from-env: Provides a generic way to construct values from environment variables.
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
.
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- from-env-0.1.2.0.tar.gz [browse] (Cabal source package)
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Versions [RSS] | 0.1.0.0, 0.1.1.0, 0.1.2.0, 0.1.3.0 |
---|---|
Dependencies | base (>=4.16.3.0 && <4.17), casing (>=0.1.4 && <0.2), text (>=1.2.5 && <1.3) [details] |
License | MIT |
Copyright | Alexander Goussas 2023 |
Author | Alexander Goussas |
Maintainer | goussasalexander@gmail.com |
Category | Configuration |
Bug tracker | https://github.com/aloussase/from-env/issues |
Source repo | head: git clone https://github.com/aloussase/from-env.git |
Uploaded | by aloussase at 2023-08-08T03:02:48Z |
Distributions | |
Downloads | 199 total (8 in the last 30 days) |
Rating | (no votes yet) [estimated by Bayesian average] |
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Status | Docs available [build log] Last success reported on 2023-08-08 [all 1 reports] |