its unique selling point is the combination of type safety with flexible customization—supporting complex types like records, lists, and discriminated unions, along with detailed error handling for missing or invalid values.
Overview
FsConfig is a F# library for reading configuration data from environment variables and AppSettings with type safety.
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