Build Time Configuration
Build time configuration is a software development practice where configuration values, such as environment-specific settings or feature flags, are set and embedded into an application during the build process, before deployment. This approach ensures that the application is compiled or assembled with the correct settings for its target environment, such as development, staging, or production. It contrasts with runtime configuration, where settings are loaded dynamically while the application is running.
Developers should use build time configuration to create immutable, environment-specific artifacts that reduce runtime errors and improve security by avoiding the need to expose sensitive configuration data at runtime. It is particularly useful in continuous integration/continuous deployment (CI/CD) pipelines, where different builds are generated for various environments, ensuring consistency and reliability. This practice is common in compiled languages like Java or C#, as well as in modern web development with tools like Webpack or Vite.