cabal-version:      2.4
name:               from-env
version:            0.1.0.0
synopsis:
  Provides a generic way to construct values from environment variables.

description:
  .
  This package exposes a class `FromEnv` that works with `GHC.Generics` to provide a generic way
  to construct values from environment variables.
  .
  In many applications you'll have a configuration object holding a connection string to your
  database, the url of an S3 bucket, you name it. It can be tedious to have to construct this
  configuration object manually. With this package, you just derive `Generic` and then create an
  instance of `FromEnv` for your configuration type and you're done. Just call `fromEnv` and you got
  your configuration.
  .
  > import System.Environment.FromEnv
  > import GHC.Generics
  > newtype Config = Config { configS3BucketUrl :: String } deriving Generic
  > instance FromEnv Config
  > config <- fromEnv
  .
  The default behaviour is to convert field names like `configS3BucketUrl` into 
  environment variables like `CONFIG_S3_BUCKET_URL`, but it can be overriden by providing a
  custom instance of `FromEnv`.

bug-reports:        https://github.com/aloussase/from-env/issues
license:            MIT
author:             Alexander Goussas
maintainer:         goussasalexander@gmail.com
copyright:          Alexander Goussas 2023
category:           Configuration
extra-source-files: README.md

source-repository head
  type:     git
  location: https://github.com/aloussase/from-env.git

library
  exposed-modules:
    System.Environment.FromEnv
    System.Environment.FromEnv.TryParse

  ghc-options:      -Wall

  -- other-modules:
  build-depends:
    , base    ^>=4.16.4.0
    , casing  >=0.1.4     && <0.2
    , text    >=1.2.5     && <1.3

  hs-source-dirs:   src
  default-language: Haskell2010

test-suite from-env-test-suite
  type:               exitcode-stdio-1.0
  ghc-options:        -Wall
  hs-source-dirs:     test
  main-is:            Spec.hs
  other-modules:      System.Environment.FromEnvSpec
  build-depends:
    , base      ^>=4.16.4.0
    , from-env
    , hspec

  build-tool-depends: hspec-discover:hspec-discover
  default-language:   Haskell2010