Manage your application config as a typesafe struct in as little as two function calls.

https://github.com/JeremyLoy/config

How It Works

Its just simple, pure stdlib.

• A field’s type determines what strconv function is called.
• All string conversion rules are as defined in the strconv package
• If chaining multiple data sources, data sets are merged. Later values override previous values. config.From(“dev.config”).FromEnv().To(&c)
• Unset values remain as their native zero value
• Nested structs/subconfigs are delimited with double underscore
  • e.g. PARENT__CHILD
• Env vars map to struct fields case insensitively
  • NOTE: Also true when using struct tags.

Why you should use this

• Its the cloud-native way to manage config. See 12 Factor Apps
• Simple:
  • only 2 lines to configure.
• Composeable:
  • Merge local files and environment variables for effortless local development.
• small:
  • only stdlib
  • < 180 LoC

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