Two ways to provide configuration: command-line, yaml file.

1. koanf

   1 14 4,216 7.6 Go

   Simple, extremely lightweight, extensible, configuration management library for Go. Supports JSON, TOML, YAML, env, command line, file, S3 etc. Alternative to viper.

   

   Of course. You should always use a good config package. caarlos0/env is okay but https://github.com/knadh/koanf is a better all around solution imo.

2. AppSignal

   www.appsignal.com sponsored

   Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.

   

3. viper

   2 81 30,482 8.8 Go

   Go configuration with fangs

   

   Not only that, the "unmarshall to struct" method doesn't work at all for environment variables. https://github.com/spf13/viper/issues/188

4. cue

   3 138 6,280 9.9 Go

   The home of the CUE language! Validate and define text-based and dynamic configuration

   

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